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<title cf:type="text"><![CDATA[Editorial department of the Journal of National University of Defense Technology -->Information &  Communication Engineering]]></title>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Study on the Optimum (n,2,w) Binary Constant Weight Error-detecting Codes]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199004013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The paper discusses the existence of optimum(n,2,w) binary constant weight error-detecting codes. A succinct proof is given for the conclusion made by prof. Wang xinmei (china science,vol.11,1987) when n is even. The author also gives a proof for the conjecture of the wang xinmei’s paper.]]></description>
<pubDate>2015/7/4 9:18:37</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Xiao Rong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Xiao Rong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199004013]]></guid><cfi:id>576</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[On Complete Recurrence Sampling of m-Sequences]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199004014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents the concept of recurrence sampling of m-sequences. The complete recurrence sampling of the m-sequence with a  prime number period is studied and solved. In the case of composite number period，some useful conclusions are achieved.]]></description>
<pubDate>2015/7/4 9:18:37</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Tang Chaojing and Xiao Rong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Tang Chaojing and Xiao Rong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199004014]]></guid><cfi:id>575</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Method to Get the Longest Period of Feedforward Sequences]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199004015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper discusses the periodicity of feedforward sequences.A general method to get the longest period of feedforword sequences is put forward.]]></description>
<pubDate>2015/7/4 9:18:38</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Xiao Rong and Tang Chaojing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Xiao Rong and Tang Chaojing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199004015]]></guid><cfi:id>574</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A New Radar Constant-False-Alarm-Rate（CFAR) Processor]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199004018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[How to maintain the false-alarm-rate constant of radar detecting system is one of the important problems in modern radar technology and signal processing technology. In order to obtain constant-false-alarm-rate in the complex clutter surrounding，radar detecting system must have a constant-false-alarm-rate processor (CFAR Processor). The AC-CFAR processor discussed in this paper is a new processor. Its CFAR threshold is implemented by selecting a mean value which approaches  the detected distance-cell value. On the basis of simple hardware-implement，the AC-CFAR processor has an adaptive performance which can timely reflect the changes of external clutter，and a very good perfermance of anti-multitarget effect and antic1utter edge effect as well. It can also resist the effect ofb“ig target eat small target” and reduce CFAR loss.]]></description>
<pubDate>2015/7/4 9:18:37</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Ji Shulong, Huangfu Kan, Zhou Liangzhu and Sun Zhongkang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Ji Shulong, Huangfu Kan, Zhou Liangzhu and Sun Zhongkang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199004018]]></guid><cfi:id>573</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An Adaptive Echo Canceller in Full-Duplex Analog Speech Secure System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199104006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The paper introduces an adaptive echo canceller in full-duplex analog speech secure system. The implementation of the canceller is made possible by using a block-update method to update the transversal filter coefficients. The method has advantages in convergence properties and computational efficiency over the standard mininum gradient algorithm. It also meets the echo canceller requirements of the CCITT G.165 recommentlation.]]></description>
<pubDate>2015/7/4 9:19:33</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Wang Yaoxun, Chen Guozhang and Yi Bo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wang Yaoxun, Chen Guozhang and Yi Bo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199104006]]></guid><cfi:id>572</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Experimental Investigation of Impulse Radar for Mitigation of Effects of Radar Absorbing Materials]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199203008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The response of UWB signal acting on the coating radar absorbìng maferial (RAM) targets have been investigated experimentally by time-domain method and frequency-domain method in this paper. It is shown that the UWB signal is 10～12dB superior to the narrowband signal of conventional radar for anti-coating RAM'S targets，and it has been clearly indicated that UWB signal has indeed good capabilities for mitigation of effects of RAM.]]></description>
<pubDate>2015/7/4 9:20:19</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[He Jianguo, Lu Zhongliang and Su Yi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>He Jianguo, Lu Zhongliang and Su Yi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199203008]]></guid><cfi:id>571</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Derivation of Some Formulas on Gaussian Beams Method in Three-dimensional Structures]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199201002]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The practical formulas for Gaussian Beams method are theoretically derived. The properties of Gaussian beams are investigated. The transmissive laws in free space and the reflective laws of Gaussian Beams are mentioned. Also the choice of initial value of the Gaussian Beam and the offset phase for reflection in Gaussian Beams Method are investigated in this paper. These will be very useful in the application of Gaussian Beams Method in three-dimensional structures.]]></description>
<pubDate>2015/7/4 9:19:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Xiao Gaobiao and Zhang Jun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Xiao Gaobiao and Zhang Jun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199201002]]></guid><cfi:id>570</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Studies on the Communication Protocol of the Integrated Ring Network]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199201003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The conclusion that the optical fiber ring shaped local area network in the optimal integrated service network in the future has been put  forward according to the discussion of the present situation and the tendency of LAN development，the frame structure fit for integrated service switch in LAN has been put forword，a layered description of the communication protocol has been given，the method realizing boundary movement has been put forword，and the software based on the form of messages and tactics of boundary movement has been realized.]]></description>
<pubDate>2015/7/4 9:19:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Xue Xiaoyu and Chen Yuebo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Xue Xiaoyu and Chen Yuebo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199201003]]></guid><cfi:id>569</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Studies of Algorithms for Maneuvering Target Tracking]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199201006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Maneuvering target tracking is an important problem in radar data processing. Several algorithms such as Singer，IE，VD，and IMM algorithms have  been studied in the last few years and have been summerized in this paper. The real time constrains have to be considered in application. This paper presents a modified input estimstion (MIE) algorithm and an adaptive α-β algorithm. Both algorithms require a minimum amount of computation. Computer simulation studies have shown the effectiveness of the two algorithms in tracking maneuvering targets.]]></description>
<pubDate>2015/7/4 9:19:56</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Luo Pengfei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Luo Pengfei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199201006]]></guid><cfi:id>568</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Experimental Impulse Radar System and Data Processing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199303009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[An experimental impulse radar system is presented. This system，known as free space system，is located in a microwave anechoic chamber. The transmitting and receiving antennas，A/D converter，controlling board and data processor are specially designed. This system can receive echoes of many kinds of targets and obtain the results in real time. In this paper，we also discussed the data processing technique and present a regularization means to solve the impulse response，estimate AR model parameter and give the real data processing results. All these results verify the efficiency of this system. In the last，we introduce the procedure of measuring the echo signal of RAM-covered target. Through the comparison，we verify that impulse radars have the ability of anti-stealth targets.]]></description>
<pubDate>2015/1/23 11:00:21</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Lu Zhongliang,Su Yi,He Jianguo and Yu Zhiwu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Lu Zhongliang,Su Yi,He Jianguo and Yu Zhiwu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199303009]]></guid><cfi:id>567</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Minimax Approach to Radar Target Identification in Frequency Domain]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199303010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new method for extracting radar target pole features from its RCS is presented in this paper. The mathematical frames and calculation procedures are formulated in detail. The computer simulation is performed and the results show the method proposed is effective and feasible.]]></description>
<pubDate>2015/1/23 11:00:21</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Zhuang Zhaowen<sup>1</sup>,Guo Guirong<sup>1</sup> and Ke Youan<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Zhuang Zhaowen<sup>1</sup>,Guo Guirong<sup>1</sup> and Ke Youan<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199303010]]></guid><cfi:id>566</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis and Design for the Multimode Conical Feedhorn with a Step of Radius]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199403005]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A 8mm wave multimode conical feedhorn with a step of radius has been developed. Its mode ratios are calculated and the formulas of its radiation patterns in two principle planes-H plane and E plane, the voltage standing wave ratio (VSWE)，and the properties of beamwidth and sidelobe are  given. Theoretical analysis and measurements show that in the range of frequency of 34.lGHz to 35.5GHz，its radiation patterns have been   equalized in amplitude within 13dB and no sidelobe exists within 23dB.]]></description>
<pubDate>2015/1/23 10:59:29</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Li Guoqing and Yao Demiao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Guoqing and Yao Demiao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199403005]]></guid><cfi:id>565</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Optimum Design of 8mm lower Sidelobe Cassegrain Antenna]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199403006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Subreflector blockage causes the side lobe level of litlle aperture cassegrain antenna to rise. In order to solve the problem，an optimization-correction method is presented. The method optimizes aperture distribution and corrects the shapes of dual reflector. A 8mm lower sidelobe cassegrain antenna is designed. The experimental result is in agreement with the theory computation.]]></description>
<pubDate>2015/1/23 10:59:29</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Qi Lingfei,Yao Demiao and Mao Junjie]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Qi Lingfei,Yao Demiao and Mao Junjie</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199403006]]></guid><cfi:id>564</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Afterglow Simulation of the Raster Scanning Radar Indication System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199403007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the raster scanning radar display system，the simulation of afterglow effect in the random scanning radar display system is an important  unsolved problem in up-to-date radars. This article introduces a new type of radar display system in raster scanning mechanism as well as the  method to realise ofterglow effect. Based on the theory of Pseudo-random sequence, the simulation of afterglow effect in the random scanning radar is accomplished and a perfect simulation effect will therefore be achieved by means of using a shift memory to create a random address generator，using a high-speed read-only memory (PROM) to trace data，and perform the reading，revising and writing process on video memory (VRAM) so as to decrease the video data progressively.]]></description>
<pubDate>2015/1/23 10:59:29</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Jia Ping and Xu Guoqiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Jia Ping and Xu Guoqiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199403007]]></guid><cfi:id>563</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Aircraft Recognition by Using Bispectral Estimation Based on Mellin Transform]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199501005]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Radar target recognition is an important aspect of modern radar technology. With the development of radar technology at higher levels and  better functions，it is necessary to set up an advanced automatic target recognition system in air-defence. In this paper，according to  aircraft's fast and flexible features，a new recognition approach is proposed by using Mellin transform and bispectrum estimation to obtain radar targets' signatures. The nearest-neighbour (NN) alogrithm can be used for classification of radar targets The results of computer stimulation tests show that this approach has better noise proof ability and higher recognition rate.]]></description>
<pubDate>2014/6/11 15:46:13</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Guo Jing<sup>1<sup>,Guo Guirong<sup>2<sup> and Su Jianzhi<sup>1<sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Guo Jing<sup>1<sup>,Guo Guirong<sup>2<sup> and Su Jianzhi<sup>1<sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199501005]]></guid><cfi:id>562</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Influence of Coordinate Transform upon the Measurement Error of Bistatic/Multistatic Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199501006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents a discussion of the influence of coordinate transform on the measurment error of bistatic/multistatic radar system. Quantitative analysis of the influence and relative conclusions are also given in the paper.]]></description>
<pubDate>2014/6/11 15:46:13</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Cheng Hongwei and Sun Zhongkang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Cheng Hongwei and Sun Zhongkang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199501006]]></guid><cfi:id>561</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A New Method of Recognizing One-dimensional Range Profiles of Radar Targets]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199604014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper，a new method of recognizing one-dimensional range profiles of high resolution radar targets is proposed. The algorithms of image  processing are used in this method. First，we code one-dimensional range, profiles, then，use Fourier transformation to extract a series of formal features which can be recognized by neural networks. The experimental results show that，in some aspect angle interval, the recognition is good.]]></description>
<pubDate>2014/6/11 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Zhang Wenfeng,He Songhua and Guo Guirong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Zhang Wenfeng,He Songhua and Guo Guirong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199604014]]></guid><cfi:id>560</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Study of Direct Sampling of IF Signal on Data Acquisition System in Ultra Wide Band Radar（UWBR)]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199706012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To perform high-speed data acquisition in UWBR，this paper discusses the availability of direct sampling of IF/RF signal and digital quadrature detecting technology on wide-band signal（>=20MHz) demonstrating. Three digital detecting methods are analyzed by computer simulation. The  results shows a great improvement on the conformability of phase and magnitude as well as image ratio (IR)，which is less than-30dB in classical detectors.]]></description>
<pubDate>2014/5/28 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Li Yueli and Zhou Zhimin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Yueli and Zhou Zhimin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199706012]]></guid><cfi:id>559</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Identification Method of False-Targets in T/R-R Bistatic Radar System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199705001]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents an identification method of deception false targets in bistatic radar system. On the basis of the data correlation algorithm in bistatic radar system，the identifying rules of the real and the false targets are provided. The experimental simulations show that the method is effective to identify the false targets in the condition of EW.]]></description>
<pubDate>2014/5/28 9:49:12</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Yang Lin,Xu Hui and Sun Zhongkang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Yang Lin,Xu Hui and Sun Zhongkang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199705001]]></guid><cfi:id>558</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of the Transient Electromagnetic Scattering Properties of An Ellipsoid of Revolution]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199705002]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[An improved method of Stepping-in-Time Procedure to compute the EM impulse response properties of conducting bodies of revolution is provided  in this paper. By this method，the two dimensions problem on surface is separated into one dimension problem and the time needed is shortened.   It can be applied to large scale bodies target. Using the method，the response waves of conducting sphere under different impulses length and the response wave of ellipsoid of different length are computed and discussed.]]></description>
<pubDate>2014/5/28 9:49:12</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Tian Lisong,Qiu Lan,Liu Kecheng and He Jianguo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Tian Lisong,Qiu Lan,Liu Kecheng and He Jianguo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199705002]]></guid><cfi:id>557</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Structure Description of Fully Polarized Radar Targets Based on Matrix Pencil Method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199704011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the backscattering returns of high range resolution and full polarization radar, the Matrix Pencil method is proposed to describe the radar target as a set of scattering centers along its range. The concept of transient polarization response (TPR) is used to represent the full-polarimetric information of the scattering centers. Thus a new approach tor characterizing the target structure is developed.]]></description>
<pubDate>2014/5/28 9:47:42</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Zhang Xun,Zhuang Zhaowen and Guo Guirong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Zhang Xun,Zhuang Zhaowen and Guo Guirong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199704011]]></guid><cfi:id>556</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Bispectrum Analytical Method of Ultra-wideband Radar Echoes]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199703006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Spectrum analysis is the most important branch in radar signal processing and significant of radar target classification and feature detection. Having the special property, higher spectrum is very useful for us to analyse radar echoes from a new view. This paper presents double (Q, K) bispectrum algorithm for ultra-wideband radar echoes. Compared with other bispectrum estimation algorithm, simulation results show that the algorithm we presented here has significant improvement. At last, we cite an example for the application.]]></description>
<pubDate>2014/5/28 9:47:29</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Deng Ge,Chen Nuxing,Lu Jun,Su Yi and Lu Zhongliang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Deng Ge,Chen Nuxing,Lu Jun,Su Yi and Lu Zhongliang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199703006]]></guid><cfi:id>555</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Numerical Analysis and Experimental Results of Plannar Spiral Antenna Mounted on the grounded Double-layer]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199703010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[An Archimedean plannar spiral antenna mounted on the grounded double-layer is investiged. Based on the substrate superstrate Green' s function in terms of Sommerfeld-type integrals for a horizontal Hertzian dipole on the superstrate, the current distribution along the spiral arm is determined by using an integral equation with the moment method, the input impedance, radiation pattem, axial ration and power gain are calculated on the basis of the obtained current distrbution, which is very important for optimum design of the printed wire antennas. Experimental results show that the numerical method is correct .]]></description>
<pubDate>2014/5/28 9:47:29</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Yuan Haijun and Zhang Jun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Yuan Haijun and Zhang Jun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199703010]]></guid><cfi:id>554</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Radar Target Recognition Based on Multiresolution Analysis]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199702012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A target recognition approach based on multiresolution analysis is proposed, and tested on returns of high range resolution radar. Features of targets are extracted by computing the logarithms of the ratios of energies in adjacent scales defined by wavelet transform. With multiresolution analysis, the features are decomposed into the highpass features reflecting detailed structure of targets and the lowpass features showing the outline of the targets. A radial basis function neural network is applied for classification.]]></description>
<pubDate>2014/5/28 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Zhang Xun,Guo Guirong and Zhuang Zhaowen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Zhang Xun,Guo Guirong and Zhuang Zhaowen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199702012]]></guid><cfi:id>553</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Research on Radar Receiving Signal Model in EW Condition]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199701011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The radar signal model in EW condition is discussed in this paper, including the model of emitting signal, the model of target echo signal, the model of jamming, the model of clutter and the model of noise.]]></description>
<pubDate>2014/5/28 9:46:38</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Wang Guoyu,Lu Xiaowen and Liao Xiangping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wang Guoyu,Lu Xiaowen and Liao Xiangping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199701011]]></guid><cfi:id>552</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Computer Simulating of Space EM Environment]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199701014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The radar signal environment near the space plate is simulated and counted by computer through the establishment of ground radar database in this paper. The thesis describes the radar record fields, computer models and simulating software block structure. Some simulating results are delivered, including the radar signal stream density and various kinds of distribution.]]></description>
<pubDate>2014/5/28 9:46:39</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Wang Guoyu,Lu Weining and Wang Zhanying]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wang Guoyu,Lu Weining and Wang Zhanying</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199701014]]></guid><cfi:id>551</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Anti-Stealth mechanism of UWB Rader]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199701016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The anti-stealth mechanism of UWB/IR is disscussed in details. The difference of echoes between impulse radar and conventional radar is analysed and compared in many aspects such as the UWB property, short time feature, signal precursor effects, electromagnetic missile characteristic for impulse signal, and molecular relaxation and self induced transparency of RAM. The preliminary experiment results show that UWB/IR have advantageous anti-stealth capability.]]></description>
<pubDate>2014/5/28 9:46:39</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[He Jianguo,Lu Zhougliang and Liu Kecheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>He Jianguo,Lu Zhougliang and Liu Kecheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199701016]]></guid><cfi:id>550</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An Efficient Algorithm for UWB-SAR Imagery]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199804012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[After summarizing some difficulties of large processing-angle UWB-SAR imagery briefly, the wavenumber domain algorithm (Ω-K algorithm) is used for UWB-SAR imagery in this paper. Then the theory of Ω-K algorithm is described and the problems like Stolt Interpolating are analyzed in detail. Eventually, numerical experiments on simulated echo model are presented. All results show that this algorithm has good focusing capabilities.]]></description>
<pubDate>2014/1/3 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Wang Shunhua,Huang Xiaotao and Liang Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wang Shunhua,Huang Xiaotao and Liang Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199804012]]></guid><cfi:id>549</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Application of Hough Transform to Target Detection and Track Initiation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199804013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Typical method of target detection is Bayesian method which is usually applied to threshold detection. In this paper, we discuss a method for simultaneous target detection and tracking based on Hough Transformation by means of incoherent integration. As to the situation of return signals with different signal to noise ratio (SNR), we discuss two forms of incoherent integration, direct integration and binary integration. Binary integration has its unique advantage in weak target detection. Theoretical performance analysis is also presented in the paper.]]></description>
<pubDate>2014/1/3 16:01:27</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Cheng Hongwei and Sun Zhongkang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Cheng Hongwei and Sun Zhongkang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199804013]]></guid><cfi:id>548</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Buffer Control of DCT-Based Intrafield Videl Coding]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199804014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new buffer-control policy for DCT-based intrafield video coder is presented. It selects quantization parameter based on the number of three kinds of blocks in a picture and the rate-quantization models (R-Q model) for three kinds of blocks. It adapted to the scene changes through re-encoding the picture and adjusting the R-Q model. A simple and effective criterion is presented to classify the blocks, the classifying result based on it is close to the result gotten through quantizing the bits needed to code a block into three levels. This method can be applied to some other coding techniques such as H.261; MPEG, extra computations are modest. Simulation results show that this buffer control policy can control the output bit rate steadily even at scene changes.]]></description>
<pubDate>2014/1/3 16:01:27</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Lou Shengqiang,Huangfu Kan,Zhou Liangzhu and Wan Jianwei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Lou Shengqiang,Huangfu Kan,Zhou Liangzhu and Wan Jianwei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199804014]]></guid><cfi:id>547</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Optimizing Calculation of the Phased Array in Any Scanning Space]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199803017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper, we've discussed the methods of deciding the optimal spacing between elements and the oblique angle of the phased array antennas. Instead of drawing only by hands, we design a program, which can be used for optimizing calculation and drawing automatically. Furthermore, it's simple and of high precision.]]></description>
<pubDate>2014/1/3 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Tan Huaiying,Liu Kecheng and He Jianguo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Tan Huaiying,Liu Kecheng and He Jianguo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199803017]]></guid><cfi:id>546</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A New Type Printed Planar log-Periodic Antenna]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199803022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[On the basis of the old printed planar log-periodic antenna, a new type is proposed. Overcoming the shortcomings the old one has, the new one has better properties. 0.4～2GHz new type antennas are manufactured, VSWR, gain, E plane and H plane far field pattems over the entire frequency range are measured, showing very good broadband properties.]]></description>
<pubDate>2014/1/3 16:01:17</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Qi Lingfei,Yao Demiao and Mao Junjie]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Qi Lingfei,Yao Demiao and Mao Junjie</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199803022]]></guid><cfi:id>545</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Distrbuted Adaptive Estimation for Tracking a Maneuvering Target in Clutter]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199802010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The problem of tracking a maneuvering target in a cluttered environment by multuple radars is considered. This paper presents a distributed fusion algorithm. The local nodes transmit their estimation results to the fusion node, where the local estimation results are combined to obtain global estimation. The Monto-Carlo simulation shows that the distributed fusion algorithm performs much better than the local estimation algorithm in every function index and achieves the expected effect.]]></description>
<pubDate>2014/1/3 16:01:05</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Gao Jianjun,Cui Taorui,Zhou Hongren and Gui Xianzhou]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Gao Jianjun,Cui Taorui,Zhou Hongren and Gui Xianzhou</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199802010]]></guid><cfi:id>544</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Algorithms of Target Position Location with Two Coordinate Measurements in Bistatic Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199802011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The algorithm of position location with two coordinate measurements in bistatic radar is presented in this paper, which uses the measurements of slant range and the azimuth referred to T/R station or the ones of range sum (target to T/R and R) and the azimuth to R station. The analysis method of the position location accuracy is given. Finally, the performances of these algorithms are evaluated by computer simulations.]]></description>
<pubDate>2014/1/3 16:01:05</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Liu Qi and Sun Zhongkang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Liu Qi and Sun Zhongkang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199802011]]></guid><cfi:id>543</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[TDOA Passive Location and Accuracy Analysis]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199802012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new exact, explicit, uniterative, and computationally effcient solution of nonlinear equation set for estimation of emitter position based on the time differences of arrival (TDOA) measured by multi-stations is proposed in this paper. The accuracy analysis of the location method is also presented. Finally performance evaluation results of emitter location by using TDOA information are illustrated by some graphs of Geometrical Dilution of Precision (GDOP) under various conditions in the specific surveillance region.]]></description>
<pubDate>2014/1/3 16:01:05</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Yang lin,Zhou Yiyu and Sun Zhongkang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Yang lin,Zhou Yiyu and Sun Zhongkang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199802012]]></guid><cfi:id>542</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Dithering Infrared Low SNR Target Detection Algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199802013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper it is presented to resolve the dithering infrared target detection problem under the condition of low SNR. Accumulation of multiframes is often adopted in low SNR infrared target detection, but for dithering low SNR target, this simple accumulation scheme maybe degrade greatly. In this paper, detection algorithm based on dilation before accumulation of multiframes and track before detection is proposed. The dilation operation enables the energy of the same target in different frames to accumulate effectively dispite of the dithering of target, thus we can reach the aim of enhencing the target. The false alarm candidates are removed in the procedure of track before detection. A preprocessing algorithm using wavelet transform is also adopted to remove the correlation of 1/f noise. At the end of this paper, the whole algorithm is simulated with infrared image sequence. A high performance is obtained and the experimental result indicates that the algorithm can effectively detect the target with SNR=2.]]></description>
<pubDate>2014/1/3 16:01:05</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Xiong Hui and Shen ZhenKang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Xiong Hui and Shen ZhenKang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199802013]]></guid><cfi:id>541</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Analyse and Recognition of Radar Targets Scattering Signal With Chaos Multifractal Theory]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199802014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper introduces the recently developed chaos and multifractal theory into the fields of radar signal processing for radar target characteristic and recognition. The Lyapunov exponents of five kinds of planes are calculated. With the correlation integral method, the multifractal dimensions of these targets's cattering signal are further obtained. Then we carry on the experiment of radar target recognition and get satiafactory recognition-rate. The results of this paper show that the chaos and multifractal theory have great potentials in the fields of tadar signal processing and target recognition.]]></description>
<pubDate>2014/1/3 16:01:05</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Xian Ming,Zhuang Zhaowen,Xiao Shunping and Guo Guirong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Xian Ming,Zhuang Zhaowen,Xiao Shunping and Guo Guirong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199802014]]></guid><cfi:id>540</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Back Projection Imaging I、Q Realization of Impulse Signal SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199802015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The characteristics of impulse signal synthetic aperture radar (SAR) imaging are analyzed in this paper. It is shown that the linear array model is an efficient interpretation to the azimuth integration of an impulse SAR. Back projection (BP) method can be comprehended easily with a linear array model. With respect to the algorithm realization in a field system, the BPIQ method with back projection to I, Q channels respectively and then evaluating the module of two integration's is presented. Computer simulations show that the imaging results of BPIQ are better than those of the ordinary BP algorithm.]]></description>
<pubDate>2014/1/3 16:01:05</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Su Yi and Liang Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Su Yi and Liang Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199802015]]></guid><cfi:id>539</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Effect of Amplitude-phase Errors on the Performance of Sparse Array Anten]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199801012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper analyzes the effects of amplitued-phyase errors and element failure on antenna gain，beam width，beam direction，and sidelobe level in sparse array. With the help of statistic principle，the estimtion ormulas of the antenna gain loss，beam width and siedlobe level in sparse array are derived.]]></description>
<pubDate>2014/1/3 16:00:53</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Qiu Lijun,Zhou Zhimin and Liang Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Qiu Lijun,Zhou Zhimin and Liang Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199801012]]></guid><cfi:id>538</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Wavelet Packet Transforming to Counteract the Impulse and Narrow-banded Interference in Multicarriers Modulation System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199801013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The wavelet packet transforming (WPT) can give finer time-frequency localization of a signal. ln this paper，a model of multicarrier modulation system using  WPT is proposed. Based on this model，a method is studied to counteract the impulse and narrow-banded interference，using  decomposition of a signal in the time-frequency plane. An algorithm to select the time-frequency atom is given.]]></description>
<pubDate>2014/1/3 16:00:53</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Wei Jibo and Cheng Shixin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wei Jibo and Cheng Shixin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199801013]]></guid><cfi:id>537</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Toll-quality，Low-delay 8kb/s Speech Coder]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199801014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents a 8kb/s speech coder which is based on CELP. The coder can offer toll-quality coded speech and low coding delay. The  structure of the algorithm is described and the performance is analyzed. The coder and decoder can be implemented by one general-purposed  33MIPS fixed-point DSP chip. According to the objective SNR test and informal listening test，the coder shows good performance.]]></description>
<pubDate>2014/1/3 16:00:53</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Lin Jiayu and Yi Bo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Lin Jiayu and Yi Bo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199801014]]></guid><cfi:id>536</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Reconfigurable Multiprocessor Architecture for UWB Radar Real-time Signal Processing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199801015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The signal processing of Ultra-Wide Band (UWB) radar is a multi-task and compute-intensive procedure，so parallel multiprocessor technology must be employed to finish the procedure efficiently. This paper thoroughly analyzes the features of UWB radar real-time signal processing system. Based on the comparison between the advantages and disadvantages of various multiprocessor systems，a reconfigurable UWB radar real-time signal processing system architecture is proposed. The application of this architecture to practical systems shows its good performance，reconfigurability and flexibility.]]></description>
<pubDate>2014/1/3 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Chen Nuxing,Deng Ge and Su Yi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Chen Nuxing,Deng Ge and Su Yi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199801015]]></guid><cfi:id>535</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Study of Target Recognition Based on the Polarization Decomposition]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199906012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper, the property of radar target in the optics region is investigated on the basis of polarimetric and high-resolution radar system. By means of polarization decomposition theory, one complex target is decomposed into three simple targets.Polarization feature parameter extracted to describe the relationship of these simple targets is used in target recognition of four kinds of aircraft. Good results are ebtained.]]></description>
<pubDate>2013/11/18 15:33:17</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Li Dun,Xiao Shunping,Wang Xuesong and Lv Tongguang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Dun,Xiao Shunping,Wang Xuesong and Lv Tongguang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199906012]]></guid><cfi:id>534</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Application of the Integrated Generalized Ambiguity Function for Radar Multi-Target Resolving]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199906013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[It is a functional extension of the conventional radar for the multi-target resolving. IGAF is an effective tool for the detection and parameter estimation of mono or multicomponent polynomial-phase signals. It is proved to be feasible that the application of IGAF for radar multi-resolving by analyzing the radar data. Some key problems which are remained to be further studied are discussed.]]></description>
<pubDate>2013/11/18 15:33:17</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Dai Zhengjian,Zou Huanxin,Yu Wenxian and Hu Weidong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Dai Zhengjian,Zou Huanxin,Yu Wenxian and Hu Weidong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199906013]]></guid><cfi:id>533</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Radar Systematic Error Estimation Based On the Analysis Observability]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199905014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper, a systematic error observation model for multiple radars is established, on the basis of which the system observability is analyzed and a conclusion is drawn that measurement accumulation does not always lead to higher observability. According to the conclusion a measurement subset can be produced by means of data selection, which causes higher system observability, to estimate the systematic error . Simulation result shows that the method proposed in this paper can ensure the validity of estimation algorithm.]]></description>
<pubDate>2013/11/18 15:32:31</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Yang Hongwen,Yu Wenxian,Hu Weidong and Wu Jianhui]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Yang Hongwen,Yu Wenxian,Hu Weidong and Wu Jianhui</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199905014]]></guid><cfi:id>532</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[2-D Virtual ESPRIT Algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199904015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[ESPRIT algorithm is a fast direction finding method with high resolution, but it is a 1-D method and can't be generalized to 2-D directly. This paper, based on a special array geometry, proposes a new 2-D direction finding method-2-D Virtual ESPRIT algorithm, whose low computation cost is comparable with to that of 1-D ESPRIT algorithm.]]></description>
<pubDate>2013/11/18 15:32:46</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Liu Quan,Wang Xuesong and Huangfu Kan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Liu Quan,Wang Xuesong and Huangfu Kan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199904015]]></guid><cfi:id>531</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Analysis and Correction of Quadrature Demodulation Errors of Ultra-Wide-Band Signal]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199904016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the receiving system of Ultra-Wide Band (UWB) coherent receiver, the amplitude and phase unbalances and DC offsets of in-phase and quadrature channels might affect the performance of the system. In this paper, the affection of imbalances and DC offsets of I/Q demodulators to signal processing are analyzed. One method of calibrating of amplitude and phase imbalances is introduced and the result of computer simulation is given.]]></description>
<pubDate>2013/11/18 15:32:46</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Liu Guangping,Li Xiangyang,Liang Diannong and Zhou Zhimin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Liu Guangping,Li Xiangyang,Liang Diannong and Zhou Zhimin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199904016]]></guid><cfi:id>530</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Detection and Parameter Estimation of LFM Signal Embeded in Strong Interference]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199903013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[It is an important application for the detection and parameter estimation of LFM signal embeded in strong interference in radar signal processing. We have analyzed the characteristics of LFM signal embeded in strong interference, at the same time, the methods of detection and parameter estimation of LFM signal are summarized and compared in this paper. Subsequently, we investigated the detection performance and portray the ROC of WHT detector. Finally, we advance a method of restraining the strong interference, detecting and estimating the parameter of LFM signal based on WHT, and the experimental results are given.]]></description>
<pubDate>2013/11/18 15:33:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Dai Zhengjian,Yu Wenxian,Hu Weidong and Wu Jianhui]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Dai Zhengjian,Yu Wenxian,Hu Weidong and Wu Jianhui</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199903013]]></guid><cfi:id>529</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Study of Signature Extracting and Target Identification Based on Radar Target High Resolution Range Profile]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199903014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper, first, the radar target scattering centers are extracted based on TLS-ESPRIT algorithm under high resolution radar in optical region, a new target recognition algorithm so-called“correlation match algorithm by scattering center situation information”is proposed. Then, the stability of this algorithm and the no-relation characteristics of correlation match coefficient and the selected base are demonstrated. Finally, the experiment results of five aircraft models are given.]]></description>
<pubDate>2013/11/18 15:33:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Jiang Weidong,Chen Zengping and Zhuang Zhaowen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Jiang Weidong,Chen Zengping and Zhuang Zhaowen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199903014]]></guid><cfi:id>528</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Motion Compensation of Ground Rail UWB-SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200005010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The motion error of SAR will bring about phase error and affect the result of the pulse compression. In this paper, the motion error of ground rail UWB-SAR is analyzed, and the effect on azimuth pulse compression is investigated. A scheme of motion compensation is put forward in the end.]]></description>
<pubDate>2013/11/18 15:30:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHU Guofu,CHANG Wenge and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHU Guofu,CHANG Wenge and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200005010]]></guid><cfi:id>527</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Real-time Imaging Algorithm for UWB-SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200005011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Compared with usual SAR, the computational load of UWB-SAR system for imaging is larger, and the realization of real-time processing is more difficult. According to applying sub-aperture process to the BP algorithm, a practical real-time imaging algorithm (Local BP algorithm) is presented. For a SAR image area with N pixels each side, LBP algorithm can reduce the required operations, and it has a good parallel and pipelined architecture.]]></description>
<pubDate>2013/11/18 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Xiaodong and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Xiaodong and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200005011]]></guid><cfi:id>526</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Design of the Multi-Mode Modulation Module]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200005014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The design method of a multi-mode modulation module based on PCI bus is presented and realized. Its foundation on which many types of middle-frequency modulated signal are produced is the theory of orthogonal modulation and digital-up-converting. Another abstractive feature is that it connects the base-band processing unit with PCI bus so that a flexible and powerful multi-mode modulator can be made by combined this module with the general computer or commercial DSP board.]]></description>
<pubDate>2013/11/18 15:30:33</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XIN Qin<sup>1</sup>,GONG Xiangyi<sup>1</sup>,ZHOU Liangzhu<sup>1</sup> and LI Li<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIN Qin<sup>1</sup>,GONG Xiangyi<sup>1</sup>,ZHOU Liangzhu<sup>1</sup> and LI Li<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200005014]]></guid><cfi:id>525</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of Microstrip Line-fed Excitation Source of FDTD]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200005015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A novel method of microstrip line-fed excitation source is presented in this paper to analyze microstrip problems by the finite-difference time-domain method (FDTD). Unlike previous excitation treatment, which can only be used to calculate Gaussian pulse incident wave, this method can be used to calculate Gaussian pulse incident wave and harmonica incident wave. It is not necessary to switch the source wall to absorbing boundary condition in the iterative process. Because of field zone division, reflected fields naturally separated from total fields.]]></description>
<pubDate>2013/11/18 15:30:33</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YIN Jiaxian,TAN Huaiying,LIU Kecheng and MAO junjie]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YIN Jiaxian,TAN Huaiying,LIU Kecheng and MAO junjie</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200005015]]></guid><cfi:id>524</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study on Target Detection Algorithm Based on Fuzzy Fusion]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200004016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A novel fusion scheme is presented based on fuzzy sets, considering the problem of information loss resulting from local“hard” decision during the traditional decision-layer fusion process. The theoretical analysis and simulation results show that this method works better than traditional“K-rank”fusion rule, and the ROC curve approaches the optimum.]]></description>
<pubDate>2013/11/18 15:30:47</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Zhenhai,WANG Xuesong,XIAO Shunping and ZHUANG Zhaowen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Zhenhai,WANG Xuesong,XIAO Shunping and ZHUANG Zhaowen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200004016]]></guid><cfi:id>523</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Performance of Multicarrier CDMA Modulated by Using Wavelet Packet Functions]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200004017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new scheme of orthogonal multicarrier CDMA based on wavelet packet functions is proposed. Transmitted data bits are serial to parallel converted to a number of parallel sub-channels. On each sub-channel each bit is spread by PN code. Each chip on different sub-channel modulate different wavelet packet functions. Good properties of wavelet packet functions ensure that the system can suppress multipath interference,  inter-subchannel interference (ICI) and multiple access interference (MAI) effectively. The system performance is investigated for a multipath,  slow Rayleigh fading channel. The performance advantages of the system over that based on DFT are demonstrated by both analytical and simulation methods.]]></description>
<pubDate>2013/11/18 15:30:47</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Rong<sup>1</sup>,WEI Jibo<sup>2</sup> and CHENG Shixin<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Rong<sup>1</sup>,WEI Jibo<sup>2</sup> and CHENG Shixin<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200004017]]></guid><cfi:id>522</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A New Digital Method to Demodulate the WBFM Signal]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200004019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The Demodulation of WBFM(Wide-Band Frequency Modulation)signal is a typical nonlinear processing in communication. This paper introduces a new method using DSP to demodulate the WBFM signal in the digital receiver.]]></description>
<pubDate>2013/11/18 15:30:47</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HU Yanping,LI Guangsen,WU Chunguang and HUANGFU Kan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Yanping,LI Guangsen,WU Chunguang and HUANGFU Kan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200004019]]></guid><cfi:id>521</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modeling and Algorithm Analyzing for 3D Angle only Target Localization with Airborne Sensor]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200004020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In 3D angle only target localization system, the model and algorithm are important to better estimate the performance. The own-plane NED inertial reference, the own-plane body reference, and the antenna reference are introduced to model the position estimation problem with airborne sensor. Then three state equalities and four filtering algorithms are compared by simulation for choosing the best one.]]></description>
<pubDate>2013/11/18 15:30:47</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[DENG Xinpu,ZHOU Yiyu and WAN Junli]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DENG Xinpu,ZHOU Yiyu and WAN Junli</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200004020]]></guid><cfi:id>520</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[MMX Acceleration of Motion Compensation in H.263 Coder]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200004021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[We use the technology of MMX to realize the motion compensation algorithm of H.263 based on the analysis of motion compensation in the H.263 and the MMX instruction set.]]></description>
<pubDate>2013/11/18 15:30:47</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHENG Zhu,LOU Shengqiang and HUANGFU Kan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHENG Zhu,LOU Shengqiang and HUANGFU Kan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200004021]]></guid><cfi:id>519</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on the Cross-Range Resolution of Synthetic-Aperture Radar Based on Nonsinusoidal Waves]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200003003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[From the angle of a beam-forming, the cross-range focusing principle of the synthetic-aperture radar based on nonsinusoidal 
waves is studied. The expressions of antenna pattern for both rectangular signal and Gaussian signal are presented. Compared with 
the conventional narrow bandwidth SAR whose cross-rang resolution is determined by the carrier frequency, the cross-range resolution of 
the nonsinusoidal SAR is affected by the signal bandwidth.]]></description>
<pubDate>2013/11/18 15:30:58</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[FAN Yufang and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FAN Yufang and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200003003]]></guid><cfi:id>518</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Distributed Arithmetic and its Implementation in FPGA]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200003004]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The principle of distributed arithmetic and its implementation in LUT-based FPGA are introduced. The difference in area cost and performance between serial distributed arithmetic and parallel distributed arithmetic is also described.]]></description>
<pubDate>2013/11/18 15:30:58</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Dong,WANG Yuhong and LU Huangzhang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Dong,WANG Yuhong and LU Huangzhang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200003004]]></guid><cfi:id>517</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Performance Evaluation of DS-CDMA System with M-ary Orthogonal Signaling]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200003005]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[With the development of the mobile communication, the CDMA techniques has attracted more and more attention. To reduce interference, M-ary orthogonal signaling is employed. In this paper, the performance of the DS-CDMA system with M-ary orthogonal signaling is analyzed in terms of the bit error probability by analysing the statistics of the received baseband signal. .]]></description>
<pubDate>2013/11/18 15:30:58</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHU Jiang and ZHANG Eryang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHU Jiang and ZHANG Eryang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200003005]]></guid><cfi:id>516</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Access Control for Multi-class Services Based-on Single-code CDMA Systems]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200003006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new two-level scheme of access control based on a single-code CDMA system supporting multiclass traffic is proposed. By means of this scheme, the users of real-time traffic transmit their packets without incurring further delay once admitted to the system but the access of nonreal-time data users is regulated at both call level and burst level. Thus, the latter may fully utilize the residual channels without degrading the QoS of the former.]]></description>
<pubDate>2013/11/18 15:30:58</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XIAO Dengkun,ZHANG Eryang and TANG Chaojing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIAO Dengkun,ZHANG Eryang and TANG Chaojing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200003006]]></guid><cfi:id>515</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modeling and Simulation of Low Grazing Angle Radar Sea Clutter]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200003007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The model and simulation of low grazing angle sea clutter is introduced. According to the actual background, some approximate models of sea clutter have been modified. Simulation schemes are presented in detail for incoherent and coherent radar signal processing respectively. Some key problems encountered in the simulation are emphasized, and a software of simulation is realized in Visual C+ +. The results of simulation show the applicability and effectiveness of the model and the simulation scheme.]]></description>
<pubDate>2013/11/18 15:30:58</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SONG Haina,HU Weidong,YU Wenxian and WU Jianhui]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SONG Haina,HU Weidong,YU Wenxian and WU Jianhui</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200003007]]></guid><cfi:id>514</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[RFI Suppression in UWB-SAR Based on RELAX]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200002013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[We first present the parametric model of Radio Frequency Interference (RFI) suppression in Ultra-WideBand Synthetic Aperture Radar (UWB-SAR). Starting from the problem of signal parameter estimation, we deduce in detail the computation formula of RELAX algorithm for real-valued signal. As to the complexity of RFI, a Gradual RELAX (GRELAX) algorithm is proposed. Experiments with synthesized and raw RFI data demonstrate the efficiency of GRELAX in RFI suppression and its high processing speed.]]></description>
<pubDate>2013/11/18 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HUANG Xiaotao and LIANG diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HUANG Xiaotao and LIANG diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200002013]]></guid><cfi:id>513</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Measurement of the Amplitude and Phase Error of Wide Band Quadrature Demodulator]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200002014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the digital oscilloscope and vector network analyzer, two methods of the amplitude and phase error measuring of wide band quadrature demodulator are proposed and compared. They've also been verified in the measurement of a quadrature demodulator of 100MHz band.]]></description>
<pubDate>2013/11/18 15:32:04</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Xiangyang,LIU Guangping,LIANG Diannong and ZHOU Zhimin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Xiangyang,LIU Guangping,LIANG Diannong and ZHOU Zhimin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200002014]]></guid><cfi:id>512</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on the Detection Performance Improvement in All Interesting Ranges for Forward Looking  Airborne Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200001006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The STAP of the forward looking airborne radar (FLAR) is studied. A scheme is presented, which is processed by the way of STAP combined with using multiple staggered medium pulse repetition frequencies (MPRFs). In addition, the selection of PRFs is further discussed to make the scheme more available for FLAR. The performance and range/velocity blind zone of FLAR are also investigated by using 3-C approach. The experimental simulation results suggest that the scheme can improve the detection performance in all interesting ranges for FLAR.]]></description>
<pubDate>2013/11/18 15:30:12</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Jianwen<sup>1</sup>,WANG Yongliang<sup>2</sup>,HUANGFU Kan<sup>1</sup> and ZHOU Liangzhu<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Jianwen<sup>1</sup>,WANG Yongliang<sup>2</sup>,HUANGFU Kan<sup>1</sup> and ZHOU Liangzhu<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200001006]]></guid><cfi:id>511</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of Ridged Horn in Time Domain]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200001007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The impedance and radiation characteristics of ridged horn are calculated by using the FDTD method with PML absorbing boundary condition and CP method on treatment of curve PEC boundary and slot between ridges. The amplitude and phase for antenna field are given, and results show that this method is perfect.]]></description>
<pubDate>2013/11/18 15:30:12</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Peiguo,LIU Kecheng,HE Jianguo and ZHANG Guangfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Peiguo,LIU Kecheng,HE Jianguo and ZHANG Guangfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200001007]]></guid><cfi:id>510</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Calculation of Gain and Patterns for Series-fed Microstrip Arrays]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200001011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The recursion formulas of elements current for series-fed microstrip arrays are presented by applying the lossy transmission line theory. The results of gain and patterns were compared with experiment's results. The identity of both shows that it is necessary to take microstrip line's loss into account to obtain accuracy patterns. The relations between the number of microstrip array's elements and gain are also analyzed and the curve is presented.]]></description>
<pubDate>2013/11/18 15:30:12</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YIN Jiaxian and LIU Kecheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YIN Jiaxian and LIU Kecheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200001011]]></guid><cfi:id>509</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Method for Real Time Correcting the Amplitude and phase Errors of UWB Quadrature Demodulation Receivers]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200001012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper first points out the errors affecting the performance of ultra wide band quadrature demodulation receiver.Then a method for real time correcting the amplitude and phase errors of UWB quadrature demodulation receiver using 2PFIR filters is presented，according to the high speed，large data quantity of UWB. An algorithm designing the complex coefficients 2PFIR filters is alsooffered，followed by a practical example.]]></description>
<pubDate>2013/11/18 15:30:12</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LU Biying，,ZH0U Zhimin and S0NG Qian]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Biying，,ZH0U Zhimin and S0NG Qian</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200001012]]></guid><cfi:id>508</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Decoding Algorithm of Space-Time Block Codes]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200106016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Space-time block codes are code technologies which provide a new paradigm for transmit over Rayleigh fading channels using multiple antennas. The general decoding algorithm of Space-time block codes is deduced.]]></description>
<pubDate>2013/8/21 9:51:19</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Guangsen,HU Yanping and ZHOU Liangzhu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Guangsen,HU Yanping and ZHOU Liangzhu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200106016]]></guid><cfi:id>507</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Single Observer-Passive Location Technology Based on Method of Phase Difference Rate of Change]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200106017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Technology of passive location has broad prospects for application. The single observer-passive location method of phase difference rate of change is introduced based on existing methods. We can obtain the direction of the target with phase difference information of two orthogonal interferometers on the observer and the radial distance with corresponding phase difference rate of change information. Then the target can be located with high speed and precision. Some locating expressions are given when the observer is flying along a horizontal beeline without any posture change. Simulations show that this method is effective.]]></description>
<pubDate>2013/8/21 9:51:19</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SHAN Yuehui,SUN Zhongkang and HUANGFU Kan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHAN Yuehui,SUN Zhongkang and HUANGFU Kan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200106017]]></guid><cfi:id>506</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Principle, Adaptive Beamforming Algorithms,Study Status and Applications of Smart Antennas]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200106019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Smart antennas receive much attention recently in the communication field. The basic principle of smart antennas is first expounded. Then the uplink narrowband adaptive beamforming algorithms are introduced. The adaptive beamforming algorithms are classified, and the characteristic of each algorithm is discussed in detail. The study status and applications of smart antennas are described in the end.]]></description>
<pubDate>2013/8/21 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SANG HuaiSheng and LI ZhengRong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SANG HuaiSheng and LI ZhengRong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200106019]]></guid><cfi:id>505</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Effect of the Number of Radar Accumulating Data on the Accuracy of Angular Measurement with Interference of Dual Sources]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Interference of dual sources is an effective means of counteracting passive radar seeker (PRS). In the practice，the power of dual sources is hard to be the same, so it is possible for PRS to counteract interference of dual sources. In far field, PRS will not follow the power centroid and point the higher power source of double sources as long as the number of the seeker accumulating data is large enough. It is proven by theoretical analysis and simulation experiments. And the formulation of the number of the seeker accumulating data is given.]]></description>
<pubDate>2013/8/21 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LU Tongguang,JIANG Wenli,LI Dun and ZHOU Yiyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Tongguang,JIANG Wenli,LI Dun and ZHOU Yiyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105012]]></guid><cfi:id>504</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Detection of the Moving Target by Using Pulsed Doppler Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper analyzes the influence of the  inversive receiver on the chracteristics of the clutter and the ratio of the signal power and the noise power ,discusses the effective detection  method of the target signal in correlated clutter,and then puts forward a new method named multi-periods shift accumulation for detecting moving target when not knowing the exact movement parameter.]]></description>
<pubDate>2013/8/21 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Jun,FU Qiang and XIAO Huaitie]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Jun,FU Qiang and XIAO Huaitie</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105013]]></guid><cfi:id>503</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Digitally-Spotlight Algorithm for Stripmap-Mode SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The Stripmap-mode SAR is able to image larger area during the same time than the Spotlight-mode SAR. There are always some ROIs which should be emphasized in the whole SAR image. But the signature from those scatters outside the ROI will decrease the contrast of ROI's image. The digitally-spotlight algorithm is able to filter the unwanted signature before imaging to achieve the equivalent purpose to spotlight-mode SAR and increase the contrast of the SAR image. The simulation results prove its validity.]]></description>
<pubDate>2013/8/21 9:51:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[DONG Zhen,ZHU Guofu,LIANG Diannong and CHEN Hong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DONG Zhen,ZHU Guofu,LIANG Diannong and CHEN Hong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105014]]></guid><cfi:id>502</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design of Key Specifications for Airborne FOPEN UWB SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper thoroceghly analyzes the three most important factors that govern the foliage penetrat capability of UWB SAR: operational frequency, polarization and resolution. Our conclusions are of significant values to the top-level design of UWB SAR.]]></description>
<pubDate>2013/8/21 9:51:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHOU Zhimin,HUANG Xiaotao and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Zhimin,HUANG Xiaotao and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105015]]></guid><cfi:id>501</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Target Segmentation and Aspect Estimation in Synthetic Aperture Radar Imagery]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Image segmentation and target aspect estimation are very useful for automatic target recognition in SAR imagery. Based on the MRF model, we first segment the image using ICM algorithm. According to the MAP criteria, the image is segmented into target, shadow and background. Then the target pixel closest to the sensor is obtained, and we can get the primary edge and estimate the target aspect angle based on it. These algorithms are applied to SAR imagery from the MSTAR datasets, and the result is better than by other algorithms.]]></description>
<pubDate>2013/8/21 9:51:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Cui,LI Sudan and WANG Zhengzhi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Cui,LI Sudan and WANG Zhengzhi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105017]]></guid><cfi:id>500</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Calculation the Radar Cross Section of a Aircraft Carrier Based on the Plate-Element Method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The triangle-plate model of an aircraft carrier is made using 3D Studio MAX and the radar reflecting characteristics of the carrier in X band are studied. The RCS is calculated with the plate-element method. The results show that the RCS peaks appear on the prow, the stern and the two sides, which shows the radar echo is mainly caused by the mirror reflectioin.]]></description>
<pubDate>2013/8/21 9:51:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Guohua,YUAN Naichang and ZHUANG Zhaowen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Guohua,YUAN Naichang and ZHUANG Zhaowen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105018]]></guid><cfi:id>499</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Study of Target Recognition Based on RadarTarget High Resolution Range Profile]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In high frequency region,the radar range profiles are chosen as feature vectors for target recognition.The profile is seriously affected by the bearing.In order to make the radar target recognition more sffective,the definitions of correlation length and correlation angle are given.In frequency domain,the most important feature of the shape of a profile is mainly contained in its spectral phase, but not in its spectral magnitude.So the spectral phase is important feature information for RTR(Radar Target Recognition) in high frequency region,and should be utilized effectively.]]></description>
<pubDate>2013/8/21 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[MIAO Yu,JIANG Wenli and ZHOU Yiyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>MIAO Yu,JIANG Wenli and ZHOU Yiyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105021]]></guid><cfi:id>498</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Transform Domain Narrowband InterferenceSuppression Method in Hybrid DS/HF System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents two transform domain approaches to suppress the narrowband interference in a hybrid direct sequence frequency hopping spread spectrum system. Different algorithms used in determining and suppressing the interfered frequency bins are studied in detail，based on FFT frequency domain and MPWD time-frequency domain respectively. To avoid spectral leaking of the power, windowing can be performed prior to transformation. The simulated numerical results of the system bit error probability under different adaptive algorithms are provided.]]></description>
<pubDate>2013/8/21 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Shilian,WU Shuyue,LU Jun and ZHANG Eryang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Shilian,WU Shuyue,LU Jun and ZHANG Eryang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104022]]></guid><cfi:id>497</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of Detection of LPI Radar Signals Using SCF]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The SCFs of some noise, interfering and LPI radar signals are illustrated, the performance advantages of using SCF to detect LPI signals in noise or interference environments are analyzed. The SCF is also compared with Wigner-Ville distribution, dechirping and ambiguity, the equality among them is found. Moreover, several SCF algorithms are evaluated. It can be evidenced that the SCF is an efficient method of detection LPI signals, which has the good performance of resistance against the interference and the capability of realizing real time detection.]]></description>
<pubDate>2013/8/21 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HUANG Chunlin,JIANG Wenli and ZHOU Yiyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HUANG Chunlin,JIANG Wenli and ZHOU Yiyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104023]]></guid><cfi:id>496</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[SAR Image Speckle Reduction Using Iterated Structure Filters]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Kinds of synthetic aperture radar (SAR) image filter methods are studied first, their faults being pointed out. Then a kind of SAR image filter method based on annealing and iterated filter is proposed, which describes image local property by correlated neighbourhood model. At first, a series of templates reflecting direction informatio are established and every template is present for a kind of neighbour structure. Then on the basis of SAR image statistical property, the MAP estimate of the real intensity under observation image values for every structure is got by Bayes formulation. Simulated annealing algorithm is used to get proper structure from the candidate structure according their probability, the estimate value corresponding to this structure is the estimate of the underlying cross-section. Simulated annealing algorithm makes sure that the best global result can be obtained when the temperature is reduced to zero.]]></description>
<pubDate>2013/8/21 9:51:44</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Sudan,ZHANG Cui and WANG Zhengzhi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Sudan,ZHANG Cui and WANG Zhengzhi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104024]]></guid><cfi:id>495</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Parametric Model for High Frequency Complex 2-D Radar Scattering]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A 2-D Type-Discriminated Geometric Theory of Diffraction based (TD-GTD) model that discriminates between the localized and distributed scattering centers of the radar target is presented. This scattering model provides a more physical-relevant and richer description of high frequency complex scattering behavior compared with either point scattering models or prony models. To estimate the TD-GTD model parameters, Maximum Likelihood Estimation (MLE) algorithm is developed. An effective method of parameter initialization is proposed. Since estimating parameters of all scattering centers at the same time is the cause of high computational cost and complexity, RELAX technique is introduced into MLE algorithms to get around that difficulty. The efficiency and feasibility of the method is confirmed by the test based on the measured data.]]></description>
<pubDate>2013/8/21 9:51:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SUN Zhenzhen,CHEN Zengping,ZHUANG Zhaowen and GUO Guirong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SUN Zhenzhen,CHEN Zengping,ZHUANG Zhaowen and GUO Guirong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104025]]></guid><cfi:id>494</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[PBG Microstrip Lines Compatible with Circuits Integration]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The characteristics of microstrip lines supported by photonic bandgap (PBG) structures are studied. Defected ground planes have been adopted to build up novel microstrip lines. Numerical simulation based on FDTD method and experiments have been carried out。The cases of rectangular holes and a filter constructed by cascaded PBG lines have been studied. Frequency transmission curves are given, and the existence of a bandgap is proved.]]></description>
<pubDate>2013/8/21 9:51:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[FU Yunqi,YUAN Naichang and ZHANG Guohua]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FU Yunqi,YUAN Naichang and ZHANG Guohua</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104026]]></guid><cfi:id>493</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Blind Adaptive Multiuser CDMA Array Receiver]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Space-time multiuser detection based on constrained minimum output energy and its adaptive implementation are studied. This is a blind method which can suppress the multiple access interferences and solve the near-far problem without any training sequences. Furthermore, performances of the multiuser CDMA antenna array receiver are analyzed and compared with the performances of the multiuser single-antenna receiver, the single-user array receiver and the single-user single-antenna receiver.]]></description>
<pubDate>2013/8/21 9:51:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Qiang,WANG Zhan and HUANGFU Kan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Qiang,WANG Zhan and HUANGFU Kan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104027]]></guid><cfi:id>492</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Adaptive Passive Pre-Detection of Frequency-Hopping Interfered Channel]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200103016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Pre-Detection of interfered channel is absolutely necessary for FH communication. This paper presents a new method named adaptive passive pre-detection algorithm，which identifies the interfered channel easily without transmitting detect signal. This method is simple to implement and improves the system performance of anti-jamming obviously.]]></description>
<pubDate>2013/8/21 9:52:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HU Yanping,LI　Gang,CHENG　Zhu and HUANGFU Kan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Yanping,LI　Gang,CHENG　Zhu and HUANGFU Kan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200103016]]></guid><cfi:id>491</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Problem in the Measurement of Range by Phases in Noisy Circumstance]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200103017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For the problem of De-ambiguous in the measurement of range by phases under stagger relation of frequency difference, we give the condition of correctly De-ambiguous under relatively prime stagger relation and actual noisy circumstance and the proof. Then we discussed fast algorithm for De-ambiguous problem, theoretical ranging error when ranged by stagger frequency difference, and the SNR value that assure De-ambiguous reliably.]]></description>
<pubDate>2013/8/21 9:52:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Bangjian and HUANG Fukan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Bangjian and HUANG Fukan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200103017]]></guid><cfi:id>490</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modeling and Analysis of Digital GPS Code AcquisitionCircuit Based on Direct IF Sampling]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200102017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A digital GPS PN code acquisition circuit based on direct IF sampling is presented. Based on the mathematics model of this circuit, the relations between searching rate, probabilities of false-alarm, probabilities of detection and input carrier-to-noise density ratio(C/N<sub>0</sub>) are analyzed. A digital system scheme based on the acquisition circuit is proposed. According to the result of the analysis the digital acquisition circuit can be adopted for improving acquiring performance and system reliability.]]></description>
<pubDate>2013/8/21 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Hao,YONG Shaowei and ZHUANG Zhaowen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Hao,YONG Shaowei and ZHUANG Zhaowen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200102017]]></guid><cfi:id>489</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Simulating and Fixed Point Programmingof MPEG Audio LayerⅢ Decoding Algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200102020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[MP3 music format which uses MPEG audio LayerⅢ compressing algorithm is popular for its high compression rate and CD-like quality. The fixed point programming of the MPEG audio LayerⅢ decoding algorithm is implemented after being simulated with C++ language, which can be used to realize the real time decoding of MPEG audio LayerⅢ based on digital signal processor.]]></description>
<pubDate>2013/8/21 9:52:18</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Hongguang,LIN Jiayu and TANG Chaojing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Hongguang,LIN Jiayu and TANG Chaojing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200102020]]></guid><cfi:id>488</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Phase Gradient Algorithm for Phase Error Correction of UWBR System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200101012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The phase error of UWBR(Ultra<sub>_</sub>WideBand Radar) system based on LFM signal, will affect the result of the pulse compression of the radar system. The phase gradient algorithm presented in this paper can estimate the phase error of the system effectively, and improve the performance of the pulse compression.]]></description>
<pubDate>2013/8/21 9:52:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHU Guofu,DONG Zhen,CHANG Wenge and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHU Guofu,DONG Zhen,CHANG Wenge and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200101012]]></guid><cfi:id>487</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Road Network Detection in SAR Images]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200101015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Two-step algorithm is proposed for unsupervised detection of linear structure from SAR image, in particular, the road network detection. The first step is to detect line element with local detector, in this paper an improved ratio of average (RoA) detector which takes into account the inner statistic property of SAR image is proposed. It can guarantee the detection accuracy. In the second step, we introduce the prior knowledge about the road structure to group the line element into macroscopical structure. The method proposed is identified in ERS-1 image.]]></description>
<pubDate>2013/8/21 9:52:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Sudan,WANG Zhengzhi and ZHANG Cui]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Sudan,WANG Zhengzhi and ZHANG Cui</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200101015]]></guid><cfi:id>486</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Space-time Decorrelating Receivers in Multipath Fading Channels]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200101017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A general space-time CDMA system model in multipath fading channels is built to study how to suppress both multiple access interference (MAI) and multipath fading. Identification conditions are first studied. Then a FIR solution of space-time decorrelating receivers is implemented by an optimal criterion with multiple constraints and system performances are analyzed.]]></description>
<pubDate>2013/8/21 9:52:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Qiang,HU Yanping and HUANGFUKan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Qiang,HU Yanping and HUANGFUKan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200101017]]></guid><cfi:id>485</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Range-instantaneous Doppler Imaging in ISAR Based on Time-frequence]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200206009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to get the ISAR images of maneuvering targets, Fourier transformation is replaced by time-frequency transformation with high resolution in both time and frequency domains. Range-instantaneous Doppler images of maneuvering targets are got. The imaging result using real data shows that this method is better than R-D algorithms.]]></description>
<pubDate>2013/8/21 9:49:42</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HUANG Xiaohong,JIANG Weidong,QIU Zhaokun and CHEN Zengping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HUANG Xiaohong,JIANG Weidong,QIU Zhaokun and CHEN Zengping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200206009]]></guid><cfi:id>484</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Changing Scale Discrete Chirp-Fourier Transform and Its Application in Detecting Target Using Missile-borne PD Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200206010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the restriction of detecting the acclerating target using traditional DFT method,this paper is based on the discrete Chirp-Fourier transform and the real background in signal detection using missile-borne high-PRF pulsed Doppler radar.A transform naming changing scale discrete Chirp-Fourier transform is presented,and then the performance of the transform is analyzed.Finally,a new cascaded detection method is put forward for detecting the chirp signal using radar.The theoretics and the experiments demonstrates its effectiveness in performance.]]></description>
<pubDate>2013/8/21 9:49:42</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Jun,FU Qiang and CHEN Fubin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Jun,FU Qiang and CHEN Fubin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200206010]]></guid><cfi:id>483</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[TDOA Estimation Method of Cycle Stationary Communication Signal]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200206011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper studies the TDOA estimation method using the characteristics of cycle stationary communication signal.The study indicates that the TDOA estimation method based on spectral correlationl has better anti-jamming ability than the classical method of GCC,and this method can obtain the TDOA of each emitter unambiguously in the environment of multi-emitters.]]></description>
<pubDate>2013/8/21 9:49:42</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Jianxin<sup>1</sup>,YANG Lin<sup>1</sup> and ZHOU Yiyu<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Jianxin<sup>1</sup>,YANG Lin<sup>1</sup> and ZHOU Yiyu<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200206011]]></guid><cfi:id>482</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Estimation of Resolution for Impulse SAR's Imaging]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200205015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Back-projection(BP)algorithm is a popular imaging algorithm for impulse SAR. The relation between BP's azimuth resolution and azimuth angle as well as signal's center frequency is discovered when the radar's transmitted signal is one kind of impulse signal based on the characteristic of the impulse SAR imaging.The simulation results prove the estimation formula's validity.]]></description>
<pubDate>2013/8/21 9:50:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[DONG Zhen,Chang Wenge and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DONG Zhen,Chang Wenge and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200205015]]></guid><cfi:id>481</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Analysis and Calculation of the Channel Capacity for the M-ary Multidimensional Signal Sets]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200205016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper describes the general concept of the channel capacity, gives a detailed analysis of the channel capacity of the waveform channel, continuous channel and the discrete input continuous output memoryless channel, then derives their general formulae of the channel capacity respectively. Combined with several known m-ary multidimensional modulation techniques and their constellation analysis, Monte-Carlo simulation and the numerical integral simulation are given for their channel capacity. Finally the coding gain due to the signal sets expansion is analyzed.]]></description>
<pubDate>2013/8/21 9:50:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SHI Xinhua,LI Ke,ZHU Jiang and ZHANG Eryang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHI Xinhua,LI Ke,ZHU Jiang and ZHANG Eryang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200205016]]></guid><cfi:id>480</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Digital Measuring for Phase Difference of Interferometer]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200205017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[By employing the new measurement information—rate of phase difference measured by two-element antenna array (interferometer), a passive location systems can find the position of enemy emitters more quickly with higher precision. The accuracy of phase difference is critical to this passive location system. A digital method for measuring it is presented. Spectral analysis on the signals in the measuring system is given, and the signal to noise rate is calculated, then the theoretical accuracy of phase difference is derived. The accuracy is also verified by the simulation results given in the paper.]]></description>
<pubDate>2013/8/21 9:50:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[DENG Xinpu,LU Qizhong and SUN Zhongkang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DENG Xinpu,LU Qizhong and SUN Zhongkang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200205017]]></guid><cfi:id>479</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of the Asymmetrical Bandwidth Partition between Uplinkand Downlink in CDMA Cellar Mobile Communication]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200203012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Analyse the partition of bandwidth between uplink and downlink in CDMA cellar system on the basis of the inputting C/I of a receiver and the channel model presented by T. S. Rappaport and L. B. Milstein, and gives the method of the asymmetrical partition of  bandwidth. The simulation results are also presented，showing that the frequency asymmetrical partition between uplink and downlink enhances the capacity of CDMA cellar system.]]></description>
<pubDate>2013/8/21 9:50:36</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HAN Fangjing,GU Jian,CHEN Xianfu and ZHANG Eryang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HAN Fangjing,GU Jian,CHEN Xianfu and ZHANG Eryang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200203012]]></guid><cfi:id>478</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Characters of Sidelobes of M-sequences Modulated by Symbols]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200203013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The m-sequences are popularly used in radar and communication systems because of its character of uniform auto-correlation sidelobes.The sidelobes of the m-sequences are not bilevel any more when the m-sequences are modulated by the symbols.Researches reveal that the sidelobes of the m-sequences can be greatly different given the same generator polynominal but different initial phase modulation. The ratio of mainlobes to sidelobes can be increased by choosing special initial phase modulation and even more increased when the mismatched filter is adopted. The features of the matched and mismatched filters are discussed  when the inputting m-sequences are modulated by the symbols.]]></description>
<pubDate>2013/8/21 9:50:36</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Tao and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Tao and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200203013]]></guid><cfi:id>477</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Implementation of Radar Target DetectingUsing DSP in ATR System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200203014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[First, based on DSP, the hardware structure of radar target detecting system is studied. Then, the methods of radar target detecting based on DSP are presented. The experiments demonstrate that this system can work well with a variety of radar system and can implement radar target detecting automatically.]]></description>
<pubDate>2013/8/21 9:50:36</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Shuhong,JIANG Weidong,QIU Zhaokun and CHEN Zengping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Shuhong,JIANG Weidong,QIU Zhaokun and CHEN Zengping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200203014]]></guid><cfi:id>476</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A BPSK Carrier Synchronization Method Based on DSPs]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper introduces a BPSK carrier synchronization method and its performance analysis for software implementation in all digital receiverThis method is adapt to systems in which both time and memory are limited.The software methods can overcome many weaknesses of the traditional methods and is fit for implementation on Digital Signal Processors(DSPs)]]></description>
<pubDate>2013/8/21 9:50:52</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[FANG JiCheng,ZHENG Linhua and LEI Jing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FANG JiCheng,ZHENG Linhua and LEI Jing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202008]]></guid><cfi:id>475</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Study of Target Feature Extracting Method Based onLow-Resolution Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the active service low-resolution radar,the approach to target classification and recognition is studiedThe methods of target classification and recognition are proposed according to the information of target waveforms and time-spectrum.The feature extracted by target waveform is analyzed and the useful conclusion is given.The experiment result demonstrates that this recognition method is fine to classify big and small aircraft and recognize single plane and multiple planes]]></description>
<pubDate>2013/8/21 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Wei,ZHANG Hanhua,JIANG Weidong,NIE Lei and CHEN Zengping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Wei,ZHANG Hanhua,JIANG Weidong,NIE Lei and CHEN Zengping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202009]]></guid><cfi:id>474</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Directed Searching Pipeline Scheduling Algorithmfor Datapath Synthesis]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the high-level synthesis of application-specific DSP, pipeline scheduling is a difficult and urgent problem Concerning the global optimization of functional units, registers and interconnections, we present a novel algorithm called directed searching pipeline scheduling, which is an iterative algorithm utilizing heuristic information. The heuristic information speeds up the searching process, and the weakness of deterministic algorithms, which are vulnerable to trip in local optimal, poor at hill-climbing, is overcome in this algorithm. Typical design examples show that the performance of this transformation-based algorithm has reached or surpassed the best performance of pipeline scheduling algorithms reported so far.]]></description>
<pubDate>2013/8/21 9:50:52</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202010]]></guid><cfi:id>473</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Performance Analysis of Cluster Bus Interconnectionsfor Multiprocessors]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the paper,we analyze the processing efficiency of single processor in the cluster bus multiprocessors system,then we bring forward some suggestions about memory structure in the systemFinally,we compare the processing performance of cluster bus system, bus shared system and distributed bus system.]]></description>
<pubDate>2013/8/21 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LU Zaiqi,FU Qiang and ZHUANG Zhaowen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Zaiqi,FU Qiang and ZHUANG Zhaowen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202011]]></guid><cfi:id>472</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Performance Evaluation and Test of RFI Suppression Algorithmsfor UWB-SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Parametric methods are the important techniques for the implementation of Radio Frequency Interference (RFI) suppression in Ultra-WideBand Synthetic Aperture Radar (UWB-SAR). In order to evaluate the practical performance of RFI suppression algorithms, several primary algorithms are compared by the interference suppression capability and pulse compression performance. The results with real data from our experimental UWB-SAR show that parametric algorithms can greatly improve the signal-to-interference ratio. Furthermore, the algorithms based on sinusoidal model are a little better than those based on AR model.]]></description>
<pubDate>2013/8/21 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHOU Zhimin,HUANG Xiaotao,CHANG Wenge and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Zhimin,HUANG Xiaotao,CHANG Wenge and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202012]]></guid><cfi:id>471</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Analysis of the Simulation Training Model of Communication Equipment and Network]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A layered-stucture simulation training model is put forward on the basis of the characters of communication equipment and network,and the demand of communication service training.The modeling methods and program technologies of its layers are developed and analysized.And then,some simulation training systems of communication equipment and network are represented,which show that this model is easy to program,comprehend maintain and extend the system functions  for a simulation training system of communication equipment and network.]]></description>
<pubDate>2013/8/21 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HAN Fangjing,ZHENG Linhua,DING Hong and ZHANG Eryong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HAN Fangjing,ZHENG Linhua,DING Hong and ZHANG Eryong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202013]]></guid><cfi:id>470</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis and Design of mm-wave MultibeamParaboloidal Reflector Antenna]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200201015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The finite-difference time-domain method (FDTD) is used to analyze the slots feed of paraboloidal reflector antenna. The effects of feed waveguide and shape of radiation slots on feed patterns are also discussed. The paraboloidal reflector antenna patterns are presented by using physical optics, and the numerical results are compared with experimental results, and the comparison shows excellent agreement over a wide angle.]]></description>
<pubDate>2013/8/21 9:51:07</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YIN Jiaxian,LIU Kecheng,LIU peiguo and MAO junjie]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YIN Jiaxian,LIU Kecheng,LIU peiguo and MAO junjie</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200201015]]></guid><cfi:id>469</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of the Composite Scattering for Targets on the Ground]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200201016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A model called imposed excitation method for targets on the ground in time domain is described.The method comprises two steps：in the first step the scattering of the ground is calculated;in the second step the scattering of targets is calculated by imposing the scattering wave got at the first step upon the targets.A truck is involved in this paper.The scattering waves and RCS in VHF/UHF frequency are calculated.Good agreement between calculated and experimental results is obtained.It shows the effectiveness of the method.]]></description>
<pubDate>2013/8/21 9:51:07</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Peiguo<sup>1</sup>,SUN Hua<sup>2</sup>,LIU Kecheng<sup>1</sup>,YIN Jiaxian<sup>1</sup> and LIU Jibin<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Peiguo<sup>1</sup>,SUN Hua<sup>2</sup>,LIU Kecheng<sup>1</sup>,YIN Jiaxian<sup>1</sup> and LIU Jibin<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200201016]]></guid><cfi:id>468</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Analysis of Doppler Performance of the SatelliteNavigation Signal]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200305012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the satellite navigation and positioning system, Doppler shift is one of the key problems that may degrade the performance of the satellite receiver. By calculating the Doppler shift and its uncertainty in the signal covering area, the relation between Doppler shift and the position of the receiver is obtained. Quantitative analysis of Doppler uncertainty range is derived.A method for compressing Doppler uncertainty is presented.]]></description>
<pubDate>2013/6/14 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Xiaoyong,WANG Feixue and ZHUANG Zhaowen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Xiaoyong,WANG Feixue and ZHUANG Zhaowen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200305012]]></guid><cfi:id>467</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Novel Microstrip Patch Antenna and It's Analysis]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200305017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the low efficiency of the microstrip patch antenna, a novel easily-fabricated microstrip antenna is presented. The simulation and theoretical analysis is made on the antenna. The measurement of novel antenna's gain is about0.3dB higher than that of the conventional one. The new antenna is worth using owing to its easy fabrication and good qualities.]]></description>
<pubDate>2013/6/14 9:08:39</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Fengtao,YIN Jiaxian and LIU Kecheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Fengtao,YIN Jiaxian and LIU Kecheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200305017]]></guid><cfi:id>466</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Classification of the Aircraft Formation for Low ResolutionRadar Based on the Waveform Feature]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200304009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[After analyzing the echo data of aircrafts based on Low-resolution radar, this paper has defined and obtained some features of aircrafts as an input for classification by FMM neural networks. The results prove  that the features are useful to identify the size and numbers of the aircrafts formation.]]></description>
<pubDate>2013/6/14 9:08:25</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Hanhua,WANG Wei,JIANG Weidong and CHEN Zengping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Hanhua,WANG Wei,JIANG Weidong and CHEN Zengping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200304009]]></guid><cfi:id>465</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[RFI Suppression in SPR Based on MSE Criteria]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200304010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[With the appearance of radio frequency interference (RFI) in subsurface penetrating radar(SPR), this paper first analyzes the sources and properties of the RFI signal; and then based on the random property of RFI and the principle of mean square error (MSE),the wave-average filtering method in A-Scan and the median filtering method in B-Scan are discussed for RFI suppression. The performance of the two methods is demonstrated on data collected with SPR and the experimental results are also good.]]></description>
<pubDate>2013/6/14 9:08:26</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Yu,HUANG ChunLin and SU Yi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Yu,HUANG ChunLin and SU Yi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200304010]]></guid><cfi:id>464</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modeling and Simulation of the Radar Clutter forthe Phase-coded Pulse Compression Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200304011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Firstly，the phase-coded pulse compression signal is analyzed. Then the radar clutter model for phase-coded pulse compression radar is proposed based on the radar clutter model for the general pulse radar. Both the probability density characteristics and the spectral density characteristicsof the clutter signal are analyzed by Monte-Carlo method. The correlation characteristics of the clutter signal between the two range gates are also discussed. Finally，for the design of the radar environment simulator, the implementation of the clutter simulation's system is proposed by mixed means of software and hardware.]]></description>
<pubDate>2013/6/14 9:08:26</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Changlong,LOU Shengqiang and ZHOU Liangzhu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Changlong,LOU Shengqiang and ZHOU Liangzhu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200304011]]></guid><cfi:id>463</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A New Fast Algorithm for Scan Filling of the ComplexConnecting Area]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200304015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Filling algorithm of the complex connecting area is studied and a new scan line algorithm for filling area is presented. Using this algorithm, every edge pixel for judgment is labelled, then the area is filled using the scan line. This algorithm is applied not only to simple connecting area, but also to the complex area. And it is efficient, flexible, easy and exact.]]></description>
<pubDate>2013/6/14 9:08:26</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Bo,WU Qiongyu,LIU Donghua,TANG Chaojing and ZHANG Eryang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Bo,WU Qiongyu,LIU Donghua,TANG Chaojing and ZHANG Eryang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200304015]]></guid><cfi:id>462</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Performance of Power Inversion Array Using RLS Algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200303009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The high convergent speed and small steady-state misadjustment error cannot be improved simultaneously in the power inversion array when using LMS algorithm. To solve this problem, a power inversion array using RLS algorithm is proposed. The simulation result shows that, both the RLS algorithm and LMS algorithm in the power inversion array have good anti-jamming performance.Comparing to LMS algorithm, the RLS algorithm can simultaneously get high convergent speed and small steady-state misadjustment error, but it bears a burden of large computation.]]></description>
<pubDate>2013/6/14 9:08:14</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SANG Huaisheng,LI Zhengrong,WANG Feixue,Yong Shaowei and YU Wenxian]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SANG Huaisheng,LI Zhengrong,WANG Feixue,Yong Shaowei and YU Wenxian</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200303009]]></guid><cfi:id>461</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Doppler Parameters Estimation from Raw Data of an Airborne SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200303010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the airborne synthetic aperture radar system, the estimation accuracy of Doppler parameters affects the image quality directly. This paper estimates Doppler centroid using the averaged azimuth spectrum, and it estimates the Doppler frequency rate by computing the shift between sub-images. The raw data are windowed to reduce the affection of various noises in the system, and improve the estimation accuracy. Results of the algorithm can be used to compensate the phase error caused by motion error of the airborne. The method is finally verified with a set of actual experimental data.]]></description>
<pubDate>2013/6/14 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GUO Weiguang,LIANG Diannong,DONG Zhen and LIU Guangping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUO Weiguang,LIANG Diannong,DONG Zhen and LIU Guangping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200303010]]></guid><cfi:id>460</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An Algorithm Based on Wiener Filter for IR Background Suppression]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200303013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The detection problem for small targets in IR image sequences is a hot topic nowadays. In order to detect small targets in IR clutter, an algorithm based on suppressing clutter background with Wiener filter and then detecting the small targets adaptively is put forward. Experiments are done with long-range IR image sequences, and results and analyses of these results are given. The results show that this algorithm can detect small targets within the IR image sequence with SNR higher than 2.0.]]></description>
<pubDate>2013/6/14 9:08:14</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[NIE Hongshan and SHEN Zhenkang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>NIE Hongshan and SHEN Zhenkang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200303013]]></guid><cfi:id>459</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Moving Target Recognition Based on HMM]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200302012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper puts forward a recognition method based on the parameter of the moving target that the missile-borne-pulsed Doppler radar can achieve and the HMM, and then analyzes the limited performance of the method under different circumstances.]]></description>
<pubDate>2013/6/14 9:08:02</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Jun,CHEN Fubin,FU Qiang and XIAO Huaitie]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Jun,CHEN Fubin,FU Qiang and XIAO Huaitie</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200302012]]></guid><cfi:id>458</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on the Extracting  Method of the Scattering CenterFeature from SAR Imagery]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200301010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To meet the need of SAR ATR, based on attributed scattering center model, the extracting method of the scattering center feature from SAR imagery is studied. The method first extracts region including only one scattering center from SAR image by segmentation. Then, the type of the scattering center of the region is chosen. Finally, the initialized values of the parameter are selected and digital optimization is executed by the utilization of the corresponding parameter model of the scattering center, and the scattering center of the target in this region is gotten. By following theses steps repeatedly, all scattering centers of the target can be extracted. Results from simulation show that the algorithm has good estimate performance.]]></description>
<pubDate>2013/6/14 9:07:49</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[JI Kefeng,KUANG Gangyao,SU Yi and YU Wenxian]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JI Kefeng,KUANG Gangyao,SU Yi and YU Wenxian</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200301010]]></guid><cfi:id>457</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Fusion Recognition for IR Target Based on Fuzzy Integration]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200301011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For improving reliability of target recognition under the complex background and the strong clutter, a kind of algorithm for IR target fusion recognition based on the theory of fuzzy integration is presented  and some experimental simulation with the IR image data from the dual band IR imaging system is implemented. The result shows that the algorithm improves the reliability of the target recognition to some degree.]]></description>
<pubDate>2013/6/14 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Qiuhua<sup>1</sup>,LI Jicheng<sup>1</sup>,SHEN Zhenkang<sup>1</sup> and ZHU Zhenfu<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Qiuhua<sup>1</sup>,LI Jicheng<sup>1</sup>,SHEN Zhenkang<sup>1</sup> and ZHU Zhenfu<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200301011]]></guid><cfi:id>456</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An Optimal Arithmetic Unit Allocation Algorithm in the High-level Synthesis for Linear Datapath]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200301012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The arithmetic unit allocation is one of the key algorithm in the high-level synthesis. Mainly for digital signal process application, a linear regular datapath model is adopted whose main idea is to minimize the global interconnection. With the initial arithmetic unit allocation constructed by  minimal coloring algorithm，stochastic evolution is used to improve the allocation in an iterative way, minimizing the number of the data registers and the data exchanged between the process units. Experiment results with typical design example are also presented.]]></description>
<pubDate>2013/6/14 9:07:49</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[OU Gang,YONG Shaowei and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>OU Gang,YONG Shaowei and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200301012]]></guid><cfi:id>455</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Design of High-power Nanosecond Pulser Based onMicrowave PCB and Its Application]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200406009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the avalanche effect, a kind of kilo-volt nanosecond pulsers has been designed, by using microwave PCB (printed circuit board). Its trigger signal with tunable repetition rate is given by a digital circuit. The full width of the pulse is tunable between 400ps and 2ns. Its voltage ranges from 360 to 2600V. And the peak power reaches 135kW. The design of these pulsers is discussed in detail, including the circuit design, the component selection, and the important physical layout. A novel method, called deficit-charge method, and a comb PCB layout are brought forward, aiming at solving the special problems caused by the high-power butultra-narrow pulser. Being used in the impulse radar test system, the circuit performance is excellent and stable.]]></description>
<pubDate>2013/5/8 10:45:33</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIANG Buge,ZHU Chang,ZHANG Guangfu and YUAN Naichang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIANG Buge,ZHU Chang,ZHANG Guangfu and YUAN Naichang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200406009]]></guid><cfi:id>454</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Searching Algorithm for Alignment Automation between aLaser Diode and a Single-mode Fiber]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200406010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The five-dimension searching algorithm is presented for the alignment automation between a laser diode and a single-mode fiber. The searching path and the parameters are discussed in detail. The novel exponential function approximation algorithm for XY plane searching is also presented first. The experimental results with these algorithms are finally presented. It is confirmed that the searching efficiency of the exponential function approximation algorithm is better than the hill-climbing algorithm. The main reason is that the sample points are reduced. Thus the alignment speed is improved notably.]]></description>
<pubDate>2013/5/8 10:45:33</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHUN Jing,WU Yulie,DAI Yifan and LI Shengyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHUN Jing,WU Yulie,DAI Yifan and LI Shengyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200406010]]></guid><cfi:id>453</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Radiometric Calibration of Low Frequency UWBR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200406013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Regular radiometric calibration techniques developed for high frequency narrow band radar system are not applicable for low frequency ultra-wideband radar (UWBR). The low frequency scattering model is calculated using method of moment (MOM) and asymptotic waveform evaluation (AWE) technique, and the calibration method is proposed. Computer simulation is used to verify the validity of this calibration method.]]></description>
<pubDate>2013/5/8 10:45:34</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZOU Kun,LIANG Diannong and DONG Zhen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZOU Kun,LIANG Diannong and DONG Zhen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200406013]]></guid><cfi:id>452</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Calculation of the Radar Cross Section of Targets Based onTriangular Object Model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200406016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A useful method for calculating RCS of complex objects is given. First, it models the armored car with triangular element by using 3D Studio Max. Radar scattering character is calculated with Ludwig's integration and the physics theory of diffraction. The method is effective validated by calculating RCS of the cuboids. The radar cross section of armored cars and tanks is presented, which is important in studying  scattering characters of the targets.]]></description>
<pubDate>2013/5/8 10:45:34</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HUANG Jijun,SU Yi and YU Wenxian]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HUANG Jijun,SU Yi and YU Wenxian</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200406016]]></guid><cfi:id>451</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis and Simulation of the Principle of Antimultipathin the OFDM System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200405009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The OFDM system has a very good performance on antimultipath. We illustrate the principle of antimultipath and analyze the impact of the multipath channel on an OFDM signal spectrum in two cases. Then we discuss the algorithms to reduce it. In a two-path channel, we simulate the OFDM system based on HiperLAN Type2 PHY protocol and analyze its performance. In the end, we offere some proposals for improving the performance of the system.]]></description>
<pubDate>2013/5/3 9:19:52</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Ying and WEI Jibo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Ying and WEI Jibo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200405009]]></guid><cfi:id>450</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Background Estimation and the Infrared Small Target DetectionBased on RBF Neural Network]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200405010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Using the function approximation characteristic of RBF-neural network, a new algorithm of estimating the background is proposed. Based this algorithm, a new means to detect the infrared small target is found. Here, two kinds of infrared images, one with a small target in it and the other without the  target, are tested in the simulated experiments. The result of the experiments proves the good performance of the proposed algorithm.]]></description>
<pubDate>2013/5/3 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Yan,SHEN Zhenkang and WANG Ping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Yan,SHEN Zhenkang and WANG Ping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200405010]]></guid><cfi:id>449</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Estimation of Mass-to-drag Ratio of Reentry Objects]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200405011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The key problem for reentry vehicle (RV) discrimination during the reentry phase is to estimate the  mass-to-drag ratio of RV precisely and rapidly. Aiming at the nonlinear characteristic of reentry process, three filters：as spline Kalman filter, extended Kalman filter and a new extended Kalman filter based on “unscented transform” are studied. The comparison of estimating performance for these filters are provided through simulating experiment with terms of estimating precision and converging speed. Experimental results show that the new EKF based on “unscented transform” has the best performance on the estimation of mass-to-drag ratio.]]></description>
<pubDate>2013/5/3 9:19:52</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[JIN Wenbin,LIU Yongxiang,LI Xiang and REN Shuangqiao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIN Wenbin,LIU Yongxiang,LI Xiang and REN Shuangqiao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200405011]]></guid><cfi:id>448</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Radar Target Discrimination in the Missile Defense System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200404002]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The technology of the radar discriminating ballistic missile is analyzed so as to evaluate the discrimination capability of ground-based radars in the US National Missile Defense (NMD). According to the characteristics of the ballistic target clusters during the mid-course and re-entry phase, an integrative discrimination strategy for the missile defense system is developed which involves the structure, stance and re-entry characteristics of the target, and each discrimination measure is followed by technical evaluation.]]></description>
<pubDate>2013/4/27 3:07:22</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Yongxiang,LI Xiang and ZHUANG Zhaowen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Yongxiang,LI Xiang and ZHUANG Zhaowen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200404002]]></guid><cfi:id>447</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design and Implementation of Satellite-based DS/PMDual-mode Transponder]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200404007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The paper introduces the configuration, function, principles and main technical index of the satellite-based direct sequence spread spectrum/phase modulation(DS/PM)dual-mode transponder. An accurate demodulation phase method is presented in PM mode. Obviously the processing precision in PM mode is improved and the capturing bandwidth widened by this means. Some key means are also developed such as capturing the initial phase of Pseudo Noise Code in spread-spectrum mode in the environment of dynamic changes and low SNR, and  synchronizing the carrier wave with large Doppler frequency shift. All these ideas and methods are very valuable in developing space technology.]]></description>
<pubDate>2013/4/27 3:07:23</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHENG Linhua,YUAN Jibing and LI Xing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHENG Linhua,YUAN Jibing and LI Xing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200404007]]></guid><cfi:id>446</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Joint Spectrum Estimation of Polarizational and Spatial Domains]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200403014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The notion of joint spectrum in polarizational and spatial domains is proposed for the first time, which can depict the EM signal completely. Based on the polarization sensitive array, the joint spectrum is defined and its analytic function is presented by using MUSIC method. The estimation accuracy and resolving power are investigated to measure the performance of joint spectrum. The Cramer-Rao Bound (CRB) is used to evaluate the accuracy of the estimated direction of the arrival and polarization angle. The ambiguity function and ambiguity area are used to evaluate the resolving power in polarizational and spatial domains. The simulations verify the superiority of the joint spectrum and coincide with the theoretical analysis.]]></description>
<pubDate>2013/4/27 3:07:06</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Zhenhai,WANG Xuesong,XIAO Shunping and ZHUANG Zhaowen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Zhenhai,WANG Xuesong,XIAO Shunping and ZHUANG Zhaowen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200403014]]></guid><cfi:id>445</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of Spatial Resolution for Spaceborne Parasitic SAR System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200403017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the framework of spaceborne parasitic SAR system and considering spacebornebi-staticSAR configuration formed by the existing satellite and eachmicro-satellite, a geometrical model is established, and formulations of spatial resolution in range and in azimuth are deduced. Finally varieties of the spatial resolution in range and in azimuth along with the angle of incidence, height of the relative orbit and the range between the existing satellite andmicro-satellite are simulated and analyzed. The results indicate: (1) the spatial resolution in range and in azimuth are very similar to the existing satellite's； (2) the range between the existing satellite andmicro-satellite is longer, the spatial resolution is bigger； (3) the height of the relative orbit is greater, the differences of spatial resolutions of eachmicro-satellite are bigger.]]></description>
<pubDate>2013/4/27 3:07:05</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Jianping,LIANG Diannong and HE Feng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Jianping,LIANG Diannong and HE Feng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200403017]]></guid><cfi:id>444</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Polarization Discrimination Algorithm of ActiveDecoy and Radar Target]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200403018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The discrimination problem of the active decoy and radar target is studied based on the full polarization measurement radar system in. Firstly, the polarization characteristic of the active decoy is analyzed under the condition of which antenna polarizations are circular polarization and linear polarization. Then, some polarization scattering properties of the radar target are also discussed. The co-polarization and cross-polarization ratio and its characteristics are presented, which can effectively of the polarization characteristic difference between the active decoy and radar target. A novel polarization discrimination proposal of the active decoy and radar target is given. Finally，the feasibility and validity of the discrimination proposal are verified by computer simulation and actual measured data.]]></description>
<pubDate>2013/4/27 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Yongzhen,WANG Xuesong,WANG Tao,XIAO Shunping and ZHUANG Zhaowen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Yongzhen,WANG Xuesong,WANG Tao,XIAO Shunping and ZHUANG Zhaowen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200403018]]></guid><cfi:id>443</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Road Extraction from the High-resolution SAR ImageryUsing Hough Transform]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200401012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Extraction of roads from the high-resolution SAR imagery is described. The method employs Hough Transform to identify roads, followed by a series of pre-processes. Gaussian probability iteration method instead of usually used CFAR detector or threshold segmentation is employed to identify the regions of interest. The generally used Hough Transform is replaced by the average Hough Transform. The peak values in the transform area are detected by a maximum search integrating global CFAR detector. Finally, a unique geometric constraint is used to discriminate the potential roads. High-resolution SAR images of MSTAR Redstone are used to illustrate our method, and the performance is satisfactory.]]></description>
<pubDate>2013/4/22 10:35:30</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[JIA Chengli,KUANG Gangyao and SU Yi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIA Chengli,KUANG Gangyao and SU Yi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200401012]]></guid><cfi:id>442</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Airborne SAR Motion Compensation Based on RD Algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200401013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper analyzes how the trajectory deviations in the airborne synthetic aperture radar (SAR) can affect the received data. It shows that the range error can be separated into space invariant and variant contributions, which can be compensated by the first-order and second-order motion compensation processing. To realize high resolution SAR image, this paper represents a motion compensation method integrated in range-doppler (RD) algorithm. Finally, the analysis and scheme are validated by the results on simulated data.]]></description>
<pubDate>2013/4/22 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GUO Weiguang,LIU Guangping,DONG Zhen and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUO Weiguang,LIU Guangping,DONG Zhen and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200401013]]></guid><cfi:id>441</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A New Single Observer Passive Location and TrackingTechnology and Its Observability Analysis]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200401016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The observability problem of the passive location system utilizing the radial acceleration information of the emitter is analyzed. It is proved that the range and speed information of the emitter can be determined from the radial acceleration under certain conditions, so a new target motion analytical technology using bearing and radial acceleration measures is deduced. The observability conditions for this technology are analyzed and verified with the computer simulation.]]></description>
<pubDate>2013/4/22 10:35:30</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[FENG Daowang,LI Zonghua,ZHOU Yiyu and SUN Zhongkang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FENG Daowang,LI Zonghua,ZHOU Yiyu and SUN Zhongkang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200401016]]></guid><cfi:id>440</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Frequency-agility Monopulse Radar Angular GlintSuppressing Technology Based on ABA Processingand Amplitude Weighting Method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200506013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Frequency-agility amplitude weighting method is a common one to suppress the angular glint. The amplitude weighting method based on ABA (amplitude-based angle) processing is developed to suppress the angular glint. Firstly, the single pulse angle measuring result is restricted to certain extent. Then the amplitude weighting method is applied to each pulse's result. Computer simulation proves that this new method is much better to the common amplitude weighting method in suppressing the angular glint under all kinds of SNR conditions.]]></description>
<pubDate>2013/4/10 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Baoguo<sup>1</sup>,XIAO Huaitie<sup>1</sup>,FU Qiang<sup>1</sup> and LIU Yihe<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Baoguo<sup>1</sup>,XIAO Huaitie<sup>1</sup>,FU Qiang<sup>1</sup> and LIU Yihe<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200506013]]></guid><cfi:id>439</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Simulations of Scattering by the Objects Buried in LossyMedia Using TSNU-PSTD Algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200506019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A technique based on the combination of Fourier pseudospectral time-domain method (PSTD) and PML absorbing boundary conditions is widely used to simulate the scattering and propagation problems. However, one of the known disadvantages of this method is that it requires a uniformly distributed spatial grid-set along each orthogonal direction. But its accuracy is lower when applied to the objects involving the curved boundary or thein dimensions are not commensurate with the cell size. The PSTD method involving space transformations (TSNU-PSTD) alleviates this limitation. The CFS-PML is implemented in the PSTD and the TSNU-PSTD algorithm combined with the CFS-PML has been applied to model ground-penetrating radar (GPR) application involving objects in a large-scale lossy half space, and the results are compared with the FDTD. Numerical simulations show that it can achieve a satisfactory result with a grid density of only 3.0 nodes per minimum wavelength, and can simulate the scattering of curved objects in large-scale lossy media efficaciously]]></description>
<pubDate>2013/4/10 9:23:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[JIANG Yongjin,LIU Liye,YANG Hu and MAO Junjie]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIANG Yongjin,LIU Liye,YANG Hu and MAO Junjie</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200506019]]></guid><cfi:id>438</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on a Kind of Communication Technical Architectureof Code-hopping DSSS]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200505011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on some limitations of the traditional DSSS in military communication application, this paper puts forward a new kind of communication technical architecture of code-hopping DSSS and code-hopping/frequency-hopping mixed spread spectrum.It will probably solve some difficult problems in traditional DS/SS and improve the anti-reconnaissance capability.of the DSSS communication system in military communication application.]]></description>
<pubDate>2013/4/8 11:10:34</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YAO Fuqiang and ZHANG Shaoyuan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YAO Fuqiang and ZHANG Shaoyuan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200505011]]></guid><cfi:id>437</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Study of SAR Deceptive Scene Jamming Technique Based onBistatic Location]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200504013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the signal form and the gererating method of  the deceptive scene jamming for spaceborne SAR system. This paper proposes the method of jamming based on bistatic location. This method first uses bistatic passive detectors to locate the jammed radar, then smoothes the track and produces jamming signal. It provides accurate position info of the jammed radar, eliminates the effect of random location error on imaging. The bound of location error and its effect on jamming result are studied, so the important problem in implementation of the deceptive scene jamming technique is resolved. The simulation result shows that this method can provide effective jamming.]]></description>
<pubDate>2013/4/8 11:10:21</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Wei,LIANG Diannong and DONG Zhen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Wei,LIANG Diannong and DONG Zhen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200504013]]></guid><cfi:id>436</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on the Algorithm of Interval DWT Domain FLPand Its Application in SINS]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200504014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The paper deals with the effects of the angle random walk and engine jamming on SINS alignment. An algorithm is proposed which is based on the interval wavelet transform and forward linear prediction. The algorithm uses forward linear prediction and the ability of the interval wavelet transform to restrain terrible edge effects, thus, the angle walk and engine jamming are reduced effectively. The results prove the feasibility of the method.]]></description>
<pubDate>2013/4/8 11:10:22</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SHI Wei and HE Hangen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHI Wei and HE Hangen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200504014]]></guid><cfi:id>435</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[FPGA-based Implementation of the Fixed-point LMS Algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200504015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[FPGA-based implementation of LMS algorithm is one of the key techniques in the application of adaptive array antennas. This paper proposes a method for implementing the fixed-point LMS algorithm based on FPGA . On the premise of satisfying the real-time quality of the system, it's comparatively easy to implement the method, and the precision and dynamic range of the algorithm can be ensured definitely. Finally, the simulation results show that this method is feasible.]]></description>
<pubDate>2013/4/8 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHU Liang<sup>1</sup>,HAN Fangjing<sup>1</sup>,ZHANG Eryang<sup>1</sup> and CHEN Guoliang<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHU Liang<sup>1</sup>,HAN Fangjing<sup>1</sup>,ZHANG Eryang<sup>1</sup> and CHEN Guoliang<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200504015]]></guid><cfi:id>434</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Analysis and Estimation of the Ranging Bias in LFM Pulsed Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200504016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The problem of LFM pulsed radar's ranging bias due to the range-Doppler coupling is studied. The mechanism of the ranging bias is derived and analyzed. The nolinear residue of the bias neglected by most researchers is pointed out emphatically. And the relationship between this residue and the parameters of the radar waveforms and target motion is analyzed. An unconstrained optimization algorithms is proposed for the estimation of the bias residue. At last, experimental results prove the analytic conclusion and estimation algorithm are correct.]]></description>
<pubDate>2013/4/8 11:10:22</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SHI Longfei,LI Dun,WANG Xuesong and XIAO Shunping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHI Longfei,LI Dun,WANG Xuesong and XIAO Shunping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200504016]]></guid><cfi:id>433</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Radar Association Algorithm in the Electronic Counter System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200504019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Radar association is a key issue of the electronic counter system now because it can reduce the false and repeat the radar. We present a new radar association method which combines the laws of the occurence of the radar signal and the distribution of the radar feature parameter. The method can recognize all kinds of radar radiating source quickly and accurately. The results of test indicate that the method is effective.]]></description>
<pubDate>2013/4/8 11:10:22</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Guozhu,HUANG Kesheng,JIANG Wenli and ZHOU Yiyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Guozhu,HUANG Kesheng,JIANG Wenli and ZHOU Yiyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200504019]]></guid><cfi:id>432</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Formation Design Approach of the Distributed Spaceborne InSARBased on Height-measure Optimal Accuracy Value]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200504020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The formation configuration design of the distributed spaceborne interferometric SAR (DSInSAR) is the key issue of the system design. The system performance optimization and formation flying orbit dynamic characteristic are its two basic restrictions. The DSInSAR has the characteristic of bistatic, squint and spatial baseline. As an example, a master transmitter satellite and multi receiver satellite system is analysized. The relation of height-measure accuracy and baseline vector is established. The relation between the differences of the two satellite orbit roots and baseline vector is set up too. So the baseline vector can be expressed by root difference. A formation designing rule that optimal height-measure accuracy can be acquired in the middle time of the system working is presented. Base on this rule, a design method of the two satellite and multi-satellite formation is presented. Simulation shows that the height-measure accuracy value of the optimal formation configuration is prior to that of interferometric cartwheel and pendulum.]]></description>
<pubDate>2013/4/8 11:10:22</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HUANG Haifeng,DENG Yong and LIANG Dianlong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HUANG Haifeng,DENG Yong and LIANG Dianlong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200504020]]></guid><cfi:id>431</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Analysis of Geometric Accuracy of the Interferometric SyntheticAperture Radar Measuring Based on Direct Algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200504021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The direct algorithm of interferometric synthetic aperture radar measuring is to directly introduce the  absolute phase difference into range equation and Doppler equation to resolve the ground coordinates. By using the ideal image coordinate, absolute phase difference and orbital position of InSAR which include reasonable errors as the  initial data, we can get the ground coordinates which include the errors and realize the analysis of geometric accuracy of the ground coordinates. In order to introduce the errors of the baseline length and attitude into orbital position, we propose the corresponding mathematical model. The computation results show that the accuracy of direct algorithm is almost the same as that of the classical algorithm.]]></description>
<pubDate>2013/4/8 11:10:22</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHANG Benyi and WANG Yanan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHANG Benyi and WANG Yanan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200504021]]></guid><cfi:id>430</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A CFAR Detection Method in the Sea Clutter]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200503012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A novel biparametric OS-CFAR(BOS-CFAR) detection method for AEW radar in the sea clutter is proposed.The performance is discussed and analyzed for multiple-pulse noncoherent integration when this method operates in the multiple-target environment in the non-Gaussian sea  clutter background. Theoretical analysis and simulation result show that the proposed method can enhance the CFAR detection performance for AEW radar in the sea clutter background effectively.]]></description>
<pubDate>2013/4/8 11:09:49</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[DU Pengfei<sup>1,2</sup> and WANG Yongliang<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DU Pengfei<sup>1,2</sup> and WANG Yongliang<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200503012]]></guid><cfi:id>429</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Estimation of the Directions of Arrival of DistributedSources in Array Processing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200503015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Most of the existing methods of high resolution direction estimation rely on the assumption that the signals are from point sources. Thus, the application of the conventional estimation methods to the distributed sources will show grave deterioration in performance. A new model is constructed for the distributed sources, and an estimation method named DIS-MUSIC proposed. The performance of this method is analyzed and computer simulation results show that DIS-MUSIC is of much better performance than MUSIC algorithm.]]></description>
<pubDate>2013/4/8 11:09:49</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Hongguang,WANG Shixi and SHEN Zhenkang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Hongguang,WANG Shixi and SHEN Zhenkang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200503015]]></guid><cfi:id>428</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Analysis of Signal Model and Performance for SpaceborneParasitic Insar Relative Height Measurement]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200503016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the radar image model of spaceborne parasitic SAR system, interferometric model of this new system is proposed; new characters and limits are analyzed in detail. The concepts of the range and azimuth effective baseline are given at the same time. The limits of effective baselines and performance of INSAR relative height measurement of Cartwheel and Pendulum configuration are analyzed. The influence of interrelation of the range and azimuth baseline and pre-filtering technology are pointed out.]]></description>
<pubDate>2013/4/8 11:09:49</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HE Feng,LIANG Diannong and LIU Jianping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HE Feng,LIANG Diannong and LIU Jianping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200503016]]></guid><cfi:id>427</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Classification of the Aircraft Formation Based onLow-resolution Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200502008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A method named MTMM for classification of the aircraft formation is proposed, followed by studying the narrow-band signal with amplitude and phase. The results based on simulated data and measured data prove that it is a helpful method to classify the number of the airborne targets for low-resolution radar.]]></description>
<pubDate>2013/3/25 4:57:39</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Hanhua,WANG Wei,CHEN Zengping and Zhuang Zhaowen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Hanhua,WANG Wei,CHEN Zengping and Zhuang Zhaowen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200502008]]></guid><cfi:id>426</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Fast Multipole Method for Electromagnetic Scattering ofa Groove in a Perfectly Conducting Plane]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200502010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The fast multipole method is applied for calculating the radar cross section of a groove in a perfectly conducting plane. The coupled integral equations for the induced currents of a groove in a perfect conducting plane are obtained in terms of equivalent principle, and  solved by using CGM and current iteration method, FMM is employed to speed up the matrix-vector multiplication. After FMM acceleration, both the computing time and memory needs are reduced from O(N<sup>2</sup>) to O(N<sup>1.5</sup>) without increasing the complexity of implementation. Some examples are calculated, the numerical results are in perfect agreement with the MOM result.]]></description>
<pubDate>2013/3/25 4:57:42</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Lijun,LIN Baoqin and YUAN Naichang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Lijun,LIN Baoqin and YUAN Naichang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200502010]]></guid><cfi:id>425</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Polarimetric Calibration for Low Frequency UWB SARBased on the Echo Domain]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200502015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Multi-polarization, low frequency ultra-wideband synthetic aperture radar (UWB SAR) is one of the most important aspects of the radar technology. The low frequency, UWB and large processing angle result that the common SAR polarimetric calibration cannot be used. In this paper, with the system echo model, considered the electromagnetic scattering characteristics of the reference calibrator, the polarimetric calibration for the system is proposed. The computer simulation is used to validate the method.]]></description>
<pubDate>2013/3/25 4:57:46</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZOU Kun and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZOU Kun and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200502015]]></guid><cfi:id>424</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Detection Algorithm of the Ship Wakes from SAR ImageryBased on the Peak Morphological Information]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200502019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The linear characteristics of the ship wakes in SAR image is analyzed. Due to the fact that there are many factors which can generate the linear features, so aiming at the problem of the uncertainty in detecting the ship wake peaks in the Radon transform domain, an algorithm based on the peak morphological information to detect the ship wakes in SAR ocean imagery is proposed. The algorithm extracts all possible peaks by thresholding the Radon coefficients, and perform the continuous wavelet transform to the peak match for all these 1-dimensional local peak sections, and makes decision in the feature space finally using the decision vectors formed by the extracted parameters. The simulation and real data processing results show that the algorithm is reliable and can efficiently improve the accuracy of detection.]]></description>
<pubDate>2013/3/25 4:57:51</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZOU Huanxin,YU Wenxian,KUANG Gangyao and ZHENG Jian]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZOU Huanxin,YU Wenxian,KUANG Gangyao and ZHENG Jian</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200502019]]></guid><cfi:id>423</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of the Time-domain Antenna OperatingAdjacent to the Ground]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200501012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Carrier-free GPR(Ground-penetrating Radar) is a near-ground-time-domain detecting system using nanosecond pulse, influenced by half-infinite lossy media interface, therefore the analysis of scattering features of the near ground time-domain antenna is extremely difficult. This paper designs a bow-tie antenna loaded with patch resistors. Results of FDTD (Finite-difference Time-domain) calculation show good fidelity of the wave, and exciting radiation features as  well as fine effect of shielding. It can be widely used in GPR and other UWB (Ultra-wide-band) systems.]]></description>
<pubDate>2013/3/25 4:48:30</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHOU Weihong,LIU Peiguo and HE Jianguo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Weihong,LIU Peiguo and HE Jianguo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200501012]]></guid><cfi:id>422</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Trunk Clutter Suppression in FOPEN UWBSAR ImagesBased on HMM]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200501017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[When detecting man made targets hidden in foliage in a FOPEN UWBSAR image, trunk clutter is the primary disturbance. Whether the detection can be performed successfully or not is dependent on the performance of the trunk clutter suppression. Based on Hidden Markov Modeling, a new trunk clutter recognition and suppression method is proposed. From the experiments results, the recognition method proposed in this paper can recognize the trunk clutter in UWBSAR image effectively, and improve the target detection performance in foliage.]]></description>
<pubDate>2013/3/25 4:48:36</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[FANG Xueli,LIANG Diannong and DONG Zhen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FANG Xueli,LIANG Diannong and DONG Zhen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200501017]]></guid><cfi:id>421</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Exponential Distribution-based Research on NarrowbandInterference Suppression in DSSS Communication Systems]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200501018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Under the condition that only the direct sequence spread spectrum signal and additive Gaussian noise are present at the receiver, the square of amplitude of received signal after DFT is assumed to be exponentially distributed. Based on this assumption, a novel narrowband interference detection and suppression algorithm is proposed. Theoretical analysis and simulation results demonstrate that the algorithm can suppress multi tone jamming and narrowband Gaussian jamming efficiently.]]></description>
<pubDate>2013/3/25 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Chunhai,GAO Kai and ZHANG Eryang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Chunhai,GAO Kai and ZHANG Eryang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200501018]]></guid><cfi:id>420</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[LAPCA-A Distributed Location Aided Power Control Algorithm forTactical Mobile Ad Hoc Networks]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200501019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To improve the throughput of the tactical Ad Hoc networks, a distributed Location Aided Power Control Algorithm (LAPCA) is developed which computes the number of the neighboring nodes by location prediction, then adjusts transmitting power of the node to maintain an optimal connectivity when nodes are in motion. This algorithm can work as an independent module in company with most of the popular routing protocols. The Reference Point Group Mobility (RPGM) model, which is more suitable for tactical scenarios, is used to generate network simulation scenarios. As shown by the results of simulation, the throughput of the network in almost all the RPGM scenarios can be thus greatly improved with respect to the pure AODV routing protocol.]]></description>
<pubDate>2013/3/25 4:48:37</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[JIANG Yuanlong,WANG Shilian and ZHANG Eryang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIANG Yuanlong,WANG Shilian and ZHANG Eryang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200501019]]></guid><cfi:id>419</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Fast Acquisition Technology of Received Signal of DS/PMDual-mode Transponder]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200606015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A fast recognition and acquisition algorithm of the received signal of the satellite-based direct sequence spread spectrum/phase modulation(DS/PM) dual-mode transponder is put forward and the performance of the algorithm is analyzed. Compared with the traditional method, the algorithm improves the system performance, optimizes the system structure and reduces size of the hardware requirements by multiplexing the common processing unit(FFT/IFFT). The contradiction between the acquisition speed and detection performance with the high dynamic, low SNR and large Doppler shift is resolved. This research will be useful to the development of DS/PM dual-mode transponder.]]></description>
<pubDate>2013/3/14 10:39:54</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YUAN Jibing,WANG Zuliang and ZHENG Linhua]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YUAN Jibing,WANG Zuliang and ZHENG Linhua</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200606015]]></guid><cfi:id>418</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analyze Time Domain Planar TEM Horn Antenna ArrayBased on FDTD]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200604012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[FDTD was used to make simulated analysis of the time domain antenna array. Patterns in H plane were measured through outdoor oscillograph. The results indicate that the array can be used in the practical UWB radar antenna arrays, which can increase the gain, the directionality and have wide beam width.]]></description>
<pubDate>2013/3/25 4:46:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Fengtao,ZHANG Guangfu,ZHANG Weijun,JIAO Guodong,LIANG Buge and YUANG Naichang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Fengtao,ZHANG Guangfu,ZHANG Weijun,JIAO Guodong,LIANG Buge and YUANG Naichang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200604012]]></guid><cfi:id>417</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis and Design of Time-domain TEM Horn Antenna]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200604013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[TEM Horn is an ultra-wide-band antenna, which is usually employed in the analysis of frequency domain up to the present. A new concept is presented with wave mode theory. According to this concept, the impedance of antenna aperture cannot be regarded as the wave impedance in vacuum, but is connected with antenna size and flare angle. Because of the time sequence, the reflection is only connected with local structure. A TEM horn antenna is designed and fabricated. The experiment results show that its wave fidelity and impedance performance are excellent, so it is very valuable for the study of time-domain antenna.]]></description>
<pubDate>2013/3/25 4:46:05</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHOU Weihong,LIU Peiguo,HE Jianguo and Li Gaosheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Weihong,LIU Peiguo,HE Jianguo and Li Gaosheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200604013]]></guid><cfi:id>416</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study of Adaptive Anti-jamming Filtering Schemes forDS-MSK Digitalized Receiver]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200604020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The application of adaptive anti-jamming filtering in DS-MSK digitalized receiver is discussed in this paper. A novel structure named partly despread nonlinear filtering (PDNF) is proposed. It is developed from classic nonlinear filtering (NF). Fast refreshed subband adaptive filtering (FRSAF) algorithm is applied to PDNF structure to speed up convergence rate. This novel adaptive anti-jamming filtering scheme composed of PDNF structure and FRSAF algorithm outperforms the classic scheme composed of NF structure and LMS algorithm on convergence rate, robustness and output SINR. Simulation results demonstrated the efficacy of the novel scheme.]]></description>
<pubDate>2013/3/25 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LU Shujun,WANG Shilian and ZHANG Eryang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Shujun,WANG Shilian and ZHANG Eryang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200604020]]></guid><cfi:id>415</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of Beam Synchronization for Spaceborne ParasiticRadar System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200602012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Beam synchronization is one of synchronizations for spaceborne parasitic radar system, and this paper mainly analyzes this problem. Firstly, based on characteristics of spaceborne parasitic radar system and combined with scannable antenna and adjustable attitude of micro-satellite, three methods for beam pointing synchronization were presented. Then, beam area synchronization was analyzed, the models of beam area for the transmitting satellite and micro-satellites were established. Finally, the simulation of interferometric cartwheel as an example not only proves that these models are valid, but also indicates that the second method for beam pointing synchronization is much better.]]></description>
<pubDate>2013/3/14 10:38:34</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Jianping and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Jianping and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200602012]]></guid><cfi:id>414</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Ambiguity in Spaceborne Bistatic SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200602018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new method for evaluation of ambiguity-to-signal ratio in spaceborne bistatic SAR was proposed in terms of bistatic geometry. Based on that, the ASR of the new system was analyzed in different cases. Simulation results show that due to the limited size of antenna onboard small satellite, the ASR of bistatic SAR is much higher than that of monostatic spaceborne SAR, though their changing trends are similar. Compared with the ASR in azimuth, the ASR in range is closer to that of the monostatic case because the size in height dimension of small antenna is closer to that of the big antenna than the length dimension is.]]></description>
<pubDate>2013/3/14 10:38:34</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HE Feng,LIANG Diannong and DONG Zhen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HE Feng,LIANG Diannong and DONG Zhen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200602018]]></guid><cfi:id>413</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of Frequency Synchronization Error in SpaceborneParasitic SAR System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200602019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the spaceborne parasitic SAR earth observation application, the author aimed to analyse the influence of the frequency synchronization error to the bistatic SAR imaging. The “interferometric cartwheel” configuration was employed as an example, to make computer simulation of the synchronization error. Therefore, a novel frequency synchronization method was presented. This method acquires the frequency synchronization error by the correlation processing to the “direct signal” which leaked from the SAR antenna side lobe. The simulation results indicate this new synchronization method is accurate and effective.]]></description>
<pubDate>2013/3/14 10:38:34</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Yongsheng,LIANG Diannong and DONG Zhen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Yongsheng,LIANG Diannong and DONG Zhen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200602019]]></guid><cfi:id>412</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[MMW Wide-band RCS Automatic Measurement Based onUSB Interface]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200601007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on USB interface, the automatic measurement of MMW wide-band RCS was studied by using MMW vector network analyzer. This paper first introduced the design of the hardware system and the program of 82357A interface. Then it elaborated the design of the automatic measurement software, and the RCS measurement error correcting algorithms. Finally, the measurement experiments of background and target were performed and some of the measurement results were presented as illustration.]]></description>
<pubDate>2013/3/25 4:43:37</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XIAO Huaitie,GUO Xiuhuang,FU Qiang and GUO Lei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIAO Huaitie,GUO Xiuhuang,FU Qiang and GUO Lei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200601007]]></guid><cfi:id>411</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Micro-strip Shorted Patch Antenna with Compact Electromagnetic Band-gap Structure]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200601008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A micro-strip shorted patch antenna with a compact electromagnetic band-gap structure (CEBG) is presented and a performance comparison is made with the conventional short-patched device of identical dimensions. Measured data shows a gain improvement of 3dB and a significant reduction cross polarization for the CEBG antenna. Meanwhile it proves that the design of the same resonant frequency can be attained under such a condition that the CEBG structure cell size is only about 40%～50% of conventional structure. It indicates that the suggested condition is significant in realizing the array of EBG of micro-strip phased antenna.]]></description>
<pubDate>2013/3/25 4:43:38</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHENG Qiurong,YUAN Naichang and LIN Baoqin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHENG Qiurong,YUAN Naichang and LIN Baoqin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200601008]]></guid><cfi:id>410</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Radiometric Calibration Model of Low Frequency UWBSAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200601009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Radiometric calibration is considered as an important and inevitable problem in the development and application of low frequency ultra wide band synthetic aperture radar (UWBSAR) system. Due to the characteristics of the UWSAR, the calibration procedure developed for the regular SAR is no longer feasible. With a careful consideration of the calibrating parameters which vary with the change of the frequency and the aspect angle, this paper proposes that the radiometric calibration method is applicable to the low frequency UWBSAR and a model of radiometric calibration is presented. With the help of such a model, the analysis of the system calibration error was conducted.]]></description>
<pubDate>2013/3/25 4:43:39</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZOU Kun,DONG Zhen and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZOU Kun,DONG Zhen and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200601009]]></guid><cfi:id>409</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Cyclic Cumulants Based Carrier Phase EstimationAlgorithm for QAM Signals]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200601011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[By using the cyclostationarity property of communication signals, a higher-order cyclic cumulants based carrier phase estimation algorithm for QAM signals is proposed. Normalized higher-order cyclic cumulants were utilized for the estimation, and the effect of the signal energy, time delay and pulse function with different roll-off parameters on the estimator was eliminated by the normalization. The correctness and effectiveness of the proposed estimation algorithm were verified via theoretical analysis and simulations.]]></description>
<pubDate>2013/3/25 4:43:41</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[FENG Xiang<sup>1,2</sup> and LI Jiandong<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FENG Xiang<sup>1,2</sup> and LI Jiandong<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200601011]]></guid><cfi:id>408</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A High Performance Measurement of Single Frequency'sInitial Phase]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200704018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A high performance measurement of initial phase via a Dual Interpolated DFT method based on error information is presented. Theory analysis and numerical simulation results all indicate that the performance of the method is close to the Cramer-Rao Bound.]]></description>
<pubDate>2013/2/28 5:08:53</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Yuanling,SUN Guangfu,OU Gang and ZHUANG Zhaowen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Yuanling,SUN Guangfu,OU Gang and ZHUANG Zhaowen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200704018]]></guid><cfi:id>407</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[High-power UWB Antenna Array and Its Application in OutdoorTarget Detection]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The split-tapper Balun was introduced in the high-power ultra-wide-band (UWB) antenna. Finite-difference time-domain (FDTD)  was used to analyze the Balun and antenna. The 2×4 elements array was fabricated and the measurement result shows that the antenna can resist high voltage up  to 250kV with six multiple frequency (200～12 000MHz) and preserves short pulse waveform well. Outdoor detection experiment system was built by using the antenna array. Target detection experiment was carried outdoors. The experiment result indicates that the array can be used in the practical UWB radar for transmitting antenna arrays, thus making a first step for the application of high-power source in radar detection.]]></description>
<pubDate>2013/2/28 5:08:40</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Fengtao,ZHANG Guangfu,LIANG Buge and YUAN Naichang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Fengtao,ZHANG Guangfu,LIANG Buge and YUAN Naichang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703008]]></guid><cfi:id>406</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Fast Implementation for Joint Space-time Anti-jammingAntenna Array]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Joint Space-time Anti-jamming technique has better performance than both space domain processing and time domain processing, but its implementation is difficult due to its computational complexity. With the toeplitz feature of the observation covariance matrix, the covariance matrix to a big toeplitz matrix can be expanded. Based on the new toeplitz matrix and the FFT technique, a fast implementation approach of MSNWF was proposed for joint space-time processing. The comparison result of computation consumption shows that  the new approach is efficient, making it easier for the application of joint space-time anti-jamming technique.]]></description>
<pubDate>2013/2/28 5:08:41</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Shuangxun,CHENG Zhu,XUE Hongyin and HUANGFU Kan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Shuangxun,CHENG Zhu,XUE Hongyin and HUANGFU Kan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703009]]></guid><cfi:id>405</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Evaluation of Range Alignment Methods in ISAR Imaging]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Motion compensation, which usually includes range alignment and phase compensation, plays a key role in ISAR imaging. As the basis of phase compensation, range alignment has been investigated comprehensively and multifarious range alignment methods have been proposed. When the impact of range alignment cannot be judged directly, it is necessary to choose the optimal range alignment method. An evaluation method based on variance of range bins is proposed. It makes use of weighted sum of range bins' variance from range alignment to evaluate impact of range alignment method directly. The results of simulation verify the effectiveness of the method.]]></description>
<pubDate>2013/2/28 5:08:41</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XIAO Shunping,WEI Jiangong,FENG Dejun and WANG Xuesong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIAO Shunping,WEI Jiangong,FENG Dejun and WANG Xuesong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703012]]></guid><cfi:id>404</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A New Method of Automatic Target Discriminationin High－resolution SAR Image]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Target discrimination is a key step of SAR-ATR, which can remove many false ROI chips obtained by prescreening adopting anomaly detection. A new method of automatic target discrimination was proposed in this paper. Firstly, the results of CFAR detection were discriminated using the area of target, and ROI chips are exported. The features were extracted from the ROI chips, and then the ordered discrimination was realized by comparing the features with the thresholds based on the features. The real X band SAR image data was used to test the discrimination algorithm above mentioned, and finally the discriminated ROIs were presented.]]></description>
<pubDate>2013/2/28 5:08:41</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Yu,WANG Shixi,JI Kefeng and Su Yi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Yu,WANG Shixi,JI Kefeng and Su Yi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703017]]></guid><cfi:id>403</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis for Chaos Used in UWB Imaging Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A novel chaos based pulse amplitude modulated ultra-wide band (CPAMUWB) imaging radar was presented. The proposed radar has good range resolution and excellent range side lobe suppression characteristics that enhance its imaging performance, better than that of the conventional time modulated UWB (TMUWB) radars in reducing false alarms. Numerical electromagnetic (EM) simulations using finite difference time domain (FDTD) method illustrate the definite advantages of the proposed radar under different scenarios.]]></description>
<pubDate>2013/2/28 5:08:41</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Peiguo,LIU Jibin,LI Gaosheng,ZHOU Weihong and ZHANG Ting]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Peiguo,LIU Jibin,LI Gaosheng,ZHOU Weihong and ZHANG Ting</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703018]]></guid><cfi:id>402</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Impulse Radar System and Detecting Experiment]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The research is based upon a self-developed impulse radar experiment system, whose essential technologies include multiplex correlative pulse combining pulser, quadrature demodulation sampling receiver, signal processing system and pulse radiating and receiving array antennas and so on. The detection experiment of stealthy targets in the outdoor was carried out by the system. Its results indicate that the impulse radar has the powerful capability of anti-shape stealth and anti-material stealth.]]></description>
<pubDate>2013/2/28 5:08:28</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Yi,ZHANG Weijun,ZHANG Guangfu,LIANG Buge and YUAN Naichang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Yi,ZHANG Weijun,ZHANG Guangfu,LIANG Buge and YUAN Naichang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702011]]></guid><cfi:id>401</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Study of a Single Ridged Wave-guide Slot Phased Antennawith Electromagnetic Band-gap Structure (EBG)]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A single ridged wave-guide slot phased antenna (SRWSPA) with a photonic band-gap structure which is alternately arranged on the antenna is presented. Another antenna with identical dimensions on a metal ground plane is also included, so that a direct performance comparison can be made. Measured data shows an obvious improvement of radiation pattern, a reduction of coupling coefficient between elements, a significant reduction of back lobe and an improvement of scanning performance. Meanwhile it also proves that the structure is more effective to suppress the surface wave than the choke ring. This is significant in improving the radiation performance of the single ridged wave-guide slot phased antenna.]]></description>
<pubDate>2013/2/28 5:08:28</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHENG Qiurong<sup>1</sup>,CHEN Xiameng<sup>2</sup>,FU Yunqi<sup>1</sup> and YUAN Naichang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHENG Qiurong<sup>1</sup>,CHEN Xiameng<sup>2</sup>,FU Yunqi<sup>1</sup> and YUAN Naichang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702012]]></guid><cfi:id>400</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Quantum Secure Communication Protocols on the Basis of Entanglement Swapping]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A quantum secure direct communication protocol and a multiparty quantum secret sharing protocol based on Einstein-Podolsky-Rosen pairs and entanglement swapping are presented. The present quantum secure direct communication protocol makes use of the ideal of block transmission. Different from the proposed quantum secure direct communication protocols, the sender can encode one'ssecret message as one of the four Bell states without ensuring the security of the quantum channel firstly. In the multiparty quantum secret sharing protocol, the communication parties adopt checking mode or encoding mode with some probability. It does not need multi-particles entangled state but only Einstein-Podolsky-Rosen pair to realize the protocol. Compared with the proposed quantum secret sharing protocol with entanglement swapping, it is unnecessary for the protocol to perform local unitary operation. The efficiency for the protocol is greatly improved. The securities for both the protocols are the same as that for BBM92 protocol.]]></description>
<pubDate>2013/2/28 5:08:28</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Jian,CHEN Huangqing,ZHANG Quan and TANG Chaojing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Jian,CHEN Huangqing,ZHANG Quan and TANG Chaojing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702013]]></guid><cfi:id>399</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Rapid Algorithm for Distributed Small SatelliteSAR Raw Signal Simulation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Raw signal simulation is considered the base for the study of distributed small satellite SAR system. Huge computation is needed when raw signal of wide area natural scenes is simulated. A rapid algorithm using FFT is proposed to reduce computation. Firstly, time domain response of the natural scene is approximately expressed by pulse sequence. Then in frequence domain, LTI filter is realized with FFT to generate raw signal. The results of SAR imaging and interferometric processing of simulated raw signal validate the algorithm.]]></description>
<pubDate>2013/2/28 5:08:28</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Min,LIANG Diannong,DONG Zhen and LU Xingqiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Min,LIANG Diannong,DONG Zhen and LU Xingqiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702014]]></guid><cfi:id>398</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An Efficient Target Detection Algorithm on the Basis of SMC]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[An efficient target detection algorithm for infrared sequence image with sea-sky background is presented. For the big none-Gaussian noises and the none-linear movement of the target, the algorithm is established mainly on the basis of the Sequential Monte Carlo (SMC) method. The algorithm uses the statistic values of the target's feature image to change the weight of the particles which are produced by Monte Carlo sampling, and the target is detected and tracked based on the control of these weights. The difference image is used as the feature image. The experimental results demonstrate the effectiveness and real-time efficient of the algorithm.]]></description>
<pubDate>2013/2/28 5:08:28</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Ganhua<sup>1,2</sup>,DONG Li<sup>2</sup>,CAI Xuanping<sup>1</sup>,ZHOU Dongxiang<sup>1</sup> and LIU Yunhui<sup>1,3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Ganhua<sup>1,2</sup>,DONG Li<sup>2</sup>,CAI Xuanping<sup>1</sup>,ZHOU Dongxiang<sup>1</sup> and LIU Yunhui<sup>1,3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702015]]></guid><cfi:id>397</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research of Satellite-to-satellite Passive Locating and Trackingwith Bearings-only Measurements]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Regarding the problems of singularity while using classic orbital elements in satellite bearings-only passive tracking and the lack of physical meanings in measurement equation's variables and their corresponding coordinate transformations, a new satellite-to-satellite extended Kalman filtering (EKF) tracking method with bearings-only measurements in J2000.0 ECI frame is put forward. An explicit definition of the variables and their coordinate transformations in measurement equation are submitted. Moreover, the state propagation stage, state transfer matrix and measurement Jacobi matrix are deducted in detail. Performance is contrasted and validated through simulated data from STK6.0 with various initial state errors and angles measurement errors. Simulation indicates that it is possible to passively track low earth circular orbit satellite (e=0) by a high earth orbit satellite (quasi-geosynchronous orbit satellite) with bearings-only measurements. When the angles measurement accuracy exceeds the average angles changing magnitude, the convergence time and the tracking errors rapidly decrease. Moreover, the method also shows resilience to varying initial state errors.]]></description>
<pubDate>2013/2/28 5:08:27</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Qiang,GUO Fucheng and ZHOU Yiyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Qiang,GUO Fucheng and ZHOU Yiyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702016]]></guid><cfi:id>396</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study and Development of UWB Compact Range MeasuringSystem for Radar Target of Time Domain]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Operating principle and developing procedures of a time-domain measuring system of radar target are introduced. Digital Sampling Oscilloscope is used for measuring in compact range for the first time. The theory of time domain measurement was studied and the structure of the system and flow diagram for measuring were given. Programs for controlling of the oscilloscope and turntable as well as data processing were developed, based on which an entire measuring system of UWB compact range is achieved. Finally, some data measured and processed by the system are presented.]]></description>
<pubDate>2013/2/28 5:08:28</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Jibin,MAO Junjie,LI Gaosheng and LIU Peiguo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Jibin,MAO Junjie,LI Gaosheng and LIU Peiguo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702021]]></guid><cfi:id>395</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study on Range Imaging of De-chirped FM-CW SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200701011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[There is a growing interest in the frequency modulated continuous wave (FM-CW) SAR for its advantages such as small cubage, light  weight, cost-effective and high resolution. In this paper, imaging process in range direction was analyzed in detail, and a useful conclusion was drawn that the RVP is removed in the course of performing Fourier transform in range direction; Then, the factors affecting range resolution for the de-chirped FM-CW SAR was discussed，and the method improving the range resolution as well as decreasing the range sample frequency was put forward. The deduction of the process shows that the slope factor exists in FM-CW SAR. Therefore, the generation of the slope factor and the method of de-sloping were analyzed, and the corresponding range imaging algorithm was also presented, creating better focus conditions for the azimuth direction.]]></description>
<pubDate>2013/2/28 5:08:14</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GENG Shumin and HUANGFU Kan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GENG Shumin and HUANGFU Kan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200701011]]></guid><cfi:id>394</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Observability of Maneuvering Target Passive Tracking withBearing and Doppler Measurements]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200701012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Observability analysis is the basic and prime task in passive localization and tracking system, for only when the system is observable, it can be determined with unique and definite solution. In this paper, the observability for two kinds of  typical maneuvering motion (constant acceleration and constant turn rate motion) is analyzed from the perspective of linear system theory, utilizing the integrated information of target's angle of arrival and Doppler frequency. This may lay the theoretic foundation for further research of maneuvering target localization and tracking. Finally, two simulation instances are presented to demonstrate the mathematical derivation and the results are consistent with those concluded from theoretic analysis, indicating that the method is correct and valid.]]></description>
<pubDate>2013/2/28 5:08:14</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHAN Ronghui,WANG Ling and WAN Jianwei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAN Ronghui,WANG Ling and WAN Jianwei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200701012]]></guid><cfi:id>393</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Short Period PN Code Capture Technique with Self-jamming Code]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200701013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[PN code capture is a difficult problem in radio reconnaissance and navigation warfare. The PN code capture under self-jamming code was studied from the point view of pattern recognition theory. The carrier frequency and phase of self-jamming code were estimated and compensated firstly. Thus the PN code capture was converted into pattern recognition problem. Combined with the periodicity of the short PN code, binary integration was introduced to reduce the SNR before decision, which made the direct demodulation of spread spectrum signals feasible without large diameter antenna.]]></description>
<pubDate>2013/2/28 5:08:14</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHU Xiangwei,WANG Mengli,WANG Feixue and ZHUANG Zhaowen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHU Xiangwei,WANG Mengli,WANG Feixue and ZHUANG Zhaowen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200701013]]></guid><cfi:id>392</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design and Realization of PPI Signal Raster Scan RadarDisplay System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200701014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The design and realization of PPI signal raster scan radar display system was introduced, and the key technologies of coordinates conversion and data real-time acquisition were analyzed too. An optimal table look-up method and a real-time data acquisition technical scheme were proposed. The methods were successfully used in a PPI signal raster scan radar display system on active service, and well fulfilled the high-speed, low-memory, and real-time requirements of raster scan radar.]]></description>
<pubDate>2013/2/28 5:08:14</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YU Huiying,LU Min and YONG Shaowei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YU Huiying,LU Min and YONG Shaowei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200701014]]></guid><cfi:id>391</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modeling and Analysis of Conformal Array AirbornePhased Radar Clutter<sup>*</sup>]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200806020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In view of the factors such as the element pattern and the element direction for an arbitrary airborne radar conformal array, the spatial snapshot and the subarraying are studied, and a general clutter model at the element level is introduced on the basis of the fact that the conformal array spatial matched filter, which is different from that of routine planar array, is provided. Finally, clutters and their distribution of several conformal arrays for airborne radar are simulated and analyzed respectively. The Results validates the feasibility of the clutter model.]]></description>
<pubDate>2012/12/7 2:58:06</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GAO Fei<sup>1,2</sup>,XIE Wenchong<sup>2</sup>,DUAN Keqing<sup>1,2</sup> and WANG Yongliang<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GAO Fei<sup>1,2</sup>,XIE Wenchong<sup>2</sup>,DUAN Keqing<sup>1,2</sup> and WANG Yongliang<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200806020]]></guid><cfi:id>390</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Fast Range Search Algorithm for LFM Pulsed Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200806023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A common issue in pulsed radar is the eclipsing effect for near range target. Firstly, theoretical analysis is presented to show that the radar's minimum operating range is not subject to pulse width, and then by using Chirp pulse as an example, a fast search algorithm suitable for both near and far range target is proposed. Compared with conventional search algorithms, which need multiple search wave form to cover the entire range domain, the presented algorithm needs only one single search mode, and thus reducing search time. Finally, simulation results validate the correctness of the theoretical analysis and effectiveness of the processing algorithm.]]></description>
<pubDate>2012/12/7 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Jun and ZHAN Ronghui]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Jun and ZHAN Ronghui</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200806023]]></guid><cfi:id>389</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Linear Compensation of Range Profile of ManeuveringTarget via Radon-ambiguity Transform (RAT)]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The wide-band LFM pulse de-chirp return signals model of maneuvering target is studied. Based on the spectral expansion characteristics of the velocity and acceleration's frequency modulation, a novel linear frequency modulation(FM) return signals model of wide-band range profile of maneuvering target is proposed. Linear parameter estimation and compensation of range profile via Radon-ambiguity transform (RAT) is presented, and the measurement errors of range and velocity are analyzed. The simulation results validate linear compensation model via RAT, indicating that this method can resolve the range profile spectral expansion of maneuvering target unknown motion parameters.]]></description>
<pubDate>2013/3/11 3:01:23</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Wenchen,WANG Xuesong and WANG Guoyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Wenchen,WANG Xuesong and WANG Guoyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805009]]></guid><cfi:id>388</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Instantaneous Measuring Method of Radar TargetFull-polarization Range Profiles]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Wideband full-polarization measurement for radar target is of important application in the  research fields of radar imaging and target recognition. Based on orthogonal frequency division and full-polarization instantaneous measuring method, a new waveform vector was designed to get full-polarization information simultaneously under wideband condition. Firstly, the models of emitting and receiving signals were given, and full-polarization datum in frequency could be gathered, and then target full-polarization range profiles were obtained after IDFT. Finally, the validity of this measuring method was verified by simulation, using simulated datum and real measured datum.]]></description>
<pubDate>2013/3/11 3:01:23</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Yong<sup>1</sup>,LI Yongzhen<sup>1</sup>,WANG Xuesong<sup>1</sup> and LU Tongguang<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Yong<sup>1</sup>,LI Yongzhen<sup>1</sup>,WANG Xuesong<sup>1</sup> and LU Tongguang<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805010]]></guid><cfi:id>387</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Study on PN Code Ranging Error Caused by NonlinearPower Amplifier]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In high precision PN code ranging systems, HPA is an important component. However HPA introduces nonlinear distortion. As a result, it decreases the ranging performance. The PN code ranging error caused by the nonlinearity of HPA is studied, by means of theoretical deduction and numerical simulation. Quantitative relation of ranging error and HPA type, HPA output back-off, code chip waveform parameter is employed. The research result provides important suggestion for the choice of HPA type, the reservation of HPA power and the design of PN code waveform.]]></description>
<pubDate>2013/3/11 3:01:23</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Xing,GENG Shumin,OU Gang and ZHUANG Zhaowen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Xing,GENG Shumin,OU Gang and ZHUANG Zhaowen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805011]]></guid><cfi:id>386</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Novel Method for Polarization States Estimationof Receiving Wave]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Polarization estimation of interference signal is crucial for adaptive polarization filters. The filtering effect is restricted by the precision of polarization estimator. Based on the antenna's spatial polarization characteristics of single polarization radar, a new method for polarization state estimation of receiving wave is presented in this paper. Firstly, the principle of the estimation algorithm is introduced. Its performance is analyzed theoretically. Then, corresponding simulation experiment is made to discuss the main factors influencing the algorithm performance and the main approach to improving the performance is given. The validity of this method is demonstrated by theoretical derivation and computer simulation result.]]></description>
<pubDate>2013/3/11 3:01:23</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LUO Jia,WANG Xuesong,LI Yongzhen,XIAO Shunping and DAI Huanyao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LUO Jia,WANG Xuesong,LI Yongzhen,XIAO Shunping and DAI Huanyao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805012]]></guid><cfi:id>385</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Refined Azimuth Nonlinear Chirp Scaling Algorithmfor High Squint SAR Imaging]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The range walk correction (RWC) in time domain can resolve range walk problem in high squint SAR imaging. However, the limit of focus depth exists. By analyzing the residual phase error after wave number decoupling and Doppler rate error caused by RWC, a refined azimuth non-linear chirp scaling (ANCS) algorithm is proposed. Phase error caused by the third order range migration is corrected and a nonlinear CS function is applied to equalize the targets Doppler rates before azimuth compression. Simulation results show that the refined ANCS algorithm has good performance.]]></description>
<pubDate>2013/3/11 3:01:23</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Yueli,LIANG Diannong and LI Xiangyang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Yueli,LIANG Diannong and LI Xiangyang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805013]]></guid><cfi:id>384</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Man-made Target Extraction Based on Scattering MechanismIdentification and Azimuthal Symmetry Decision of POLSAR Images]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Owing to the complexity of the electromagnetic scattering characteristics of man-made targets, it is difficult for traditional extraction methods to discriminate all potential targets from polarimetric synthetic aperture radar (POLSAR) images. To overcome this shortcoming, a novel scheme based on scattering mechanism identification and azimuthal symmetry decision is proposed in this paper. The novel scheme is implemented based on the difference between man-made target,and natural clutter on scattering mechanism type and the property of azimuthal symmetry. Compared with traditional methods, our scheme has the advantage of obtaining a more successful result, and targets exhibiting different types of polarimetric characteristics can all be well extracted. The validity of the novel scheme is verified by fully polarimetric SAR data.]]></description>
<pubDate>2013/3/11 3:01:23</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Mu,WANG Xuesong,XIAO Shunping and WANG Tao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Mu,WANG Xuesong,XIAO Shunping and WANG Tao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805014]]></guid><cfi:id>383</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Robust UKF Algorithm for Single Observer PassiveTarget Tracking Based on Polar Coordinates]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A robust target tracking algorithm with fast convergence is very important in single observer passive target tracking system which has inherent disadvantage of weak observability and large initial error. Considering the characteristics of single observer passive target tracking systems via spatial-frequency domain information, a robust improved UKF algorithm is proposed in this paper. Robustness of this algorithm is enhanced by using radial velocity as a state variable and limiting its initial estimating error in a certain bound. A re-sampling process is added to replace the state variables extending of conventional UKF, thus making less computation amount and easier realization. Compared with usual algorithms used in single observer passive target trackings, such as EKF and UKF, the new algorithm is more robust and has faster convergence velocity, lower tracking error. The correctness and validity of the algorithm are comfirmed by the numerical simulation results.]]></description>
<pubDate>2013/3/11 3:01:22</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YU Chunlai<sup>1,2</sup>,ZHAN Ronghui<sup>1</sup> and WAN Jianwei<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YU Chunlai<sup>1,2</sup>,ZHAN Ronghui<sup>1</sup> and WAN Jianwei<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805015]]></guid><cfi:id>382</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Novel Adaptive Suppression Method of Interferences in theVehicle-mounted UWB SAR System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[With an analysis of the types and formation mechanism of interferences in the vehicle-mounted ultra-wideband synthetic aperture radar (UWB SAR) detection system, a novel adaptive method is presented for the interferences suppression in the image domain based on the iterative technique. It can overcome the limitations and drawbacks of a batch processing method proposed by Tsaipei Wang. By exploiting the constant false alarm rate (CFAR) detector with weibull distribution, the new method can improve the accuracy of interference estimation. Then the parameters estimation and updating can be realized by using the iterative operation, and the adaptive interference suppression can be achieved on line. The processing results of real data show that the proposed method can effectively suppress the self-signature interference and is prone to real-time processing in structure. It can meet the needs of real-time preprocessing in the vehicle-mounted UWB SAR detection system.]]></description>
<pubDate>2013/3/11 3:01:23</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YANG Yanguang,ZHOU Zhimin,WANG Jian,SONG Qian and JIN Tian]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Yanguang,ZHOU Zhimin,WANG Jian,SONG Qian and JIN Tian</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805016]]></guid><cfi:id>381</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Differential Interferometry forBi-satellite Formation SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200804014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[According to the characteristics of Bi-satellite formation SAR system, the peculiarity and superiority of differential interferometry were discussed, valid components of baseline for differential interferometry were obtained by decomposing the solid baseline, and then the model of differential interferometry for Bi-satellite formation SAR was established, and a method based on data fusion was used to compensate the measurement noises that were very hard to be avoided. Finally, a computer simulation results confirmed the feasibility and precision of the proposed model and method.]]></description>
<pubDate>2012/12/7 2:57:37</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Min,SUN Xilong,YU Anxi and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Min,SUN Xilong,YU Anxi and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200804014]]></guid><cfi:id>380</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Distributed Spaceborne Single Baseline SAR/ATIBased on a Prior Information]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200804015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on an overview of the distributed spaceborne SAR/ATI, this paper describes the principle of SAR/ATI and the impact of clutter and noise to the SAR/ATI performance, and proposes a new SAR/ATI method based on a priori information. Based on the multifunctional spaceborne radar simulator, simulation experiment and performance analysis are carried out to verify the effectiveness of the method.]]></description>
<pubDate>2012/12/7 2:57:38</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CAI Bin,LIANG Diannong,DONG Zhen and HUANG Haifeng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CAI Bin,LIANG Diannong,DONG Zhen and HUANG Haifeng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200804015]]></guid><cfi:id>379</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Fast Target Recognition Approach Based on PCAFeatures for SAR Images]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200803027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The extensively focused target recognition is one of the important problems for SAR imagery interpretation. With the aim to real-time processing, a fast SAR target recognition system is built, which utilizes the principal component analysis (PCA) for feature extraction and a multi-layer neural network (MLP NN) as the classifier. The experimental results show that it consumes little memory and runs very fast, thus can be used in the real-time situation.]]></description>
<pubDate>2012/12/7 2:57:24</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Shixi and HE Zhiguo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Shixi and HE Zhiguo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200803027]]></guid><cfi:id>378</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Estimation of the Confidence Interval for Space Debris PopulationBased on Radar Beam Fence]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200802015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A method of estimating the confidence interval for  debris population using radar beam fence is described. Whether a debris object  may cross the beam fence, that is, whether a debris has large enough inclinationand radar cross section or not, is actually detected and modeled as a (0-1) distribution. Using debris altitude data collected, the average probability of crossing the beam fence is obtained. The confidence interval for debris population is estimated by the Central Limitation Theorem. The validity of the method is verified by simulation.]]></description>
<pubDate>2012/12/7 2:57:08</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SONG Zhengxin,HU Weidong,TAO Yong and YU Wenxian]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SONG Zhengxin,HU Weidong,TAO Yong and YU Wenxian</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200802015]]></guid><cfi:id>377</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Signal Processing Methods of Antenna and Target CharacteristicsMeasuring System in Time-domain]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200802018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A study on the signal processing methods of time-domain measuring system is presented. Firstly, the background subtraction as a method of signal pretreatment is introduced, and FFT and CT(Chirp Transform) were applied to a time-domain UWB compact range measuring system. In the end, a comparison was made between the efficiency of FFT and that of CT.]]></description>
<pubDate>2012/12/7 2:57:08</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Jibin,LI Gaosheng,LIU Peiguo and ZHOU Dongming]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Jibin,LI Gaosheng,LIU Peiguo and ZHOU Dongming</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200802018]]></guid><cfi:id>376</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Channel Estimator for Turbo Receiver in MIMO-OFDM Systems]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200801010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new channel estimator is proposed for Turbo receiver in MIMO-OFDM systems. The channel estimation error was taken into account in the evaluation of the extrinsic information for the coded bits. With the help of the candidates list of the list sphere decoder (LSD) and a prior information from the decoder, the approximation of the soft information in the conventional EM channel estimator was amended, and the statistic information of the soft symbols was improved for channel estimation. A new Bayesian EM channel estimation algorithm, which considers the autocorrelation of the soft symbols, was obtained. The simulation results show that the newly proposed algorithm has better performance in terms of both BER and mean square estimation error in comparison with the conventional EM algorithm.]]></description>
<pubDate>2012/12/7 2:56:53</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HU Yanfen<sup>1</sup>,ZHANG Xiaoying<sup>2</sup> and WEI Jibo<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Yanfen<sup>1</sup>,ZHANG Xiaoying<sup>2</sup> and WEI Jibo<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200801010]]></guid><cfi:id>375</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Compensation of Archimedean-spiral Antenna Group Delay andUWB-SAR System Delay]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200801013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The group delay of the Archimedean-spiral antenna was cataloged into the dispersion part and the constant part. Then a geometrical analysis was used to reveal the inherent dispersion property of the antenna's group delay. As a result, it effectively compensated the unknown antenna with its geometry measured. The constant group delay of the antenna was added into the system delay as a whole, and the whole delay was estimated through the Hough transformation of the hyperbola of a calibration marker (e.g. trihedral), as one of the curve parameters is the system delay. By an estimation of the azimuth location of the nadir of the curve using its symmetrical property, the dimension of the Hough transformation is further eliminated, so the method is efficient. Rail Ultra Wide Band SAR (UWB-SAR) data processing result verified the compensation method.]]></description>
<pubDate>2012/12/7 2:56:53</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Jian,ZHOU Zhimin and SONG Qian]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Jian,ZHOU Zhimin and SONG Qian</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200801013]]></guid><cfi:id>374</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Nonuniform Radius Assignment Scheme for SphereDecoding and Performance Analysis]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200801014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the sphere decoding (SD) algorithm, the strategy of initial radius selection and assignment has significant impact on the performance and complexity of the algorithm. In order to reduce the prohibitive complexity of conventional SD algorithm at low signal-to-noise ratios (SNRs), a novel strategy of initial radius selection and (quasi-) linear assignment is proposed based on V-BLAST signal model. The method of analyzing the performance and complexity of SD algorithm applying the proposed scheme is suitable for any nonuniform radius assignment strategy. Analysis and simulation show that, compared with the conventional SD algorithm, the complexity is reduced significantly by the proposed scheme at low SNRs, and the bit-error-rate performance is close to that of maximum likelihood detection in a relatively large SNR range.]]></description>
<pubDate>2012/12/7 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Ying<sup>1</sup>,WEI Jibo<sup>1</sup> and ZHANG Wei<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Ying<sup>1</sup>,WEI Jibo<sup>1</sup> and ZHANG Wei<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200801014]]></guid><cfi:id>373</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Integration Algorithm of Emitter Location Based onSatellite-borne Interferometer]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200906021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To deal with the location estimation problem in many observations by the satellite-borne interferometer, this paper presents a new location integration algorithm, which is independent of any prior knowledge. First, it analyzes the location precision of the satellite-borne interferometer. On the basis of this, it presents an integration algorithm of emitter loci by using the location errors covariance matrix as weights. Simulation results show that the location precision can be improved by using the new method.]]></description>
<pubDate>2012/11/8 3:50:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Haijun,YE Haohuan,LIU Zheng and ZHOU Yiyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Haijun,YE Haohuan,LIU Zheng and ZHOU Yiyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200906021]]></guid><cfi:id>372</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Algorithm Research on CW Radar Low-altitude Measurement]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The phase-comparison method in frequency domain is usually used in the angle measurement by the conventional CW radar. Based on         amplitude-comparison method in frequency domain, a new algorithm of low-angle measurement by CW radar is proposed. An investigation is made to expose the relationship between phase-comparison method and amplitude-comparison method, with the conclusion that the amplitude-comparison method in frequency domain can be used in the angle measurement by the CW radar. Furthermore, the utility of the C<sup>2</sup>algorithm is also studied, Additionally, a new algorithm of low-angle measurement of CW radar is given. Experimental results show that the proposed algorithm is effective for tracking the target in low-altitude environment.]]></description>
<pubDate>2012/11/8 3:52:17</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Zhan,LOU Shengqiang,LIU Haitao,LI Shuangxun and ZHAN Yonghong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Zhan,LOU Shengqiang,LIU Haitao,LI Shuangxun and ZHAN Yonghong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904010]]></guid><cfi:id>371</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Severe Clutter Suppression in High PRF Stepped-frequency Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A processing flow is proposed to suppress the severe clutter in high pulse repetition frequency (PRF) stepped-frequency radar. Firstly, the folded clutter caused by high PRF is attenuated by the intermediate frequency (IF) band-pass filter in the receiver's foreside. Secondly, two methods are brought forward to reject the residual clutter for targets of different velocities in signal processing system. On condition of specific waveform parameters, high range resolution processing eliminates the effect of the clutter to high speed targets. Two high resolution range profiles (HRRP) are utilized to cancel the clutter for low speed targets. The current method of processing need not change the basic stepped-frequency waveform and has the advantages of simplicity and effectiveness. The simulation and experiment results validate the correctness of the method.]]></description>
<pubDate>2012/11/8 3:52:17</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Feixing,TANG Guangfu,HE Sisan and FU Qiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Feixing,TANG Guangfu,HE Sisan and FU Qiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904011]]></guid><cfi:id>370</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research Process of Spaceborne SAR-GMTI Systems]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Spaceborne SAR-GMTI Systems have the ability to detect, track and relocate moving targets of the ground or the sea. The systems may provide high quality information for battlefield command, pinpoint strike and state evaluation, which is an important technique for space based reconnaissance. In this paper, Spaceborne SAR-GMTI Systems and relevant research process are introduced. The significant researches and development status quo in this field are discussed, and their limitations and key techniques are analyzed. Finally, the technique challenge and research emphasis are proposed.]]></description>
<pubDate>2012/11/8 3:52:17</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIANG Diannong<sup>1</sup>,CAI Bin<sup>1</sup>,WANG Min<sup>2</sup> and DONG Zhen<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIANG Diannong<sup>1</sup>,CAI Bin<sup>1</sup>,WANG Min<sup>2</sup> and DONG Zhen<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904017]]></guid><cfi:id>369</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Achieving Unambiguous High Resolution RangeProfiles for Stepped-frequency Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Regarding the fact that ambiguous high resolution range profiles of stepped frequency radar is cycle extension, a new method to achieve unambiguous range profiles equivalent to mixing process is proposed, and the range of local mixing frequency is presented. Finally, the validity of this method is verified by simulation.]]></description>
<pubDate>2012/11/8 3:52:17</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Jianjun,WANG Feixing,CHEN Yuanzheng and FU Qiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Jianjun,WANG Feixing,CHEN Yuanzheng and FU Qiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904018]]></guid><cfi:id>368</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design and Implementation of Digital Channelization-basedCarrier Guide Module  for Very Weak Signal]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200903010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In deep space exploration, normal points FFT cannot exactly fulfill the frequency guide for very weak signals while very large size FFT cannot be computed by COTS. A parallel FFT method based on digital channelization is proposed to fulfill the frequency guide. The input signal is first divided into several narrow bands and FFT is computed in every sub-band. Then frequency estimation is performed by jointly detecting the valid sub-band spectrum lines. In FPGA implementation of the module equivalent to 29 points FFT，the FFT module is reused for resource saving. The test results show that the resolution is less than 10Hz when the sampling rate is 8MHz.]]></description>
<pubDate>2012/11/8 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Yongming<sup>1,2</sup>,DENG Kai<sup>3</sup>,WANG Shilian<sup>1</sup> and ZHANG Eryang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Yongming<sup>1,2</sup>,DENG Kai<sup>3</sup>,WANG Shilian<sup>1</sup> and ZHANG Eryang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200903010]]></guid><cfi:id>367</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Method of Random RFI Suppression for GPR Based on Wavelet]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200903014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Due to the frequency sharing, Electro Magnetic Compatibility between GPR and Mobile Telephone System is crucial. In the current study, the properties of the random RFI signal received by GPR are analyzed in detail, and the differences between the random RFI and target signal are presented in wavelet field. Furthermore, the method of random RFI suppression based on wavelet transform is proposed. Additionally, the two types of data are collected to  validate the performance of the method. Finally, the experimental results prove the effectiveness of the method.]]></description>
<pubDate>2012/11/8 3:52:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LU Min,LI Yu,HUANG Chunlin and SU Yi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Min,LI Yu,HUANG Chunlin and SU Yi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200903014]]></guid><cfi:id>366</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Transmission of SAR Matching Position in IntegratedNavigation System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200903015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[There are several sub-transmission processes before matching-position parameters are transferred into combination-filter in INS/SAR integrated navigation system. In this paper these processes were studied, and the relations between them were analyzed, including the transmission of position information from ground matching centre to SAR phase centre, the transmission of position information from SAR phase centre to assistant INS centre, and the transmission of position information from assistant INS centre to master INS centre. Based on the analysis, a mathematical model of parameter-transfer was established. Modified inertial navigation parameters based on the model are reasonable, and results of transfer errors are rational, which prove the efficiency and flexibility of the model proposed.]]></description>
<pubDate>2012/11/8 3:52:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[BU Yanlong,PAN Liang,HU Guochang and SHEN Lincheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>BU Yanlong,PAN Liang,HU Guochang and SHEN Lincheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200903015]]></guid><cfi:id>365</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A New Algorithm on Estimation of DOA Using MIMO Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200903019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[MIMO radar obtains spatial diversity by distributed sensors, which are difficult for the estimation by DOA. In this paper, the transmit elements are widely separated with the receiving elements closely spaced. By transmitting orthogonal signals, virtual subarrays are designed through filters, and the Subarrays Selection(SAS) algorithm is proposed. The algorithm obtains spatial diversity as well as robust super-resolution direction-of-arrival estimation. The proposed algorithm is extended in 2-D location of MIMO, then it obtains spatial diversity as well as increased freedoms. Finally the simulated results show that the SAS algorithm is effective.]]></description>
<pubDate>2012/11/8 3:52:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Hongbo,WANG Huaijun,LU Min and SU Yi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Hongbo,WANG Huaijun,LU Min and SU Yi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200903019]]></guid><cfi:id>364</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An Approach for Electromagnetic Detection Satellites SchedulingBased on Genetic Algorithm with Dynamic Punish Function]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Considering the specific constrains of electromagnetic detection satellite (EDS), a multi-satellites scheduling model is established and a scheduling algorithm based on genetic algorithm is proposed. To deal with some specific constraints, a punish function method is introduced. In order to conquer the difficulty of punish coefficient setting, a mechanism of punish coefficient self-adaptive adjustment is designed. Finally, some experiments are conducted to verify the correctness and practicability of our scheduling algorithms.]]></description>
<pubDate>2013/1/31 4:04:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Hao,LI Jun,TANG Yu and JING Ning]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Hao,LI Jun,TANG Yu and JING Ning</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902010]]></guid><cfi:id>363</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Quantum Secure Direct Communication Protocol with PureEntangled States]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[We present a quantum secure direct communication protocol where the channels are not the maximally entangled states. The communication parties utilize decoy photons to check eavesdropping. After ensuring the security of the quantum channel, the sender encodes the secret message and transmits it to the receiver by using controlled-NOT operation and von Neumann measurement. The protocol is efficient in that all pure entangled states are used to transmit the secret message. As for the experimental feasibility, our protocol can be realized with today's technologies. The protocol is also verified to be secure for a noise quantum channel.]]></description>
<pubDate>2013/1/31 4:04:33</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Jian,ZHANG Sheng,ZHANG Shoulin and ZHANG Quan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Jian,ZHANG Sheng,ZHANG Shoulin and ZHANG Quan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902011]]></guid><cfi:id>362</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Crosstalk Analysis of Arbitrary Layout TransmissionLine Using BLT Equation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Crosstalk of arbitrary layout transmission line is analyzed using BLT equation. Transmission line is cut in discrete pieces, Ideal Junction is imported to calculate the scattering parameters, and the transmission line is made equivalent to multiconductor transmission line network. The cases of non-parallel line and cross line are emphasized. The numerical examples indicate the validity of the method, and the method can offer theoretical instruction for the crosstalk analysis in electromagnetic compatibility.]]></description>
<pubDate>2013/1/31 4:04:33</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[QIN Yujian,ZHOU Dongming and HE Jianguo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>QIN Yujian,ZHOU Dongming and HE Jianguo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902012]]></guid><cfi:id>361</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Remote Sensing Satellites Observing Scheduling towardSpot and Polygon Targets]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Two types of tasks, the spot and polygon targets, are requested in remote sensing. However, great difference exists between the two request tasks and it is difficult to schedule the two kinds of requests within  one model. In this paper, a novel model is proposed to tackle it by the following method. The spot requests are regarded as special polygon and they are also partitioned into subtasks. All of the subtasks generated by the requests are mapping into atomic task, and two types of request were unified in atomic task level. Finally, two evaluation functions were proposed to deal with there difference. Simulation results demonstrate the validity of the current approach.]]></description>
<pubDate>2013/1/31 4:04:33</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[BAI Baocun,HE Renjie,LI Jufang and CHEN Yingwu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>BAI Baocun,HE Renjie,LI Jufang and CHEN Yingwu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902013]]></guid><cfi:id>360</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A United Imaging Method for 3-D DistributedSpace-borne SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For a 3-D distributed space-borne SAR, small area antenna leads to serious Doppler ambiguity. Joint processing of all echoes from multiple antennas is able to eliminate Doppler ambiguity and obtain high resolution and wide swath. This paper firstly builds the echo model for the formation of one transmitting and two receivings. Then the relationship between the two received echoes is analyzed. After compensation for envelope difference and part of phase difference, the analytic expression which describes the frequency spectrum relationship between two echoes can be obtained accordingly. Based on this equation, two weight functions are designed to eliminate the Doppler ambiguity. Finally, a conventional imaging algorithm is used to get SAR images.]]></description>
<pubDate>2013/1/31 4:04:33</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LAI Tao,YANG Kefeng,DONG Zhen and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LAI Tao,YANG Kefeng,DONG Zhen and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902014]]></guid><cfi:id>359</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Sorting of Frequency Hopping Signals Based on K-MeansAlgorithm with Optimal Initial Clustering Centers]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new method is proposed to select optimal initial cluster centers. By searching parameters' histogram peak values, the number of cluster centers can be estimated, and these optimal initial cluster centers are selected in the columns or cells where the histogram peaks exist. Because these optimal initial cluster centers are near to real cluster centers, the iterations of clustering are reduced efficiently. Theoretical analysis demonstrates that the compute complexity of new method is lower than some conventional techniques. The improved K-Means algorithm is applied to sort frequency-hopping signals, and the simulation results demonstrate that the algorithm is effective.]]></description>
<pubDate>2013/1/31 4:04:33</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Lihu<sup>1</sup>,ZHANG Eryang<sup>1</sup> and SHEN Rongjun<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Lihu<sup>1</sup>,ZHANG Eryang<sup>1</sup> and SHEN Rongjun<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902015]]></guid><cfi:id>358</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on the Meter-wave Circular Array Radar for MIMO Systems]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200901011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the MIMO idea and the circular array radar, the meter-wave circular radar for MIMO systems is proposed. For the meter-wave circular array radar using MIMO systems, the correlation between the target and the image is reduced, the effective aperture of virtual array is also increased, and the   two-dimension angles of the target and the image can be estimated. Theory analyses and simulation experiment results show that the meter-wave circular array radar for MIMO systems not only can obtain the azimuth angle of the target, but also can make the differentiation between the target and the image from the elevation.]]></description>
<pubDate>2012/11/8 3:52:58</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HU Xiaoqin<sup>1,2</sup>,CHEN Jianwen<sup>2</sup>,WANG Yongliang<sup>2</sup> and CHEN Hui<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Xiaoqin<sup>1,2</sup>,CHEN Jianwen<sup>2</sup>,WANG Yongliang<sup>2</sup> and CHEN Hui<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200901011]]></guid><cfi:id>357</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Fast Factorized Backprojection Algorithm for Vehicle-mountedForward-looking Ground Penetrating SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200901015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The vehicle-mounted forward-looking ground penetrating SAR(VMFL-GPSAR) is a kind of bistatic SAR. Fast factorized backprojection(FFBP) originally developed for unistatic SAR fails to efficiently form well-focused VMFL-GPSAR image. A bistatic FFBP algorithm is derived after the analysis of the round trip range error of FFBP in VMFL-GPSAR. In the bistatic FFBP, the range error can be reduced by rational subaperture center configuration and by polar angle interval constraint. Besides, by combining range phase compensation and 2D linear interpolation, the bistatic FFBP can perform faster with the same focus precision. Simulation and VMFL-GPSAR raw data processing validate the bistatic FFBP algorithm, achieving a 2.31 times speedup.]]></description>
<pubDate>2012/11/8 3:52:58</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Jian,ZHANG Hanhua,ZHOU Zhimin,SONG Qian and JIN Tian]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Jian,ZHANG Hanhua,ZHOU Zhimin,SONG Qian and JIN Tian</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200901015]]></guid><cfi:id>356</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Algorithm and Performance Analysis of GPS Single Dual-polarizedAntenna Anti-jamming]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200901019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A more efficient adaptive GPS anti-jamming algorithm is designed by utilizing single dual-polarized antenna and its performance is discussed. While keeping intact the quality of the expected navigation signal, the new algorithm is able to do with either narrow or wide jamming while only occupying a single antenna position. Therefore, the new algorithm presents a better solution for improving anti-jamming ability of the small volume equipment. Simulation result shows that the new algorithm is feasible and efficient.]]></description>
<pubDate>2012/11/8 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHAN Yonghong,LI Shuangxun,WANG Zhan,CHENG Zhu and LU Junli]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAN Yonghong,LI Shuangxun,WANG Zhan,CHENG Zhu and LU Junli</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200901019]]></guid><cfi:id>355</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Advance in Digital Array Radar and Its Key Technologies]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006001]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[With the development of high speed ADC and general processor with high performance, the digitalization degree of radar has reached a level much higher than before. Firstly, this paper analyzed the advantages of Digital Array Radar (DAR). Secondly, it introduced several typical DAR systems and summarized the typical architecture of DAR. Finally it introduced the development of RF direct sampling all-digital receiver,    all-digital quadrature demodulation, wideband channel equalization, and the wideband signal digital beamforming technology. With the development of relevant technology, the array radar will surely develop to be digital, software defined and multifunctional.]]></description>
<pubDate>2012/8/28 16:33:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Zengping,ZHANG Yue and BAO Qinglong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Zengping,ZHANG Yue and BAO Qinglong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006001]]></guid><cfi:id>354</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Reconfigurable Computing Model for MultipurposeSignal Reconnaissance]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006002]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Reconnaissance of complex signal is an important part of the multifunctional digital array radar(MFDAR), which serves for multipurpose, including radar & communication signal reconnaissance or ESM(electronic support measurement). The real-time responsivity and flexibility are crucial for such a reconnaissance system. In this paper, we proposed a two-stage reconfigurable signal processing according to the reconnaissance characteristics of MFDAR. Then we constructed the Broadband Signal Reconnaissance Reconfigurable Computing Model(BSRRCM) based on the hybrid reconfigurable architecture to implement the processing procedures. BSRRCM describes non-identified and not unidirectional signal flow. Taking BSRRCM, we can decompose an application into a particular procedure which can be reconfigured completely and a partial reconfiguration tasks sequence, then this reconfigurable procedure and tasks sequence could be mapped on the appropriate computing platform. The BSRRCM has many merits at the same time, including flexibility, dynamic reconfigurability, multipurpose and scalability.]]></description>
<pubDate>2012/8/28 16:33:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Juhong,LIU Wanquan,BAO Qinglong and CHEN Zengping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Juhong,LIU Wanquan,BAO Qinglong and CHEN Zengping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006002]]></guid><cfi:id>353</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Long-time Coherent Integration Targets Detection  Method for Ubiquitous Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Ubiquitous radar receiver generates multi-beam at the same time to monitor the area designated. It can use long-time coherent integration method to improve target detection performance. However, the crossing-beam, crossing range-cell and crossing Doppler-cell problem in long time must be solved to avoid the integration loss. A moving compensation method based on Keystone transform and Dechirping was researched in the case the crossing-beam impact can be neglected. A detecting flow for multiple targets using the Clean method was proposed. The method proposed in this paper was verified by the simulating data and the outfield experimental data processing. Results show that it can be used for target detection of ubiquitous radar.]]></description>
<pubDate>2012/8/28 16:33:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Yue,ZOU Jiangwei and CHEN Zengping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Yue,ZOU Jiangwei and CHEN Zengping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006003]]></guid><cfi:id>352</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Joint Time-Space Target Detection and DOA EstimationAlgorithm on Ubiquitous Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006004]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A joint time-space target detection and DOA estimation algorithm on ubiquitous radar is proposed. First, data received by antenna array was transformed from array space to beam space by digital beam-forming based on DFT. Then, the time domain detection was performed with the trace of covariance matrix. In the end, the direction of arrival was estimated by multistage  Wiener filter. The simulation results show that the method proposed by this paper has a better performance on time domain detection and precision of DOA.]]></description>
<pubDate>2012/8/28 16:33:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[BAO Qinglong,ZHANG Yue,WU Tong and CHEN Zengping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>BAO Qinglong,ZHANG Yue,WU Tong and CHEN Zengping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006004]]></guid><cfi:id>351</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Denotation by Visual Modality in Plane for Three-dimensionalImaging with Real Data of Broadband Mono-pulse Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006005]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to solve the problem that three-dimensional imaging result with real data of broadband mono-pulse radar cannot be displayed directly, an expressive method using visual modality in plane was studied. The visual modality in plane is the projection of target structure which was obtained by hypothetic people's eyes when they observed target according with direction of radar beam. In order to obtain the expression with visual modality in plane, firstly, the method for calculating direction of radar beam from real data was given and the necessity for obtaining the beam direction was analyzed by considering the exact estimation of target's size. Secondly, under the basis of having obtained the direction of beam, a new reference frame was formed according to the plane for projection and the method of coordinate rotation from reference frame in radar observation to new reference frame was also presented. In the end, three-dimensional imaging results of some real data for planes in civil aviation were presented with projection in reference frame in radar observation and visual modality in plane in new reference frame respectively, the comparison between two kinds of expression brings forth the value of denotation by visual modality in plane for acquisition of characteristic.]]></description>
<pubDate>2012/8/28 16:33:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GAO Lei,HUANG Xiaohong and CHEN Zengping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GAO Lei,HUANG Xiaohong and CHEN Zengping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006005]]></guid><cfi:id>350</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Digital Quadrature Demodulation of Wideband Radar Based on Nonuniform-sampling]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Flexibility and simplicity are key points in designing a digital quadrature demodulator, which is an important part of wideband radar digital receiver. In this paper, we proposed a new implementation of digital  quadrature demodulation based on nonuniform-sampling, which is evolved from second-order sampling and multiphase filter. The structure of nonuniform-sampling was presented, and its effectiveness was verified by simulation results. Compared with low-pass filter and multiphase filter, nonuniform-sampling obtains more optimized structure and better performance in real-time processing. This novel approach will offer potential for better resolution in designing a wideband radar digital receiver.]]></description>
<pubDate>2012/8/28 16:33:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SU Shaoying,HOU Qingkai and CHEN Zengping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SU Shaoying,HOU Qingkai and CHEN Zengping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006006]]></guid><cfi:id>349</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Radar Target Integrated Recognition AlgorithmBased on DSm Theory]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[An integrated recognition algorithm based on DSm theory is presented to solve target recognition problems of digital multi-purpose  radar. First, various recognition results were placed in a unified frame of discernment and the classic DSm rule was applied to combine them. Then the Proportional Conflict Redistribution (PCR) rule was used to redistribute the combination results. Finally, the decision rule based on generalized basic belief assignment (GBBA) was adopted. The simulation results show that this method can avoid information loss caused by the hierarchical recognition structure, and more abundant target information is included in the fusion results.]]></description>
<pubDate>2012/8/28 16:33:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Wanquan,XIN Yulin,BAO Qinglong and CHEN Zengping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Wanquan,XIN Yulin,BAO Qinglong and CHEN Zengping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006007]]></guid><cfi:id>348</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Characteristic Inversion of the Mid-course MissileBased on the Sphere-ellipse Model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper is for the identification of the RCS sequence of the mid-course missile. On the basis of analyzing its motion and electromagnetic scattering characteristic, a new method using RCS magnitude changes with respect to the object gesture angle for inversing the mid-course object's two-dimensional length was presented. Compared with the traditional ellipse method, the new method overcomes the disadvantage of the necessity for the maximal and minimal RCS value of the object. The experiment results tested by the simulated and darkroom measurement of the representative missile object show the effectiveness of the method.]]></description>
<pubDate>2012/8/28 16:33:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Yuehui and GONG Shixian]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Yuehui and GONG Shixian</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006008]]></guid><cfi:id>347</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Performance Analysis and Optimal Design of AGC Circuitfor Large-dynamic-range GNSS Receivers on Satellite]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Good anti-jamming ability is required under “Navigation Warfare”. However, radio frequency circuit is one of the key parts affecting the anti-jamming performance of GNSS receivers. According to features of the GNSS receiver on satellite, and considering both weak signal receiving and strong signal receiving, this paper analyzed the method of calculating maximum Jammer-to-Signal Ratio(JSR) J<sub>max</sub> which the circuit can realize the gain of each circuit part, aiming at maximize JSR in the whole signal band. Further, the calculation method was simplified for a particular AGC circuit made of resistance network. Lastly, measured results were given for this kind of AGC circuit, which agrees well with the JSR target requirement 35dB. The analytical method can direct the design of not only GNSS receiver, but also various kinds of other receivers.]]></description>
<pubDate>2012/8/28 16:33:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Baiyu,SUN Li,WU Jun,ZHOU Li and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Baiyu,SUN Li,WU Jun,ZHOU Li and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006009]]></guid><cfi:id>346</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Anti-decoy in Anti-radiation Missile Using Joint Estimation of Polarizational and Spatial Domains]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201005013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The study proposed the polarization array in anti-radiation seeker, which uses joint estimation of polarizational and spatial domains anti-decoy by the differences of the target and decoy. At first, it estimated DOA (direction of angle) and polarimetric parameters of radar and decoys, the DOA supply to guide the ARM and the polarimetric parameters apply to discriminate the radar or decoys, for the purpose of preventing decoy. Then, the all-trajectory simulation on ARM against three point sources bait is accomplished by combining ARM motion equation and guide equation. Many experiments on all-trajectory simulation are done by Monte-Carlo. The simulation results demonstrate the effectiveness on anti-decoy in anti-radiation missile using joint estimation of polarizational and spatial Domains.]]></description>
<pubDate>2012/8/28 16:45:11</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Dijun,XU Zhenhai,LAI Qingfu,WANG Xuesong and XIAO Shunping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Dijun,XU Zhenhai,LAI Qingfu,WANG Xuesong and XIAO Shunping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201005013]]></guid><cfi:id>345</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Underdetermined Blind Separation of Non-disjoint CommunicationSignal in the Time-frequency Domain]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201005015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the problem of underdetermined blind separation of attenuated and delayed mixing communication signal, this paper proposed an algorithm based on shortest distance to estimate original signals, calculating the shortest distance from mixing signal vector to subspace spanned of mixture vector firstly. Then it estimated the number of active original signal simultaneously, translated the problem of underdetermined mixture into over-determined mixture, and completed the estimation of original signal by solving the over-determined equation. The efficiency of the algorithm is proved in theory. Computer simulations show that the proposed recognition algorithm is high in performance.]]></description>
<pubDate>2012/8/28 16:45:11</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LU Fengbo,HUANG Zhitao and JIANG Wenli]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Fengbo,HUANG Zhitao and JIANG Wenli</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201005015]]></guid><cfi:id>344</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Direction Tracking of Maneuvering Targets with MutuallyCoupled Antenna Array]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201005016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The problem of direction tracking of target with varying direction based on antenna array was addressed, and the effect of mutual coupling was also considered. By exploiting the special banded Toeplitz form of the mutual coupling matrix of uniform linear array, the technique of appending assistant antennas at each side of the original array was introduced for mutual coupling compensation. After that, particle filters were used to obtain real-time direction estimates of the maneuvering targets based on the mutual coupling-compensated array output. Numerical simulations were carried out, showing the satisfying performance of the proposed method in direction tracking.]]></description>
<pubDate>2012/8/28 16:45:11</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Xudong<sup>1</sup>,LIU Zhangmeng<sup>2</sup>,HUANG Zhitao<sup>2</sup> and XIONG Huagang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Xudong<sup>1</sup>,LIU Zhangmeng<sup>2</sup>,HUANG Zhitao<sup>2</sup> and XIONG Huagang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201005016]]></guid><cfi:id>343</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Switching-CFAR Detector Based on Greatest Selection]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201005017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For traditional CFAR detection, the detectors cannot adapt to homogenous and non-homogenous environment simultaneously, so a modified CAFR detector (IEGOS CFAR) is proposed based on greatest selection in this paper. Using the switching method, the local clutter power estimates in leading window and trailing window were obtained by choosing the reference cells adaptively, then the greatest of them was taken as the total clutter power estimate to realize the CFAR detection. Under the assumption of Swerling Ⅱ target and Rayleigh distribution clutter, the CFAR property was proved. Comparisons between CA, GO, SO ,OS and EXS detectors show that IEGOS owns better performance both in homogenous and     non-homogenous environment caused by interference and clutter edge.  The detector is suitable for application since no sample ordering is needed.]]></description>
<pubDate>2012/8/28 16:45:11</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GUO Yulan,OU Jianping,ZHANG Jun and WAN Jianwei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUO Yulan,OU Jianping,ZHANG Jun and WAN Jianwei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201005017]]></guid><cfi:id>342</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Study of Channel Interpolation for OFDM SystemsBased on Zero-padding DFT]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201005018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Channel interpolation methods based on zero-padding DFT for OFDM systems were investigated. Two conventional interpolation schemes for channel estimation were analyzed. Analysis shows that the two methods are equivalent, and zero padding can be used to reconstruct the channel impulse response samples of length N, where N is the number of total subcarriers. The reconstruction error of conventional zero-padding methods was discussed, and a new zero-padding method was proposed. Simulation results show that the above analysis is correct, and the reconstruction error of channel impulse response is decreased by the proposed method in some channel conditions. Furthermore, the channel interpolation with the proposed zero-padding method is robust to the distribution of path delay, and the performance of system is enhanced.]]></description>
<pubDate>2012/8/28 16:45:11</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SHI Feng<sup>1,2</sup>,HU Dengpeng<sup>1</sup>,WANG Chen<sup>2</sup> and ZHANG Eryang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHI Feng<sup>1,2</sup>,HU Dengpeng<sup>1</sup>,WANG Chen<sup>2</sup> and ZHANG Eryang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201005018]]></guid><cfi:id>341</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Robust Adaptive Beamforming with Sidelobe ControlBased on Worst-case Performance Optimization]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201005019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A sidelobe control method is proposed for robust adaptive beampattern based on worst-case performance optimization. Multiple quadratic inequality constrains are added to arbitrary sidelobe regions, which can achieve lower sidelobe level as well as adaptively suppress interference. The optimization model can be converted into convex second-order cone(SOC) programming issue, which can be solved efficiently using the existing interior point method. Simulation results demonstrate that in the case of beam pointing error, the approach proposed can obtain the prescribed low sidelobe without performance loss.]]></description>
<pubDate>2012/8/28 16:45:11</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[DAI Lingyan<sup>1,2</sup>,LI Rongfeng<sup>2</sup>,WANG Yongliang<sup>2</sup> and BAO Zheng<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DAI Lingyan<sup>1,2</sup>,LI Rongfeng<sup>2</sup>,WANG Yongliang<sup>2</sup> and BAO Zheng<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201005019]]></guid><cfi:id>340</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Novel EBG Loaded Microstrip Antenna Array]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201004012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Microstrip antenna array mounted over electromagnetic bandgap (EBG) substrate was studied The EBG was mounted below the microstrip antenna array to replace the conducting ground plane of antenna array, which can widen the operational bandwidth and promote the gain of antenna array. The measured results show that the operational bandwidth of antenna unit is promoted from 3.81% to 8.86%, and in the operational band the gain of antenna array is over 10dB. Meanwhile the coupling coefficient between units of antenna array is reduced.]]></description>
<pubDate>2012/9/6 8:51:59</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Youquan,ZHANG Guangfu,FU Yunqi and YUAN Naichang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Youquan,ZHANG Guangfu,FU Yunqi and YUAN Naichang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201004012]]></guid><cfi:id>339</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study of Space time Frequency Processing forSpaceborne MIMO-GMTI Radar Based on Stepped FrequencyOrthogonal Waveform]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201004013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Synthesizing the multiple-channel and multiple-frequency techniques, the multiple-input multiple-output (MIMO) radar can provide a feasible approach for solving the problems in spaceborne GMTI, such as slowly-moving target detection, and blind speed zones reduction. Effective orthogonal waveform design is crucial for MIMO radar implementation. Therefore, based on an analysis of the performance of orthogonal waveform, with the application of GMTI, the optimized basic parameter choice criteria for stepped frequency orthogonal waveform of spaceborne MIMO radar was proposed. Then, the basic principle of combined space, time and frequency adaptive processing was studied. Finally, simulation results were presented to demonstrate the superiority of MIMO radar in improving clutter suppression and GMTI performance.]]></description>
<pubDate>2012/9/6 8:52:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZOU Bo,LAI Tao and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZOU Bo,LAI Tao and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201004013]]></guid><cfi:id>338</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Low Frequency SAR Multi-channel Equalization MethodBased on Subaperture Image]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201004014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[When the multi-channel SAR system is used for moving target indication, the imbalance in amplitude and phase among channels severely affects the performance of moving target detection and parameter estimation. For multi-channel low frequency SAR/GMTI system, a multi-channel equalization method based on subaperture image was proposed. The method makes use of multi-channel subaperutre images with the same view-angle, and estimates the amplitude and phase errors related to this view-angle at the same time. It can estimates the amplitude and phase errors accurately and adapts to the errors changing with the view-angle. The experiment based on vehicle-borne low frequency multi-channel SAR/GMTI real data demonstrates that this method can effectively compensate for the amplitude and phase errors among different channels and improve the performance of moving target detection.]]></description>
<pubDate>2012/9/6 8:52:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHOU Hong<sup>1</sup>,LOU Jun<sup>1</sup>,HUANG Xiaotao<sup>1</sup>,CHANG Yulin<sup>1,2</sup> and ZHOU Zhimin<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Hong<sup>1</sup>,LOU Jun<sup>1</sup>,HUANG Xiaotao<sup>1</sup>,CHANG Yulin<sup>1,2</sup> and ZHOU Zhimin<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201004014]]></guid><cfi:id>337</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Multi-frequency Fusion Based on Compressive Sensing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201004015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Traditional multi-frequency radar signal fusion can reconstruct full-band signal from some continuous sampled sub-band signals, and can improve range resolution and quality of range profile. But by the theory of Compressive Sensing, the more the incoherence between sampled matrix and measurement matrix is, the better the full-band signal can be reconstructed. Therefore, the performance of signal fusion based on random sampling is better than that of fusion based on continuous sampled theoretically. In the current study, traditional multi-band signal fusion was extended to random sampled signal reconstruction, and Basic Pursuit was used for reconstructing full-frequency signal. Then, the sufficient condition of successful reconstruction with high probability was presented. The experimental results prove the advantage of this fusion method.]]></description>
<pubDate>2012/9/6 8:52:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YE Fan,HE Feng,LIANG Diannong and ZHU Jubo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YE Fan,HE Feng,LIANG Diannong and ZHU Jubo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201004015]]></guid><cfi:id>336</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Automatic Modulation Recognition of Both Digital and AnalogCommunication Signals]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201004016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to automatically classify the modulation types of both digital and analog communication signals, nine feature parameters based on the first statistical moments of the received signals were proposed. All those feature parameters were calculated using the conventional signal processing methods. The calculation process is less complicated and it is suitable for real time online analysis. Next, an automatic modulation recognition algorithm based on the decision-theoretic approach was also developed and its realization was also presented in the form of a flowchart. Computer simulations shows that all the aforementioned types of communication signals have been recognized with an average success rate ≥97% at SNR≥9dB and the method proposed is suitable for the practical application of signal detection and fast recognition in         non-cooperation communication systems.]]></description>
<pubDate>2012/9/6 8:52:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Zhimin,OU Jianping,HUANGFU Kan and WANG Chunlei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Zhimin,OU Jianping,HUANGFU Kan and WANG Chunlei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201004016]]></guid><cfi:id>335</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Novel Method of Clutter Cancellation for MobileStepped-frequency Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201003014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Cancellation processing is one kind of classical and feasible idea for the purpose of cancelling clutter. A novel method of clutter cancellation for stepped-frequency radar was proposed. Transmitting the basic stepped-frequency waveform, the radar achieves two high resolution range profiles (HRRP) that were produced by the Inverse Discrete Fourier Transform (IDFT) of two frames of return pulses on a same range cell. The two HRRPs which the number of frame interval was chosen rationally were utilized to cancel the clutter, which can keep the HRRP property of a target. To resolve the problems of the clutter shift and the clutter component change induced by the radar platform movement, a strategy was also brought out. The clutter of two HRRPs was aligned by the clutter correlation and then was cancelled. The simulation results validate the correctness of the method.]]></description>
<pubDate>2012/9/6 8:52:15</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Feixing,HE Sisan,CHEN Jianjun and FU Qiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Feixing,HE Sisan,CHEN Jianjun and FU Qiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201003014]]></guid><cfi:id>334</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Stability and Robustness Analysis for Subspace TrackingBased on Reducing Computational Complexity]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201003015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[FDPM and FOOJA, which belong to the low complexity class, are the most efficient algorithms for principal or minor subspace tracking. Reducing computational cost is crucial for guaranteeing the real time implementation. Under lower computational complexity background, it was found that there exist two other simplified methods (FDPM＿1st＿col and FOOJA＿1st＿col) through analysis of FDPM and FOOJA. Under the finite word length condition, the stability and numerical robustness were analyzed and compared with the former two algorithms. Simulation results verified our conclusion.]]></description>
<pubDate>2012/9/6 8:52:15</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[QIAN Linjie<sup>1,2</sup>,CHENG Zhu<sup>1</sup>,SHI Binbin<sup>1</sup> and WAN Jianwei<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>QIAN Linjie<sup>1,2</sup>,CHENG Zhu<sup>1</sup>,SHI Binbin<sup>1</sup> and WAN Jianwei<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201003015]]></guid><cfi:id>333</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Angle Estimation for Seeker-steering with Active ConicalScanning MMW Antenna]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201003019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Active MMW seeker can locate and track the target by emitting high-frequency pulse, and possess satisfying adaptability to suddenly cut-off radar while conical scanning is one of the effective seeker-steering systems. This paper aims to distill from the echo of the target location-related angles via Flourier Transformation, for these angles can be used to revise the attitude and course of the seeker timely, so that the target is kept in sight commendably. Numerical simulations were carried out to verify the satisfying performance of the proposed method.]]></description>
<pubDate>2012/9/6 8:52:15</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[FENG Daowang,LU Qizhong,CAO Dongbo and LIU Zhangmeng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FENG Daowang,LU Qizhong,CAO Dongbo and LIU Zhangmeng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201003019]]></guid><cfi:id>332</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A New Timing Synchronization Method for OFDM Systems Based onRepeated-Conjugated-Symmetric Preamble]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201003020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new timing synchronization method for OFDM systems based on repeated-conjugated-symmetric preamble was proposed. The proposed timing method utilized delayed correlation and symmetric correlation to search the first tap of multipah channel with the fixed threshold after the peak position of timing metric was detected. Theoretic analysis shows that the proposed method can achieve good performance of timing synchronization. Simulation results in static multipath channel and 6-path channel for typical urban show that the proposed method prevents the timing synchronization from moving backward and achieves more accurate timing result than conventional timing synchronization method based on conjugated-symmetric timing metric.]]></description>
<pubDate>2012/9/6 8:52:15</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SHI Feng<sup>1,2</sup>,WANG Chen<sup>2</sup>,ZHOU Zhu<sup>1</sup> and ZHANG Eryang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHI Feng<sup>1,2</sup>,WANG Chen<sup>2</sup>,ZHOU Zhu<sup>1</sup> and ZHANG Eryang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201003020]]></guid><cfi:id>331</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design and Integration of the Front End RF for theRadiated Radar Target Simulator]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201003021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The front end RF for radiated radar target simulator was designed and integrated in this paper. This simulator was operated on the L/S/X three bands, and it supported the CW and pulse operation. It generated multi-targets in high precision. The plug module structure design improved the EMC and the extension performance of the RF front end. The measured results of the system are better than the target. Furthermore, this RF front end supports the radar simulator finish the target simulating for the real radar successfully, which verifies the performance of this radar simulator.]]></description>
<pubDate>2012/9/6 8:52:15</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHAO Fei,WANG Shengshui,CHAI Shunlian,LIU Haitao and MAO Junjie]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAO Fei,WANG Shengshui,CHAI Shunlian,LIU Haitao and MAO Junjie</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201003021]]></guid><cfi:id>330</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Performance Comparison of Phase Detector in NavigationReceiver's Tracking Loop]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Costas loop is usually used in navigation receiver as carrier tracking loop, so many analyses have been made about coastas loop. Traditional analysis is based on unitary signal power multiplicative detector, and the loop bandwidth is considered constant no matter what the signal to noise ratio is. In this paper, two kinds of phase detectors are precisely modeled and analyzed. The pll thermal noise formula is given and proved by simulation. If the signal to noise ratio is lower than 4dB, the performances of the two detectors are almost the same, the signal to noise ratio threshold of tracking is almost the same. The results of this paper can be used to design the satellite navigation receiver.]]></description>
<pubDate>2012/9/19 9:01:23</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[TANG Xiaomei<sup>1</sup>,XU Pengcheng<sup>2</sup> and WANG Feixue<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TANG Xiaomei<sup>1</sup>,XU Pengcheng<sup>2</sup> and WANG Feixue<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002016]]></guid><cfi:id>329</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Extracting of Radar Words in Modeling ofMulti-function Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Radar word is a fixed arrangement of finite number of pulses that can reflect the work modes and threat levels of hostile multi-function radars. To deal with the problem of radar words extraction with reference to dropped pulses and false pulses, this paper proposes a new extracting method based on three-level matching (TLM) algorithm, which can first perform a coarse search by identifying the radars from the radar template library that have character parameters similar to those present in the deinterleaved pulse stream of the emitter, and then make use of the technology of pulse pairing and sequence cross correlation for precise identification. A number of simulations are presented to demonstrate the radar words extracting capability of the TLM algorithm. Simulation results show that the proposed algorithm can not only extract the radar words correctly, but also have better adaptability to noisy environment.]]></description>
<pubDate>2012/9/19 9:01:23</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Haijun<sup>1</sup>,Fan Yun<sup>2</sup>,LI Yue<sup>3</sup>,LIU Zheng<sup>1</sup> and ZHOU Yiyu<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Haijun<sup>1</sup>,Fan Yun<sup>2</sup>,LI Yue<sup>3</sup>,LIU Zheng<sup>1</sup> and ZHOU Yiyu<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002017]]></guid><cfi:id>328</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Hybrid PSTD/FVTD Method for Mixed-scaleElectromagnetic Problems]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A hybrid technique combining the Pseudo-Spectral Time-Domain method with the Finite-Volume Time-Domain method is presented to solve 3-D    mixed-scale problems, which contain both electrically large and relatively homogeneous regions and electrically small fine details in computational electromagnetics. FVTD is suitable for electrically small problem but suffers from large numerical errors for electrically   large-scale regions. The PSTD method, on the other hand, is accurate and efficient for regions with large and relatively homogeneous materials, but is low in efficiency for electrically small structures. The hybrid method overcomes disadvantages and unites advantages of either method mentioned and is potentially more useful. A least square based quadratic polynomial reconstruction method is developed for FVTD to reduce the reflection brought by the boundary of the algorithms, then an overlapping grids scheme and a no overlapping grids scheme are presented. Numerical examples demonstrate that the method proposed enjoys high level of precision and strong capability in region analysis.]]></description>
<pubDate>2012/9/19 9:01:23</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[DENG Cong,PENG Da,YIN Wenlu,CHAI Shunlian and MAO Junjie]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DENG Cong,PENG Da,YIN Wenlu,CHAI Shunlian and MAO Junjie</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002018]]></guid><cfi:id>327</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of Lower Bound for the Error Probability of LinearBlock Codes over the AWGN Channel]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A lower bound on the error rate of linear binary block codes (under maximum likelihood decoding) over BPSK-modulated AWGN channels is proposed in the current study. The essence of the optimization to the lower error rate bound is to optimize the lower bound on the union probability of finite events. Combined with the optimizing rule of the improved Dawson-sankoff bound, we obtain the judge rule of the redundant error events and obtain the calculation expression about lower bound of SER which solely depends on the Hamming weight enumerator function of the code and the signal-to-noise ratio (Eb/N0). The algorithm can get the tighter lower bound and has lower complexity than the de Caen's kind bound and the KAT kind bound, which has been proved by the numerical results applying to LDPC codes and the others.]]></description>
<pubDate>2012/9/19 9:01:23</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Ba<sup>1</sup>,HE Yingliang<sup>2</sup>,YANG Shaohua<sup>3</sup>,ZHANG Zhongming<sup>1</sup> and ZHANG Eryang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Ba<sup>1</sup>,HE Yingliang<sup>2</sup>,YANG Shaohua<sup>3</sup>,ZHANG Zhongming<sup>1</sup> and ZHANG Eryang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002019]]></guid><cfi:id>326</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Error Suppressing in Passive Radar Seeker Using Velocity Measurement of Inertial Navigation System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to enhance the angle measurement accuracy in passive radar seeker (PRS) restrained by weight volume, a novel Extended Kalman Filter (EKF) using missile-to-target relative state is proposed in this paper. Missile-to-target relative position was described by several relative state variables, including range, line-of-sight azimuth and elevation angle. Missile-to-target relative motion model was then established by using velocity measurement of Inertial Navigation system (INS). This approach can fully take advantage of onboard INS information, thus offering favorable PRS measuring error suppressing. It has practical application in enhancing missile strike precision, attacking performance as well as the ability of anti-target losing. The approach proposed is validated by the simulation in a representative scenario.]]></description>
<pubDate>2012/9/19 9:01:23</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Yi<sup>1</sup>,ZHAO Jing<sup>1</sup>,DONG Hongyan<sup>2</sup>,FENG Dejun<sup>1</sup> and WANG Guoyu<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Yi<sup>1</sup>,ZHAO Jing<sup>1</sup>,DONG Hongyan<sup>2</sup>,FENG Dejun<sup>1</sup> and WANG Guoyu<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002020]]></guid><cfi:id>325</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Application of MLFMA in Doppler Echo Simulation withMotion Body Target]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A method based on quasi-static and  Multi-level Fast Multi-pole Algorithm (MLFMA) is introduced to compute the micro-Doppler echo by motion body targeting with arbitrary shape. The joint time frequency analysis algorithm is used to calculate some typical motion's micro-Doppler echo. Furthermore, efforts were made to extract the instantaneous frequency and then compare it with the point target's instantaneous frequency in accord with the same  micro-motion. The results indicate that they share the same trend and the current method is efficient.]]></description>
<pubDate>2012/9/19 9:01:23</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XIANG Daopu,ZHOU Dongming and HE Jianguo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIANG Daopu,ZHOU Dongming and HE Jianguo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002021]]></guid><cfi:id>324</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Real-time Processing of Airborne Ultra-wide Band SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201001011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Large data volume and computation burden are the main characteristics of real-time ultra-wide band synthetic aperture Radar (UWB  SAR) processing. The nonlinear chirp scaling (NCS) algorithm adopted in the real-time processing needs large data volume. In order to reduce the data volume demand, an improved NCS algorithm is proposed. Meanwhile, the flow of Real-time UWB SAR processing is given, and the effect of forward velocity error is also analyzed, and it can be removed by real-time pulse repeat frequency (PRF) adjusting. The performance of loss of sight (LOS) compensation in improved NCS algorithm based on the data measured is analyzed. Finally, the performances of the algorithm are verified by the simulation and real UWB SAR data]]></description>
<pubDate>2012/9/19 9:01:36</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Jianyang<sup>1</sup>,CHANG Wenge<sup>1</sup>,WANG Liang<sup>2</sup> and LI Yueli<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Jianyang<sup>1</sup>,CHANG Wenge<sup>1</sup>,WANG Liang<sup>2</sup> and LI Yueli<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201001011]]></guid><cfi:id>323</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Application of the Parallel Time Domain Adaptive Integral Method to Transient Scattering from Electrically Large Objects]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201001012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The high computational complexity and large memory requirements will be encountered when the transient responses from electrically large complex objects are considered using time domain integral equation (TDIE) numerical technique. Time domain adaptive integral method (TDAIM) is employed for reducing the computational scale of TDIE. The parallel technology was researched and the distributed electromagnetic computation based on .NET Remoting was implemented. Results show that the parallel scheme is effective for improving computational efficiency and solving the large scale electromagnetic problem.]]></description>
<pubDate>2012/9/19 9:01:36</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Wenju,ZHOU Dongming,LI Ying,HE Jianguo and LIU Peiguo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Wenju,ZHOU Dongming,LI Ying,HE Jianguo and LIU Peiguo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201001012]]></guid><cfi:id>322</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An Accurate Baseline Estimate Method for RuggedTerrain Utilize Rough DEM]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201001014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Baseline estimation is important to generate accurate DEM with SAR interferometry. A novel method for baseline estimation was introduced after an initial review of classical methods. The SRTM DEM and coarse orbital parameter were first used to produce a topographic-free residual interferogram. Accurate orbital parameter was then achieved by spatial-frequency analysis of the residual interferogram. This method has the advantage of spatial and precise orbital free ability. Validation was carried out with ERS-1/2tandem data over the Mani mountain area of Tibet. Some representative methods of baseline estimation were then compared with the method introduced and the results showed more accurate estimation.]]></description>
<pubDate>2012/9/19 9:01:36</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WEI Haijun<sup>1</sup>,ZHU Jubo<sup>2</sup> and LIANG Diannong<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WEI Haijun<sup>1</sup>,ZHU Jubo<sup>2</sup> and LIANG Diannong<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201001014]]></guid><cfi:id>321</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Spatial Polarization Characteristics of ElectronicallyScanning Dipole Phased Arrays Antenna]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201001016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The spatial polarization characteristic of electromagnetic field radiated by linear dipole array and planar-array antenna scanning in different direction was derived and modeled theoretically and mathematical in this paper. The calculation results and simulation analysis show that the polarization properties of phased arrays in various beam positions are diverse, and the polarization state of EM wave will change with the azimuth and elevation of the electrical boresight when the target direction deviates from the antenna boresight direction. The conclusion is of significance to high-precision modeling and simulation for phased array antennas, and is also important for anti-interference by making use of polarization information.]]></description>
<pubDate>2012/9/19 9:01:36</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[DAI Huanyao<sup>1</sup>,LI Yongzhen<sup>1</sup>,CHEN Zhijie<sup>2</sup>,WANG Xuesong<sup>1</sup> and XIAO Shunping<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DAI Huanyao<sup>1</sup>,LI Yongzhen<sup>1</sup>,CHEN Zhijie<sup>2</sup>,WANG Xuesong<sup>1</sup> and XIAO Shunping<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201001016]]></guid><cfi:id>320</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Low Frequency Wide Band SAR/GMTI Experimental System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201106012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Low frequency wide band SAR/GMTI has the capabilities of reconnaissance, surveillance and imaging for stationary and moving targets in the area open or concealed by foliage. A low frequency wide band SAR/GMTI system, developed by National University of Defense Technology, was introduced in detail as well as the information processing procedures. Important issues in the procedures such as spectrum correction, imaging and channel equalization were discussed. Three GMTI methods-STAP, DPCA combined with ATI and image domain STAP-were chosen in consideration of the low frequency property in the system. It is verified through the outfield experiment that the system can effectively suppress clutter, detect moving target and estimate its motion parameters.]]></description>
<pubDate>2012/9/12 11:15:10</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHOU Zhimin,ZHOU Hong,LEI Pengzheng,HUANG Xiaotao,CHANG Yulin,ZHU Guofu and FAN Chongyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Zhimin,ZHOU Hong,LEI Pengzheng,HUANG Xiaotao,CHANG Yulin,ZHU Guofu and FAN Chongyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201106012]]></guid><cfi:id>319</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Study of the Conformal Array Pattern SynthesisIncluding Mutual Coupling]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201106014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[An improved mutual coupling modified projection method was proposed, based on the two stacked patches back cavity microstrip conformal array model. The method was applied for synthesizing the patterns of this kind of conformal array successfully. The amplitude and phase of the element exciting can be solved at one time, by means of introducing the generalized element pattern including the location information. Meanwhile, the concept of the element active pattern was combined with the least square method to simplify the solved process for mutual coupling matrix. Moreover, the phase pattern was also considered, which improved the reliability of the synthesis method. Besides, the perfect agreement between the synthesized results and full-wave method confirms the validity of the proposed method.]]></description>
<pubDate>2012/9/12 11:15:10</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHAO Fei,QI Huiying,XIAO Ke,CHAI Shunlian and MAO Junjie]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAO Fei,QI Huiying,XIAO Ke,CHAI Shunlian and MAO Junjie</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201106014]]></guid><cfi:id>318</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Statistically Optimal Power Allocation and Relay Selection in Cooperative Networks]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The average outage probabilities of the amplify-and-forward (AF) relaying and the decode-and-forward (DF) relaying with/without diversity in Rayleigh fading were analyzed respectively, and the analytical expressions were presented. To minimize the average outage probability, with total transmit power constraint, the statistically optimal power allocation problem of the AF relaying and DF relaying were considered, and also the analytical expressions are provided. Then the statistical optimal relay selection was suggested to further minimize the average outage probability. Though the analytical expressions of power allocation for AF and DF with diversity were obtained under the condition of high transmit SNR, the simulation results show that they are also valid in the low transmit SNR region. Compared with fixed power allocation, the statistical optimal power allocation effectively reduces the average outage probability. Meanwhile, the optimal relay selection further reduces the average outage probability.]]></description>
<pubDate>2012/8/28 11:51:54</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Lijie,XI Yong,TANG Yi and WEI Jibo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Lijie,XI Yong,TANG Yi and WEI Jibo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105021]]></guid><cfi:id>317</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Novel Method for Image Registration in InISAR Imaging Based on Phase Correction]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aimed at the image registration problem in interferometric inverse synthetic aperture radar (InISAR), the causation of the offset between two ISAR images for different interferometric antennas along one baseline was analyzed. Then a quantitative analysis of the offset and its influence on the following interferometric processing was discussed. It was shown that the sub-pixel offset in the down-range direction and the pixel offset in the Doppler (cross-range) direction induced mismatching of two ISAR images. A novel image registration method based on phase correction was proposed to solve the mismatching problem in InISAR imaging. Simulation results demonstrate that the offset between two ISAR images is compensated effectively when the proposed new method is used, achieving an improvement of the quality of three-dimensional (3-D) image consequently.]]></description>
<pubDate>2012/8/28 11:51:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Chenglan,GAO Xunzhang,HE Feng and LI Xiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Chenglan,GAO Xunzhang,HE Feng and LI Xiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105022]]></guid><cfi:id>316</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Influence Analysis of Narrowband Hypothesis to GNSS Array Anti-jamming Performance Evaluation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The traditional method analyzes the anti-jamming biases by using narrow-band model Hypothesis. On the other hand, next-generation GNSS signals using wider bandwidth make the broadband effect more obviously. Therefore, the impact of narrow-band assumptions needs to be re-examined. This research derives the precise model under the case of DBF processing, and the conclusion is that the array response equals to the inner product of spatial steer vector and the Kroneck product of time steer vector and weights of taps. The research also analyzes the array anti-jam performance biases by narrowband assumption under the multiple factors. The results show that the main reason is the distortion of array response. When JSR is 70dBc, the maximum error introduced by narrow-band approximation model is about 5dB. The intenser the jamming, the bigger the error. At the same time, the error introduced by the above precise model is about 0.5dB.]]></description>
<pubDate>2012/8/28 11:51:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[NIE Junwei,GE Rui,LI Min and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>NIE Junwei,GE Rui,LI Min and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105024]]></guid><cfi:id>315</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Distinguishing the Towed Radar Active Decoy and Target Based on the Separation in Doppler]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Distinguishing the decoy and the target is the fundamental problem in countering the Towed Radar Active Decoy (TRAD) jamming. In the course of TRAD jamming, the triangular geometry relationship among the missile, the target and the decoy changes. That brings about the differences of Doppler frequency between decoy and target. Thus it provides the possibility to distinguish the target and decoy in frequency domain. Based on the analysis of the frequency separability in the head-on attack and chase attack scenarios, the L class of Wigner Ville Distribution (LWVD), with the advantages of improving the azimuth resolution and inhibiting the cross terms, was adopted to separate the target and decoy. Then by combining the auxiliary information of echo characteristics and attack scenarios, the identity recognition between the target and the decoy was achieved. The simulation results validated the availability.]]></description>
<pubDate>2012/8/28 11:51:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SONG Zhiyong,ZHU Yilong,XIAO Huaitie and LU Zaiqi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SONG Zhiyong,ZHU Yilong,XIAO Huaitie and LU Zaiqi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105025]]></guid><cfi:id>314</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design and Implementation of Target Echo Signal Simulator for Interferometric SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The Target Echo Signal Simulator (TESS) for interferometric SAR was designed and implemented. The TESS can make a hardware-in-loop simulation loop with radar working in interferometric bistatic mode. It recorded the transmitting signal of the master satellite in real-time, supplemented the scene modulation information off-line, and played back the radar echo of master and slave satellite according to the radar PRF. The high digital IF transmitting and receiving technique was used to achieve better harmonic, clutter and carrier suppression performance. The on-line loop correction technique was adopted to correct the amplitude and phase mismatch of TESS in real-time. The measured results show that the indexes of TESS satisfy the design requirements, and the TESS meets the needs of practical engineering of the hardware-in-loop simulation for interferometric SAR.]]></description>
<pubDate>2012/8/28 11:51:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HE Zhihua,HE Feng,HUANG Haifeng and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HE Zhihua,HE Feng,HUANG Haifeng and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105026]]></guid><cfi:id>313</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Direction of Arrival Estimation of Far-field CoherentSignals Using Joint Diagonalization]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new algorithm for direction of arrival (DOA) of coherent signals using joint diagonalization was proposed. A set of higher-order cumulant matrices were first devised, the generalized array manifold matrix was then estimated using the technology of joint diagonalization. Finally, permutation uncertainty inherent in the estimation of the generalized array manifold matrix was eliminated and DOAs were estimated, based on the matrix structure of the array manifold matrix and properties of minimum polynomial of matrix. The proposed algorithm does not need angle searching, and can be applied to the cases when some DOAs in different coherent group are the same. The effectiveness of the proposed algorithm is verified by computer simulation results.]]></description>
<pubDate>2012/8/28 10:29:47</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HU Zenghui<sup>1</sup>,ZHU Jubo<sup>2</sup>,HE Feng<sup>1</sup> and LIANG Diannong<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Zenghui<sup>1</sup>,ZHU Jubo<sup>2</sup>,HE Feng<sup>1</sup> and LIANG Diannong<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104013]]></guid><cfi:id>312</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Anti-jamming Approach of the Anti-ship TerminalRadar Aided by INS Information]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Featured characteristic of inertial navigation system (INS) information, as short-term accuracy, ultra stability and self determination, cannot be disturbed by electromagnetic interference. In light of these traits, a novel information processing approach aided by INS position and velocity information for anti-jamming application was proposed,. Based on missile-to-target relative motion model，during the terminal guidance tracking phase of anti-ship missile (ASM), target position and velocity information could be obtained by extended Kalman filtering to suppress seeker random measurement errors. When the jamming was detected, one can combine target position forecast with INS navigation solution to accomplish the homing guidance of ASM, which could help achieve one's purpose of anti-jamming. Simulation was carried out in the presence of a maneuvering ship target, and it shows that this method is effective and feasible because of its preferable anti-jamming performance.]]></description>
<pubDate>2012/8/28 10:29:48</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LAI Qingfu,LIU Yi,ZHAO Jing,FENG Dejun and WANG Xuesong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LAI Qingfu,LIU Yi,ZHAO Jing,FENG Dejun and WANG Xuesong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104017]]></guid><cfi:id>311</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Novel Blind Multiuser Detection Scheme with KroneckerSpreading Code]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[When the multiple-access interference (MAI) in DS-CDMA system is very strong, the performance of adaptive blind multiuser detection in the system will degrade significantly. The normal way of solving this problem is increasing the length of spreading code. However, the improvement is limited. This study proposed a novel blind multiuser detection scheme with Kronecker spreading code, which is generated by the kronecker product of normal spreading code. Theoretical analysis and simulation show that the Kronecker spreading code has much more capability of resisting MAI than the normal spreading code, which has the same length of the Kronecker spreading code. Therefore, the Kronecker spreading code performs much better in the adaptive blind multiuser detection.]]></description>
<pubDate>2012/8/28 10:29:48</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HE Feng,YUAN Jibing,DING Hong and ZHENG Linhua]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HE Feng,YUAN Jibing,DING Hong and ZHENG Linhua</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104018]]></guid><cfi:id>310</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An Analytical Algorithm for Inter-Satellite VisibilityCalculation with Restriction of Satellite Antenna's Elevation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Analytical algorithm for inter-satellite visibility is essential for quantitative analysis of constellation visibility characteristic, which is important for the design of inter-satellite link (ISL) assignment scheme and the design of satellite network topology of autonomous navigation system. Analytical algorithm of inter-satellite visibility is necessary for a satellite to assign ISL autonomously with others. Based on the restriction of scanning range of satellite annular antenna, this study introduced the rules to decide satellites' visibility. According to the Walker constellation's spatial structure and satellite's motion law, it introduced an analytical algorithm of satellite's visibility with satellites in the same obit and different obit. Using the algorithm above to analyze satellites' visibility in Galileo constellation, the simulation results show that in the same and different obit plane each satellite has four visual satellites under the elevation restriction of ［25°, 65°］. The algorithm is also available for the analysis of other circular-like constellation.]]></description>
<pubDate>2012/8/28 10:29:47</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SHI Leiyu<sup>1</sup>,OU Gang<sup>1</sup>,GU Qingtao<sup>2</sup> and ZHU Xiangwei<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHI Leiyu<sup>1</sup>,OU Gang<sup>1</sup>,GU Qingtao<sup>2</sup> and ZHU Xiangwei<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104019]]></guid><cfi:id>309</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An Analysis of the Performance of Global Positioning and  TimingService Effected by Partially Turning off Navigation Signals forPreventing Timing Service in Local Area]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the navigation war, the prevention of timing service to adversaries in local area can be realized by turning off all the navigation signals of visible satellites artificially. This study takes turning off the navigation signal for preventing the timing service in local area as an example, describing the simulation process of prevention of timing service by turning off the navigation signal in local area, and puts forward the evaluation method of positioning and timing performance as well. The effect of preventing timing service on the performance of global positioning and timing service is analyzed subsequently. The results imply that, with the prevention of timing service in local area by partially turning off the navigation signal, both positioning and timing service are limited to the civilian users around the site, and the accuracy of positioning will become worse in the global area. Moreover, the availabilities of positioning and timing will be decreased in global area under the circumstance of partially turning off the navigation signal for preventing the timing service in local area.]]></description>
<pubDate>2012/8/28 10:29:48</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[PENG Jing,NIE Junwei and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PENG Jing,NIE Junwei and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104021]]></guid><cfi:id>308</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Practical Turbo Decoding Algorithm on Rayleigh Fading Channels]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[It is confirmed by theoretical analysis and simulation results that, whether the Rayleigh fading channel is perfectly estimated or not, the  Max-Log-MAP algorithm is independent of the channel signal-to-noise ratio (SNR).In addition, the Max-Log-MAP algorithm does not depend on any other channel parameter. By scaling the soft output, the Max-Log-MAP decoder performs nearly as well as the Log-MAP decoder, while this gain is achieved without any complexity increase. As no channel parameter estimator is needed, from a practical point of view, decoding turbo codes on the Rayleigh fading channels with the Scaled Max-Log-MAP algorithm is a good compromise among the performance, the complexity and the system robustness.]]></description>
<pubDate>2012/8/28 10:29:48</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Ke,WAN Jianwei and WANG Ling]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Ke,WAN Jianwei and WANG Ling</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104022]]></guid><cfi:id>307</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Fast Blind Recognition Method of RS Coding]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to get the error-correcting coding information of the unknown lines in digital communication, a fast blind recognition method of   Reed-Solomon(RS) coding is presented. RS coding length, the order of the primitive polynomial and the possible primitive polynomials were detected by seeking the roots of binary form of RS codes. The true primitive polynomial and generator polynomial of the unknown line were gained by the position and number of the connective zeros in the Galois Fields Fourier Transform (GFFT) of RS codes using the possible primitive polynomials. The results of experiments and performance analysis show that this method can blind recognize the RS coding of the great mass of unknown lines, and can obviously reduce the number of primitive polynomials searched in the recognition compared with the existing algorithms.]]></description>
<pubDate>2012/8/28 10:29:48</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LV Xizai,SU Shaojing and HUANG Zhiping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LV Xizai,SU Shaojing and HUANG Zhiping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104024]]></guid><cfi:id>306</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[SAR Tomography Based on Simulated Interferometric Phase]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201103021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Synthetic Aperture Radar (SAR) Tomography extends the capability of SAR systems and allows reconstructing the height profile of observed scene. The deramping, one of important processes of SAR tomography, was investigated and a new deramping method based on simulated interferometric phase was proposed. This method can avoid extra atmosphere phase and obtain excellent deramping result using low precise elevation of the target, so it facilitates SAR Tomography. Finally, the validity and availability of this method is validated by the results obtained by processing real data.]]></description>
<pubDate>2012/9/13 9:40:51</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SUN Xilong<sup>1</sup>,YU Anxi<sup>1</sup>,DU Haidong<sup>2</sup>,DONG Zhen<sup>1</sup> and LIANG Diannong<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SUN Xilong<sup>1</sup>,YU Anxi<sup>1</sup>,DU Haidong<sup>2</sup>,DONG Zhen<sup>1</sup> and LIANG Diannong<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201103021]]></guid><cfi:id>305</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Radar Platform Motion Characteristics and TheirEffect on Range Profile]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201103025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Analysis of how motion characteristics of radar platform influence imaging is the premise of researching on motion compensation, detection, recognition and tracking methods. Aiming at the problem of radar platform motion characteristics and its effect on range profile, the study firstly analyzed the motion characteristics of radar platform, gave an LFM signal model based on motion platform, and quantitatively analyzed the influence on range profile which result from the motion characteristics of the radar platform. It is concluded that, under the condition of general radar platform, the micro-motion of platform influencing the radial velocity/acceleration can be ignored; the translational-motion of platform is the main factor influencing the range profile, the micro-motion of platform have little influence on range profile; radial acceleration influencing the range profile can be ignored. Finally, the simulation results verify the correctness of conclusion.]]></description>
<pubDate>2012/9/13 9:40:52</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Zheng<sup>1,2</sup>,ZHANG Yi<sup>3</sup> and FU Qiang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Zheng<sup>1,2</sup>,ZHANG Yi<sup>3</sup> and FU Qiang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201103025]]></guid><cfi:id>304</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Data Collection Approach Based on Mobile Sink in Wireless Sensor Networks]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the hot issue about the sink node in most traditional data collection protocols in wireless sensor networks, the study presented a data collection method using mobile sink. Data collection problem was decoupled to a dominating set construction and travelling salesman problem. A distributed algorithm was presented for constructing dominating set. According to the result set, approximate algorithm was used to generate a path for sink. Simulation results show that the approach proposed can reduce communication overhead and balance the load.]]></description>
<pubDate>2012/8/28 10:30:14</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Tao,GUO Deke,LUO Xueshan and CHEN Honghui]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Tao,GUO Deke,LUO Xueshan and CHEN Honghui</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102012]]></guid><cfi:id>303</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Influence of Radar Location on the Measurability ofMicro-doppler Detecting for Precession Target]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[With the purpose of detecting micro-Doppler under the background of missile confrontation, the influence of the radar location was researched. It was proved in theory that when the dimension and the dynamic parameters of the precession target are invariable, the micro-Doppler is only determined by the angle which is between the radar sight and the precession axis called the average sight angle. In the research, the change of the average sight angle and the micro-Doppler bandwidth caused by different locations of radar was studied. At the same time the simulation results in the typical scenarios were shown in figures, which validated the ideas. The conclusion of this paper will benefit how to deploy the radar for detecting ballistic targets.]]></description>
<pubDate>2012/8/28 10:30:14</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[MA Liang,WANG Xuesong,LI Yongzhen and WANG Tao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>MA Liang,WANG Xuesong,LI Yongzhen and WANG Tao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102013]]></guid><cfi:id>302</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Parameter Designing of Random Shifted Phase-coded MCPCRadar Signal]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Multi-Carrier Phase-Coded Signal (MCPC) has caught much attention of researchers recently. The flexible structure enables its balanced and adjustable performance, while enhancing the demand of parameter designing. Current designing methods can hardly achieve satisfied ambiguity diagram and envelope control simultaneity, and they mostly perform the research with less sub carriers. This research proposed a random shifted phase-coded MCPC signal, whose ambiguity diagram is ideal thumbtack shaped. To deal with its fluctuating envelope time-frequency clipping iteration was brought forward, after which optimizing method was used to further reduce the side lobes of auto cross function (ACF). Simulation results show that the designed signal keeps ideal ambiguity diagram and low PMEPR at the same time, while maintaining good ACF on sub carriers. Compared with reported MCPC at present, this signal is more suitable for practical use in radar.]]></description>
<pubDate>2012/8/28 10:30:14</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[DENG Bin,WEI Xizhang and LI Xiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DENG Bin,WEI Xizhang and LI Xiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102016]]></guid><cfi:id>301</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Estimation of the Sources Number in the UnderdeterminedMixture Signals Based on Spatial Time-frequency Distribution]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the problem of estimation of the sources  number in the underdetermined mixture signals, this paper propose a algorithm based on spatial time-frequency distribution (STFD) and singular value decomposition (SVD) without the assumption of sparsity and independence. First, the time-frequency distribution matrices corresponded to the auto-source TF points was stacked in three-order tensor, then the entries of the tensor stacked in matrix and SVD on this matrix was performed to finish the estimation of the sources number. The efficiency of the algorithm was proved in theory. Computer simulations show that the proposed recognition algorithm is high in performance.]]></description>
<pubDate>2012/8/28 10:30:14</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LU Fengbo,HUANG Zhitao and JIANG Wenli]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Fengbo,HUANG Zhitao and JIANG Wenli</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102017]]></guid><cfi:id>300</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Application of Information Geometry to Target Detection forPulsed-doppler Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Information Geometry, a new subject originated from differential geometry,  studies the statistics problem in manifold and metric space, and serves as a new solution method for the problem involved in radar signal processing and data processing. In the current study , radar echoes were modeled as the complex multivariate Gaussian distribution, and a kind of CFAR detector was proposed based on the Riemannian geometric structure of the manifold, and the false alarm probability and detection probability was analyzed. Simulations show that the detection performance of the information geometry method was better than the traditional coherent accumulation method for the small pulse number case. The findings of the research will be helpful to improve the detection performance of mechanical scan radar system at low PRF work mode.]]></description>
<pubDate>2012/8/28 10:30:14</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Junkai,WANG Xuesong,WANG Tao and QU Longhai]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Junkai,WANG Xuesong,WANG Tao and QU Longhai</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102018]]></guid><cfi:id>299</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Interference Suppression by Subspace Projection Technique Based on Block Triangularize Decomposition in GNSS Receiver]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102032]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Subspace obtained by SVD is fit for complex interference and few sample, but computation of this method is large. A new subspace projection approach was proposed. It relaxed the requirement of the diagonal matrix in SVD to block lower triangular matrix and reduced the computation while the anti-jammer performance was not affected. The block lower triangular matrix can be computed by Givens rotation. Givens rotation has modular structures and is suitable for parallel computation. Based on the characters of GNSS signal, noise and jammers, it is applied to interference suppression in GNSS receiver. The numerical simulation demonstrates that the performance is effective.]]></description>
<pubDate>2012/8/28 10:30:14</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SHI Binbin<sup>1,2</sup>,WANG Zhan<sup>1</sup>,QIAN Linjie<sup>1</sup>,CHENG Zhu<sup>1</sup> and HUANGFU Kan<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHI Binbin<sup>1,2</sup>,WANG Zhan<sup>1</sup>,QIAN Linjie<sup>1</sup>,CHENG Zhu<sup>1</sup> and HUANGFU Kan<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102032]]></guid><cfi:id>298</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Imaging Analysis of Random Step Frequency Radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201101013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The random step frequency signal shares the characteristics of the step frequency radar and the wideband noise radar. It not only reduces the instantaneous band-width and data sampling rate, but also has the good characteristics of the low probability of intercept, the electromagnetic compatibility and the radio-frequency immunity. The statistic characteristics of correlation output and ambiguity function like first moment，second moment, and variance were analyzed, and the radio-frequency immunity of the random step frequency signal was compared with linear stepped frequency signal in this paper. The SAR imaging algorithm based on the Correlation-Output and Range-Doppler algorithm was presented and analyzed, and the simulation result verified the validity.]]></description>
<pubDate>2012/8/29 10:50:39</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[PENG Suiyang,ZHANG Jun and SHEN Zhenkang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PENG Suiyang,ZHANG Jun and SHEN Zhenkang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201101013]]></guid><cfi:id>297</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modeling and Analysis of Motion Errors of AirborneUltra-wide Band SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201101014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Airborne Ultra-Wide Band Synthetic Aperture Radar (UWB SAR) has larger integrated angle and longer synthetic aperture, which gives rise to more complexity in motion errors. In light of this, first the motion model of airborne UWB SAR was derived. Then, the expression of echo spectrum in presence of motion error was deducted. Theoretic analysis on the reason of the motion error impacts on SAR imaging and the influences on SAR images induced by the different motion errors were carried out. Experiment results on simulated data proved the validity of the theory analysis presented in this paper.]]></description>
<pubDate>2012/8/29 10:50:39</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[AN Daoxiang,HUANG Xiaotao and ZHOU Zhimin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>AN Daoxiang,HUANG Xiaotao and ZHOU Zhimin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201101014]]></guid><cfi:id>296</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Evaluation of Multipath Mitigation Performances Based on  Error Envelope]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201101015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Multipath error is one of the last obstacles for GNSS performance improvement, and accordingly multipath mitigation techniques are 
developed rapidly. However, there is a lack of evaluation rules for the multipath mitigation performance. Three evaluation criteria based on the multipath error envelope were proposed; the multipath error formulae for both ELS technique and Double-delta technique were derived for the first time; hence calculation expressions of the multipath mitigation performance evaluation for the above two techniques and narrow correlator technique were presented. This research can be used as a guideline for the parameter design of multipath mitigation techniques in GNSS receiver.]]></description>
<pubDate>2012/8/29 10:50:39</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Huicui<sup>1,2</sup>,Cheng Xiao<sup>1</sup>,NI Shaojie<sup>2</sup> and WANG Feixue<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Huicui<sup>1,2</sup>,Cheng Xiao<sup>1</sup>,NI Shaojie<sup>2</sup> and WANG Feixue<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201101015]]></guid><cfi:id>295</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Multiple Moving Observers Passive Localization withDOA and FDOA Measurements]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201101016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For hybrid direction of arrival (DOA) and frequency
 difference of arrival (FDOA) passive localization, a fast and effective algebraic solution is proposed. This method converts the emitter position nonlinear estimation problem into two weighted linear least-squares minimization, which simplifies the emitter localization process. The proposed means does not have the search procedure, so it has less computational load than traditional search method. Furthermore, it is also more convenient, because it does not need the initial value of the emitter as in the Gauss-Newton iterative method. In structure, the
 observation equations were first established. And then the Cramér-Rao Lower Bound (CRLB) of the emitter's position estimation was presented. Moreover, the procedures and theoretical performance of the algebraic solution were given. Finally, the simulation was conducted. The results show that the location error of the algebraic solution approaches the CRLB at moderate measurement noise level.]]></description>
<pubDate>2012/8/29 10:50:39</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[JIA Xingjiang,ZHOU Yiyu and GUO Fucheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIA Xingjiang,ZHOU Yiyu and GUO Fucheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201101016]]></guid><cfi:id>294</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Dual Unscented Filter for Reentry Target Real-time Tracking]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201101017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Proper dynamic models and estimation methods are crucial factors to achieve a nice tracking performance for a reentry target. First, the dynamic model of maneuver reentry vehicle was chosen for reentry target tracking, and the tracking problem was equivalent to the simultaneous estimation of the state and the parameter. Then, the relativity of the state and the parameter were discussed by numerical examination. Next, for the information lost caused by the assumption of a deterministic input vector in the original dual unscented filter, an improved dual unscented filter based on a random input vector was proposed, and a detail accuracy analysis was achieved in theory. Finally, the accuracy, applicability and ability for processing incomplete data were validated by simulations.]]></description>
<pubDate>2012/8/29 10:50:39</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Ye<sup>1</sup>,ZHU Jubo<sup>2</sup> and LIANG Diannong<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Ye<sup>1</sup>,ZHU Jubo<sup>2</sup> and LIANG Diannong<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201101017]]></guid><cfi:id>293</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Effects of Motion on Adaptive Array in Satellite
Navigation Systems]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201101020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Adaptive algorithms of antenna arrays usually focus on the optimal performance under stable conditions. If GNSS receivers are mounted on moving subjects (such as bombards, aircrafts, vehicles or ships), the movement or turbulence of the platform can make the “null” direction mismatch the interferer direction. The current researchis paper firstly establisheds an array signal model under platform motion, which wais classified into two types: the first motion type (high frequency turbulence) and the second motion type (stable tilting), Then it developeds the analytic formula of array output Signal-to-Interference-plus-Noise ratio (SINR) under two types of motion models. Simulation results show that the array output SINR is more sensitive to the arriving angle of the interferer than to its power, which is because the antenna usually forms narrow and deep nulls. For a 7-element antenna array with one element at center and other elements in a circle around the center, when the arriving angle of the interferer changes by 3 degrees, the loss of SINR reaches 3.3 dB. Improving weight updating rates and widening the null width are both effective means in improving the robustness of the anti-jamming antenna arrays.]]></description>
<pubDate>2012/8/29 10:50:39</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZENG Xianghua,LI Min,NIE Junwei and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZENG Xianghua,LI Min,NIE Junwei and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201101020]]></guid><cfi:id>292</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The correntropy based maximum average correlation height filter]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201206027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Maximum average correlation height (MACH) filter is formulated by linearly combining the training data, which is statistically optimum and fairly robust for finding targets in clutter when the Gaussian assumption holds. This research proposes a nonlinear extension to the MACH filter by correntropy function which can induce a new feature space. Thus it is possible to construct linear filter equations in the new space, and the proposed filter has an improved performance due to the nonlinear relation between the feature space and input space. The algorithm is applied to synthetic aperture radar image recognition and exhibits better performance under peak-sidelobe-ratio and receiver-operating-characteristic criteria.]]></description>
<pubDate>2013/1/11 4:19:31</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YUAN Xiao,TANG Tao,LI Yu and SU Yi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YUAN Xiao,TANG Tao,LI Yu and SU Yi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201206027]]></guid><cfi:id>291</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A fast method for blind recognition of convolutional codes 
based on improved Euclidean algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201206028]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Blind recognition of convolutional codes is widely used in the fields of information interception, intelligent mobile communication and multicast communication. In order to solve the problem of fast recognition of convolutional codes, the classical Euclidean algorithm is improved, and a method for blind recognition of convolutional codes based on improved Euclidean algorithm is proposed. Code rate is searched first, the check polynomial of convolutional codes is solved through iterative process, and the convolutional codes can be identified quickly. Validity of the algorithm is verified by the simulation results, and computational load is less than the algorithms in the literature reviewed.]]></description>
<pubDate>2013/1/11 4:19:31</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XIE Hui<sup>1</sup>,WANG Fenghua<sup>1</sup>,HUANG Zhitao<sup>1</sup> and ZHANG Xixiang<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIE Hui<sup>1</sup>,WANG Fenghua<sup>1</sup>,HUANG Zhitao<sup>1</sup> and ZHANG Xixiang<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201206028]]></guid><cfi:id>290</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis and processing of the chaotic-based random stepped frequency signal]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201206029]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new radar signal, the chaotic based random stepped frequency signal, is proposed because of characteristics of chaos such as pseudorandom behavior, sensitivity for initial condition, accessibility for generation and control, and easy realization and processing for the stepped frequency signal. A signal model was introduced, then the ambiguity function and the cross correlation function were analyzed theoretically in detail, and two different echo signal processing methods were proposed finally. Numerical simulations based on four typical chaotic maps and two random series show that the designed signal is effective, and promising for radar application.]]></description>
<pubDate>2013/1/11 4:19:31</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YANG Jin,QIU Zhaokun,LI Xiang and ZHUANG Zhaowen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Jin,QIU Zhaokun,LI Xiang and ZHUANG Zhaowen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201206029]]></guid><cfi:id>289</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of code tracking loop accuracy under 
band limited condition]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201206030]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Code tracking loop is a key component of Global Navigation Satellite System (GNSS) receivers which determines the accuracy of positioning performance. So analysis for its theoretical performance has been a research hotspot for decades. Many productive conclusions have been derived. However, most researches consider the impact of band limited channels in frequency domain, which is too computational to be applied in practical situations. To lighten the computational burden, an analytical expression of code tracking accuracy with correlation functions was derived, and the performance of code tracking loop could be easily assessed with the derived expression, which has guiding significance in the design of GNSS receivers.]]></description>
<pubDate>2013/1/11 4:19:31</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[NI Shaojie,LIU Yingxiang,PANG Jing and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>NI Shaojie,LIU Yingxiang,PANG Jing and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201206030]]></guid><cfi:id>288</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Sparse signal reconstruction with noise measurements based on expectation minimization of  norm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Compressed Sensing (CS) is a new framework for simultaneous sensing and compression, and how to recover sparse signal form limited measurements is the key problem in CS. A fast and stable method, called Expectation Minimization of approximate  norm (abr. EML0), is proposed for sparse signal reconstruction with noisy measurements. The basic idea of the method is that sparse signal is recovered by minimizing the expectation of approximate norm, and then the expectation model by statistical character of noise is simplified so that the expectation model can be solved by the steepest descent method. Simulation results show that the proposed method provides better accuracy than existing methods at lower computational cost.]]></description>
<pubDate>2012/11/5 8:48:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Junhua,HUANG Zhitao and ZHOU Yiyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Junhua,HUANG Zhitao and ZHOU Yiyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205010]]></guid><cfi:id>287</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Filtering performance of alternate polarization array]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Considering the conditionality of the Polarization Sensitive Array (PSA) in realization, an original Alternate Polarization Array (APA) is proposed. The ultimate filtering performance is presented theoretically and numerically, which is contrasted with that of PSA comprehensively. Compared with the PSA, the filtering performance of APS approaches that of PSA, but the equipments and the degree of freedom is cut by half. The APA overcomes the disadvantages in implementation of PSA. Therefore, APA has great potential to be used in arrayed radar and other fields. ]]></description>
<pubDate>2012/11/5 8:48:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Zhenhai,ZHANG Liang,WU Dijun,XIONG Ziyuan and XIAO Shunping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Zhenhai,ZHANG Liang,WU Dijun,XIONG Ziyuan and XIAO Shunping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205011]]></guid><cfi:id>286</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modeling path capacity in IEEE 802.11-based multi-hop networks]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A closed analytical model is developed for the performance analysis of wireless multi-hop path. The research first analyzed the interference within the multi-hop path which is the cause of the intra-flow contention problem and derived the model for its quantitative calculation, and then it modeled the multi-hop path as a queuing network and derived its analytical model for performance analysis based on diffusion approximation method. Finally it calculated the capacity of the multi-hop path under the constraint of network stability. This model can be used to explore the transmission capacity of the multi-hop wireless networks and to analyze its ability to support QoS applications. The accuracy of the proposed model is validated through comparing the numerical results and the simulation results.]]></description>
<pubDate>2012/11/5 8:48:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SONG An<sup>1,2</sup>,ZHAO Haitao<sup>1</sup>,WANG Shan<sup>1</sup>,SHI Chunguang<sup>1</sup>,WEI Jibo<sup>1</sup> and FENG Minggang<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SONG An<sup>1,2</sup>,ZHAO Haitao<sup>1</sup>,WANG Shan<sup>1</sup>,SHI Chunguang<sup>1</sup>,WEI Jibo<sup>1</sup> and FENG Minggang<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205012]]></guid><cfi:id>285</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Data integration based on sub-covariance weighting for 
a three-satellite TDOA-based location system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To integrate multiple location estimates obtained at different time instants by a three-satellite TDOA-based passive location system, a method based on sub-covariance weighting is proposed. Based on the outcomes of the location precision analysis of a single estimate, the algorithm yields an integrated estimate of the spatial location through a two-step process: firstly, by using the inverse of the sub-covariance as the weighting matrix, it estimated two of the three coordinates through weighted least square (WLS); secondly, it calculated the last one coordinate by solving the WGS-84 ellipsoid model function of the earth. Simulations show that the proposed method, compared with the existing methods, can significantly increase the location precision.]]></description>
<pubDate>2012/11/5 8:48:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YE Haohuan,LIU Zheng and JIANG Wenli]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YE Haohuan,LIU Zheng and JIANG Wenli</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205013]]></guid><cfi:id>284</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[System parameter design of spaceborne TOPSAR 
and simulation verification]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[TOPSAR (Terrain Observation by Progressive Scans) is a novel spaceborne SAR mode for wide-swath observation, which solves the scalloping problem of ScanSAR though steering antenna beam in azimuth direction. The relationship between azimuth resolution and cycle time of TOPSAR was derived. Furthermore, the constraint of parameters was analyzed and the flow of engineering parameter design was presented. Finally, a TerraSAR-X like sample was provided and a simulation was conducted with the design result in SBRAS (SpaceBorne Radar Advance Simulator). The results show the effectiveness of the design.]]></description>
<pubDate>2012/11/5 8:48:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Qi,HUANG Haifeng,DONG Zhen,LIANG Diannong and HE Feng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Qi,HUANG Haifeng,DONG Zhen,LIANG Diannong and HE Feng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205014]]></guid><cfi:id>283</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Self-adapting arithmetic of decimation and synchronisation of space-based 
AIS signals based on energy measurement]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The arithmetic of decimation and synchronisation of Base-band signal is a key problem in space-based AIS(Automatic Identification System) processing. Aiming at the defect of the Detection of Striding across Zero and the Early-late Gate, a method to decimate and synchronise the base band signal based on energy measurement was proposed. We divided the base-band signal into segments with the same length according the rate of sampling and the rate of code, and then we calculated the measurement of corresponding sampling point of every segment. Finally we chose the sequence number of the maximum energy measurement as the best decimation and synchronisation sampling point, which has the character of maximum SNR. Numerical performance of the proposed methods performs better than the existing ones. ]]></description>
<pubDate>2012/11/5 8:48:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHU Shouzhong,LIU Zheng and JIANG Wenli]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHU Shouzhong,LIU Zheng and JIANG Wenli</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205015]]></guid><cfi:id>282</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Carrier tracking of weak GNSS signals based on FFT 
and navigation data estimation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In weak GNSS signal environments, due to navigation data bit, the dynamic of receiver and the quality of receiver’s oscillator, the traditional carrier loop cannot use long coherent integration time to enhance input SNR of the loop. A navigation data bits estimation method based on FFT is proposed, which just needs to calculate the FFT of one combination of data bits’ signs. The FFT of the received signal under any other data bits combination can be obtained through a few additions. The proposed method reduces the calculation complexity of navigation data bits’ signs estimation. Based on the estimation of the signs and bit edges of navigation data bits, the proposed method can adopt short coherent integration time samples over long time and FFT to discriminate doppler frequency error, which can overcome the SNR degradation introduced by receiver’s dynamic and doppler frequency estimation error over long coherent integration time and enhance the output SNR of the loop. Simulation results show that the proposed carrier tracking method can track carrier frequency in weak signal and low dynamic environments.]]></description>
<pubDate>2012/11/5 8:48:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Jianhui,ZHANG Xin,NI Shaojie,ZHANG Yonghu and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Jianhui,ZHANG Xin,NI Shaojie,ZHANG Yonghu and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205016]]></guid><cfi:id>281</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Method for emitter TDOA sorting based on recursive extended histogram]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In multiple platform electronic reconnaissance system, time difference of arrival (TDOA) can be used for pulse sorting. A method for TDOA sorting based on recursive extended histogram is proposed to deal with both the problem of misleading TDOA clusters caused by high pulse repetitive frequency (PRF) emitters and the problem of less pulse accumulation caused by ultra-low PRF emitters. TDOA data were formed into an extended histogram structure, which is processed recursively to detect and sort out the pulses of each emitter. By defining the extension operator, the misleading TDOA clusters could be removed, and the histogram noise level decreased step by step as well, so the method improved the performance of TDOA sorting effectively. Simulation results show that the method is applicable and effective.]]></description>
<pubDate>2012/11/5 8:48:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[MA Shuang<sup>1</sup>,WU Haibin<sup>2</sup>,LIU Zheng<sup>1</sup> and JIANG Wenli<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>MA Shuang<sup>1</sup>,WU Haibin<sup>2</sup>,LIU Zheng<sup>1</sup> and JIANG Wenli<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205017]]></guid><cfi:id>280</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Website topic structure and navigation induction]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Website topics, describing aggregation and classification of website information, embodying information logic structure, is crucial for website information analysis. Analysis of logical structure is the reverse process of website design. In order to accurately analyze the site topics, the research proposed a topic structure model describing the organizational forms, logic relations and related properties of different website’s topics in a formal way, providing the necessary theoretical basis for the topic oriented web information extraction. On this basis, navigation-based topic structure induction was proposed with algorithm and experimental analysis to automatically construct topic structure of websites. Experimental results show that topic structure model generalizes most of the site’s topic structural characteristics, while the navigation based topic structure induction can correctly establish the site's topic structure, and has a faster running time.]]></description>
<pubDate>2012/11/5 8:48:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YU Long and YIN Hao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YU Long and YIN Hao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205018]]></guid><cfi:id>279</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A novel approach to jointly estimate the DOA of the target and decoy within the radar beam]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The direction-of-arrival (DOA) estimation for target and decoy under the towed radar decoy jamming is the precondition to achieve correct selection of target. The fact that target and decoy both exist within radar beam causes the merging of the radar echoes aliasing and measurement, and leads the regular processing of observation extraction and parameter measurement to fail. Through utilizing the information about the unknown parameter embodying in the covariance matrix of conditional probability distribution of the sum/diff channel echoes, the explicit solution for the DOA estimation of target and decoy was obtained. In order to satisfy the need of relative power ratio (RPR) in the estimation processing, the twice joint estimation algorithm for DOA based on circular estimation of RPR utilizing the information about jamming detection, radar measuring and target tracking was proposed. Simulation results with different conditions proved the performance effectiveness of the proposed method.]]></description>
<pubDate>2012/11/5 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SONG Zhiyong,XIAO Huaitie,FU Qiang and LU Zaiqi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SONG Zhiyong,XIAO Huaitie,FU Qiang and LU Zaiqi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205019]]></guid><cfi:id>278</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Single channel signal separation algorithm based on cyclostationary filtering and Schmidt orthogonal cancellation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201204024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Single Channel Blind Signal Separation (SCBSS) is a hot and difficult topic in signal processing field. The feasibility of cyclostationary filtering applied in the single channel signal separation problem for the spectrally overlapping signals was analyzed, and then a separation algorithm based on frequency shift filter and Schmidt orthogonal cancellation was proposed. Firstly a source signal by frequency shift filter was extracted, then another source signal was estimated by subtracting the signal recovered from the mixture based on Schmidt orthogonalization. Simulation results indicate that, compared with the Wiener filtering technique, the proposed algorithm can separate radar and communication signals which are spectrally overlapping effectively and the proposed algorithm estimates the source signals with higher gain about 10dB. ]]></description>
<pubDate>2012/9/12 9:00:49</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Xiang,HUANG Zhitao and ZHOU Yiyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Xiang,HUANG Zhitao and ZHOU Yiyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201204024]]></guid><cfi:id>277</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Urban traffic scene understanding based on multi-level sigmoidal neural network]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201204026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Urban traffic scene understanding is the basis of traffic monitoring and safety driving assistant system. A novel approach to understanding urban traffic scene captured from a car-mounted camera is proposed based on multi-level Sigmoidal neural network. Five 3D structure features were combined with the appearance features to represent the urban traffic environment and the recognition accuracy of traffic environment was improved by utilizing multi-level Sigmoidal neural network(MSNN) to segment and recognize the input images. Tested by the public CamVid dataset, the experimental results demonstrate the efficiency of the proposed approach.]]></description>
<pubDate>2012/9/12 9:00:49</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[TAN Lunzheng<sup>1</sup>,XIA Limin<sup>1</sup> and XIA Shengping<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TAN Lunzheng<sup>1</sup>,XIA Limin<sup>1</sup> and XIA Shengping<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201204026]]></guid><cfi:id>276</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Coherent point drift method for SAR imagery scattering centers matching]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201204027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Scattering centers matching is currently the primary technique in SAR Automatic Target Recognition (ATR) using scattering centers. The difficulties in scattering centers matching originate in the inexactness of scattering centers and missing scattering centers. The recently developed Coherent Point Drift (CPD) method solves point pattern matching from the perspective of probability density estimation. In the CPD method, the inexactness of scattering centers and missing scattering centers can be well considered. The CPD method was introduced in this research to solve scattering centers matching. In order to improve the accuracy and stability of scattering center matching, the CPD method was modified to incorporate the prior information of vehicles’ azimuth estimation and scattering centers attributes. Experiments on MSTAR dataset show the validity of the proposed method.]]></description>
<pubDate>2012/9/12 9:00:49</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Zebing<sup>1,2</sup> and HU Weidong<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Zebing<sup>1,2</sup> and HU Weidong<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201204027]]></guid><cfi:id>275</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Two prediction architecture fused complex IR images background suppression algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the complex background suppression problem, a two-prediction-architecture fused complex IR images background suppression algorithm is proposed. In the local region of each pixel, the Nucleus Similarity Degree(NSD) is computed on the basis of the gray value similarity and spatial distribution correlation. Then, the outputs of two spatial filters with different structures are fused as the final background prediction result. Finally, the suppression is done by subtracting the prediction from the original image. The experimental result demonstrates that the proposed algorithm can get better performance in different complex IR images while the structure of the algorithm is simple, and it is suitable for engineering application.]]></description>
<pubDate>2012/8/28 10:28:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHAO Fei,ZHANG Zhiyong,XIAO Shanzhu and LU Huanzhang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAO Fei,ZHANG Zhiyong,XIAO Shanzhu and LU Huanzhang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203023]]></guid><cfi:id>274</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Spatial polarization characteristics of the single-polarization truncated cone phased array antenna]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For a single-polarization-truncated-cone-phased array antenna stimulated by horizontal or vertical polarized dipoles, the spatial polarization characteristics are modeled when the array antenna electronically scans in space. The theoretical analysis and simulations show that: the spatial polarization ratio of a single-polarization-truncated-cone-phased array monotonically increases as the angles between the pointing angles or observation angles and the normal increases; the spatial polarization ratio monotonically decreases as the slope angles decrease; the patterns of a single-polarization-truncated-cone-phased array are related to the polarization of array elements, the pointing angles, and the observation angles; the larger the size of a single-polarization-truncated-cone-phased array antenna is, the more abundant the spatial polarization information is. These conclusions offer a theoretical foundation for studies such as the polarization scattering matrix measurement, the polarization filtering, and the polarimetric anti-jamming based on the spatial polarization characteristics of the single- polarization-truncated-cone-phased array. The conclusions offer a theoretical basis for the studies such as the antenna design, the polarization characteristics analysis and the polarization calibration of the full-polarization-truncated-cone array as well.]]></description>
<pubDate>2012/8/28 10:28:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HE Mi,LI Yongzhen and XIAO Shunping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HE Mi,LI Yongzhen and XIAO Shunping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203024]]></guid><cfi:id>273</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A high resolution imaging method for SAR tomography]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the three-dimensional reconstruction of urban areas and man-made infrastructure, the urgent problem of SAR tomography is how to achieve satisfactory elevation resolution with a small number of non-uniform passes and preserve azimuth-range resolution simultaneously. An imaging method for SAR tomography based on RELAX algorithm is proposed in the framework of deterministic models. Compared with the spatial spectral estimation method that works statistically, this method does not need to deal with a spatial multilooking and maintains high resolution of direction dimension-distance dimension. Compared with the singular value decomposition method, this method has much better resolution of elevation dimension. Results obtained by processing simulated data and real data of ENVISAT-ASAR verified the promising potentiality of this imaging method.]]></description>
<pubDate>2012/8/28 10:28:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SUN Xilong,YU Anxi,DONG Zhen,SUN Zaoyu and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SUN Xilong,YU Anxi,DONG Zhen,SUN Zaoyu and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203025]]></guid><cfi:id>272</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[DOA estimation of correlated signals based on the adaptive algorithm in direct data domain]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A novel method for high resolution direction-of-arrival (DOA) estimation is proposed. The novel approach constructs the spatial spectrum by utilizing the steady-state weights of the adaptive algorithm in direct data domain instead of the noise subspace. The proposed method can solve the false peak problem effectively in the spectral peak search. The noise subspace can be closed with several groups of linear non-correlated steady-state weights from utilizing different reference signals. A practical method for the DOA estimation of correlated signals is also presented, which utilizes the symmetric conjugate vector in direct data domain. Compared with the conventional method, the proposed approach does not need to estimate the source number and the covariance matrix. As it does not need the eigendecomposition and only has a computational complexity of O(MP), it is a practical method for DOA estimation of correlated signals.]]></description>
<pubDate>2012/8/28 10:28:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YUAN Xiaodong<sup>1,2</sup>,WAN Jianwei<sup>1</sup>,CHENG Zhu<sup>1</sup>,SHI Binbin<sup>3</sup> and Xu Ke<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YUAN Xiaodong<sup>1,2</sup>,WAN Jianwei<sup>1</sup>,CHENG Zhu<sup>1</sup>,SHI Binbin<sup>3</sup> and Xu Ke<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203026]]></guid><cfi:id>271</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The power allocation of cooperative OFDM-basedamplify-and-forward STBC system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203028]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A cooperative orthogonal frequency division multiplexing (OFDM) system with a source and a non-regenerative relay transmitting according to Alamouti’s STBC is considered. The capacity of the system is analyzed and the analytical expression is presented. To improve the capacity of the individual power constrained system, a power allocation algorithm named as the Stepwise Iterative Power Allocation Algorithm (SIPAA) is proposed. The basic principle of SIPAA is that the water filling power allocation is implemented stepwise for both the source and the relay within iterations. To reduce the complexity of SIPAA, the object function is linearly processed before the water-filling power allocation, and the power vector is also linearly processed after the water-filling power allocation. It is confirmed by the simulation results that a significant system capacity improvement can be achieved by the proposed algorithm, compared with conventional equal power allocation algorithm. Moreover, the power allocation can be completed within a few iterations.]]></description>
<pubDate>2012/8/28 10:28:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Lijie<sup>1</sup>,TANG Yi<sup>1</sup>,HUANG Qinfei<sup>2</sup> and WEI Jibo<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Lijie<sup>1</sup>,TANG Yi<sup>1</sup>,HUANG Qinfei<sup>2</sup> and WEI Jibo<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203028]]></guid><cfi:id>270</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis and compensation of spaceborne SAR antenna array deformation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203031]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The beam output of deformed Spaceborne SAR antenna array and the deformation error compensation are studied. Considering the flexible antenna array which may be adopted in the future Spaceborne SAR,  a closed loop system for measuring and controlling of Spaceborne SAR antenna array’s deformation is proposed, and the steering vector model of deformed antenna array is presented. It was found that the mild deformation affect the beam’s sidelobe output more than the beam’s main-lobe. Then, the compensated weights were solved by the least square method, which can approximate the deformed antenna array outputs to the original antenna array outputs at most. Next, the deformed antenna array measuring precise demand was worked out. The validity of this method is verified by simulation.]]></description>
<pubDate>2012/8/28 10:28:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZENG Xiangneng<sup>1,2</sup>,HE Feng<sup>2</sup>,ZHANG Yongshun<sup>1</sup> and DONG zhen<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZENG Xiangneng<sup>1,2</sup>,HE Feng<sup>2</sup>,ZHANG Yongshun<sup>1</sup> and DONG zhen<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203031]]></guid><cfi:id>269</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A novel method for satellite-borne passive localization 
using interferometer and its error analysis]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203032]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The conventional line-of-sight (LOS) geo-location method using two-dimension interferometer on a satellite leads to heavy payloads and it is always under the effect of amplitude phase inconsistencies among receiving channels. A novel passive localization method is proposed, which merely needs two receiving channels to form a one-dimension interferometer on a spin-stabilized satellite. Rate of phase difference change was measured for emitter localization. A location algorithm based on particle swarm optimization (PSO) was designed. The impact of rotating speed and rotating plane of the interferometer on localization precision was analyzed. The results showed that localization precision can be improved by increasing rotating speed of the interferometer, the rotating plane should be perpendicular to the satellite position vector at the initial moment in order to get good localization precision in all directions around satellite projection point on the ground, and localization precision of the proposed algorithm can approach the Cramer-Rao lower bound (CRLB).]]></description>
<pubDate>2012/8/28 10:28:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Teng,GUO Fucheng and JIANG Wenli]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Teng,GUO Fucheng and JIANG Wenli</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203032]]></guid><cfi:id>268</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Efficient generation method of direct sequence spread spectrum simulation data]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201202013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Spread spectrum technology has been widely used in the field of communication and satellite navigation. Traditional methods to generate simulation data have heavy computation burden, ignoring the channel factors and other issues. Considering characteristics of spread spectrum systems signals and noise, a  fast and efficient method is presented to generate signals based on spreading code chip and band-limited Gaussian noise based on AR model. Compared with the conventional high-precision methods, the complexity of calculation decreased from 1GHz rate to chip rate, and maintained the flexibility of signal generation and channel factors control at the same time. This research can be used in the simulation of modern GNSS receivers.]]></description>
<pubDate>2012/8/28 10:27:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[NI Shaojie,XU Xiaoyong,Ge rui and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>NI Shaojie,XU Xiaoyong,Ge rui and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201202013]]></guid><cfi:id>267</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of spectral separation impact on RDSS System inbound capacity with bandwidth limit]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201202014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Inbound user capacity is an important specification of RDSS system design, which is mainly limited by the inbound signal multiple access interference. To improve the spreading code rate can increase the corresponding inbound capacity. However, the satellite transponder bandwidth limits the maximum spreading code rate, which limits the maximum capacity of inbound signals with a single spread spectrum. As the satellite transponder bandwidth is limited, a spread spectrum separation method was proposed to increase inbound capacity. The situation of separating the spread spectrum into two and three was analyzed respectively. thus obtaining the optimal value of spreading code rate in the both cases. Simulation results show that the existing transponder bandwidth separated into two spreading spectrums can increase inbound capacity 29%, the spectrums which separated in to can increase inbound capacity 37%.]]></description>
<pubDate>2012/8/28 10:27:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Jingyuan,LI Yuanling,MOU Weihua and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Jingyuan,LI Yuanling,MOU Weihua and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201202014]]></guid><cfi:id>266</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A high-precision and real-time interpolation method for satellite orbit in GNSS]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201202015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at solving the real-time computation of the satellite orbit in GNSS (Global Navigation Satellite System) emulator with multiple constellations, the Newton and Hermite polynomial interpolation algorithms were analyzed and compared by computing efficiency and accuracy. The precision of the satellite position and velocity (PV) performed better by adding “window” in the Newton algorithm. The computation examples show that the real-time and high-precision computation of the satellite PV is achieved with position at the equation interval epoch known and velocity unknown. The results also show that the new method speeds up the computation seven times faster than the direct ephemeris calculation, and yeilds better performance in orbit precision than the 3-order Hermite Interpolation, for the position error is less than millimeter and the velocity error 1e-5 m/s.]]></description>
<pubDate>2012/8/28 10:27:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[TONG Haibo,SHA Hai,ZHANG Guozhu and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TONG Haibo,SHA Hai,ZHANG Guozhu and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201202015]]></guid><cfi:id>265</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Multipath mitigation performance evaluation of quasi-coherent code correlation reference waveform technique in band-limited receiver channels]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201202016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Code Correlation Reference Waveform has been the research hotspot for its flexibility and outstanding multipath mitigation performance in GNSS receivers. But the analysis from the literature related usually assumes that the single-side bandwidth is infinite or much larger than the chipping rate and only specified waveform has been studied, thus there is a lack of quantitative results for modern band-limited receivers. Based on the CCRW principle, the formulae and design constraints for the discriminator curve of any reference waveform were derived. The multi-path error envelopes of quasi- coherent W2/W4/W5 waveforms were studied. Simulation results indicate that W4/W5 outperforms the W2 algorithm. A QPSK (10) prototype receiver developed for GPS L5 and Galileo E5a/E5b was tested with a GNSS simulator. Compared with Narrow Correlator, the multipath envelope area for a 3dB attenuated multipath signal has been improved by 63% and 72% for W2 and W5 respectively. This research can be used as a guideline for modern GNSS receivers.]]></description>
<pubDate>2012/8/28 10:27:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Kai,LI Jingyuan,ZHANG Yonghu and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Kai,LI Jingyuan,ZHANG Yonghu and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201202016]]></guid><cfi:id>264</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on GPS/RFID integration algorithm based on the optimal selection of RFID observations]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201202017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the typical urban environment, GPS standalone can hardly satisfy the requirement of continuous positioning, particularly in the weak signal or no signal environment. Fortunately, this problem can be solved by using the integration method based on GPS and non-LOS (Line of Sight) positioning such as RFID positioning. To solve the problem of computational load in the traditional GPS/RFID integration based on all selection of RFID observations, this research proposed an optimal selection method of RFID observations with the minimum positioning error under the weighted observation condition. The experiment results show that the geometric distribution of precision in the environments, such as shadow or blockage, can be improved by using the proposed method, and both availability and accuracy of positioning can be improved efficiently. Moreover, the computational load can be decreased dramatically through this proposed method.]]></description>
<pubDate>2012/8/28 10:27:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[PENG Jing<sup>1,2</sup>,LIU Zengjun<sup>1</sup>,ZHU Ming<sup>2</sup> and WANG Feixue<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PENG Jing<sup>1,2</sup>,LIU Zengjun<sup>1</sup>,ZHU Ming<sup>2</sup> and WANG Feixue<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201202017]]></guid><cfi:id>263</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An analysis of service performance for enhancing power of satellite navigation system based on mixed constellation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201202018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In navigation war, the technique of satellite power-enhancement has been an important measure to improve the viability of the satellite navigation system. With regard to the problem about how to maintain the navigation capabilities of Compass system for the territory of China and the surrounding area in the context of navigation war, this researcg presents a satellite navigation system power enhancement program based on mixed constellation and guidelines of best GDOP value. Then, the effect to the performance of coverage, availability and implementation complexity in area covered by power enhancement signals under different realization types was analyzed. The results from simulation show that ‘5GEO+4MEO’ combination of power enhancement can achieve all-time coverage with the avalibility level of 100% (GDOP<6.3) for our country’s territory and coastal regions. Furthermore, this scheme also has the quality of low complexity and good stability and can be introduced as a regional power enhanced options.]]></description>
<pubDate>2012/8/28 10:27:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LV Zhicheng,ZHANG Yonghu,LIU Zengjun and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LV Zhicheng,ZHANG Yonghu,LIU Zengjun and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201202018]]></guid><cfi:id>262</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Performance evaluation method for GNSS anti-jam antenna arrays based on the navigation service performance]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201202019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Statistical performance evaluation based on available ratio of antijam antenna array has been considered a common viewpoint for GNSS evaluation. But in some aspects, the traditional evaluation method has several deficiencies as follows: the first is the hypothesis of independent uniform distribution of signal DOA, which is not in accordance with the navigation constellation; the second is the single signal available ratio which is unable to meet the navigation requirements. Aiming at these two problems, the research extended the average available ratio of single signal to the average solution probability and navigation service availability which are associated with the navigation solution performance. Finally, the new index was validated by a simulation under the COMPASS navigation constellation.]]></description>
<pubDate>2012/8/28 10:27:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[NIE Junwei,GE Rui,LI Yuanling and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>NIE Junwei,GE Rui,LI Yuanling and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201202019]]></guid><cfi:id>261</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Signal parameter production algorithm based on frequency conversion and transmitting]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201202020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[As the technology of the dual-mode RDSS receiver with passive and active positioning function has been developing rapidly nowadays, the high precision simulator is strongly demanded. The simulator comprises the satellite orbit module, the target trajectory calculation module, the error calculation module, and the like. The production of signal parameters has been a crucial technique that must be solved for the RDSS signal simulator. However, compared with GPS system, RDSS satellite system is a transmitting system with transponder and frequency conversion, which gives rise to more complexity in RDSS signal parameter production. Therefore, for the transmitting satellite system, signal parameter production algorithm was proposed; the formulae for the Doppler frequency shift were derived for the first time. Simulated experiments were carried out, and the results verified the validity of the algorithm.]]></description>
<pubDate>2012/8/28 10:27:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHAN Jianwei,ZHANG kai,ZHANG Guozhu and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAN Jianwei,ZHANG kai,ZHANG Guozhu and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201202020]]></guid><cfi:id>260</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Feature extraction and classification of landmine based on time-frequency atom decomposition]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201201021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[It is important in military field to detect landmine using vehicle-mounted ultra band ground penetrating radar, which has the capability to detect landmines over large area. The extraction of steady features has been the crucial factor in the practical use of ultra-band ground penetrating radar. In light of this, a new feature extraction and classification method was proposed based on the time-frequency atom decomposition. The method extracted the two-dimension time-frequency image based on four-dimension scatter function. After analyzing the character of time-frequency image, the time- frequency atoms were used to decompose the one-dimension range profile of landmine. Several time- frequency atoms which could describe the time-frequency character of landmine were sent to hierarchy classifier as features. It was proved by real data that the method was applicable to vehicle-mounted ultra band ground penetrating radar. Compared with the conventional feature extraction algorithms based on time or frequency field, the proposed method can extract steadier feature and improve the performance of landmine detection effectively.]]></description>
<pubDate>2012/8/27 9:46:18</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SHI Yunfei,SONG Qian,JIN Tian and ZHOU Zhimin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHI Yunfei,SONG Qian,JIN Tian and ZHOU Zhimin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201201021]]></guid><cfi:id>259</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A novel ant-colony optimized QoS routing algorithm based on multiple transferring strategies for tactical MANETs]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201201022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[QoS routes searching in tactical MANETs is a NP-complete problem, to which the ant-colony optimization algorithm is an effective solution. To improve the efficiency of ACO based QoS routing algorithms, an ant-colony optimized QoS routing algorithm (MTS-AQRA) based on multiple transferring strategies was proposed. MTS-AQRA integrates link’s stability and route’s congestion into conventional QoS requirements in the process of routing. By utilizing the diversity of route-search ants and the concurrent route-searching result from the multiple transferring processes, MTS-AQRA can work rapidly and effectively to establish stable routes which satisfy the QoS requirements of certain services. Simulation results show that MTS-AQRA outperforms AODV, QoS-Aware ACO and AntHocNet in terms of packet delivery ratio, end-to-end delay, end-to-end throughput and route stability.]]></description>
<pubDate>2012/8/27 9:46:18</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[DU Qingsong<sup>1,2</sup>,ZHU Jiang<sup>1</sup> and ZHANG Eryang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DU Qingsong<sup>1,2</sup>,ZHU Jiang<sup>1</sup> and ZHANG Eryang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201201022]]></guid><cfi:id>258</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The method for selecting matching area of SAR image]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201201023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to select SAR matching areas with high matching accuracy and matching probability, the current study analyzed the error influence of INS and imaging parameters on the matching area, designed several kinds of rules for suitability analysis, and proposed a coarse-to-fine selecting method. The method fully considers the macroscopic and microcosmic requirements, and keeps it away from the difficulty of constructing predicting functions. Experiment results indicate that the method can select good matching areas in the SAR image matching system, and achieve an over 97% matching probability of the selected matching area.]]></description>
<pubDate>2012/8/27 9:46:18</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[REN Sanhai and CHANG Wenge]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>REN Sanhai and CHANG Wenge</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201201023]]></guid><cfi:id>257</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Application of AMC on small very-near radar detecting system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201201024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To solve the isolation problem of transmitting-receiving antenna in very-near anti-missile system, this research analyzed the equivalent model of AMC, which is made of high-impedance electromagnetic surface, and shows the relationship between its reflectance and phase offset. Then a novel method wa put forward to improve the isolation by the AMC and the experiments show that the method is able to make the isolation reach -80dB in a 200MHz band. So it has a good application value because of its simple structure and low cost.]]></description>
<pubDate>2012/8/27 9:46:18</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Quan,TAN Yuan,YANG Yong and YUAN Naichang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Quan,TAN Yuan,YANG Yong and YUAN Naichang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201201024]]></guid><cfi:id>256</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Impact of oscillator phase noise on carrier DPLL tracking performance in GNSS receiver]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201201025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Present analytical conclusion of GNSS carrier tracking digital phase-locked loop (DPLL) phase jitter due to oscillator phase noise is derived based on the linear model of analog PLL. It is, however, not able to reveal the relationship between phase jitter and the coherent integration time (CIT), and it cannot guide the high sensitivity and high precision carrier tracking DPLL parameter design effectively. Firstly, this research derived the power spectral density of white frequency and random walk frequency phase noise sequences output from the phase detector. Secondly, the formulae of phase jitter were obtained based on the DPLL linear model and verified by simulation. Finally, analytical and numerical analysis on the obtained phase jitter formulae was carried out. The analysis results show that, both of DPLL phase jitter due to white and random walk frequency noise increase as the CIT grows, and decrease firstly and then increase as the loop bandwidth grows. The phase jitter formulae and the conclusions, which describe the relationship between DPLL phase jitter and the loop bandwidth and the CIT, can be used as guideline for GNSS carrier tracking DPLL parameter design.]]></description>
<pubDate>2012/8/27 9:46:18</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Xiangyu,GONG Hang,ZHU Xiangwei and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Xiangyu,GONG Hang,ZHU Xiangwei and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201201025]]></guid><cfi:id>255</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Passive synthetic array algorithm using single sensor with phase noise effects]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201201026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The existing passive synthetic array algorithms all make too ideal assumptions on the way of sensor moving and cannot endure the influence of phase noise very well. So the current research firstly presents a general processing algorithm of passive synthetic array. By carefully analyzing the phase noise model, a new estimation means of maximum coherence time and valid synthetic sensor number is proposed and then the steering vector of passive synthetic array is reconstructed. Furthermore, an improved passive synthetic array algorithm based on the phase noise model is presented. Considering the effect of phase noise, the theoretical lower bound on the variance of DOA estimate of passive synthetic array is given by deducing the Cramér–Rao Bound. Simulation results show that the proposed algorithm can enhance the precision of DOA estimate effectively comparing with the existing algorithm.]]></description>
<pubDate>2012/8/27 9:46:18</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Jianpeng,LIU Zheng and JIANG Wenli]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Jianpeng,LIU Zheng and JIANG Wenli</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201201026]]></guid><cfi:id>254</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Estimation of the projectile’s speed and attack angle using the digital streak photographic technique]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201201028]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A novel method using digital streak photography technique based on line-scan camera is proposed in order to circle out the problem in the digital improvement of the traditional streak facility in test range. The projectile’s stereo images were firstly collected by using a calibrated line-scan camera and a mirror, and then some special points were picked to compute the initial guess of the projectile’s velocity and attitude. The initial guess was further refined by using an optimization model established on the matching measure of the simulated and the real images contours. The speed and the attack angle were ultimately obtained. The accuracy of the estimation was experimentally tested.]]></description>
<pubDate>2012/8/27 9:46:18</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHAO Zhuxin<sup>1</sup>,HUI Bingwei<sup>1</sup>,WEN Gongjian<sup>1</sup> and LI Deren<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAO Zhuxin<sup>1</sup>,HUI Bingwei<sup>1</sup>,WEN Gongjian<sup>1</sup> and LI Deren<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201201028]]></guid><cfi:id>253</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Electromagnetic vortex based radar target imaging]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Amplitude/frequency/phase modulation of electromagnetic(EM) wave, as the common way of carrying information, has received intensive attention recently when the wave front acts as EM vortex for information modulation. The progress on the information modulation capability of EM vortex was systematically summarized and its potential on radar information acquisition was also introduced. Aiming at the circular phased array, the echo signal model of ideal point target was established under the illumination of EM vortex wave. Once the echo signal phase of each antenna element was shifted with the same mode as being applied for submission and integrated along the circular path, the output signal of the radar array can be obtained. The output signal can be modeled as the linear superimposition of Fourier basis with the amplitude modulated by squared Bessel function. According to the spectrum characteristic of Bessel function, the approximate dual relationship between the mode number of orbital angular momentum(OAM) and the variable of azimuthal angle was analyzed. Finally, the back projection(BP) algorithm and filtered FFT based algorithm were applied to image the target. Simulations show that electromagnetic vortex wave has the potential to acquire the cross-range profile of the radar target. The research may act as a reference for the design of new mechanism radar and the development of target recognition technology.]]></description>
<pubDate>2014/1/8 17:09:35</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GUO Guirong,HU Weidong and DU Xiaoyong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUO Guirong,HU Weidong and DU Xiaoyong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306013]]></guid><cfi:id>252</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Resolution analysis of MIMO SAR based on 
generalized ambiguity function]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In recent years, a new SAR concept based on Multi-Input Multi-Output (MIMO) configuration has drawn much attention. Firstly, a review was made about the development in the field under discussion. Then, the generalized ambiguity function of the conventional SAR into MIMO SAR case was extended. Next, a detailed analysis shows that the resolution of MIMO SAR not only depends on the parameters of the waveform and synthetic aperture length, but also depends on the array geometry of the multiple transmitters and multiple receivers. Simulations with a variety of parameter combinations demonstrate the derivation and analysis.]]></description>
<pubDate>2014/1/8 17:09:35</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHOU Wei<sup>1</sup>,CHEN Haowen<sup>1</sup>,LIU Yongxiang<sup>1</sup> and LING Yongshun<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Wei<sup>1</sup>,CHEN Haowen<sup>1</sup>,LIU Yongxiang<sup>1</sup> and LING Yongshun<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306014]]></guid><cfi:id>251</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A fast jamming method for false uniformly-moving 
scene against SAR-GMTI]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The deceptive stationary scene jamming is not effective for countering synthetic apreture radar (SAR) and ground moving target indication (GMTI) radar systems. To solve this deficiency, a method which transforms the stationary scene jamming signals to uniformly-moving scene jamming signals in real time is proposed. First, the echo models of moving target and stationary target were analyzed. Then, a formula which describes the relationship between moving target echo signal and stationary target echo signal was derived. Based on this formula, a three-implementation-step of this method was presented as delay operation in range time domain, stretching transformation in azimuth time domain and phase compensation. Next, the computational complexity was analyzed. Finally, the simulation results indicate that the proposed method is effective to produce false uniformly-moving scene，through which the stationary scene and important ground moving targets can be protected against SAR-GMTI.]]></description>
<pubDate>2014/1/8 17:09:35</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIN Xiaohong,XUE Guoyi and LIU Peiguo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIN Xiaohong,XUE Guoyi and LIU Peiguo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306015]]></guid><cfi:id>250</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A new landmine discrimination approach based on 
sequential aspect features
]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Low-frequency ultra-wideband synthetic aperture radar (UWB SAR) is a promising technology for landmine detection. According to the scattering characteristics of body-of-revolution (BOR) targets along with azimuth angles and incident angles, a Hidden Markov model (HMM) discrimination algorithm is proposed, using such sequential features as double-hump distance and notch frequency. First, the algorithm estimated the target scatterings in all azimuths based on regions of interest (ROI). Second, sequential aspect features were extracted by sparse time-frequency representation. Then the HMM parameters were trained with the labeled samples and the probability of occurrence was computed to discriminate suspicions targets. The experimental results indicate that the proposed algorithm is effective in BOR target discrimination. ]]></description>
<pubDate>2014/1/8 17:09:35</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Yuming,SHI Yunfei,WANG Jian,SONG Qian and HUANG Xiaotao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Yuming,SHI Yunfei,WANG Jian,SONG Qian and HUANG Xiaotao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306016]]></guid><cfi:id>249</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Anti-occlusion object tracking  based on two-level ISM model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A target tracking algorithm based on two-level implicit shape model is proposed to solve the tracking problem under occlusion and improve the location accuracy. Firstly, partial key points about the target and surrounding areas were extracted to build the codebook dictionary by Fast Hessian detector, and the feature description vectors of the codebook were constructed by SURF descriptor to establish the codebook support model. Secondly, the symbiotic relationship between the codebook dictionary set and target was established through the generalized Hough transform, and the online updating was accomplished by the implicit shape model. Finally, by finding the maximum value in the voting space, the target was located. According to the occlusion states in the tracking process, different voting weights were assigned to the codebook of target itself and surrounding area respectively, in order to improve the location accuracy under different occlusions. Experiments show the algorithm can locate the target robustly even though the target is occlusive, or even not visible, or returns to the field of view after missing.]]></description>
<pubDate>2014/1/8 17:09:35</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Luping,LI Biao,WANG Luping and HAN Jiantao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Luping,LI Biao,WANG Luping and HAN Jiantao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306017]]></guid><cfi:id>248</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Non-linearity compensation of air-modulated speaker 
based on the nonlinear filtered-x PEM algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aimed at the harmonic distortion problem in the air-modulated speaker(AMS), the AMS behavioral model was represented by a Hammerstein structure, and the research on predistortion of AMS based on this model was made. As the DC offset exists in the nonlinearity of the Hammerstein model, a predistortion algorithm considering the DC offset compensation was developed. The validity of the algorithm and the necessity of the DC offset compensation were verified by computer simulation. In the experiment, a single sinusoidal excitation signal was first used to identify the Hammerstein model. Then, using the identified system parameters, the NFxPEM algorithm was performed to obtain the parameters of Wiener predistorter and to predistort the excitation signal. From the experiment results, it is found that our approach is effective in reducing the harmonic power with a relatively small upgrade in the fundamental frequency power.]]></description>
<pubDate>2014/1/8 17:09:36</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHOU Zemin,ZENG Xinwu,GONG Changchao,TIAN Zhangfu and SUN Haiyang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Zemin,ZENG Xinwu,GONG Changchao,TIAN Zhangfu and SUN Haiyang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306022]]></guid><cfi:id>247</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Group targets generation against ISAR based on 
intermittent-sampling repeater jamming(ISRJ)]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201305024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A novel generation method of 2-D ISAR group targets is presented based on Intermittent-Sampling Repeater Jamming (ISRJ). Escort free-flight jammer was used to intermittently sample and repeater target echoes, which can generate vivid 2-D group targets in ISAR. By adjusting jammer and target’s relative space position, 2-D group targets are able to simulate target’s attitude angle dynamically. After the theory of ISRJ was expounded, the principle of escort free-flight jamming was introduced. A theoretical study was carried out to determine the requirement for power and position. Then the theoretical reason of 2-D group targets was emphatically analyzed. The key factor of false targets distribution and attitude angle was explored. Finally, the simulation demonstrates that the above method is effective. The results obtained from this research will help to provide better guidance for the design and engineering application of ISAR jammer.]]></description>
<pubDate>2013/11/6 15:57:52</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Letao<sup>1,2</sup>,FENG Dejun<sup>1,2</sup>,ZHANG Wenming<sup>2</sup> and WANG Xuesong<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Letao<sup>1,2</sup>,FENG Dejun<sup>1,2</sup>,ZHANG Wenming<sup>2</sup> and WANG Xuesong<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201305024]]></guid><cfi:id>246</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The scale adaptive feature compressed tracking]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201305025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to track target accurately during a long term in complicated environment, an adaptive scale feature compressed tracking algorithm is presented. A number of scanning windows with different scales and positions were obtained by construction constraint sampling. To reduce the feature dimension and improve the processing speed, the sparse random perceived matrices of different scales which can be easily computed offline were adopted to extract the features of different sampling image patches with relevant scales online. The sampling patch having a maximal classification score was regarded as the new tracking result by classifying the compressing feature via a naive bayes classifier and updating the parameters through online learning, which can realize the adaptive update of tracking location and scales. Experimental results show that the algorithm can adapt itself to the basic attitude and scale change, which is robust and does not depend on the scale selection of the initial tracking area.]]></description>
<pubDate>2013/11/6 15:57:52</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Luping,HAN Jiantao,LI Biao and WANG Luping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Luping,HAN Jiantao,LI Biao and WANG Luping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201305025]]></guid><cfi:id>245</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Reconstruction of array output and direction-of-arrival 
estimation via  L<sub>1</sub>-analysis sparse recovery]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201305026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The array manifold matrix was constructed as a redundant dictionary in which the array receiving signals were sparse through the appropriate spatial sparse division, and the corresponding L<sub>1</sub>-analysis sparse recovery model was established to reconstruct the array output data. The core of this paper is to prove that the manifold matrix is a tight frame and can satisfy the condition which guarantees the accurate recovery of signals through L<sub>1</sub>-analysis sparse recovery so that it is reasonable enough to use L<sub>1</sub>-analysis sparseness optimization to reconstruct the array output data. The upper bound of reconstruction error was given. The effectiveness of this presented method for improving the performance of DOA estimation with low SNR was verified by the experiments using the actual measurement data received in microwave darkroom through MUSIC algorithm.]]></description>
<pubDate>2013/11/6 15:57:52</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIN Bo,ZHANG Zenghui and ZHU Jubo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIN Bo,ZHANG Zenghui and ZHU Jubo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201305026]]></guid><cfi:id>244</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A multi-objective particle swarm optimization based 
virtual network embedding algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201305028]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aimed to the problem of unified resource optimized allocation in executing multi-virtual network embedding synchronously, a multi-objective particle swarm optimization based virtual network embedding method is proposed to increase the performance of resource utilization and global load balance of the substrate network resource. A multi-objective optimization model for virtual network embedding was put forward, on the basis of which the single virtual network embedding is considered as a swarm and the information exchange among different swarms so as to evolve corporately by employing multi-swarm coordination optimization method, and finally the increase of the performance of global resource allocation was achieved. The simulation results show that the proposed method maintains the best performance of the substrate network resource utilization ratio and virtual network request acceptance ratio compared with typical methods. ]]></description>
<pubDate>2013/11/6 15:57:52</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GUO Zhien,XUE Haiwei and DAI Yiqi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUO Zhien,XUE Haiwei and DAI Yiqi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201305028]]></guid><cfi:id>243</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The model of whole cycle mission planning for satellite observation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To solve the satellite observation planning problem for emergency tasks with timing limits, the process of satellite observation is analyzed, and a whole cycle mission planning model on satellite observation is proposed. The model integrates four phases of satellite observation, to satisfy the timing limits of satellite observation missions in emergency. A heuristic algorithm was suggested to solve the model, and an optimization adjustment strategy based on conflict queue was also proposed. Simulation results show that the model and algorithm are feasible for mission planning of satellite observation, and improving the mission accomplishment ratio of independent mission planning for each phase.]]></description>
<pubDate>2013/8/22 16:54:28</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Gang,WANG Jianjiang and LI Zhimeng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Gang,WANG Jianjiang and LI Zhimeng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304012]]></guid><cfi:id>242</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The edge point registration method of 
SAR images based on the joint similarity]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[An edge point matching method of SAR image based on the joint similarity is presented. First, the matching similarity criterion and the joint similarity——SSJF(Square Summation Joint Feature) were constructed, based on the grad and direction of each edge point in images. Next, a modified ROEWA edge detector was proposed to get the edge intensity and edge direction with the eight directional templates. Then, parameters of the transform model between the matching SAR images were calculated with the modified GA, which is used to obtain the global optimum solution of the similarity. Finally, the performance of the method was validated with SAR image registration experiments.]]></description>
<pubDate>2013/8/22 16:54:28</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Tianze<sup>1</sup> and LI Yan<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Tianze<sup>1</sup> and LI Yan<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304013]]></guid><cfi:id>241</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A new method of moving target detection and parameter 
estimation for spaceborne HRWS SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A ground moving target indication (GMTI) method for spaceborne high resolution wide swath (HRWS) synthetic aperture radar (SAR) systems is presented. First, the space time adaptive processing was adopted for clutter suppression followed by the traditional SAR imaging which yields the ambiguous images. Then all the moving targets including the real one and ghost ones were detected by the CFAR technique, and the real one was distinguished from all the imaging targets based on the space relationship of the ambiguous images. Finally, the moving velocity was obtained according to the azimuth position shift, which could be deduced from the range history of the moving target. The advantages of the method are its low computational burden and high accuracy. The spaceborne simulation data confirms its validity.]]></description>
<pubDate>2013/8/22 16:54:28</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Mingyu,YANG Taoli,LI Zhenfang and WU Shunjun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Mingyu,YANG Taoli,LI Zhenfang and WU Shunjun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304014]]></guid><cfi:id>240</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Predetermined target selection method for maritime formation
based on structure weighted]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Due to the restriction characteristics of maritime target movement and formation, point sets matching between the bound formation and the detected one by terminal guidance has become an effective approach in selecting the predetermined target.. But the jamming existing within formation can cause the formation structure to change partially, which results in deterioration of the target selection performance. Based on the target selection need for anti-ship missile, the factors causing the position point sets to be differently distorted are analyzed, which mainly contain the navigation and detection errors of sensor, the bound information error, the formation targets motion and the released jamming. Subsequently, through effectively using the uncontaminated structure information, a predetermined target selection method for maritime formation that integrates geometric hashing and structure weighted mean Hausdorff distance was presented. Theoretical analyses and experimental results show that the method is not affected by the sensor navigation error and formations unitary movement; moreover, this method can effectively improve the target selection capability when there exist dilute jammings.]]></description>
<pubDate>2013/8/22 16:54:28</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LUO Xiaobo<sup>1，2</sup>,SONG Zhiyong<sup>1</sup>,ZHAO Mingbo<sup>1</sup>,FAN Hongqi<sup>1</sup> and FU Qiang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LUO Xiaobo<sup>1，2</sup>,SONG Zhiyong<sup>1</sup>,ZHAO Mingbo<sup>1</sup>,FAN Hongqi<sup>1</sup> and FU Qiang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304015]]></guid><cfi:id>239</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Joint robust design for TDD MIMO amplify-and-forward 
relay downlink systems]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The problem of joint designing the base station (BS) precoder, the relay precoder and user equalizers for TDD MIMO amplifying-and-forwarding relay downlink systems is considered. In practical applications, the channel estimation error and the channel reciprocity delay can result in a serious performance loss of a joint designing based on ideal Channel State Information (CSI). Evolved from the distribution of estimation error and the temporal correlation of reciprocity delay, a joint “estimation error-reciprocity delay” channel model that takes both effects into account was established. Based on this model, a channel SVD-based precoding scheme at BS aiming at the first hop transmission was presented, which avoids the feedback overhead of the second hop CSI. Then a joint optimization problem of the relay precoder and user equalizers, which is based on minimizing the sum mean square error (SMSE) of all users with a constraint on the relay total transmit power, was set up. By using KKT (Karush-Kuhn-Tucker) conditions, a closed-form solution to this problem was achieved. Numerical results verify the robustness and effectiveness of the proposed scheme. ]]></description>
<pubDate>2013/8/22 16:54:28</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Haihong,WANG Xin and WEI Jibo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Haihong,WANG Xin and WEI Jibo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304016]]></guid><cfi:id>238</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research of re-radiating spoofing technique to GNSS timing receiver]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To supply accurate stand time signal, timing receivers were used to acquire high precision time by processing satellite navigation signals. A re-radiating spoofing technique was proposed, which dealt with the target receiver's timing uncertainty by controlling the signal delays and positioning antenna precisely. Once the timing receiver was controlled by the spoofing signals, the host system could be collapsed. Simulation results validate the effectiveness of the proposed spoofing technique.]]></description>
<pubDate>2013/8/22 16:54:28</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HUANG Long,GONG Hang,ZHU Xiangwei and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HUANG Long,GONG Hang,ZHU Xiangwei and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304017]]></guid><cfi:id>237</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Performance evaluation method based on average 
availability for inter-satellite links system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Independent and autonomous running of the entire GNSS system in navigation warfare is one of the most important aims of building inter- satellite links. However, it is inevitable that inter-satellite links will be faced with the threats from jams in navigation warfare, which may result in performance declining, or even breaking down. Therefore, exact evaluation of anti-jamming performance is very important. Ant- jamming performance evaluation of inter-satellite links system is much more difficult than other objects, as it is related to almost every aspect of the system, such as the design of signal system, network, linking strategy, equipment performance, and so on. In order to accurately evaluate the anti-interference performance of the entire inter-satellite links network under the conditions of navigation warfare, this study firstly analyzed a variety of factors which affect the anti-jamming performance of inter-satellite links. On this basis, test scenarios for anti-jamming performance evaluation was modeled and designed. And then an evaluation method for anti-jamming performance of inter-satellite links system based on average availability was proposed, and the index system for availability evaluation was defined, which made accurate and quantitative evaluation of anti-jamming performance of the entire inter-satellite links network possible.]]></description>
<pubDate>2013/8/22 16:54:28</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HAN Qiwei,NIE Junwei,LIU Wenxiang and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HAN Qiwei,NIE Junwei,LIU Wenxiang and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304018]]></guid><cfi:id>236</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A novel DDS-PLL hybrid structure for wideband signal generation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The signal generator with DDS-PLL Hybrid structure possesses the advantages of wide bandwidth and high frequency resolution. There are also some drawbacks, such as the serious spurious and harmonics, the increasing of difficulties in design and realization due to the zero phase error tracking of the linearity frequency modulation (LFM) signal, the long acquisition time, and the limitation to frequency modulation (FM) rate. A novel structure by adding sweeping voltage circuitry to the classical DDS-PLL hybrid in order to overcome the shortcomings is proposed. The predistortion was also involved in the study to compensate the static phase error which improves the pulse compression qualities. A test circuitry was designed. The measurements indicate that the acquisition time is reduced to 2.175μs and 1.032μs corresponding to loop bandwidths of 1MHz and 2MHz separately, the total phase error is depressed to be less than 4°,  and the pulse compression result is nearly ideal where the main lobe width remains as ideal, PLSR is better than-38dB, the ISLR is better than-9.5dB.]]></description>
<pubDate>2013/8/22 16:54:28</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHAO Zhiyong,CHANG Wenge and LI Xiangyang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAO Zhiyong,CHANG Wenge and LI Xiangyang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304019]]></guid><cfi:id>235</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Queue resource reallocation strategy for scale-free network]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In real communication systems, each node has a finite queue due to physical constraints. In this study, the influence of queue resource on data traffic dynamic in scale-free networks with finite queue resource was investigated. And a queue resource reallocation strategy was proposed. In this strategy, the allocation of queue length on node i is based on the betweenness centrality of node i. Simulations show that the capacity of the scale-free network can be improved by using the proposed strategy under the shortest path routing. With finite queue resource,  the network traffic capacity was also analyzed theoretically.]]></description>
<pubDate>2013/8/22 16:54:29</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Shuai and LIANG Mangui]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Shuai and LIANG Mangui</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304020]]></guid><cfi:id>234</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Determination for three kinds of critical size of single-electron 
transistor at room temperature]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To improve the capability of the single-electron transistor (SET) for the practical application, it is  inevitable to make the researches under the condition of room temperature. Initialized from the orthodox theory, this research calculated the critical size of coulomb island of SET which can work normally at room temperature: the memory device is 6.5nm, the logic device is 1.5nm; it also calculated the critical size of coulomb island of SET when the energy quantization effect at room temperature, 4.7nm, appeared. Furthermore, it verified and analyzed these two kinds of critical size. In addition, through a comparative analysis, it drew conclusion that all logical devices must consider the energy quantization effect and all memory devices should consider the energy quantization effect at room temperature. The analysis result shows that determination for critical size of coulomb island has important significance for the application of SET.]]></description>
<pubDate>2013/7/4 10:40:11</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Xiaobao,XING Zuocheng and SUI Bingcai]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Xiaobao,XING Zuocheng and SUI Bingcai</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303017]]></guid><cfi:id>233</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Synthetic evaluation for power quality based on improved 
combination weighting radar chart]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Improved combination weighting radar chart method is provided and applied in synthetic evaluation of power quality. The optimization model was established based on minimizing the deviation between the vectors of evaluation weights before and after the combination weighting. In the method, the sector area was ranked and the angle of the sector area was distributed by the weighting. Moreover, the diagonal of sector area was employed by using the radar chart as index axes. The unattached weighting of every index was not only reflected by the whole hog, but also the interactant was incarnated. Synthetic evaluation of power quality was completed by the area and girth of the radar chart. Verification results demonstrate the reliability and validity of the method.]]></description>
<pubDate>2013/7/4 10:40:11</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[OUYANG Hua,LI Hui,QIAO Pengcheng and WU Zhengguo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>OUYANG Hua,LI Hui,QIAO Pengcheng and WU Zhengguo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303018]]></guid><cfi:id>232</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A service model based on SWE for space-aeronautics cooperation earth observing operations]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The coordinated observation technique of air and space assets has been increasing in recent years and this trend of earth observation area is expected to continue in the future. A service model for space-aeronautics cooperation earth-observing operations is proposed after analyzing the SWE (Sensor Web Enablement) standard. In this model, in order to provide a common framework for air and space assets, the sensor model language of space-aeronautics observing resources was constructed. The primary focus of this language is to define processes and processing components associated with the measurement and post-measurement transformation of observations. Through introducing the inheritance mechanism, the proposed language can provide more robust definitions of platform, measurement, location, position, constraints and other characters. Besides, to shorten the data acquisition cycle, the standard interface of SWE was encapsulated, and a common end-user can request data directly without detailed knowledge of the platforms state and capabilities. To test the performance of proposed model, some experiments were designed and the simulations and analysis display the feasibility and the adaptability of the proposed model.]]></description>
<pubDate>2013/7/4 10:40:12</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Jun,LI Jun,ZHONG Zhinong,HU Weidong and CHEN Hao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Jun,LI Jun,ZHONG Zhinong,HU Weidong and CHEN Hao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303019]]></guid><cfi:id>231</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Precise velocity measurement and clutter suppression in random pulse 
repetition interval radar based on improved compressed sensing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Blind zones and ambiguities in range and velocity measurement are two important issues in the traditional pulse-Doppler radar. By generating random deviations with respect to a mean pulse repetition interval (PRI), which is converted to the restricted isometry property of the observing matrix, the proposed random PRI radar, based on the compressed sensing theory, provides a new way for moving target detection. In order to solve the problems of 'straddling loss' and clutter perturbation, a precise velocity measurement by local dictionary fractionization is proposed according to the iterative idea and the clutter is suppressed by modifying the optimization problem of CS. The simulation results demonstrate that this scheme has high performance of velocity measurement and clutter suppression.]]></description>
<pubDate>2013/7/4 10:40:12</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Zhen,WEI Xizhang,LI Xiang and LIAO Dongping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Zhen,WEI Xizhang,LI Xiang and LIAO Dongping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303020]]></guid><cfi:id>230</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Repeat jamming against LFM radars based on pulse separation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The time delay of output signal is sensitive to the frequency of input signal in LFM pulse compression radars. In light of this, a novel repeat jamming is presented based on pulse separation in which the separated pulses are retransmitted in a rearranged order. After the matched filtering, a set of false targets were induced. The jamming technique was explained in detail with group delay theory. Formulas of separation number on condition that false targets hold amplitude dominance and retransmitted order with the maximum number of false targets were presented. Finally, the theoretical analysis was verified by the simulation results.]]></description>
<pubDate>2013/7/4 10:40:12</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[PAN Xiaoyi,WANG Wei,FENG Dejun,FU Qixiang and WANG Guoyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PAN Xiaoyi,WANG Wei,FENG Dejun,FU Qixiang and WANG Guoyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303021]]></guid><cfi:id>229</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A coding and decoding algorithm for passive RFID tags featuring 
Variation-tolerance]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the independent national protocol (GJB 7377.1-2011), the current research proposes a coding and decoding algorithm for passive RFID tags, which features variation-tolerance of the clock frequency. This algorithm substantially considered the influence upon coding and decoding caused by clock frequency variation, counting error, dividing error, et al. Subsequently, the clock restriction that ensures correct coding and decoding was deduced. and a method to implement coding and decoding was found. As the simulation results show, the proposed algorithm has a low requirement for clock accuracy. It will meet the demand as long as the clock frequency is higher than 1.60 MHz. Furthermore, this algorithm dramatically reduces the difficulty and complexity of hardware implementation. Compared with that of previous works, the power consumption of this work decreases by nearly 50%.]]></description>
<pubDate>2013/7/4 10:40:12</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Cong,GU Xiaochen,LI Jiancheng and SHEN Xubang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Cong,GU Xiaochen,LI Jiancheng and SHEN Xubang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303022]]></guid><cfi:id>228</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Nonhomogeneous detector for STAP based on local 
template technique]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The key mechanism of strong target influence over the STAP nonhomogeneous detector was analyzed. Then, considering the declining performance of nonhomogeneous detector with strong interference targets, and the high computational complexity of traditional APR method, a new nonhomogeneous detector based on local template was presented. Compared with the traditional methods, the method proposed can obtain high computational efficiency and more robust detection performance. Finally, experiments with the actual data proved the effectiveness of the proposed model.]]></description>
<pubDate>2013/7/4 10:40:12</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Yuxiang and GAO Lining]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Yuxiang and GAO Lining</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303023]]></guid><cfi:id>227</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The spatiotemporal model and driving pattern
in military mission rehearsals]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the rehearsal demand in military information system, an efficient and integrated mission rehearsal method based on Spatiotemporal Event Series (SES) is proposed. First the mission expression based on hiberarchy decompounding and materialization strategy by capability was put forward, and then a mission-oriented data application model was advanced for data customization, which minimized the integrative spatiotemporal dataset according to the least demand of battle mission. After that, the event definition model of SES and its data driving pattern were illustrated. Finally the application method was discussed with specific emulation example. The experimental prototype system proved their validity and feasibility. ]]></description>
<pubDate>2013/7/4 10:40:12</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Huan,MA Boning and KONG Longxing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Huan,MA Boning and KONG Longxing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303024]]></guid><cfi:id>226</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Improve the radiation efficiency of bow-tie antenna by 
exploiting the energy in end reflections]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The bow-tie antenna, which is widely used in impulse ground penetrating radar (GPR), has very low radiating efficiency. It is because that nearly 70% of the radiated energy exists as the form of end reflection, which is obstructive to probing objects. In order to keep the probing ability, the remarkable energy in end reflections is usually dissipated by resistive loading. Through the current research, it was found that, if the exciting pulse is bipolar and monocycle, the radiation efficiency can be significantly improved by utilizing the energy in end reflection, and the improvement can be implemented by optimizing the antenna length. The simulated results show that the radiation efficiency can be increased by nearly 100%. The measured results validate the proposed method again. Additionally, the proposed method is easy to be carried out in applications and of great use.]]></description>
<pubDate>2013/7/4 10:40:12</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Jian,HUANG Chunlin,LU Min,LI Yu and SU Yi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Jian,HUANG Chunlin,LU Min,LI Yu and SU Yi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303025]]></guid><cfi:id>225</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Power amplifier behavioral modeling using memory rational function]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the nonlinear characteristics and memory effects of power amplifier, a memory rational function behavioral model, which is based on the memory polynomial model and memoryless rational function model, is proposed. The model coefficients were identified by conjugate gradient method. The estimation of the best model nonlinearity order and the best memory depth was carried out with the minimized the normalized mean squared error (MNSE). The model was validated using multi-carrier WCDMA signal and a MRF6S21140H power amplifier by measurement. The result indicates that the proposed model can achieve better model performance with less number of coefficients, compared with the memory polynomial model and memoryless rational function model.]]></description>
<pubDate>2013/7/4 10:40:12</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Hui,JIAN Chunxiao,LI Gaosheng and LIU Peiguo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Hui,JIAN Chunxiao,LI Gaosheng and LIU Peiguo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303026]]></guid><cfi:id>224</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A fitting method for satellite orbit in GNSS based on powell 
optimization theory]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the high precise and real-time computation of the satellite orbit in GNSS (Global Navigation Satellite System) simulator with satellite orbit, a fitting method based on Powell optimization theory is proposed. The method converts the fitting method for satellite position to the non-restraint least method, and the parameters of the satellite orbit model were obtained by the optimization theory, with which it is easy to compute the velocity, acceleration and so on. The computation examples show that, in the case of fitting the satellite ephemeris, the new method speeds up the computation three times faster than the direct ephemeris calculation, and the position error is less than 1×10<sup>-4</sup>m and the velocity error 1×10<sup>-6</sup>m/s. In the case of fitting the GPS precise ephemeris, the new method increases precisely two times efficiency than that of the ephemeris Lagrange interpolation.]]></description>
<pubDate>2013/7/4 10:40:12</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SHA Hai,TONG Haibo,ZHANG Guozhu and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHA Hai,TONG Haibo,ZHANG Guozhu and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303027]]></guid><cfi:id>223</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Estimation method of BDS on-board clock short-term stability 
combining satellite two-way with one-way 
carrier ranging]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303028]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Usual estimation method of satellite on-board clock short-term stability demands continuous observation of large ground monitoring network and complex algorithm, which is not suitable for single station observation.  Based on an analysis of the short-term frequency stability estimation method of satellite on-board clock using observation from one single station, a simpler method combining satellite two-way carrier ranging with GNSS one-way carrier phase observation is proposed. This method is based on GNSS carrier phase observation eliminating geometric distance between satellite and receiver, which is determined by satellite two-way carrier ranging. Performance of this method is evaluated by using BDS data. The estimation result  agrees well with result of complex algorithm, and is very close to the smoothed broadcast ephemeris method (SBE method) for average time of 1~1000 seconds with relative error less than 10%, but better than SBE method for average time above 1000 seconds.]]></description>
<pubDate>2013/7/4 10:40:13</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GONG Hang<sup>1</sup>,YANG Wenke<sup>1</sup>,LIU Zengjun<sup>1</sup>,LIU Hu<sup>2</sup> and WANG Feixue<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GONG Hang<sup>1</sup>,YANG Wenke<sup>1</sup>,LIU Zengjun<sup>1</sup>,LIU Hu<sup>2</sup> and WANG Feixue<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303028]]></guid><cfi:id>222</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A new design of dynamic channelized receiver]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303029]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Considering that there exist many signals with nonuniform distributions and different bandwidths in the complicated electromagnetic environment, a new method is proposed for designing a dynamic channelized receiver. Firstly, a halfband filter was designed and its frequency response was compressed by zero-value interpolation to form periodic spectra. Secondly, the input signal was filtered with the interpolated halfband filter, and then the output of the interpolated halfband filter was subtracted from a suitably delayed version of the input signal. In this way, two channel signals whose spectra are complementary were obtained. Thirdly, the two channel signals were filtered respectively with the analysis filter bank to realize the uniform channelization. Finally, according to the energy detection of sub-channels, the outputs from adjacent sub-channels, which belong to the same signal, were treated as the input of the synthesis section, and the corresponding synthesis filter bank was designed to extract the desired signal. Theory analysis and simulation results verify the validity of the new method.]]></description>
<pubDate>2013/7/4 10:40:13</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[TANG Pengfei,LIN Qianqiang,YUAN Bin and CHEN Zengping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TANG Pengfei,LIN Qianqiang,YUAN Bin and CHEN Zengping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303029]]></guid><cfi:id>221</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Multifractal cross-correlation analysis of sea clutter and 
target detection based on Q-MMSPF]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303030]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A novel method, the Qth order Mixed Moment Structure Partition Function (Q-MMSPF) method, is proposed for the detection of long range cross- correlations and multifractality. With this method, the multifractal cross-correlation characteristic of sea clutters was investigated. The analysis, based on the real sea clutter data, shows that the cross-correlation multifractality is quite weaker between the two sea clutter series, and the multifractality is significant between two time series of target plus sea clutter, whereas the multifractality is in the middle for the case, which is between target time series and sea clutter time ones. Consequently, an approach was suggested to detect the targets in sea clutter. The test results show that the target can be clearly distinguished from the sea clutter background with the proposed feature-based method. ]]></description>
<pubDate>2013/7/4 10:40:13</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SUN Kang<sup>1</sup>,JIN Gang<sup>2,3</sup>,ZHU Xiaohua<sup>1</sup> and SUN Li<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SUN Kang<sup>1</sup>,JIN Gang<sup>2,3</sup>,ZHU Xiaohua<sup>1</sup> and SUN Li<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303030]]></guid><cfi:id>220</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A novel high-precision, low-power time-keeping chip]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303031]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In a positioning system based on calculating the distance by measuring the time delay, increasing the accuracy of the estimation of time delay is a key factor to improve the performance of navigation receivers. Generally, the off-the-shelf timekeeping chip cannot achieve the performance of high accuracy and low power consumption at the same time, which is especially required in portable and hand-held navigation receivers. A novel architecture of the timekeeping chip was presented to solve that contradiction. In this architecture, the time is compensated directly according to the temperature. And two circuit operation states, the low-power operation and the high-power bursty process, work alternately in turn. The chip can achieve the time accuracy of 0.5ppm and the stand by power consumption of 173μW, which can replace state-of-art commercial RTCs to improve the performance of portable and hand-held navigation receivers.]]></description>
<pubDate>2013/7/4 10:40:13</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Liang<sup>1</sup>,XIAN Deyong<sup>2</sup>,LIU Sihui<sup>1，3</sup>,TIAN Feng<sup>1</sup> and OU Gang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Liang<sup>1</sup>,XIAN Deyong<sup>2</sup>,LIU Sihui<sup>1，3</sup>,TIAN Feng<sup>1</sup> and OU Gang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303031]]></guid><cfi:id>219</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The influence of phase noise to signal analysis based on 
transmitter and receiver homologous equipment]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303032]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Signals through transmitting and receiving homologous equipment contain analog down conversion, A/D sampling, digital signal transfer and management, D/A recovering and analog up conversion. A signal transmission model of transmitter and receiver homologous equipment is presented, and an analysis of the influence of phase noise on the signal is made. Through an analysis of the frequency standard phase noise changes at down-convert moment and the up-convert moments, an expression for the influence of frequency standard phase noise upon the signals through transmitting and receiving homologous equipment was derived, and a conclusion was drawn that: because of frequency standard phase noise, signals through transmitting and receiving homologous equipment, RF carrier frequency and code rate were multiplied as a constant factor. It could be viewed as the equivalent to a Doppler offset shift, and its trend keeps consistent with frequency standard drift trend. The result is fundamentally different from the general conclusion. It considers that the transmitter and receiver derived by the same frequency standard can fully offset the impact. Finally, by designing the special experimental program, efforts were made to verify the derivation of Doppler drift factor expression. Experimental test results show that the Doppler shift test results are consistent with the formula derived result, and the frequency drift trend is in line with expectations. Therefore, the experimental test results met well with the deduced conclusion from the theoretical analysis.]]></description>
<pubDate>2013/7/4 10:40:13</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Pengpeng,GE Rui,HAN Qiwei and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Pengpeng,GE Rui,HAN Qiwei and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303032]]></guid><cfi:id>218</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Robust beamforming for distributed amplify-and-forward relay 
aided multiuser peer-to-peer communication]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This study addresses the robust distributed relay network (DRN) beamforming design problems for a distributed Amplify-and-Forward (AF) relay aided multiuser peer-to-peer communication system in the presence of imperfect channel state information (CSI). By adopting a stochastic CSI error model, two robust optimal design problems are considered. One is aimed at balancing the signal-to-interference plus noise ratio (SINR) at destinations under the DRN total transmit power constraint concerning the fairness, the other is to minimize the DRN total transmit power with the guarantee of QoS requirements (SINRs exceed preassign thresholds) at destinations concerning the efficiency. The analysis and modeling indicates that the problems above are the intractable problems. By introducing the semidefinite relaxation (SDR) technique, the intractable problems hereinbefore can be converted into the semidefinite program (SDP) problems which can be solved efficiently through the interior-point method. The robust performance of the proposed designs is demonstrated through simulations. ]]></description>
<pubDate>2013/5/21 9:27:54</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Haihong,WANG Xin and WEI Jibo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Haihong,WANG Xin and WEI Jibo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302011]]></guid><cfi:id>217</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Focusing of airborne UWB SAR data under the condition of platform maneuvers by using SIFFBP algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Under the condition of platform maneuvers, the accuracy of the motion compensation in frequency-domain cannot meet the focusing need of airborne Ultra-wideband Synthetic Aperture Radar (UWB SAR) because of strong motion errors. The time-domain Back Projection (BP) algorithm can be used in this instance, whereas the large amount of computation limits its application. In light of this, a strategy of processing the airborne UWB SAR data with platform maneuvers is proposed by using the Sub-image Fast Factorized Back Projection (SIFFBP) algorithm. The constrain relationship between the sub-aperture and sub-image factorization was derived, and then the implementation approach was listed with the computation volume being analyzed. The processing results of the simulated and real data show that SIFFBP algorithm is applicable 
for the focusing of airborne UWB SAR under the condition of platform maneuvers with high precision and efficiency. ]]></description>
<pubDate>2013/5/21 9:27:54</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YAN Shaoshi,LI Yueli,LIN Shibin,ZHOU Zhimin and AN Daoxiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YAN Shaoshi,LI Yueli,LIN Shibin,ZHOU Zhimin and AN Daoxiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302012]]></guid><cfi:id>216</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Blind identification of underdetermined mixtures based on detection of time 
frequency single source point and cluster validation technique]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the problem of blind identification of underdetermined mixtures,  an underdetermined blind identification algorithm is proposed, based on the detection of time-frequency single source point and cluster validation technique. Firstly, single source point of each source signal was detected. Then the mixing vector in the corresponding single source point set was estimated by Singular Value Decomposition (SVD). Finally the number of the source signals and the mixing matrix simultaneously were estimated by the cluster validation technique based on k-means clustering algorithm. Compared with the conventional algorithms with single source hypothesis, the proposed algorithm relaxes the sparsity requirement of the source signals and can estimate the mixing matrix under the assumption that there exist disjointed single source points for each source signal. Meanwhile, the proposed algorithm can estimate the number of the source signals while the conventional algorithms require it to be known as a priori. Simulation results display the efficiency of the proposed algorithm. ]]></description>
<pubDate>2013/5/21 9:27:54</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Xiang,HUANG Zhitao,REN Xiaotian and ZHOU Yiyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Xiang,HUANG Zhitao,REN Xiaotian and ZHOU Yiyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302013]]></guid><cfi:id>215</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Reserch of the doppler positioning timing method based on IGSO satellite]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the condition of navigation war, civil or indoor environment, when the visible satellite number is less than 3 and users’ position is unknown, one-way timing solution is no longer unavailable. Based on the characteristics of Chinese navigation satellite system such as COMPASS and CAPS, a doppler positioning timing method based on IGSO satellite is proposed. By measuring the doppler frequency shift and counting the integral Doppler, the user position and time are computed. Analysis result shows that the positing and timing usability can reach nearly 100% in Chinese domain when using 3 IGSO satellites with transponders. The position precision can achieve 3m and the timing error is less than 100ns for static users with long time measurement. Because only one IGSO satellite is needed and there is no requirement for demodulating navigation message, this method provides a novel timing method for the navigation war background and weak signal environment. ]]></description>
<pubDate>2013/5/21 9:27:54</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SHA Hai,GONG Hang,ZHAN Jianwei,ZHANG Guozhu and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHA Hai,GONG Hang,ZHAN Jianwei,ZHANG Guozhu and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302014]]></guid><cfi:id>214</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of the impact of satellite’s high power amplifier on 
the performance of navigation signals carrier tracking]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Because of the limited bandwidth of filter and the high-power amplifier nonlinear 
effect, there will be phase noise for the constant envelope signals, which will affect navigation signals in 
the PLL tracking error of carrier tracking. To address this issue, the generic model for analyzing navigation 
signals non-linear distortion was established, and the relation between high-power amplifier nonlinear 
effect and performance of PLL tracking error were simulated and analyzed.]]></description>
<pubDate>2013/5/21 9:27:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Caihua,LIU Yingxiang,MO Weihua and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Caihua,LIU Yingxiang,MO Weihua and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302015]]></guid><cfi:id>213</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Performance analysis of finite word-length effect on phase discriminator in satellite navigation receiver]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The ability of navigation receiver to track signals is affected by phase locked 
loop tracking accuracy. Phase discriminator plays an important role in the design of phase locked loop. Base 
on the influence on the finite word length effect to the dot product and the arctangent discriminator’s 
performance, a word length error model was proposed. The theoretical analysis of the finite word-length 
affected to the discriminator’s converge range and gain was presented by deducing the input signal’s 
statistical characteristic. Analysis and simulation show that the deviation of input signals of the phase 
discriminator with up to 3 bits has no influence on the carrier tracking accuracy.]]></description>
<pubDate>2013/5/21 9:27:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Xiaohui and HUANG Long]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Xiaohui and HUANG Long</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302016]]></guid><cfi:id>212</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An improved CIR for long baseline]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[At long baseline, for multipath and ionospheric residual bias, classical CIR can 
get wrong ambiguity resolution at some epoch, and requires a large search area on basic carrier. In this 
research, ambiguity errors of CIR were analyzed, and an approach to improved CIR based on carrier phase 
smoothing pseudorange and eliminating ionosphere delay is presented and errors variance was analyzed. Finally, 
CIR and improved CIR were compared at both short and long baseline by compass measured datum. The result shows 
that improved CIR can obtain correct double difference extra wide lane ambiguity and wide lane ambiguity on 
one epoch, and reduce the search area on basic carrier ambiguity. ]]></description>
<pubDate>2013/5/21 9:27:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Zengjun,PENG Jing,LV Zhicheng and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Zengjun,PENG Jing,LV Zhicheng and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302017]]></guid><cfi:id>211</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[High accuracy iterative frequency estimating algorithm based on the extremum of the DFT coefficients]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[At present, frequency estimation algorithm based on DFT interpolation is widely 
used because of it’s high operation efficiency, but the estimating accuracy is dependent on the signal 
frequency, and for specific frequency, the estimation performance is bad. To solve this problem, a high 
accuracy frequency estimation algorithm with lower calculating complexity is proposed. In this algorithm, the 
signal frequency was estimated by Secant Method based on the DFT samples, and decimal fraction frequency of 
peak magnitude DFT sample was estimated to generate new DFT samples, thus reducing the DFT sample interval 
with little calculating burden, then improving the estimating accuracy. In addition, through removing the 
frequency reliant characteristics of estimation which exist in traditional frequency estimator based on the 
DFT interpolation, this algorithm increased the iterative estimation. To analyze the performance of the 
algorithm, a simulation was fulfilled. The simulation results show that the single frequency estimator without 
iterative estimation has asymptotic estimating variance less than 1.2 times the CRLB, which is better than the 
traditional frequency estimator based on the DFT interpolation, with calculation labor of N log<sub>2</sub>N+2N complex 
multiplications, and the iterative frequency estimator has estimating variance about CRLB for all signal 
frequency calculation labor of N log<sub>2</sub>N+2N complex multiplications, and N is the number of the DFT samples. ]]></description>
<pubDate>2013/5/21 9:27:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XIAO ZhiBin,TANG XiaoMei and WANG FeiXue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIAO ZhiBin,TANG XiaoMei and WANG FeiXue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302018]]></guid><cfi:id>210</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Performance of integrate and dump filters in GNSS receivers]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In global navigation satellite system (GNSS) receivers, matched filters should be 
applied in time delay estimation to maximize signal-to-noise ratio of tracking loops. Integrate and dump 
filters are often used as a simplification to reduce hardware cost; however, there is no quantitative 
conclusion about its performance degradation yet. To deal with this issue, analytical expression of 
performance degradation is derived, and Monte Carlo simulations are given to support the analysis. Theoretical 
and simulated results show that the performance degradation is about 0.44dB if sampling frequency is twice of 
signal bandwidth, and it can be neglected if sampling frequency is increased to four times of signal bandwidth.]]></description>
<pubDate>2013/5/21 9:27:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU YingXiang,TANG XiaoMei and WANG FeiXue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU YingXiang,TANG XiaoMei and WANG FeiXue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302019]]></guid><cfi:id>209</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[CRLB analysis of FDOA estimation accuracy based on 
pulse trains in passive location system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The frequency difference of arrival (FDOA) estimation is the key point in a passive 
location system, and the estimation accuracy of FDOA determines the location performance. The FDOA estimation 
methods have been widely studied, but theoretical maximal accuracy of FDOA estimation is barely referred. To 
explore the ultimate performance of the FDOA estimation, the CRLB of frequency FDOA estimation accuracy was 
studied. On the basis of building a mathematical model, the quantitative relationship between the FDOA 
estimation accuracy and the parameters of received signal was investigated. By the means of mathematical 
deduction and numerical simulation, the algebraic expression of the CRLB was conducted in different 
application modes. Finally the characteristic of the CRLB was evaluated, and the conclusion can be used to 
direct the design of passive location system based on FDOA.]]></description>
<pubDate>2013/5/21 9:27:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[Huang Long<sup>1</sup>,Guo Shuren<sup>2</sup>,Xu ang<sup>2</sup> and Wang Feixue<sup></sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Huang Long<sup>1</sup>,Guo Shuren<sup>2</sup>,Xu ang<sup>2</sup> and Wang Feixue<sup></sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302020]]></guid><cfi:id>208</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A clock error calibration algorithm based on phase lock loop in GNSS time synchronization receiver]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[GNSS receiver synchronizes local clock by calibrating clock error obtained from 
GNSS satellite signal. A novel local clock error calibration algorithm is developed. The time synchronization 
procedure was considered as a PLL model. In this model, phase detector was achieved by PVT solution, VCO was 
achieved by local clock adjusting interface, and the PLL lock the phase of local clock and GNSS clock. The 
total PLL time synchronization loop errors were analyzed, the relationship of each error item and parameters 
of PLL was analyzed, and the best PLL design criteria were developed. Finally, the time synchronization 
algorithm was tested on a COMPASS navigation receiver.]]></description>
<pubDate>2013/5/21 9:27:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XIANG Wei,XU Bo,MOU Weihua and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIANG Wei,XU Bo,MOU Weihua and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201302021]]></guid><cfi:id>207</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[LDPC decoder for GPS L1C signal]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201301013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In GPS modernization, LDPC code is used in L1C signal to enhance the receivers’ performance in weak signal environments. The LDPC codes used in L1C signal do not have cyclic or quasi-cyclic structure, which increases the complexity of decoder. To reduce the implementation complexity of decoder, the structure of parity check matrix of the LDPC code used in GPS L1C signal was analyzed. Based on the analysis, a complexity- reduced decoder was presented. The presented decoder divides the check nodes into two groups and changes the variable nodes updating way, which can reduce the storage and simplify the control logic of the decoder. The decoding results of the presented decoder are validated by simulation.]]></description>
<pubDate>2013/3/13 9:54:33</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Jianhui,LI Jingyuan,NI Shaojie and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Jianhui,LI Jingyuan,NI Shaojie and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201301013]]></guid><cfi:id>206</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[LFM interference mitigation in GPS received signal]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201301014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Linear Frequency Modulation (LFM) interference mitigation in received GPS signal by antenna array was studied. The pivotal problem of LFM interference suppression is the instantaneous frequency estimation, With this conception, the cross-term in the time-frequency distribution must be suppressed. Thus the received signal vector was whitened and the Spatial-Time-Frequency Distribution (STFD) matrix was formed by utilizing the whitened signal vector. A decision variable which is different from traditional one was deduced. By using the decision variable, the auto-term in the time-frequency distribution of the LFM signal can be selected clearly. Based on the time-frequency distribution of the auto-terms, the parameters and the instantaneous frequency of the LFM signals can be estimated. According to the instantaneous frequency, corresponding notch filters can be formed, which can mitigate the interferences. Through simulation, it can be viewed that the time-frequency distribution of the received signal which is interfered seriously by the cross-term can be mapped into a clear time-frequency distribution of auto-terms of the signal. Under the condition that the number of snap is enough, the LFM interferences can be suppressed clearly.]]></description>
<pubDate>2013/3/13 9:54:33</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHOU Zhu<sup>1</sup>,LU Shujun<sup>1</sup>,ZHANG Eryang<sup>1</sup> and LI Yaoming<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Zhu<sup>1</sup>,LU Shujun<sup>1</sup>,ZHANG Eryang<sup>1</sup> and LI Yaoming<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201301014]]></guid><cfi:id>205</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of time and frequency synchronization error for the passive 
SAR system with spaceborne illuminators]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201301015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The problem of time and frequency synchronization is a bottleneck technology for the passive SAR system with spaceborne illuminators. In order to analyze the impact of time and frequency synchronization error to passive SAR imaging, the mechanism of time and frequency synchronization error was studied based on the particular operation mode of passive SAR. Then the error model of time and frequency synchronization was established, and the integrated error transfer model from synchronization error to passive SAR imaging was established. In the end, the correctness of the theoretical analysis was validated by simulation experiment. The theoretical analysis and the simulation result show the accuracy requirement of time and frequency synchronization for such a system. The conclusion can be used as principal guidance for passive SAR system design and synchronization method research.]]></description>
<pubDate>2013/3/13 9:54:34</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Qilei,CHANG Wenge and LI Xiangyang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Qilei,CHANG Wenge and LI Xiangyang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201301015]]></guid><cfi:id>204</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Multisensor joint target detection and tracking algorithm 
based on random finite sets]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201301017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A joint detection and tracking algorithm based on Random Finite Sets (RFS) theory was proposed for target detection and tracking in presence of clutters using multiple sensors. First, target states and measurements were described as RFS variables, RFS models of target motion including target birth, target survival and target death, and the multisensor measurements including miss detection and false alarm were constructed. The joint target detection and tracking problem was then modeled as a Bayesian optimal estimation to the target state RFS and the theoretically rigorous recursive formulas for the estimation were derived by using RFS theory. Finally, Sequential Monte Carlo (SMC) implementation was presented to the filter recursion. Simulation results demonstrate the effectiveness of the proposed algorithm and its significant improvement in performance over traditional association-based ones.]]></description>
<pubDate>2013/3/13 9:54:34</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Yang<sup>1,2</sup>,XU Hui<sup>2</sup>,LUO Shaohua<sup>2</sup> and AN Wei<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Yang<sup>1,2</sup>,XU Hui<sup>2</sup>,LUO Shaohua<sup>2</sup> and AN Wei<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201301017]]></guid><cfi:id>203</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An algorithm improving objects detection for low-quality 
video using stochastic resonance]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201301019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Video object extraction is a key technology in intelligence surveillance. An object detection algorithm for low-quality video based on Gaussian Mix Model and stochastic resonance was proposed. Firstly, the algorithm generated the object probability gray image from the current frame with the Gaussian Mix Model by the mapping function defined. Then, stochastic resonance was applied to the object probability gray image by adding noise until the defined evaluation function achieved the minimum value. After stochastic resonance, an effectively enhanced object probability gray image could be obtained. Hence the binary image including the interested objects is retrieved by segmentation of the enhanced object probability gray image. The experimental results show that the proposed algorithm combining the Gaussian Mix Model and the stochastic resonance achieved satisfactory subjective and objective performance under the worse environment with dark, foggy and infrared imaging while the classic background subtraction method almost could not detect the interested objects.]]></description>
<pubDate>2013/3/13 9:54:34</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Mingsheng<sup>1,2</sup>,QIN Mingxin<sup>2</sup>,SUN Jixiang<sup>1</sup>,YIN Zhongqiu<sup>3</sup> and NING Xu<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Mingsheng<sup>1,2</sup>,QIN Mingxin<sup>2</sup>,SUN Jixiang<sup>1</sup>,YIN Zhongqiu<sup>3</sup> and NING Xu<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201301019]]></guid><cfi:id>202</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An efficient attribute reduction algorithm in inconsistent decision tables]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201301020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Existing algorithms of distribution reduct, maximum distribution reduct and assignment reduct for inconsistent decision tables are inefficient, which are not suitable for large data sets. A measurement of attribute importance based on the relative discernibility degree was presented firstly, which overcomes the shortcoming of positive domain in measuring the importance of attributes. Then, in order to simplify the decision table, some kinds of simplified consistent decision tables were defined. In the end, an efficient attribute reduction algorithm was designed based on the relative discernibility degree. Theoretical analysis and experimental results show the effectiveness and practicalbility of this algorithm on the large inconsistent data sets.]]></description>
<pubDate>2013/3/13 9:54:34</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Cailian<sup>1</sup>,TENG Shuhua<sup>1</sup>,SUN Jixiang<sup>1</sup> and KANG Yaohong<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Cailian<sup>1</sup>,TENG Shuhua<sup>1</sup>,SUN Jixiang<sup>1</sup> and KANG Yaohong<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201301020]]></guid><cfi:id>201</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The SAR micro motion target imaging via the sparse Bayesian method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201406023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The micro motion target image of SAR can be used in radar target recognition since it can reflect the attribute of target information. Based on the fact that the SAR echo of the micro motion target is sparse, the sparse signal representation was established under an over-complete dictionary. A new sparse Bayesian learning named expansion-compression variance-component based method was employed, which only assigns the distinct variance components to the significant signal elements.  In addition, the expansion-compression variance-component based method has much less parameters. The imaging results of SAR micro motion target can estimate the micro motion parameter better, and achieve the fine SAR micro motion image under the low signal to noise ratio.]]></description>
<pubDate>2015/1/22 16:38:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SU Wuge<sup>1</sup>,WANG Hongqiang<sup>1</sup>,Deng Bin<sup>1</sup>,QIN Yuliang<sup>1</sup> and LING Yongshun<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SU Wuge<sup>1</sup>,WANG Hongqiang<sup>1</sup>,Deng Bin<sup>1</sup>,QIN Yuliang<sup>1</sup> and LING Yongshun<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201406023]]></guid><cfi:id>200</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Forward-looking three dimensional imaging technique for 
InSAR mounted on ground vehicles]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201406024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[It is a difficult task for an unmanned ground vehicle (UGV) to sense obstacles in out fields or unstructured environments. Because the height information is a vital feature to boost the performance of obstacle discrimination, the three-dimensional imaging technique for sensing obstacles ahead UGV of interferometric synthetic aperture radar (InSAR) was presented. The basic signal process flow of InSAR was reviewed. Special factors of the UGV platform that impact the digital elevation model (DEM) measurement precision were analyzed, such as the baseline length, platform motion errors. The DEM of a partial sight-blocked obstacle scene was obtained by processing the three-dimensional InSAR image, which proved the feasibility of applying InSAR to obstacle sensing of UGV.]]></description>
<pubDate>2015/1/22 16:38:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Jian,LI Yanghuan,ZHANG Hanhua,LU Biying,SONG Qian and ZHOU Zhimin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Jian,LI Yanghuan,ZHANG Hanhua,LU Biying,SONG Qian and ZHOU Zhimin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201406024]]></guid><cfi:id>199</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Overview of quantum radar and target detection performance]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201406025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Quantum technology have been exploited to increase the performance of classical devices in science and engineering fields, such as electronic information and computer technology. Radar, as a typical electronic information system, suffers more and more challenge in target detection, for the widespread applications of stealth and electronic countermeasure technology. The system models of target detection, and the related research advance of the combination of quantum technology and radar technique were overviewed. The basic concept, classification and typical instances of quantum radar system were introduced. The significant research progress of how quantum phenomena enhance the radar target detection performance was analyzed. Directions of future work including key technologies and main problems in the realization of quantum radar were presented.]]></description>
<pubDate>2015/1/22 16:38:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XIAO Huaitie,LIU Kang and FAN Hongqi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIAO Huaitie,LIU Kang and FAN Hongqi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201406025]]></guid><cfi:id>198</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An orbit-determination method with particle swarm optimization using
space-based optical short-arc observation in admissible region]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201406026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to determinate the orbit of space objects, an orbit-determination method with particle swarm optimization (PSO) using space-based optical short-arc observation in admissible region was proposed. The concepts of the attributes, the admissible region and the construction of optimization-function were introduced. A method with PSO for searching best key to optimization-function was proposed to avoid the problem of various keys, local optimizations and mass calculations. An orbit-determination course was simulated with 3rd part software to validate the correctness of the proposed orbit-determination method. Simulation results indicate the proposed method with PSO reaches more precise orbit without various keys and mass calculations, the performance of proposed method is close to Crame-rao low bound.]]></description>
<pubDate>2015/1/22 16:38:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Xueying,AN Wei and LI Jun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Xueying,AN Wei and LI Jun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201406026]]></guid><cfi:id>197</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Extended latent Dirichlet allocation for image annotation of nonnegative tensor representation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201406027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Automatic image annotation is a challenge task due to the well-known semantic gap. Considering the difference between low-level visual features and high-level semantic concepts, the framework of automatic image annotation from the two aspects, image representation and semantic modeling, was constructed. For image representation, a new method of regularized nonnegative tensor representation (RNTP) was presented to abstract the detailed high-order tensor structures according to human’s intuitive recognition. A three-level hierarchical Bayesian model, extended latent Dirichlet allocation (ELDA), was developed for semantic modeling. In ELDA, each item of multiple image factors was modeled as a finite mixture over latent variables. Meanwhile, an efficient expectation-maximization algorithm based on variational inference was proposed for parameter estimation. Extensive experimental results are reported on the NUS-WIDE dataset to validate the effectiveness of our proposed solution to the automatic image annotation problem by comparing with other state-of-the-art methods.]]></description>
<pubDate>2015/1/22 16:38:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[QIAN Zhiming,ZHONG Ping and WANG Runsheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>QIAN Zhiming,ZHONG Ping and WANG Runsheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201406027]]></guid><cfi:id>196</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The application of randomness theory in intelligence, 
surveillance and reconnaissance modeling]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201406028]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The modeling and simulation of intelligence，surveillance，reconnaissance(ISR) is difficult and important for joint campaign-level simulation. In the simulation, ISR model is required that it not only can accurately reflect the perception interaction between battle space entities, but also has a high running speed. To solve this problem, the modeling method of joint campaign-level ISR based on randomness theory was proposed. It took the modeling procedure of regional reconnaissance of aircraft image intelligence for example and described the main links of the modeling method. The modeling method was verified by the simulation experiment, and it showed the validity and applicability of the modeling method. Compared with traditional certain ISR modeling methods, it improves the efficiency of simulation on the condition of insuring simulation precision，and it also provides a reference method of C<sup>4</sup>ISR modeling and simulation in joint campaign-level warfare simulation.]]></description>
<pubDate>2015/1/22 16:38:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Yuanfeng<sup>1</sup>,SHI Chengying<sup>1</sup> and PENG Haoran<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Yuanfeng<sup>1</sup>,SHI Chengying<sup>1</sup> and PENG Haoran<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201406028]]></guid><cfi:id>195</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A segmentation algorithm for optical microscopic mycobacterium 
tuberculosis images based on region segmentation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To improve the segmentation accuracy of mycobacterium tuberculosis (MTB) objects, a segmentation algorithm for optical microscopic MTB images in region level was proposed. Top-bottom hat transform was used to enhance the contrast of the color images, and the image gradients were computed by comprising local features and global information of the images. Watershed algorithm was employed to implement the initial segmentation. Segmented regions were then merged by using the maximum similarity criterion in adjacent regions in order to obtain integrated object regions. The method of multi-threshold segmentation in terms of the color characteristics of MTB object regions was adopted to filter the impurities and to realize the segmentation of MTB objects. Experimental results indicate that the proposed algorithm can segment MTB objects which have low contrast and saturation and can obtain well-segmented results for images in different dyeing backgrounds.]]></description>
<pubDate>2014/11/25 10:16:02</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Chao<sup>1</sup>,ZHOU Dongxiang<sup>1</sup>,LIU Yunhui<sup>2</sup> and FAN Weihong<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Chao<sup>1</sup>,ZHOU Dongxiang<sup>1</sup>,LIU Yunhui<sup>2</sup> and FAN Weihong<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405014]]></guid><cfi:id>194</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Compressive signal reconstruction using a hierarchical 
wavelet connected tree]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The model-based compressive sensing (CS) dictated that robust signal reconstruction was possible to obtain from fewer measurements, but the computational complexity of this approach was large while using the optimal tree approximation with wavelets. Based on the testified result that the wavelet hierarchical tree was still connected, the model-based wavelet hierarchical connected tree CS algorithm， was proposed. The proposed algorithm which has the equivalent measurements with that of model-based CS can enhance the signal-reconstruction efficiency and guarantee the signal-reconstruction accuracy. Numerical simulations demonstrate the validity of the new algorithm. Furthermore, the proposed algorithm has a distinct advantage when dealing with the mass of data.]]></description>
<pubDate>2014/11/25 10:16:02</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Qian,GUO Jinku,YU Zhiyong and LIU Guangbin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Qian,GUO Jinku,YU Zhiyong and LIU Guangbin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405015]]></guid><cfi:id>193</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Simulation of bi-dimensional correlated G<sup>0</sup> distributed radar clutter]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The G<sup>0</sup> distribution is capable of fitting radar clutter with different degrees of heterogeneity, so the accurate simulation of bi-dimensional correlated G<sup>0</sup> distributed radar clutter is a vital step in the radar system design and evaluation. In the base of the nonlinear transformation which was expressed approximately by the method of  piecewise polynomial fitting, the simulation method of bi-dimensional correlated G<sup>0</sup> distributed radar clutter based on memoryless nonlinear transformation was proposed by taking the bi-dimensional correlated Gaussian process as input. Furthermore, in order to control the amplitude and correlation of radar clutter independently and simulate coherent radar clutter with in-phase and quadrature component, the characteristic function of the haplopia G<sup>0</sup> distribution was derived and the simulation methods based on spherically invariant random process were proposed. Simulation results show that both two methods can generate bi-dimensional correlated G<sup>0</sup> distribution radar clutter which meets the requirements of amplitude and correlation.]]></description>
<pubDate>2014/11/25 10:16:02</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GAO Yanzhao,ZHAN Ronghui,LIU Shengqi and WAN Jianwei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GAO Yanzhao,ZHAN Ronghui,LIU Shengqi and WAN Jianwei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405018]]></guid><cfi:id>192</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of SAIM receiver ranging accuracy based on 
ICAO 2nd-order step threat model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Ranging accuracy is an important indicator to assess the performance of satellite autonomous integrity monitoring  receivers in the threat environment. Analytical expressions of the relationship between the accuracy of code tracking loop and the parameters of   International Civil Aviation Organization 2nd-order step threat model when employing coherent early-late processing  in the satellite autonomous integrity monitoring  receiver were presented. Theoretic analysis and simulation results show that the code phase estimator output curve will be biased under the digital failure model and the failure parameters will rarely impact the ranging variance. While the analog failure will distort the cross-correlation function and the code phase estimator output the curve, the curve is almost unbiased, and the ranging variance is affected by the analog failure parameters and receiver parameters such as front-end filter bandwidth and early late code space.]]></description>
<pubDate>2014/11/25 10:16:02</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GUAN Gangqiang,MOU Weihua,LI Baiyu and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUAN Gangqiang,MOU Weihua,LI Baiyu and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405019]]></guid><cfi:id>191</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A view-dependent streamline simplification method for 3D vector 
fields based on feature-preservation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The streamline method is an important method in the visualization of 3D vector fields. A view-dependent streamline simplification method for 3D vector fields based on feature-preservation was proposed to solve the problems of streamline occlusion and visual confusion caused by excessive streamlines, and to ensure the streamlines could present the variation law and important features of vector fields exactly. A streamline set of 3D vector fields was generated by particle tracking and was mapped between view-dependents. A feature-preservation computation of the streamline set was implemented. The streamline set is effectively simplified by computing visual effect metric based on iteration. Experimental results show that the visual effects of the streamlines are enhanced on the basis of valid feature-preservation of vector fields.]]></description>
<pubDate>2014/11/25 10:16:02</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[KONG Longxing,TANG Xiaoan and LI Huan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>KONG Longxing,TANG Xiaoan and LI Huan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405021]]></guid><cfi:id>190</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A new robust extended Kalman filter method for eliminating 
the slowly growing pseudo-range error]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Since the slowly growing psendo-range errors existing in the pseudo-range measurements of satellite navigation system may further lead to the decreasing of position accuracy, a robust extended Kalman filter (EKF) method based on sliding and accumulated residuals was proposed. The method based on the robust EKF algorithm cumulated the residual vectors for multi epochs in the sliding window and increased the pseudo-range error of standardized residual vector, which improved the robustness of slowly growing pseudo-range error. Results show that the method can effectively eliminate or weaken the position error caused by slight pseudo-range error and slowly growing pseudo-range error. Compared with the traditional robust EKF algorithm, the positioning accuracy of this method is improved obviously.]]></description>
<pubDate>2014/11/25 10:16:02</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SHA Hai,TIAN Feng,WANG Donghui,ZHANG Guozhu and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHA Hai,TIAN Feng,WANG Donghui,ZHANG Guozhu and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405022]]></guid><cfi:id>189</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Node selection algorithm in cooperative positioning]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405028]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Cooperative positioning refers to a new positioning technique that receivers share critical positioning information with each other by communication system so as to achieve relative localization. The receivers estimated their position with available secondary nodes which included the localized neighbor receivers and the visible satellites. The cooperation of receivers resulted in the increasing of the available secondary nodes for position estimation, so the calculated amount and the computing time were increased. With the increasing of available secondary nodes, the receivers may fail to estimate their position in real-time. A new node selection algorithm called improved quasi-optimal node selection algorithm was proposed. The nodes to be selected obtained an importance value by calculating the unit vector differences between nodes, and the ones with the maximum importance value were selected as the secondary nodes in each iterate. The new algorithm was compared with four typical node selection algorithms. Simulation result shows that the nodes selected by the proposed algorithm are very close to the ones selected by the optimal algorithm, but the former algorithm costs less time. And the comprehensive performance of the new algorithm is better than the typical node selection algorithm.]]></description>
<pubDate>2014/11/25 10:16:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHANG Qiang,HOU Hongtao,LI Qun and WANG Weiping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHANG Qiang,HOU Hongtao,LI Qun and WANG Weiping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405028]]></guid><cfi:id>188</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A novel algorithm of deception jamming signal with ISAR radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Since many target characteristics can be extracted from the echoes by wideband inverse synthetic aperture radar (ISAR), the jamming signal on ISAR need to simulate the electromagnetic scattering characteristics and kinematics characteristics with high fidelity. According to the electromagnetic scattering mechanism of missile target, the generation process of jamming signal was analyzed and a scheme for two-dimensional imaging jamming was proposed. Concerning the false target characteristic simulation issues, an algorithm was presented, using high range resolution profile (HRRP) template to synthesize a deception jamming signal via convolution operation with actual ISAR signal. By multiple pulses simulations, the obtained jamming signal is capable of simulating the electromagnetic and kinematic characteristics accurately. In numerical experiments, the imaging results were compared by using dark room measurements and HRRP template data, and it verified the effectiveness of the proposed algorithm, which has guiding significance for the engineering design of two-dimensional imaging jammer.]]></description>
<pubDate>2014/9/4 17:19:44</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Xufeng<sup>1</sup>,TANG Hongbin<sup>2</sup> and XU Shaokun<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Xufeng<sup>1</sup>,TANG Hongbin<sup>2</sup> and XU Shaokun<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404009]]></guid><cfi:id>187</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Spoofing detection technique on antenna array 
carrier phase double difference]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For the navigation signal spoofing signal transmitted with single antenna, a spoofing detection technology based on multi-antenna carrier phase double difference was stuied. Three-antenna array, in which not all antennas are placed in direct line, was proved to be the minimum antenna array which can solve the navigation signal arrival angle without ambiguity. Based on the corresponding antenna array, a method for constructing spoofing test statistic based on multi-antenna carrier phase double difference was proposed, and the detection performance analyzing method was presented. Then, the minimum detection threshold was defined for limiting the decrease of the detection performance. Finally, detection performance of the proposed detection method was simulated by Monte Carlo method, and the results validate the correctness of theory analysis.]]></description>
<pubDate>2014/9/4 17:19:44</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Xin,PANG Jing,SU Yingxue and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Xin,PANG Jing,SU Yingxue and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404010]]></guid><cfi:id>186</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Method of pseudo-range Doppler simulation 
in navigation channel simulator  on VFD filter]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In satellite navigation channel simulator, the traditional pseudo-range Doppler simulation method has some flaws, such as the low delay accuracy  and the large filter resource. A new Doppler simulation method is proposed, using Lagrange interpolation variable fraction delay filter and Farrow structure. Based on analyzing the system architecture of channel simulator, the model of Doppler simulation was established, including the delay calculation module and variable delay filter. Compared with the multi-rate sampling digital delay filter method, the proposed method is just about 0.2% of the former filter resource, and the one parameter is just changed when the delay of filter is changed. Actual measured results with channel simulator indicate that the Doppler accuracy is 0.1 mHz.]]></description>
<pubDate>2014/9/4 17:19:44</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SHA Hai,HUANG Xinming,ZHANG Xin,MOU Weihua and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHA Hai,HUANG Xinming,ZHANG Xin,MOU Weihua and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404011]]></guid><cfi:id>185</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Statistical properties of mobile cascade channel in amplify-and-forward two-way relay networks]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The statistical properties of mobile cascade channel in amplify-and-forward (AF) two-way relay networks (TWRN) is focused on. Based on the statistical properties of double Gaussian, the mobile cascade channel is divided into transmission and interference processes. In addition, the probability distribution functions (PDF), temporal auto-correlation functions (ACF) and Doppler spectrums of the two processes are derived, respectively. Furthermore, by approximating the PDFs of the cascade channel by the concise Gamma distributions, closed-form and approximated expressions of two critical temporal merits, level-crossing rate (LCR) and average duration of fades (ADF), are provided. Numerical simulation demonstrates the validity of the proposed expressions. ]]></description>
<pubDate>2014/9/4 17:19:44</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Haibin,XIANG Liangjun,YUAN Jibing and ZHENG Linhua]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Haibin,XIANG Liangjun,YUAN Jibing and ZHENG Linhua</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404012]]></guid><cfi:id>184</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Three-dimensional motion error correction for unmanned 
aerial vehicle synthetic aperture radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For the parameters estimation of synthetic aperture radar (SAR) raw data, the estimation of Doppler rate is robust with the advantage of high estimation precision and less dependence upon situations. Thus it is widely employed in the autofocus correction. Based on the estimation of Doppler rate, two different error extraction models for the range migration and phase are proposed, respectively. The three dimension (3-D) motion errors are removed by correcting the residual range cell migration and compensating the phase errors, respectively. Real SAR data test shows that the proposed method is feasible to generate high resolution SAR image with only low-accuracy navigation information.]]></description>
<pubDate>2014/9/4 17:19:44</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[JIA Gaowei and CHANG Wenge]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIA Gaowei and CHANG Wenge</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404013]]></guid><cfi:id>183</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A general quasi-optimal demodulation  design 
for FQPSK and SOQPSK]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[According to the IRIG-106 telemetry standard, FQPSK-JR and SOQPSK-TG are two interchangeable signals, which have almost the same power efficiency and bandwidth efficiency. The two signals can be demodulated by the universal receiver of OQPSK. The optimal performance degradation of the symbol by symbol demodulation based on the OQPSK structure can reach 2dB while its optimal demodulation may ignore the two signals' characteristics of memory. The 2dB power loss is crucial in the telemetry link for the limit of equipment size and power. The optimum receivers based on their modulation schemes can improve the power efficiency, but the different system of signal generating will lead to different structure of corresponding optimal receiver. In this research, the FQPSK-JR signal in IRIG-106 standard was approximated by CPM modulation, the SOQPSK-TG signal was truncated for an approximate analysis. The result of simulation showed that the signals demodulated by the CPM-based demodulator and by the OQPSK-based demodulator display the same function of little with incremental loss, and demand no need to do signals recognition. In addition, the implementation complexity was also taken into account.]]></description>
<pubDate>2014/9/4 17:19:44</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XI Zhipeng<sup>1</sup>,ZHAI Haitao<sup>1</sup>,ZHONG Sheng<sup>2</sup> and ZHU Jiang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XI Zhipeng<sup>1</sup>,ZHAI Haitao<sup>1</sup>,ZHONG Sheng<sup>2</sup> and ZHU Jiang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404014]]></guid><cfi:id>182</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Chinese named entity recognition 
combined active learning with self-training]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Named Entity Recognition (NER) is a basic task in information extraction, and it is an important research direction in this domain to use the abundant unlabeled corpus to improve the performance of NER system. An approach combining self-training with active learning based on CRF (SACRF) is proposed. It selected samples by setting the threshold of confidence and 2-Gram frequency, and expanded the training set by annotating the unlabeled corpus manually and automatically. The experiments revealed that this approach can not only improve the precision and recall of NER system, but also reduce the manually annotation efforts greatly. ]]></description>
<pubDate>2014/9/4 17:19:44</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHONG Zhinong,LIU Fangchi,WU Ye and WU Jiangjiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHONG Zhinong,LIU Fangchi,WU Ye and WU Jiangjiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404015]]></guid><cfi:id>181</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design of DS-CDMA system  on sparse graph]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[DS-CDMA developed on spread spectrum is a multiple access technology, but it is difficult for such a system to attain a satisfactory performance under overloading conditions. A sparse DS-CDMA system is presented. It is possible to represent the relationship between the chips and the users using a low density Tanner graph. By doing so, each user is only connected to limited non-zero chips, which can minimize the multiuser interference. According to graph theory, a belief propagation algorithm, which is suitable to the case of low density graph, was adopted by the sparse DS-CDMA to perform multiuser detection. Thus the negative effect of channel noisy and interference can be eliminated. Computer simulation was done. The theory analysis and simulation results showed that the sparse DS-CDMA can achieve excellent performance even under serious overloading conditions.]]></description>
<pubDate>2014/9/4 17:19:44</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WEN Lei<sup>1</sup>,LEI Jing<sup>1</sup>,WEI Jibo<sup>1</sup> and LI Saisi<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WEN Lei<sup>1</sup>,LEI Jing<sup>1</sup>,WEI Jibo<sup>1</sup> and LI Saisi<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404016]]></guid><cfi:id>180</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Single frequency two-dimensional synthetic aperture 
imaging system and imaging algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Traditional synthetic aperture radar uses wideband signal to achieve range resolution, and uses one-dimensional synthetic aperture to achieve azimuth resolution, thereby forming a two-dimensional image. In the cases of short range imaging, a very high imaging resolution may be required, and it is difficult to achieve such high resolution using signal bandwidth. A two-dimensional synthetic aperture imaging system is proposed; it uses the two-dimensional synthetic aperture to achieve two-dimensional resolution. The resolution depends on the length of the synthetic aperture, and it is no longer limited by the signal bandwidth and can obtain ultra-high resolution. The transmitted signal is single frequency waveform, thus the system can be very simple. The imaging algorithm for the single frequency two-dimensional synthetic aperture imaging system was derived in detail. Simulation results showed that the single frequency two-dimensional synthetic aperture imaging system is an effective technique for high resolution imaging.]]></description>
<pubDate>2014/9/4 17:19:44</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Yinsheng<sup>1</sup>,YANG Jungang<sup>2</sup>,AN Wei<sup>2</sup> and LIU Kun<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Yinsheng<sup>1</sup>,YANG Jungang<sup>2</sup>,AN Wei<sup>2</sup> and LIU Kun<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404017]]></guid><cfi:id>179</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Researches on future ultra-precision  CSGM satellite gravity mission in China]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The research demonstrations on the implementation of the future CSGM satellite gravity mission in China were carried out, based on the preferable selection of satellite tracking modes, the optimal combination of key payloads, the preferred design of orbital parameters, the beforehand execution of simulated studies, and the optimum improvement of gravity recovery methods. Firstly, the Satellite-to-Satellite Tracking in the High-Low/Low-Low mode (SST-HL/LL) was used in the future CSGM satellite gravity mission due to the high-accuracy measurement of  the Earth's gravitational field, the lower technical requirements and the successful experiences of the current twin GRACE satellites. Secondly, the space-borne instruments consisting of the interferometric laser intersatellite ranging system, the compound GPS receiver, the drag-free system, the center of mass trim assembly, etc. were developed in advance. Thirdly, the orbital altitude of 300～400 km and the intersatellite range of 100±50 km were designed in the unmeasurable area of the existing gravity satellites. Fourthly, the simulation techniques were applied to the holistic processes of the development and operation for CSGM, including scheme demonstration, system design, parts development, production test, practical application and malfunction analysis. Fifthly, the advantages and disadvantages of the satellite orbital perturbation, dynamic, energy conservation and semi-analytic methods were contrastively analyzed, and the new-type, high precision, high-efficiency and full-frequency satellite gravity recovery methods were investigated. Finally, the expected scientific objectives of the future CSGM satellite gravity mission showed that the cumulative geoid height error is 1～5 cm and the cumulative gravity anomaly error is 1～5 mGal at degree 300.]]></description>
<pubDate>2014/9/4 17:19:43</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHENG Wei<sup>1</sup>,XU Houze<sup>1</sup>,ZHONG Min<sup>1</sup>,LIU Chengshu<sup>1</sup> and YUN Meijuan<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHENG Wei<sup>1</sup>,XU Houze<sup>1</sup>,ZHONG Min<sup>1</sup>,LIU Chengshu<sup>1</sup> and YUN Meijuan<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404018]]></guid><cfi:id>178</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Multi-sensor images registration using multi areas standardized 
histogram of oriented gradient and spatial adjacent similarity]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Multi-sensor images matching method based on multi-area histogram of oriented gradient is proposed. Firstly, the images were segmented into some sub-areas. Secondly, histogram of oriented gradient was calculated for every subregion. Then, the histograms similarity was computed with convergence degree as power. In the end, through two-step searching, the histogram with the highest similarity was found and the corresponding image was the matching result. The algorithm was tested using emulational images and real multi-sensor images. Experimental results showed that the new matching algorithm can match multi-sensor images effectively and efficiently. ]]></description>
<pubDate>2014/9/4 17:19:44</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Yidan<sup>1</sup>,LI Bin<sup>2</sup>,LI Zhuang<sup>1</sup> and YANG Xia<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Yidan<sup>1</sup>,LI Bin<sup>2</sup>,LI Zhuang<sup>1</sup> and YANG Xia<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404019]]></guid><cfi:id>177</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A satellite networks visualization method 
with dynamical topological graph]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A visualization method based on dynamic topological graph specific to satellite networks changing over time is proposed. The challenge of dynamical topological graph visualization lies in how to preserve the dynamic stability during visualization process and facilitate the perception of dynamic change of networks for users. Firstly, a continuous dynamical topological graph model was built, based on the analysis of dynamic characteristic of satellite networks. Then, a strategy for preserving dynamic stability of layout was designed and a dynamical topological graph layout algorithm was proposed, based on force-directed. Finally, the Iridium system was taken as a representative instance and the rationality and feasibility of our approach was validated. The experiment illustrated that the visualization results of our approach effectively supports the perception and understanding of dynamic topological of satellite networks.]]></description>
<pubDate>2014/9/4 17:19:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HU Huaquan<sup>1,2</sup>,WU Lingda<sup>1,2</sup>,YANG Chao<sup>2</sup> and SONG Hanchen<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Huaquan<sup>1,2</sup>,WU Lingda<sup>1,2</sup>,YANG Chao<sup>2</sup> and SONG Hanchen<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404020]]></guid><cfi:id>176</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Phase signature of active decoy and Its application in angular 
deception jamming using interrupted-sampling repeater]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The phase signature of active decoy and its application in angular deception Jamming using Interrupted-Sampling Repeater Jamming(ISRJ) were investigated in detail. After the principles of ISRJ were expounded, the phase signature of different-order active decoy and the influential factors were analyzed. According to the principle of monopulse radar angle tracking, several conditions that should be met for jamming source were deduced, including the repeater power, the delay time and frequency of repeater. Then, the effects of correlative and non-correlative interference on angular deception were discussed, respectively. Simulation results show that the decoy can bait monopulse radar system by flexible parameter design. This research is beneficial to the jamming design and use of ISRJ．]]></description>
<pubDate>2014/7/17 17:22:24</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[FENG Dejun,XU Letao and WANG Xuesong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FENG Dejun,XU Letao and WANG Xuesong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403024]]></guid><cfi:id>175</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Cascade channel estimator based on Kalman filter for 
amplify-and-forward two-way relay networks]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A cascade channel estimation of Amplify-and-Forward (AF) two-way relay networks (TWRN) was investigated, and a new estimator was proposed based on Kalman filter. Firstly, a cascade channel of AF TWRN was divided into self-interference part and transmission part functionally. Then, auto-correlation functions of these two parts (ACF) were approximated by auto-regressive (AR) model to obtain the Gauss-Markov process of the channel, and the resultant Kalman estimator was deduced according on the received training signals. After the property of convergence was proved, the bound of mean square error (MSE) was also derived in the form of Riccati equation. The final numeral simulation demonstrates that the new estimator outperforms its maximum likelihood (ML) counterpart in the merit of MSE.]]></description>
<pubDate>2014/7/17 17:22:24</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Haibin,DING Hong,XIANG Liangjun and ZHENG Linhua]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Haibin,DING Hong,XIANG Liangjun and ZHENG Linhua</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403025]]></guid><cfi:id>174</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Effect of ionosphere dispersion on the navigation signal receiving]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Ionosphere is a typical dispersive  medium, which may cause frequency depended delay to navigation signal. In the practical applications, the ionosphere delay between signals at different frequencies is considered only, while the effect of ionosphere dispersion on the receiving for a single navigation signal is usually ignored. A module was established to analyze the effect of ionosphere dispersion. Base on this module, the effect of ionosphere dispersion on some typical wide-band navigation signals was analyzed, such as BPSK(10), BOC(14,2), AltBOC(15,10) signals. The analysis results indicate that the effect on BPSK(10) signal can be ignored, but some correlation loss and carrier phase tracking error will be introduced into the track of high order BOC signals, such as BOC(14,2) signal and AltBOC(15,10) signal, and the correlation loss and carrier phase tacking error of AltBOC(15,10) can be 1.4dB and 0.185 cycles separately.]]></description>
<pubDate>2014/7/17 17:22:24</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XIAO Zhibin,LIU Yingxiang,TANG Xiaomei and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIAO Zhibin,LIU Yingxiang,TANG Xiaomei and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403026]]></guid><cfi:id>173</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Spatial-time-frequency  direction association algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A novel spatial-time-frequency data association (STFDA) algorithm is proposed by taking advantage of the time-frequency separation between different frequency-hopping signals, which uses the time-frequency center as the basis of association. The time-frequency characteristics extracted from time-frequency analysis were used to design appropriate core function and construct a simplified TF-MUSIC algorithm. The Hungarian algorithm was incorporated in STFDA to search the best association scheme according to the cost functions from the time-frequency distance of different signals. Appropriate window function designed on time-frequency distance can prevent the side robe leakage from decreasing the precision of direction estimation, and improve the association correction probability. The simulation results confirm the feasibility and superiority of the proposed algorithm.]]></description>
<pubDate>2014/7/17 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LU Shujun,WANG Shilian,ZHU Jiang and ZHANG Eryang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Shujun,WANG Shilian,ZHU Jiang and ZHANG Eryang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403027]]></guid><cfi:id>172</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Automatic recognition method of radar antenna scan type]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403028]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to recognize radar antenna scan type (AST) automatically, an improved antenna scan pattern simulator was developed, and features extraction and automatic recognition methods for electronic scan type (EST) and mechanical scan type (MST) were studied respectively. EST was firstly distinguished from MST based on the characteristic parameters extracted from the maximum main beam pulse sequence; then 8 MSTs were automatically recognized based on the parameters extracted from the pulse sequence in a scan period. The simulation results show that it is able to distinguish between one-dimensional EST, two-dimensional EST and MSTs by this method. Moreover, the correct recognition ratio of MSTs by support vector machine decision tree (SVMDT) is higher than that by decision tree (DT).]]></description>
<pubDate>2014/7/17 17:22:24</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Cheng,WANG Wei,SHI Longfei and WANG Xuesong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Cheng,WANG Wei,SHI Longfei and WANG Xuesong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403028]]></guid><cfi:id>171</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Range-dependent phase error compensation of dechirp]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403030]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To reduce the pressure of data processing, the dechirp operation is adopted. However, dechirp will result in range-dependent phase errors in the beat signal. an algorithm to compensate the range-dependent phase error is proposed, using the phase error extracted from the transmitted signal with the supposition that the phase error varies slowly. The compensation approach is executed in two steps: first, compensating the phase error involved by the transmitted signal after dechirp; second, compensating the residual phase error after RVP correction. Both the simulation and the real data experiments suggest that the proposed algorithm is effective.]]></description>
<pubDate>2014/7/17 17:22:24</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHAO Zhiyong,CHANG Wenge,LI Xiangyang and Jia Gaowei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAO Zhiyong,CHANG Wenge,LI Xiangyang and Jia Gaowei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403030]]></guid><cfi:id>170</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Two dimensional local-constrained coding and sparse representation 
for SAR images targets recognition]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403031]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[By analyzing the limitation of the traditional sparse representation based classification, a novel classification framework called two dimensional Local-constrained Coding and Sparse Representation (2D-LSRC) is proposed for Synthetic Aperture Radar (SAR) images recognition. Different from other recent popular vector-based representation, 2D-LSRC preserves the global linear coding coefficients between the input matrix and these elementary matrices, as well as the local data structure. Extensive experimental results of MSTAR datasets show the effectiveness of the proposed algorithms and its robustness for the number of the training dataset.]]></description>
<pubDate>2014/7/17 17:22:24</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[JIN Bin<sup>1,2</sup>,ZHANG Jing<sup>3</sup>,WANG Wei<sup>4</sup> and ZHANG Jun<sup>4</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIN Bin<sup>1,2</sup>,ZHANG Jing<sup>3</sup>,WANG Wei<sup>4</sup> and ZHANG Jun<sup>4</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403031]]></guid><cfi:id>169</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Low angle tracking algorithm using frequency diversity 
for array radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201402016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The low angle tracking problem was investigated for shipborne X-band array radar working at frequency diversity mode. Firstly, the receiving array signal model with multi-frequency was established in multi-path environment based on the relation between complex reflection coefficient (CRC) and grazing angle of seawater at X band. Then, the research put forward the MFML (Multi-Frequency Maximal Likelihood) elevation spectrum, in which the elevation ambiguity is alleviated by frequency diversity. The spacing between spectrum peaks was presented. The influence on elevation spectrum of frequency width was analyzed. Lastly, the probability of exact peak selection was proposed to describe the elevation estimation performance. Elevation estimation performance was evaluated by simulation, related to SNR and target elevation. Given target elevation, the minimal SNR was obtained for a certain angular accuracy, which is not strictly monotone downtrend with target elevation.]]></description>
<pubDate>2014/5/14 17:10:48</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Zhenhai, HUANG Tan, XIONG Ziyuan, XIAO Shunping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Zhenhai, HUANG Tan, XIONG Ziyuan, XIAO Shunping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201402016]]></guid><cfi:id>168</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Computing the recursive posterior Cramer-Rao bound 
for magnetic target tracking]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201402020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The PCRB-GMSPPF algorithm is proposed in order to achieve the computation of posterior Cramer-Rao bound in magnetic target tracking issues. In the proposed method, the GMSPPF algorithm is adopted to perform the sampling toward the actual posterior distribution of target state, hence the Fisher information matrix at each observation time in PCRB computation can be approximated using Monte Carlo integral method.  The proposed method overcomes the depletion and degeneracy problem which causes the failure to correctly sample in posterior distribution. The simulation analysis is performed on the basis of the establishment of magnetic target tracking state model and observation model. The proposed PCRB is compared with the mean square error  performance of tracking using GMSPPF and PF algorithm to validate correctness of proposed PCRB computation algorithm. The results exhibits that PCRB-GMSPPF outperforms the PCRB-PF in accuracy for magnetic target tracking issues, and can be generalized for general non-linear tracking model analysis for error lower bound.]]></description>
<pubDate>2014/5/14 17:10:48</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Zhidong, ZHOU Suihua, ZHANG Hongxin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Zhidong, ZHOU Suihua, ZHANG Hongxin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201402020]]></guid><cfi:id>167</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on variable rate modulator and its 
implementation on FPGA]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201402021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A variable modulator scheme is presented. The hardware system adopting the proposed approach was accomplished based on field programmable gate array (FPGA). The proposed system can deal with signals with bit rate even varying from （13.5～300）Mbps continuously. By splitting the whole rate range into several small parts and filtering the input data with different interpolation times, the correctness of transferring all rates into the dealing range of digital analog convert (DAC) was ensured. The architecture of system was devised and the difficulties in hardware realization were analysed. The ways to solve the pivotal problem were particularly indicated. Realization on FPGA demonstrates the good performance of the proposed idea. The expansibility of system makes it easy to be applied in wider rate bound.]]></description>
<pubDate>2014/5/14 17:10:48</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHAI Haitao, XI Zhipeng, ZHANG Eryang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAI Haitao, XI Zhipeng, ZHANG Eryang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201402021]]></guid><cfi:id>166</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A spatial pyramid model based on binary pattern 
of oriented gradients]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201402022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Recently spatial pyramid matching (SPM) with scale invariant feature transform (SIFT) descriptor has been successfully used in image classification. Unfortunately, the codebook generation and feature quantization procedures using SIFT feature have the high complexity both in time and space. To address this problem, a feature descriptor called Binary Pattern of Oriented Gradients is presented. Firstly, the input image was densely sampled and divided into small uniform image patches. Secondly, each patch was divided into 2*2 grids uniformly. For all grids the histograms of oriented gradient were computed and all dominant directions of the histograms were coded by binary coding. Then the descriptor was generated by converting the binary number to decimal number. Finally, this descriptor was combined in the spatial pyramid domain. Experiments on popular benchmark dataset demonstrate that the proposed method always significantly outperforms the popular SPM based SIFT descriptor method both in time and classification accuracy.]]></description>
<pubDate>2014/5/14 17:10:48</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GUO Jun<sup>1</sup>, ZHOU Hui<sup>2</sup>, ZHU Changren<sup>1</sup>, XIAO Shunping<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUO Jun<sup>1</sup>, ZHOU Hui<sup>2</sup>, ZHU Changren<sup>1</sup>, XIAO Shunping<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201402022]]></guid><cfi:id>165</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Mixedclock third-order DDS applied in signal Doppler 
frequency shift simulation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201402023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Doppler frequency shift simulation is a key technique in high dynamic satellite navigation signal simulator. Considering the features of field programmable gate array, a mixed-clk third-order direct digital synthesizer (DDS) simulation model was built, and its output phase expression was derived. The calculation method for initial control word for each stage DDS was given and it was pointed out that the same-clk third-order DDS simulation model is only a special case of mixed-clk simulation model. After analyzing the signal phase error caused by mixed-clk, the word length design method for each stage DDS was discussed. Comparison between the same-clk third-order DDS and the mixed-clk third-order DDS can reduce both resource and power consumption. Simulation results indicate that the proposed method can be used to simulate signal Doppler is of high precision.]]></description>
<pubDate>2014/5/14 17:10:48</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Xin, LI Caihua, HUANG Yangbo, ZHANG Guozhu, OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Xin, LI Caihua, HUANG Yangbo, ZHANG Guozhu, OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201402023]]></guid><cfi:id>164</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Reconstruction error of azimuth multiple-phase-center]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201401011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Influence of array errors of azimuth multiple-phase-center (AMPC) synthetic aperture radar (SAR) on signal reconstruction performance is investigated. The array errors were modeled as stochastic process. In combination with least-square (LS) algorithm, the analytical expression of the reconstruction error power spectrum was derived. Then, the analytical expressions of signal to noise ratio (SNR) and azimuth ambiguity to signal ratio (AASR) were obtained. Experiment results confirm the validity of the theoretical analyses. Analytical results indicate that the image quality of AMPC SAR can be improved by decreasing the reconstruction coefficient when the pulse repetition frequency (PRF) increases. The approaches and results are helpful to the system design and the image quality evaluation of AMPC SAR. ]]></description>
<pubDate>2014/3/12 14:49:31</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[MA Xile,DONG Zhen,HE Feng,SUN Zaoyu and LIANG Diannong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>MA Xile,DONG Zhen,HE Feng,SUN Zaoyu and LIANG Diannong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201401011]]></guid><cfi:id>163</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A novel navigation inter-satellite links ranging hierarchy and its orbit 
determination performance]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201401012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The present polling time division duplex (PTDD) ranging hierarchy of GPS inter-satellite links (ISL) demands being optimized for satellite orbit determination. An improved ranging hierarchy named grouping time division duplex (GTDD) is presented. Satellite orbit determination precision based on inter-satellite and satellite-to-station ranges is able to be improved by the novel ranging hierarchy in respect of ISL ranging links increasing by grouping ranging of the whole constellation. Aiming at the optimal satellite orbit determination precision, a two-steps algorithm is presented to optimize the satellite grouping. Firstly, the optimal satellite groupings were obtained to achieve the most inter-satellite ranging links. Secondly, the ranging DOP was made the least in each satellite group. Simulation results show that the satellite orbit determination precision can be improved greatly from the two-steps algorithm.]]></description>
<pubDate>2014/3/12 14:49:31</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Donghui,XU Bo,LIU Wenxiang and SUN Guangfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Donghui,XU Bo,LIU Wenxiang and SUN Guangfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201401012]]></guid><cfi:id>162</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Path selecting strategy in LEO satellite network]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201401013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The transmission delay and the number of hops in path are the two main factors which should be considered in designing a routing algorithm for a specific network. The paths generated by different routing strategs are called least delay path (LDP) and least hop path (LHP). In satellite network, the algorithm for LHP is much simpler, but there are limited research achievements for the rationality of LHP. A detailed theoretical analysis, in this research, was made for the differences between LDP and LHP in polar circular LEO satellite network. Based on the results of our analysis, a simplified LHP path selecting strategy with an idea of horizontal transmitting priority (HTP) by using the features of horizontal link length was proposed. The simulation results prove that our path selecting strategy can quickly find out the shortest path among all the LHP between every two nodes. It provides a foundation for the research of routing algorithms in LEO satellite network.]]></description>
<pubDate>2014/3/12 14:49:31</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[DUAN Sirui,LIU Yuanan,HU Hefei and LI Hu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DUAN Sirui,LIU Yuanan,HU Hefei and LI Hu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201401013]]></guid><cfi:id>161</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Jamming imaging radars based on pulse separation 
and retransmission]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201401014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Multiple false-target images deception is the thorny point in the jamming against broad-band imaging radars. A jamming approach of applying pulse separation is proposed and the retransmission the usual LFM signal of imaging radar is presented. Combined with the scatter-wave jamming model, the imaging of the jamming signal was expounded, and the ways to achieve a train false-target images along the down-range were analyzed. Based on the divided number and the retransmitted order, the number and the resolution of false-target images were described. Finally, the simulation results are presented and addressed. This work is helpful to the deception jamming against imaging radars.]]></description>
<pubDate>2014/3/12 14:49:31</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[PAN Xiaoyi<sup>1，2</sup>,WANG Wei<sup>1</sup>,FENG Dejun<sup>2</sup>,FU Qixiang<sup>2</sup>,LIU Yongcai<sup>1,2</sup> and WANG Guoyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PAN Xiaoyi<sup>1，2</sup>,WANG Wei<sup>1</sup>,FENG Dejun<sup>2</sup>,FU Qixiang<sup>2</sup>,LIU Yongcai<sup>1,2</sup> and WANG Guoyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201401014]]></guid><cfi:id>160</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[ISAR imaging of stepped-frequency based on image 
contrast optimization]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201401017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In stepped-frequency high resolution ISAR imaging radar, target motions produce the range-Doppler coupling which has a serious effect on the ISAR image. Consequently, a novel motion-parameters estimation method based on the image contrast optimization is proposed. Firstly, the effect of radical velocity and acceleration on Doppler profile contrast function was analyzed. Secondly, after constructing phase compensation term, the radical acceleration was estimated by the Doppler profile contrast function. After the radical acceleration compensation, the radical velocity was estimated by the range profile contrast function. Finally, after motion compensation and range-Doppler algorithm, the high resolution ISAR image was obtained. This method has some advantages of high accuracy and fast computation speed. The experimental results demonstrate the effectiveness of the proposed method. ]]></description>
<pubDate>2014/3/12 14:49:32</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Jie,XIAO Huaitie,FAN Hongqi and SONG Zhiyong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Jie,XIAO Huaitie,FAN Hongqi and SONG Zhiyong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201401017]]></guid><cfi:id>159</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Anti-jamming algorithm for GNSS antenna array aided by carrier phase]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[An anti-jamming algorithm for satellite navigation antenna array aided by carrier phase was proposed to mitigate the interference of satellite navigation receiver. The blind null steering was achieved through the algorithm and the blind beam steering was realized simultaneously with the aid of the carrier phase of the output signal from each individual antenna, and two steerings could be switched by a control algorithm. The simulation results show that the proposed algorithm performs well at “cold” start when the receiver is initiated in strong interference conditions. It can enhance the satellite signals by steering beams to the satellites under noninterference or weak interference conditions, so the visibility and positioning accuracy of satellite are improved. The proposed algorithm can work normally without the aid of inertial measurement unit, and is robust to the steering vector errors caused by amplitude-phase mismatch. It has less cost than traditional beamforming algorithms for implementation.]]></description>
<pubDate>2015/12/31 10:11:16</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Feiqiang, NIE Junwei, SU Yingxue and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Feiqiang, NIE Junwei, SU Yingxue and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506014]]></guid><cfi:id>158</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Ionosphere dispersion effects simulation for high order BOC modulated signals]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The time delay and dispersion effects caused by the ionosphere need to be simulated in the navigation signal simulator. The higher order BOC modulation signal in the new generation of satellite navigation signals has a wider bandwidth than the traditional navigation signal. The simulation method of the traditional navigation signal can lead to the non-negligible modeling error of the ionosphere delay. An improved simulation method of BOC signal based on the bilateral model was presented, and  was verified by simulation. The simulation results show that there is an error of meter in the ionosphere delay of the BOC (14, 2) signal, and the improved method can accurately simulate the effect of the ionosphere dispersion.]]></description>
<pubDate>2015/12/31 10:11:17</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[PANG Jing, LIU Yingxiang, TANG Xiaomei and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PANG Jing, LIU Yingxiang, TANG Xiaomei and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506015]]></guid><cfi:id>157</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Joint sorting and location method using TDOA and multi-parameter of multi-station]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In multi-station electronic reconnaissance system, TDOA (Time Difference Of Arrival) of the pulse signal received by two stations can be used for signal sorting and positioning. A novel method for joint sorting and location based on TDOA and multiparameter of multi-station was proposed to deal with the problem of being unable to sort the signals with very few pulses caused by weak correlation between pulse information of complex signals in order to obtain final sorting and location results,  the pulses of all stations were presorted by the presented method with TDOA window information and the presorting results were integrated according to targets’ positions. Simulation results show that the proposed method is applicable and effective, which can implement the pulse signal sorting and positioning with very few pulses and even a single pulse sorting and positioning.]]></description>
<pubDate>2015/12/31 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[MA Xiantong, LUO Jingqing and WU Shilong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>MA Xiantong, LUO Jingqing and WU Shilong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506016]]></guid><cfi:id>156</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An optimal retrieval method of multi-theme image tiles considering the spatio-temporal semantics]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the invalid accesses and memory redundancies caused by data overlap of more than one logic map tile in the visualization process of virtual earth, an optimal retrieval method of multi-theme tiles considering the spatio-temporal semantics was proposed. On the client side, the self-adoptive retrieval of tiles considering spatio-temporal semantics automatically matches the viewpoint information with semantics of datasets like space-time range, resolution and priority, then the invalid selection was filtered and the efficiency of target tiles data hit ratio was improved. On the server side, the theme oriented data cache based on memory database was achieved to prompt the response speed of server in the second access of tiles. Finally, the experiments prove that this method can prevent stable and high hitrate of target tile affected by amount of datasets and the cache method can further improve the efficiency of tiles access. The realtime visualization performance of massive image data is significantly improved.]]></description>
<pubDate>2015/11/9 16:21:57</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[QIU Linyao<sup>1,3</sup>, WANG Meng<sup>1,3</sup>, ZHU Qing<sup>2,3</sup> and DU Zhiqiang<sup>1,3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>QIU Linyao<sup>1,3</sup>, WANG Meng<sup>1,3</sup>, ZHU Qing<sup>2,3</sup> and DU Zhiqiang<sup>1,3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505003]]></guid><cfi:id>155</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A novel data decomposition method for rapid parallel processing of vector polygon rasterization]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505004]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[According to the load balance problem of large-scale parallel vector polygon rasterization, a novel data decomposition method was proposed. Firstly, the number of polygon nodes or the number of polygons was employed to evaluate the amount of calculations of a subset. The spatial locations of decomposed lines were computed iteratively and the balanced calculations between decomposed subsets were guaranteed, so as to realize data decomposition and load balancing. Secondly, a binary-tree based fusion strategy was put forth to merge the polygons across multiple subsets. The proposed parallel algorithm was implemented under a multi-core CPU-based environment and multiple China land use datasets were employed. Experimental results show that the presented method can outperform conventional methods for different datasets and can achieve a higher speed-up ratio and good load balancing. Moreover, when dealing with a large-scale vector dataset, the number of polygonal nodes is more appropriate to be the metric to evaluate the calculation of a subset precisely.]]></description>
<pubDate>2015/11/9 16:21:57</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHOU Chen, LI Manchun, CHEN Zhenjie, JIANG Penghui and CHEN Dong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Chen, LI Manchun, CHEN Zhenjie, JIANG Penghui and CHEN Dong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505004]]></guid><cfi:id>154</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Iterative optimization for camera self-calibration from a single image]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505005]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The camera calibration from vanishing points is easily distracted by noise in the image, leading to inaccurate results which are often inadmissible for camera calibration. To overcome the limitation, an iterative optimization approach,  which makes full use of geometric constraints of vanishing points and ellipse in the image, was presented for selfcalibration from single image. According to the polepolar relationship and the orthogonality represented by it, a set of orthogonal conjugate vanishing point pairs were calculated through using the ellipse curve and the coplanar vanishing line. A nonlinear model of the principle distance and principle point was established on the basis of these vanishing point pairs. Choosing the minimum variance of principle distances as optimization criterion and setting multiple points as the initial values of the principle point, the principle distance and principle point were iteratively optimized and their optimal results were obtained. Simulated results and real data show that the approach can effectively realize camera selfcalibration from a single image. Compared with the camera calibration method using vanishing points, the approach achieves more satisfactory calibration results.]]></description>
<pubDate>2015/11/9 16:21:57</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Dan<sup>1</sup>, LIU Xuejun<sup>1,2</sup> and WANG Meizhen<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Dan<sup>1</sup>, LIU Xuejun<sup>1,2</sup> and WANG Meizhen<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505005]]></guid><cfi:id>153</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Parallel checking method for point-line topological consistency in cadastral database]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The current topology inspection methods which use serial computation method accompanied with the complicated algorithms and excessive calculation amount cannot satisfy the demands of the efficient topology inspection for massive cadastral data. On the basis of the characteristics of topology calculation between point and line, the parallel topological computing method aiming at boundary points and lines has been implemented by combining the decomposition method for boundary points data with the Q tree and R tree spatial index method for boundary lines data. The topology parallel tests using the datasets of boundary points and lines in one area was taken in this method. The results show that the parallel efficiency of the algorithm which decreased with the increased number of processes steady maintains at above 30%, and the parallel speedup ratio reaches up to 5. The computation efficiency is improved more than 30 times than that of ArcGIS. The method can be used as a tool in high performance geographic information system and achieves good application effect.]]></description>
<pubDate>2015/11/9 16:21:57</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YANG Yizhou<sup>1</sup>, WU Lixin<sup>1,2</sup>, GUO Jiateng<sup>1</sup> and LIU Shanjun<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Yizhou<sup>1</sup>, WU Lixin<sup>1,2</sup>, GUO Jiateng<sup>1</sup> and LIU Shanjun<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505007]]></guid><cfi:id>152</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Parallel signal blind area computing of BeiDou geostationary orbit satellite]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to improve the computing efficiency of signal blind area for BeiDou geostationary orbit satellites, it requires more computing resources in parallel computing environment. According to the analysis on parallel characteristics of the existing resolving principle and algorithm, a novel algorithm was designed for computing signal blind area of BeiDou geostationary orbit satellites based on elevation angle related dynamic blind influence scope. Based on this algorithm, the parallel computing tasks of signal blind area was divided and arranged by raster data partition. An experiment was taken for computing the blind area in china based on 59 scene digital elevation model data and 8 processes, and spent about 5 hours. The result shows that the parallel efficiency of the algorithm decreases with the increasing process count, but stably maintains at more than 96%. The method has been integrated as a tool in high performance geographic information system and can obtain good application effect.]]></description>
<pubDate>2015/11/9 16:21:57</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GUO Jiateng<sup>1</sup>, WU Lixin<sup>1,2</sup>, YANG Yizhou<sup>1</sup>, LI Chaoling<sup>3</sup> and LIU Shanjun<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUO Jiateng<sup>1</sup>, WU Lixin<sup>1,2</sup>, YANG Yizhou<sup>1</sup>, LI Chaoling<sup>3</sup> and LIU Shanjun<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505008]]></guid><cfi:id>151</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Fine camera coverage calculation method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Camera coverage is an important basis of camera network initial configuration, optimal deployment and so on. Its precision and efficiency are the critical influences on the results of coverage analysis, which are very important to the application of large area camera coverage analysis, but many methods do not consider them. A new method to efficiently estimate camera coverage was proposed. Firstly, the geographic space was dispersed into grids. Secondly, the statuses of the four corners of each grid were computed. If the corner was covered by the camera, the status was denoted by using 1 or 0. So the status of the gird can be presented by the code which is either  0 or 1. Consequently there are 16 statuses to represent the status of a grid. Finally, if the code of the grid was not (0000) or (1111), the gird would be divided into four isometrical sub-girds until the subgirds were small enough or their codes were (0000) or (1111). According to the levels and statues of all grids, the whole camera coverage was estimated. Experimental results show that the proposed method can obtain more precise camera and can give consideration to both efficiency and accuracy.]]></description>
<pubDate>2015/11/9 16:21:57</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Ziran<sup>1</sup>, ZHANG Yanan<sup>2,3</sup>, LIU Xuejun<sup>2,3,4</sup> and WANG Meizhen<sup>2,3,4</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Ziran<sup>1</sup>, ZHANG Yanan<sup>2,3</sup>, LIU Xuejun<sup>2,3,4</sup> and WANG Meizhen<sup>2,3,4</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505009]]></guid><cfi:id>150</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Underdetermined direction of arrival estimation based on spatial time-frequency distributions]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the field of array signal processing, direction of arrival (DOA) estimation is a hotspot problem. Classical DOA estimation methods usually require the number of sensor should be larger than the source signals’ (which the so-called over-determined case is). However, what we encounter in practice is always the underdetermined case in which the number of source signal is larger than the sensors’. To solve the problem, a multiple signal classification (MUSIC) extension algorithm based on spatial time-frequency distribution was proposed to achieve the underdetermined DOA estimation by expanding the dimension of the spatial time-frequency distributions matrices. Compared with the existing time-frequency MUSIC, the proposed algorithm can be applied to both the over-determined and the underdetermined cases. The proposed algorithm also has advantages over the existing underdetermined DOA estimation methods for it guarantees the estimation precision, relaxes the requirements for source signal sparseness and lowers standards of the number of snapshots. Simulation results confirm the validity and high performance of the proposed algorithm.]]></description>
<pubDate>2015/11/9 16:21:58</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHU Liwei<sup>1,2</sup>, WANG Ya<sup>1</sup>, WANG Xiang<sup>2</sup> and HUANG Zhitao<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHU Liwei<sup>1,2</sup>, WANG Ya<sup>1</sup>, WANG Xiang<sup>2</sup> and HUANG Zhitao<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505023]]></guid><cfi:id>149</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Wideband spectrum fast sensing method based on improved multiple signal classification]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the problem of exorbitant sampling rate and sensing time too long in wideband sensing, a wideband spectrum sensing method using improved multiple signal classification (MUSIC) based on modulated wideband converter (MWC) was proposed. The MWC for sub-Nyquist sampling was used, the number of signals by minimum description length (MDL) criterion was estimated, and the signals’ location using improved MUSIC was estimated. In the improved MUSIC, an adjustment factor was given, which enhanced the MUSIC spectrum at the signal’ locations and reduced others, and the noise jam was restrained. An amount of calculations was reduced, because it neither needed to recover original wave, nor calculated PSDs in the whole process. The complexity of sensing method was small, so that it increased sensing efficiency. The results show a reliable detection even in low signal noise ratio.]]></description>
<pubDate>2015/11/9 16:21:58</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SUN Weichao, WANG Fenghua, HUANG Zhitao and WANG Xiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SUN Weichao, WANG Fenghua, HUANG Zhitao and WANG Xiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505024]]></guid><cfi:id>148</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Comparison and analysis of the imaging properties between circular SAR and linear SAR]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[With its intrinsic characteristics, circular synthetic aperture radar has lately become a particular interest to the radar community. The differences of imaging processing between the circular synthetic aperture radar and linear trajectory synthetic aperture radar were compared and analyzed. The detailed comparisons containing the size of the observed area, the properties of the point spread function, and the properties of echo spectrum were carried out. It was learnt that the difficulty of the imaging processing of single-pass circular synthetic aperture radar lies on its space dependence. To overcome this difficulty, the plane circular synthetic aperture radar and multi-base line circular synthetic aperture radar imaging models were analyzed. Simulation test was carried out and the corresponding results prove the proposed analysis is valid.]]></description>
<pubDate>2015/11/9 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[JIA Gaowei and CHANG Wenge]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIA Gaowei and CHANG Wenge</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505025]]></guid><cfi:id>147</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Semi-blind channel estimation for  OFDM/OQAM system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Interference approximate method (IAM) for orthogonal frequency division multiplexing / offset quadrature amplitude modulation (OFDM/OQAM) channel estimation needs the value of preamble at the background of  un-cooperative communications. Motivated by this consideration, an OQAM characteristic based-IAM (OCB-IAM) algorithm, which used IAM preamble framework and OQAM symbols’ real finite-alphabet characteristics, was introduced. OCB-IAM algorithm estimated the amplitude and phase of channel fading coefficients separately, and just needed preamble position, which was a kind of semi-blind channel estimators. OCB-IAM algorithm converted white Gaussian noise into single tone interference based on the secondorder statistics of received symbols. Then it could be proved that OCB-IAM algorithm has a better performance than IAM algorithm in medium and low SNR regime. Numerical results show the validity of theoretical analysis and the reliability of OCB-IAM algorithm.]]></description>
<pubDate>2015/11/9 16:21:58</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Xiaotian<sup>1,2</sup>, LEI Jing<sup>2</sup>, LIU Wei<sup>2</sup>, CAO Wei<sup>2</sup> and LI Yanbin<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Xiaotian<sup>1,2</sup>, LEI Jing<sup>2</sup>, LIU Wei<sup>2</sup>, CAO Wei<sup>2</sup> and LI Yanbin<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505026]]></guid><cfi:id>146</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A quick location method for BDS receiver based on coarse positioning by GEO constellation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201504013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Without knowing the approximate position of the receiver, the millisecond recovery algorithm of traditional global navigation satellite system signal-radiation existed problem of increasing computation, but unable to be applied. A fast positioning method for BDS receiver was proposed according to the high navigation  data rate of GEO(Geosynchronous Earth Orbit) satellites in BeiDou Navigation Satellite System. Firstly, an approximate position was got by coarse positioning using GEO constellation. Then the signal transmission time recovery of MEO/IGSO satellite was made according to the approximate position. Finally, all the visible satellites were used for precise positioning. Using iGMAS stations observation pseudorange to verify the proposed algorithm. The stations in China can 100% got full-pseudorange and obtained fast positioning. By using BDS broadcast ephemeris data, a simulation environment was built. The white noise with 6 meters standard deviation is added to satellites pseudorang. And the cut-off angle of elevation is 0°. The success rate of the quick location method is bigger than 98.68%. And about 80% of Chinese surrounding area can 100% guarantee  a complete satellite signal emission time restoration and obtain an accurate position.]]></description>
<pubDate>2015/9/1 15:03:06</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[JING Shourang, LI Baiyu, LIU Wenxiang and SUN Guangfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JING Shourang, LI Baiyu, LIU Wenxiang and SUN Guangfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201504013]]></guid><cfi:id>145</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of the influence of CNR estimation for GNSS receiver based on 2nd order step threat model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201504014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[CNR（Carrier-to-Noise Ratio）, an important indicator to evaluate the navigation signal quality, which directly affected the global navigation satellite system receiver performances of signal acquisition, carrier tracking, and data demodulation. Based on the distortion model of ICAO 2OS(International Civil Aviation Organization 2nd Order Step), the analytical expressions between CNR estimation and the distortion parameters of ICAO 2OS threat model were induced by using both coherent early-late processing and non-coherent early-late processing. And the influence of distortion parameters on CNR estimation error was analyzed. Theoretical analysis and simulation results show that carrier-to-noise ratio only changes in the 10<sup>-2</sup> order of magnitude when the TMA(Threat Model A) parameter changes within the set range, and can reach about 0.1dBHz caused by the TMB(Threat Model B) parameters. When increasing the TMB oscillation frequency and decreasing the attenuation factor can increase the estimated CNR. Consequently the distortion parameters of ICAO 2OS threat model have a small influence on the CNR estimation loss. Therefore, using the output CNR of the global navigation satellite system receiver to monitor the navigation signal abnormality is not reliable.]]></description>
<pubDate>2015/9/1 15:03:07</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GUAN Gangqiang, PANG Jing, LIU Wenxiang and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUAN Gangqiang, PANG Jing, LIU Wenxiang and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201504014]]></guid><cfi:id>144</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design of fast adaptive polarization filters utilizing polarizing cluster center]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201504015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[According to the traditional adaptive polarization filter algorithms had problems of low convergence speed and the iterative factor being hard to choose, a fast adaptive polarization filter was designed by utilizing the estimation theory of polarizing cluster center. The interference signal in polarimetric radar reception could be cancelled accurately and adaptively pulse-by-pulse. The range-gated technique in-pulse was adopted to obtain the interference signal samples. The current polarization state of the interference signal was estimated rapidly by computing the polarizing cluster center directly. Based on the principal of minimum interference output power, the fast filter process could be carried out. Compared to the traditional polarization filter, it is faster in convergence and more stable to the performance of interference suppression. Rapidity and efficiency of the filter algorithm are validated by simulation results.]]></description>
<pubDate>2015/9/1 15:03:07</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[REN Bo<sup>1,2</sup>, LUO Xiaobing<sup>2</sup>, DENG Fanggang<sup>3</sup> and WANG Guoyu<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>REN Bo<sup>1,2</sup>, LUO Xiaobing<sup>2</sup>, DENG Fanggang<sup>3</sup> and WANG Guoyu<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201504015]]></guid><cfi:id>143</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Aperture optimizing and 3-dimensional target feature extraction of curvilinear SAR based on compress sensing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201504016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The compressed sensing theory was applied to curvilinear aperture optimizing and 3-dimentional target feature extraction of curvilinear synthetic aperture radar. First, the echo signal target sparse representation model was built. Based on the incoherence principle between sparse matrix and sampling matrix of the compressed sensing theory, a guideline of evaluation to curvilinear aperture optimizing was found. Moreover, the 3-dimentional target feature extraction was realized by employing the basis pursuit method. Simulation results prove the correctness of the aperture optimization strategies with the incoherence principle as well as the efficiency of the basis pursuit method in target feature extraction.]]></description>
<pubDate>2015/9/1 15:03:07</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HE Feng<sup>1</sup>, YANG Yang<sup>1,2</sup>, DONG Zhen<sup>1</sup> and LIANG Diannong<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HE Feng<sup>1</sup>, YANG Yang<sup>1,2</sup>, DONG Zhen<sup>1</sup> and LIANG Diannong<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201504016]]></guid><cfi:id>142</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modified patch-based locally optimal wiener forinterferometric phase filtering]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201504017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the interferometric phase filtering problem of synthetic aperture radar, a modified patch-based locally optimal wiener algorithm was proposed. The proposed algorithm was the linear minimum mean square error estimator under the Gaussian additive noise condition and jointly estimated the first moment and second moment of the image, namely, mean and covariance using nonlocal means which was the state-of-art technique. When applied to interferometric phase filtering, two modifications were proposed according to the spatial variation of the noise. First, mean value, instead of median value, was used in the estimation of the noise standard deviation. Second, the number of clusters was determined adaptively according to the ratio of the maximum value to the mean value of the noise standard deviation. Experimental results on both simulation and real data show that the modified patch-based locally optimal wiener is effective and is superior to the other three algorithms.]]></description>
<pubDate>2015/9/1 15:03:07</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Yang<sup>1</sup>, HUANG Haifeng<sup>1</sup>, DONG Zhen<sup>1</sup> and WU Manqing<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Yang<sup>1</sup>, HUANG Haifeng<sup>1</sup>, DONG Zhen<sup>1</sup> and WU Manqing<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201504017]]></guid><cfi:id>141</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design and performance analysis of half-band pulse shaping filter]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201504018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A pulse shaping filter at the transmitter was set up to reduce the modulation bandwidth and inhibit the out-of-band spurious, and made use of a matched filter at the receiver to obtain the maximum signal noise ratio.  A cascaded multistage half-band shaping filter was designed and the minimum phase and maximum phase decomposition method was used, which facilitated the filter available in the practical communication system. Simulation result indicates that distinguished from the raised cosine finite impulse response filter, the designed filter has many advantages: the pass-band with lower ups and downs, less cost on the hardware resource, and extra power gain at low SNR for different modulation.]]></description>
<pubDate>2015/9/1 15:03:07</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XI Zhipeng, ZHAI Haitao, FU Yongming and ZHU Jiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XI Zhipeng, ZHAI Haitao, FU Yongming and ZHU Jiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201504018]]></guid><cfi:id>140</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Symbol detection algorithm in non-Gaussian noise using Markov chain Monte Carlo method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201504019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Considering that the receiver was not only affected by the non-Gaussian noise but also affected by its internal and external environment of  Gaussian noise, a mixed model composed by non-Gaussian distribution plus Gaussian distribution was proposed. A blind detection algorithm based on Markov Chain Monte Carlo method was designed according to the properties of the mixed model. The blind detection algorithm could estimate the channel fading coefficient, parameters of noise model and could detect signal element. Detect signals based on Bayesian hierarchical model was using Gibbs sample and M-H sample for parameter updating. The algorithm has a high iterative efficiency and precision. Results show that the proposed blind detection algorithm performs as well as the optimal detection algorithm and has important realistic significance in super low-freguency signal reception.]]></description>
<pubDate>2015/9/1 15:03:07</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[FENG Shimin<sup>1</sup>, ZHOU Suihua<sup>1</sup> and YING Wenwei<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FENG Shimin<sup>1</sup>, ZHOU Suihua<sup>1</sup> and YING Wenwei<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201504019]]></guid><cfi:id>139</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[GNSS timing receiver toughen technique in complicated jamming environments]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503001]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The threat models and spoofing attack detection technology about navigation satellite timing receiver were summarized. Combined with the operating principle and characteristics of timing receiver, a general framework of timing receiver reinforcement technology was presented. On this basis, two interference detection methods of clock aided method and network aided method were proposed according to the analysis of development tendency of timing receiver reinforcement technology. The former took the advantage of multi satellite clock difference redundancy and the local clock characteristics, while the latter took the advantage of the GNSS timing receiver network with the characteristics of data communication and wide coverage. The interference detection results can be used to integrity assessment and guide the GNSS timing receiver working mode, thus improving the satellite timing reliability and integrity in complicated interference environment.]]></description>
<pubDate>2015/6/30 18:53:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHU Xiangwei, WU Yiwei, GONG Hang, LIU Wenxiang and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHU Xiangwei, WU Yiwei, GONG Hang, LIU Wenxiang and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503001]]></guid><cfi:id>138</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A two-stage anti-jamming algorithm for GNSS antenna array]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503002]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Interference and multipath were the two dominant factors that affect the guidance and positioning performance of GNSS (Global Navigation Satellite System). According to the problem of anti-interference, a two-stage anti-jamming algorithm was proposed for GNSS antenna array. In the first stage, the PI (power inversion) algorithm was applied to suppress the interference. Then, the SNR (Signal-to-Noise-Ratio) of GNSS signal was improved by dispreading processing, and the spatial signature vector was estimated. In the second stage, the estimated spatial signature vector was used to weight and sum the output signal of the first stage. The proposed algorithm could null the interference and steer beams in the direction of GNSS signals simultaneously. Simulation results show that the performance of the proposed algorithm is better than PI algorithm, and it is similar to MVDR (Minimum Variance Distortionless Response) algorithm. The proposed algorithm requires no array calibration and aided altitude measurement unit, which has less implementation cost than MVDR algorithm.]]></description>
<pubDate>2015/6/30 18:53:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Feiqiang, NIE Junwei, YONG Ling and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Feiqiang, NIE Junwei, YONG Ling and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503002]]></guid><cfi:id>137</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A two-stage anti-jamming and multipath mitigation method in GNSS receivers using antenna array]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Array processing is widely used to achieve anti-jamming and multipath mitigation in GNSS(Global Navigation Satillite System) receivers for its ability to provide spatial resolution. According to different influences of interference and multipath signals to the signal processing in GNSS receivers, a two-stage anti-jamming and multipath mitigation structure divided by the correlation integrator was proposed. In the first stage, before despreading the space-time covariance matrix was estimated and anti-jamming was realized by using the subspace projection technique with the assumption that the interference power was bigger than the sum of GNSS signal and noise. In the second stage, spatial smoothing was used for multipath decoherence, and then a beamformer based on GSC (Generalized Sidelobe Cancellation) method with householder transform was implemented for multipath mitigation. Theoretical analysis and simulation results show that the proposed method can effectively suppress the strong interference and can significantly reduce the multipath signal effects on code measurement of GNSS receiver.]]></description>
<pubDate>2015/6/30 18:53:56</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GUAN Gangqiang, YONG Ling, NIE Junwei and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUAN Gangqiang, YONG Ling, NIE Junwei and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503003]]></guid><cfi:id>136</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A GNSS space-time anti-jamming algorithm with low complexity block Toeplitz matrix inversion]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503004]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Sample covariance matrix inversion was a basic operation unit in the realization of space-time antijamming algorithm, and its computation load grew rapidly with the increasing number of time taps, which directly restricted the application of space-time anti-jamming technique in GNSS (Global Navigation Satellite System) receiver. Aiming at this problem, a space-time anti-jamming algorithm based on block Toeplitz inversion was adopted into antijamming processing. By improving the estimation method of the covariance matrix, the algorithm got a sample covariance matrix both in the form of block Toeplitz matrix and Hermite matrix, and then the fast block Toeplitz inversion algorithm was applied to reduce the inversion complexity of covariance matrix of K taps from O［K<sup>3</sup>］to O［K<sup>2</sup>］. Theoretical analysis and simulation results show that when comparing with the traditional algorithm under the condition of 4 antenna elements and 15 taps, the anti-jamming performance cost of the proposed algorithm is less than 1dB, and its computation load reduction is about 2/3 times of the traditional algorithm.]]></description>
<pubDate>2015/6/30 18:53:56</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Shunxiao, HUANG Yangbo, NIE Junwei and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Shunxiao, HUANG Yangbo, NIE Junwei and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503004]]></guid><cfi:id>135</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Numerically controlled oscillator phase truncation effect on performance of frequency domain anti-jamming]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503005]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Numerically controlled oscillator is usually adopted in current GNSS(Global Navigation Satellite System) frequency domain anti-jamming receiver. Constrained by hardware, numerically controlled oscillator phase truncation is needed. But, whether numerically controlled oscillator phase is truncated reasonably influences anti-jamming performance greatly. Aiming at the problem,  its effect on mixing and frequency domain anti-jamming was analyzed theoretically based on local oscillator spur caused by numerically controlled oscillator phase truncation. A theoretical computing module of numerically controlled oscillator look-up table width was brought forward. Thus, carrier noise loss approximated that of receiver with non-truncated phase numerically controlled oscillator. Simulations show that numerically controlled oscillator look-up table width computed by that module is no more than 10bit, when suppressing narrow band interference whose band is above 100kHz and jam-signal-ratio is below 80dBc. When adopting that width, carrier noise loss of receiver with numerically controlled oscillator phase truncation increases 0.6dB at most, compared to that of receiver with non-truncated numerically controlled oscillator phase.]]></description>
<pubDate>2015/6/30 18:53:56</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Jian, NIE Junwei, LI Baiyu and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Jian, NIE Junwei, LI Baiyu and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503005]]></guid><cfi:id>134</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A coarse-time GPS positioning algorithm with ambiguity search]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Because it is difficult to obtain the priori position for time-free positioning algorithm, the coarse-time GPS(Global Positioning System) positioning algorithm with ambiguity search was proposed. Four satellites, which are the most reasonable combinations based on minimum root mean square of residuals criterion, were selected for coarse positioning by iterating through all combinations of integer ambiguity. The full pseudoranges of all satellites were constructed based on the priori position. The position was estimated using time-free positioning algorithm. The performance of the proposed method was verified by using the observation data of 11 IGS(International GNSS Service) stations. This method can achieve coarse-time GPS positioning even if the priori position is unknown, and provides comparable positioning results as compared with the traditional precise-time positioning. ]]></description>
<pubDate>2015/6/30 18:53:56</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[JING Shourang, LIU Wenxiang, WU Peng and SUN Guangfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JING Shourang, LIU Wenxiang, WU Peng and SUN Guangfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503006]]></guid><cfi:id>133</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of multi-GNSS united lunar explorer orbit positioning]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Multi-GNSS(Global Navigation Satellite System) united positioning was simulated based on researches of high earth orbital positioning. On the weakest signal acquisition C/N<sub>0</sub> threshold, 15dBHz, feasibility of satellite beam main lobe and side lobe receiving was analyzed, and the dilution of precision values with different GNSS system united cases were also analyzed. Simulation results show that when the receiving signal’s C/N<sub>0</sub> of both main lobe and side lobe is larger than the threshold, 3 systems united or more can satisfy positioning. When the side lobe loss isn’t compensated, C/N<sub>0</sub> of receiving signal is weaker than threshold so that any case of multi-system united can’t realize positioning. Analysis of dilution of precision values shows that geometrical dilution of precision of single system and double systems united changes violently. Geometrical dilution of precision of 4 systems united decreases 16.93% than that of 3 systems united. On the condition of 3 systems united, the case of American GPS(Global Position System) united with Chinese BDS(BeiDou navigation satellite System) and European Galileo system(Galileo satellite navigation system) is best since its geometrical dilution of precision is smoother than others. Theory analysis and simulation results provide beneficial suggestions for researching of lunar explorer positioning and space borne GNSS multi-system receiver.]]></description>
<pubDate>2015/6/30 18:53:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Lei, HUANG Yangbo, LIU Wenxiang and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Lei, HUANG Yangbo, LIU Wenxiang and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503007]]></guid><cfi:id>132</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Triple-frequency carrier phase ambiguity resolution for BeiDou navigation satellite system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[BeiDou navigation satellite system transmits triple-frequency signals which are benefit for the fast and accurate fixation of carrier phase integer ambiguity. Traditional TCAR(Three Carrier Ambiguity Resolution) method based on geometry-free model finds the suitable combination coefficients of carrier phase and pseudo-range observations by using traversal integer search method, which makes the higher noise level and the lower success reliability. In the analysis of the error characteristics of the pseudo-range observations, the weighted combined noise level was defined and a new procedure within its constrains to select the optimal combination coefficients was introduced. With using Hatch filter to improve the real-time estimation accuracy of ionospheric delay, the integer ambiguity of three linearly independent combination coefficients was fixed successfully, thus the basic integer ambiguities were determined. Finally, the performances of the improved TCAR are showed both in short-baseline and long-baseline condition: compared with traditional TCAR method, the total noise level has decreased by 20% for extra-wide lane and wide lane; the fixation success rate of ambiguity has improved about 10%~18%; the success reliability of basic ambiguities has achieved 90% with 30 seconds epochs smoothing.]]></description>
<pubDate>2015/6/30 18:53:56</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Xing, LIU Wenxiang, CHEN Huaming and SUN Guangfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Xing, LIU Wenxiang, CHEN Huaming and SUN Guangfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503008]]></guid><cfi:id>131</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of finite word length effect on delay-locked loop discriminator in GNSS receiver]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Code phase discriminator is the important part of the delay-locked loop, so its performance affects the pseudo-code tracking precision of receiver directly. Aim at influence of the input signal’s finite word-length effect on the discriminator’s performance, a new method based on signal statistical character was proposed and the effect of input signal’s finiteword length of unified early minus late amplitude discriminator on output performance was analyzed. Analysis and simulation show that the influence of input signal’s finite word-length effect in the case of high SNR(Signal-to-Noise Ratio) is more obvious than in the case of low SNR. The loss of pseudo-code tracking precision caused by finite word length increases as the increasing of input signal’s SNR. The deviation of the code phase discriminator with up to 4 bits almost has not influence on the pseudo-code tracking accuracy. This conclusion can be used to guide the low power and miniaturization design of receiver.]]></description>
<pubDate>2015/6/30 18:53:56</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Xiaohui, LI Zhengrong and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Xiaohui, LI Zhengrong and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503009]]></guid><cfi:id>130</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Weak GNSS signal tracking algorithm based on variable dimension Kalman filter]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Doppler shift and signal power attenuation in the complex environment both can make deviation bigger or even lose lock. Because the conventional Kalman filter can’t meet the dual requirements of high dynamic and high sensitivity when tracking maneuvering targets, a new carrier tracking method based on variable dimension Kalman filter was presented. By introducing motor model and non-monitor model of the carrier tracking and through putting in a maneuvering detector to monitor target movements, the real-time and effective switching of carrier tracking model was realized, so the adaptive tracking of carrier in motor and non-monitor state was achieved and the error caused by the change of maneuverability was overcome. 〖JP3〗Theoretical analysis and simulation results show that: comparing with the tracking algorithm based on standard Kalman filter, the phase tracking error of this algorithm is reduced by about 37.5% and the frequency tracking error is reduced by about 77% in weak carriertonoise ratio as low as 30dBHz environment.]]></description>
<pubDate>2015/6/30 18:53:56</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YU Xiaoyou<sup>1</sup>, GAO Tingting<sup>1</sup>, SUN Guangfu<sup>2</sup>, TANG Xiaomei<sup>2</sup> and NI Shaojie<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YU Xiaoyou<sup>1</sup>, GAO Tingting<sup>1</sup>, SUN Guangfu<sup>2</sup>, TANG Xiaomei<sup>2</sup> and NI Shaojie<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503010]]></guid><cfi:id>129</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of code tracking error in the presenceof partial-band interference]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The nonideal random property of the pseudo code should be taken into account to analyze the code tracking error accurately in the present of partial-band interference. A precise power spectrum model of the code was introduced, and the tracking errors obtained by simplified spectrum and precise spectrum were compared for different interference bandwidths. The REC(Relative Error Coefficient) was defined to quantitatively describe the effect of nonideal random property on the tracking error. If the interference bandwidth is larger, the REC will be smaller, and the effect of nonideal random property on the tracking error will be smaller, then the analysis results based on simplified spectrum and precise spectrum will tend to agree. When the REC is smaller than 0.2, the minimum interference bandwidths are presented for GPS L1 C/A codes. The bandwidths are the bounds of the application scope of the analysis based on simplified spectrum. Research results indicate that: if the interference bandwidth is larger than three hundred times of the frequency of the code period, the change of the code tracking error induced by the nonideal random property can be neglected. Conversely, the analysis based on precise spectrum will be necessary in the study of code tracking precision.]]></description>
<pubDate>2015/6/30 18:53:57</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[QU Zhi, YANG Jun and YANG Jianwei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>QU Zhi, YANG Jun and YANG Jianwei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503027]]></guid><cfi:id>128</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Channel-assisted interference mitigation method for radio astronomy by parametric estimation and subtraction]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201502011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The single channel method of anti-navigation frequency interference mainly utilizes the prior knowledge of the interference in observed data received by the large antenna for interference mitigation, the performance of the interference mitigation is weakened in the case of the relatively lower interference-to-noise ratio in the observed data. A channel-assisted interference mitigation method for radio astronomy by parametric estimation and subtraction is proposed. To achieve the purpose of eliminating the interference signal, the proposed method utilizes the observational data received by auxiliary antenna having a higher interference-to-noise ratio to establish the estimation model of interference parameters, at the same time by constructing the difference parameters estimation model of the main and auxiliary channel to correct the estimation model. Simulation results indicate that, compared with the single channel method, the proposed method is more broadly applicable to eliminate the interference in the lower interference-to-noise ratio conditions for radio astronomy.]]></description>
<pubDate>2015/5/16 9:33:24</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Zhuang<sup>1</sup>, MIAO Keke<sup>1</sup>, CHENG Zhu<sup>2</sup> and HUANG Da<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Zhuang<sup>1</sup>, MIAO Keke<sup>1</sup>, CHENG Zhu<sup>2</sup> and HUANG Da<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201502011]]></guid><cfi:id>127</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Multi-carrier chaotic shift keying chaotic communications under MIMO multipath fading channels]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201502012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To improve the frequency efficiency and the transmission performance of differential chaos shift keying under wireless fading channel, a multi-carrier chaotic shift keying communication scheme is proposed. In each block size of M OFDM symbols, one pilot OFDM symbol inserted time-spaced in all-frequency is used to transmit the reference chaotic signal and the other M-1 OFDM symbols is used to transmit the informationbearing signals, which spread by the reference chaotic signal. At the receiver, a differential detector is constructed and the information bits from the correlations between the pilot OFDM symbol and the other M-1 OFDM symbols in each block size of M are recovered. A multi-carrier chaotic shift keying transceiver under MIMO multipath fading channels with no channel state information is presented, in which a distinct chaotic sequence at each transmit antenna is used to spread the same data symbol and the detection statistics at each receive antenna are combined with equal gain for symbol detection. Both performance analysis and computer simulations show that multi-carrier chaotic shift keying outperforms differential chaos shift keying in additive white Gaussian noise channels with high bandwidth efficiency for the block size of M>2 and that multicarrier chaotic shift keying achieves both spatial diversity gain and frequent diversity gain under MIMO multipath fading channels.]]></description>
<pubDate>2015/5/16 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Shilian<sup>1</sup>, HU Dengpeng<sup>2</sup>, ZHANG Zhili<sup>1</sup> and LU Shujun<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Shilian<sup>1</sup>, HU Dengpeng<sup>2</sup>, ZHANG Zhili<sup>1</sup> and LU Shujun<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201502012]]></guid><cfi:id>126</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Method of voltage controlled oscillator frequency nonlinearity 
estimation and correction based on contrast optimization]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201502014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to accurately estimate and correct the frequency nonlinearity of voltage controlled oscillator, a novel approach based on contrast optimization of range profiles is proposed, which will perform nonlinearity estimation and correction adaptively. A temperature-varying tuning model is established in the proposed method, the nonlinearity is obtained with a given temperature by using this model. The nonlinearity is removed from the beat signal, and the range profiles of targets are derived by pulse compression. According to the contrast of range profile, the real temperature is iteratively estimated. The contrast of range profile will converge toward the maximum, so an optimal estimation of temperature, which is nonlinearity, is achieved. Simulation and experimental results show that the proposed approach with consideration on environmental temperature variation can estimate and correct the nonlinearity without any additional hardware circuit. Compared with the conventional approaches, this method can not only accurately estimate and track the frequency nonlinearity of voltage controlled oscillator in realtime, but also has low hardware complexity and computing cost, which is the significant to solve the problem of voltage controlled oscillator frequency drift.]]></description>
<pubDate>2015/5/16 9:33:24</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Hua, SONG Qian and ZHAOU Zhimin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Hua, SONG Qian and ZHAOU Zhimin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201502014]]></guid><cfi:id>125</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Electric field induced by magnetic hull of moving ship]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201502017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to study the electric field induced by magnetic hull of moving ship, a mathematical model was proposed based on Coulomb and Biot-Savart laws. The correctness of this model was verified by the experimental measurements. The model has the characteristics of wide applicability and high computational precision, on the basis of which, the induced electric field distribution of moving ship was proposed. The simulation calculation was performed using the magnetic field data of a real ship.The result indicates that the induced electric field reaches 1 mV/m around the ship, and it could be detectable.]]></description>
<pubDate>2015/5/16 9:33:24</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Jiawei<sup>1</sup>, XIONG Lu<sup>2</sup> and GONG Shenguang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Jiawei<sup>1</sup>, XIONG Lu<sup>2</sup> and GONG Shenguang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201502017]]></guid><cfi:id>124</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Carrier joint tracking algorithm for antenna array in GNSS]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201502019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Carrier phase difference measurements for the same satellite navigation signal at each antenna array elements can be used to solve its direction of arrival (DOA). However, traditional tracking algorithms can only adopt separate tracking loops for each separate antenna element when moderate interference is present; these algorithms cannot obtain precise measurements and frequently become lose of lock. Aim to solve these problems, a joint carrier tracking algorithm which decomposed each element′s carrier phase to the common average part and the low dynamic residual part was proposed. For the average carrier phase, as it is commonly shared by each array element, its tracking accuracy can be improved by combining all the observation values of the whole array elements. For the residual carrier phase, its tracking accuracy can be improved by reducing the loop noise bandwidth. Theoretical analysis and numerical simulation show that the algorithm can significantly improve the measurement accuracy of carrier phase difference between elements needed by DOA estimation and tracking sensitivity. The tracking sensitivity of a 4 element antenna array with typical application conditions improves 4dB and the carrier phase difference measurement accuracy of it increases 3 times under the same carrier noise ratio.]]></description>
<pubDate>2015/5/16 9:33:24</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Shunxiao, HUANG Yangbo, LIU Yingxiang and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Shunxiao, HUANG Yangbo, LIU Yingxiang and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201502019]]></guid><cfi:id>123</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Range-spread target detection in KK-distributed clutter]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201501020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the range-spread target detection problem in KK-distributed heavy-tailed radar clutter, the KK-distributed radar clutter was taken as a spherically invariant random vector. The Neyman-Pearson optimal integrator for the range-spread target detection with known target amplitude was derived firstly. Then by replacing the ideal target amplitude with the maximum likelihood estimates, the detector model in generalized likelihood ratio test (GLRT) was obtained. Both of the detectors are dependent on the modified Bessel function of the second kind, which makes the detectors computationally complicated, so a suboptimal generalized likelihood ratio detector based on order statistics (OS-GLRT) was proposed. The OS-GLRT takes some range unit echoes with largest amplitude in detection window as target echoes. The performance assessment conducted by Monte Carlo simulation validates that: the optimal integrator and GLRT have better performance, however, they are hard to applied, and the OS-GLRT is a more practical detector.]]></description>
<pubDate>2015/3/19 11:35:44</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GAO Yanzhao<sup>1，2</sup>,ZHAN Ronghui<sup>2</sup> and WAN Jianwei<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GAO Yanzhao<sup>1，2</sup>,ZHAN Ronghui<sup>2</sup> and WAN Jianwei<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201501020]]></guid><cfi:id>122</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Double-null monopulse low-angle tracking algorithm 
with array radars]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201501022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[According to array radar system, low-angle tracking problem was investigated from the perspective of revised mono-pulse. Firstly, based on the array signal model under multi-path conditions, the double-null mono-pulse algorithm was deduced by using the principle of Maximal Likelihood (ML) estimation. The revised sum-difference patterns were designed by digital beamforming (DBF). Simulation result shows the relation of double-null mono-pulse performance, SNR, target elevation, and complex reflection coefficient. Finally, measured data is used for validation. Result shows that the root of mean square error (RMSE) is still less than 1/40 of the beamwidth when the target elevation is less than 1/4 of the beamwidth. Therefore, the double-null mono-pulse algorithm is effective for low-angle tracking problem.]]></description>
<pubDate>2015/3/19 11:35:44</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Zhenhai,XIONG Ziyuan,SONG Dan and XIAO Shunping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Zhenhai,XIONG Ziyuan,SONG Dan and XIAO Shunping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201501022]]></guid><cfi:id>121</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A deployment decision-making algorithm for software defined radio 
waveforms with throughput and latency constraints]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201501023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aimed at the problem that current deployment decision-making algorithms for software defined radio waveforms with throughput and latency constraints were paid little attention to the memory overhead, a more general system model for waveform deployment decision-making was proposed, by which the processing, memory and communication bandwidth were all incorporated in the process of waveform deployment decision-making. Besides, a dynamic programming-based algorithm for waveform deployment decision-making was devised to minimize the sum of various kinds of computing resource occupancies of waveform. Simulation results show that the memory has an important effect on the waveform deployment decision-making, while comparing with the algorithm that does not consider the memory overhead, the average maximum waveform number and the average processing resource usage supported by platform are both decreased about 40%.]]></description>
<pubDate>2015/3/19 11:35:44</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Shangfeng<sup>1</sup>,TANG Qi<sup>1</sup>,WEI Jibo<sup>1，2</sup> and LI Wei<sup>1，3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Shangfeng<sup>1</sup>,TANG Qi<sup>1</sup>,WEI Jibo<sup>1，2</sup> and LI Wei<sup>1，3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201501023]]></guid><cfi:id>120</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Radar emitter identification in time-variation channel based 
on local correlation test]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201501025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Emitter identification is brought into research hotspot in the field of electronic warfare. To solve the problem of radar emitter identification in time-variation channel, a local correlation testing based on Likelihood Test was proposed. The method used the radar waveforms with large diversity parts to form reference waveform, identified signals by building a hypothesis model, and adjusted the variability of reference waveforms by a scale coefficient. Simulation result shows that the recognition performance and the multipath interference performance of the method are better than likelihood-ratio test with the incremental variability of the reference signal.]]></description>
<pubDate>2015/3/19 11:35:44</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Dan,SUN Zhenjiang,LIU Zheng and JIANG Wenli]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Dan,SUN Zhenjiang,LIU Zheng and JIANG Wenli</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201501025]]></guid><cfi:id>119</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Simulating and analyzing the impact of ionospheric scintillation for BeiDou navigation signals]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Due to its accidental, sudden and regional characteristics, the simulation of GNSS navigation signals under ionospheric scintillation is difficult to be implemented accurately. The ionospheric scintillation time-series generation method based on Gamma distribution and zero-mean Gaussian distribution was proposed. With the NSS8000, a multi-system navigation signal simulator developed by our department, the hardware architecture of BeiDou navigation signal simulation under ionospheric scintillation was given. Then based on this, by intermediate frequency signal sampling and software receiver processing, the impact of ionospheric scintillation on BeiDou receiver tracking loops was analyzed. The results indicate that the code tracking error can reach 0.05 chips when the phase scintillation index is 0 and amplitude scintillation index is 0.9, while the carrier tracking error can reach 15 degrees when the amplitude scintillation index is 0 and the phase scintillation index is only 0.5, which the carrier tracking loops is almost loss of lock.]]></description>
<pubDate>2016/12/31 18:39:27</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SUN Pengyue, HUANG Yangbo, TANG Xiaomei and SUN Guangfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SUN Pengyue, HUANG Yangbo, TANG Xiaomei and SUN Guangfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606018]]></guid><cfi:id>118</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Extended point feature histograms for 3D point cloud representation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Local feature extraction plays an important role in related point cloud applications. Therefore, an EPFH (extended point feature histograms) descriptor for the local feature representation of 3D point cloud was proposed. Each point pair was represented by several invariant pairwise point attributes. Then, a local reference frame was defined for a keypoint and the neighboring points of the keypoint were transformed into the local reference frame. These pairwise points attributing between the neighboring points and the keypoint were accumulated into several subfeatures in a set of subspaces. These subfeatures were finally concatenated and compressed into an overall feature descriptor. The EPFH descriptor was tested by a popular publicly available Bologna dataset and was compared with several existing methods. Experimental results show that the proposed EPFH method outperforms several existing methods under different levels of noise and point cloud resolutions.]]></description>
<pubDate>2016/12/31 18:39:27</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHUANG Zhiyun, ZHANG Jun and SUN Guangfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHUANG Zhiyun, ZHANG Jun and SUN Guangfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606020]]></guid><cfi:id>117</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Maximum likelihood angle estimation of two targets with array radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[As the targets in the same beam are close to each other, it is difficult to resolve them via traditional techniques. Furthermore， it also brings difficulty in detecting and tracking. The problem of resoling two targets in the same beam was studied with array radar. An echo model of two unresolved targets with array radar was established. An improved angle estimation method was proposed based on the maximum likelihood estimation principle. In consideration of the convergence speed and estimation accuracy, the LevenbergMarquardt method was applied to obtain the maximum likelihood estimation of target direction. The simulation results prove that the method performs well in several aspects, including smaller estimation error and computational cost.]]></description>
<pubDate>2016/12/31 18:39:27</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Jiani<sup>1</sup>, CHEN Yongguang<sup>2</sup>, XU Zhenhai<sup>1</sup>, XIONG Ziyuan<sup>1</sup> and WANG Xuesong<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Jiani<sup>1</sup>, CHEN Yongguang<sup>2</sup>, XU Zhenhai<sup>1</sup>, XIONG Ziyuan<sup>1</sup> and WANG Xuesong<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606021]]></guid><cfi:id>116</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Radar emitter signal recognition  based on deep  restricted Boltzmann machine]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To deal with the problem of radar emitter recognition caused by parameter complexity and agility of muti-function radars in electronic intelligence reconnaissance field, a new recognition model based on deep restricted Boltzmann machine was proposed. The model was composed of multiple restricted Boltzmann machine. A bottom-up hierarchical unsupervised learning was used to obtain the initial parameters, and then the traditional back propagation algorithm was conducted to fine-tune the network parameters, and the Softmax was used to classify the results at last. Simulation and comparison experiment shows that the proposed method has the ability of extracting the parameter features and recognizing the radar emitters, and it has strong robustness as well as high recognition rate.]]></description>
<pubDate>2016/12/31 18:39:27</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHOU Dongqing<sup>1</sup>, WANG Yubing<sup>1</sup>, WANG Xing<sup>1</sup>, CHENG Xiangdong<sup>2</sup> and XIAO Jiyang<sup>3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Dongqing<sup>1</sup>, WANG Yubing<sup>1</sup>, WANG Xing<sup>1</sup>, CHENG Xiangdong<sup>2</sup> and XIAO Jiyang<sup>3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606022]]></guid><cfi:id>115</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Ballistic target detection in infrared multispectral imagery]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[There are two important characteristics for missile plume in infrared multispectral imagery: one is the gray-scale difference caused by strong infrared radiance; and the other one is the unique spectral signature feature. However, the classical single-band detection technology only uses the first characteristic, and the multispectral detection technology which has been developed in recent years only uses the second characteristic. In order to fully exploit the characteristics of missile plume, three detection algorithms were proposed by combining the single-band and multispectral detection technology. The advantages and disadvantages of the three algorithms were discussed in detail in the aspects of  detection performance, computational complexity and robustness. Experiments on synthetic infrared multispectral imagery demonstrate a better performance of the combined algorithms when compared with single-band or multispectral detection algorithm.]]></description>
<pubDate>2016/12/31 18:39:27</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HUANG Shucai, LING Qiang, WEI Daozhi and WU Xiao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HUANG Shucai, LING Qiang, WEI Daozhi and WU Xiao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606023]]></guid><cfi:id>114</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Precise time measurement based on orthogonal frequency and code division multiplexing in fading channel]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A novel communication system based on orthogonal frequency and code division multiplexing was proposed for precise time measurement in the fading channel, and a novel iterative algorithm was proposed to improve the performance caused by the fading channel and phase noise without reducing the maximum unambiguous time. In the scheme, the coefficients of fading channel and the phase noise were jointly estimated with the time delay. It is shown both by theory and computer simulations that the proposed scheme can effectively mitigate the time estimation error caused by fading channel and phase noise.]]></description>
<pubDate>2016/12/31 18:39:27</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GAO Kai, ZHU Jiang, ZOU Jianbin, ZHANG Wei and ZHOU Ziwei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GAO Kai, ZHU Jiang, ZOU Jianbin, ZHANG Wei and ZHOU Ziwei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606024]]></guid><cfi:id>113</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Adaptive  pulse compression algorithm of steppedfrequency radar side-lobe suppression]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[IFFT(inverse fast Fourier transform) technique is usually used in high resolution radar imaging with stepped frequency signal. However, due to the high side-lobes introduced by IFFT, the weak scatters or small targets may be covered by the range side-lobes of the strong scatters, which limit its application in the strong clutter environment. In order to suppress the high range sidelobes, APC (adaptive pulse compression) algorithm based on MMSE (minimum mean square error) has been proposed in recent years. Based on the model of APC algorithm, the APC algorithm of stepped frequency signal for stationary and moving target was detruded. Simulation results show that the APC algorithm has a better side-lobe suppression effect when compared with the IFFT method and the windowed processing, and it can detect weak scatter or small target in the neighborhood of the strong one better.]]></description>
<pubDate>2016/12/31 18:39:28</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LU Zaiqi, ZENG Xianggui and XIA Yang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Zaiqi, ZENG Xianggui and XIA Yang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606025]]></guid><cfi:id>112</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Cooperative localization of low-frequency near-field target using multi-vector-hydrophones]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606029]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the problem that the underwater small platform cannot locate the low-frequency near-field target, a cooperative localization algorithm using multiple vector hydrophones was proposed. The hydrophones were regarded as different observation points, and then the azimuth angles of target connected to different observation points were estimated respectively on the basis of the array manifold characteristics of hydrophones. According to these azimuths, the location of near-field target was realized by using the orthogonal vector method. This algorithm avoids the multi-dimensional search process and reduces the calculation. The simulation results show that this algorithm can locate the nearfield target accurately and improve the location accuracy effectively.]]></description>
<pubDate>2016/12/31 18:39:28</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Chaoran<sup>1</sup>, CHENG Jinfang<sup>2</sup> and XIAO Dawei<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Chaoran<sup>1</sup>, CHENG Jinfang<sup>2</sup> and XIAO Dawei<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606029]]></guid><cfi:id>111</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Unbiased multipath mitigation technique for GPS timemultiplex binary offset carrier signal]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201605023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[BOC（binary offset carrier）modulation will be widely used in satellite navigation systems. The data and pilot channel of GPS L1C signal was modulated with the BOC (1, 1) and the TMBOC (time-multiplex binary offset carrier) modulation. The discrimination curve of TMBOC modulated signal was characterized with bias when using CCRW (code correlation reference wave) technique. In order to eliminate the tracking bias, an unbiased multipath mitigation technique was proposed. The novel technique generated two categories of local wave for the BOC (1, 1) and BOC (6,1) modulated component respectively, and its discrimination output was zero when there was no code phase bias. The technique can obtain unbiased tracking and a better accuracy because of the better utilization of BOC (6, 1) signal component.]]></description>
<pubDate>2016/11/8 9:36:53</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[NI Shaojie, LIU Yingxiang, XIAO Zhibin and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>NI Shaojie, LIU Yingxiang, XIAO Zhibin and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201605023]]></guid><cfi:id>110</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Impact of signal bandwidth on code tracking accuracy of code correlation reference waveform algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201605024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The analysis of code tracking accuracy for CCRW（code correlation reference waveform）from the literature is mainly on the assumption for the infinite channel bandwidth and the simulation that how the gate width parameters affect the code tracking accuracy. Therefore, the analytical expression of code tracking accuracy was derived. The effect of signal channel bandwidth on CCRW tracking accuracy was analyzed and verified. The analysis shows that the code tracking accuracy with unlimited channel bandwidth can be improved by reducing the width of the gate wave, but there is an optimal value of the gate width in the bandlimited condition. The research results can be used to guide CCRW algorithm design for GNSS receivers．]]></description>
<pubDate>2016/11/8 9:36:54</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[PANG Jing, NI Shaojie, LIU Yingxiang and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PANG Jing, NI Shaojie, LIU Yingxiang and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201605024]]></guid><cfi:id>109</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Facet-based rapid electromagnetic modeling and SAR imaging for composite ship-sea scene]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201604014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the high frequency of microwave, sea surface or ship target usually has the characteristics of electrically large size and very sophisticated structure, which imposes a huge computational burden for the electromagnetic modeling of the composite ship-sea scene. To simplify the calculation, based on the facet-model theory, the graphical electromagnetic computing method and the four path model, a hybrid method for the electromagnetic scattering computation of electrically-large composite ship-sea scene was presented. Under the precondition of guarantee calculation precision, the efficiency was improved obviously. The radar cross section of time-varying sea surfaces and ship target for different radar parameters were simulated and analyzed. The results show good agreement with the experimental data and the accurate numerical results, which demonstrates the correctness of the method. Application of the model to synthetic aperture radar imaging of marine scenes was  developed. Simulation results demonstrate the effectiveness of the proposed method.]]></description>
<pubDate>2016/9/13 11:24:53</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Ning, ZHANG Min, WANG Xin and NIE Ding]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Ning, ZHANG Min, WANG Xin and NIE Ding</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201604014]]></guid><cfi:id>108</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of carry phase difference detection for satellite navigation receivers anti-spoofing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201604016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For the fact that the spoofer has no way to simulate the space distribution characteristic of the authentic GNSS（global navigation satellite system）  signals, a detection technique based on carry phase difference was proposed. All errors of the detection were analyzed, and the multiple hypotheses testing  the spoofing detection were built. Through theoretical analysis and simulation tests, the proposed spoofing detection method is verified. Results show that the longer the baseline of the array is, the smaller angle of incidence is, which leads to a better spoofing detection performance of the proposed method.]]></description>
<pubDate>2016/9/13 11:24:53</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[HUANG Long, YONG Ling, XU Bo and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HUANG Long, YONG Ling, XU Bo and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201604016]]></guid><cfi:id>107</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Experimental test system design for thermal wakes of submerged vehicle based on scale model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201604017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[According to similarity principles, an infrared imaging experimental test system based on scale model was set up, such work conditions as scale model based vehicle volume, submerged depth, movement, wake discharging, and etc, were designed so that the static and dynamic thermal wake detection tests of scaled vehicle were realized. The detectability of submerged vehicle thermal wakes on one side was determined, and the influencing factors at thermal wakes detection and changing rules of the wakes were found, which lays a foundation for future work. Scale model experimental tests show that the thermal wakes from submerged vehicle can be effectively detected out via the substantial changes of regional gray mean and gray mean variation.]]></description>
<pubDate>2016/9/13 11:24:53</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YANG Weiping, ZHANG Zhilong and LI Jicheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Weiping, ZHANG Zhilong and LI Jicheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201604017]]></guid><cfi:id>106</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Timing synchronization based on early/late loop with multi-h continuous phase modulation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201604018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Timing synchronization with the early/late loop scheme based on sequence detection was proposed for multi-h continuous phase modulation. The timing error detector was implemented by the survival metrics of Viterbi algorithm. The so-called S-curve and estimation variance were used for optimizing the acquisition range and tracking performance as well as eliminating false lock points of the loop. Using the PAM (pulse amplitude modulation) representation of multi-h CPM(continuous phase modulation), the proposed timing error detector is simplified. Simulation results show that the estimation range is as large as ±0.5 symbol period, and estimation precision is close to the modified Cramer-Rao bound at medium and low SNR(signal noise ratio), and it also has better estimation performance at high SNR. BER (bit error rate) with simplified schemes are derived. It is demonstrated that when the number of Viterbi metrics is reduced to 1/8 of the maximum likelihood sequence detection, the performance loss is only less than 0.5 dB for Mary or partial response of multi-h CPM.]]></description>
<pubDate>2016/9/13 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XIE Shunqin<sup>1</sup>, XIE Tao<sup>2</sup>, ZHONG Sheng<sup>1</sup>, YANG Chun<sup>1</sup>, WANG Shilian<sup>2</sup> and ZHANG Jian<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIE Shunqin<sup>1</sup>, XIE Tao<sup>2</sup>, ZHONG Sheng<sup>1</sup>, YANG Chun<sup>1</sup>, WANG Shilian<sup>2</sup> and ZHANG Jian<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201604018]]></guid><cfi:id>105</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Accuracy assessment of BDS signal-in-space range errors in 2013—2015]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603001]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on precise ephemeris provided by Wuhan University, BDS(BeiDou navigation satellite system) broadcast ephemeris errors were computed over the past three years from January 2013 to September 2015. The orbit errors, clock errors, and SISREs (signal-in-space user range errors) are presented and analyzed in different time periods for assessment. Results show that the radial accuracy of overall BDS  satellites is less than 0.7 m and the normal accuracy of that is less than 1.4 m. Additionally, no obviously long term trends are found in both radial and normal errors. In term of along-track errors, the accuracies of IGSO(inclined geo synchronous orbit) and MEO(medium earth orbit) satellites are all less than 2.1 m and the along-track accuracy of GEO(geosynchronous earth orbit) is improved from 14 m to 8 m. The clock accuracies of GEO, IGSO and MEO are 6.3 ns, 4.7 ns and 4.3 ns respectively, and the clock accuracies of all satellites are more than 6 ns. The SISREs of all satellites are generally less than 2 m, and the SISREs of MEO satellites are relatively stable over the past 3 years. However, IGSO SISREs and GEO SISREs have some fluctuations in certain level.]]></description>
<pubDate>2016/7/7 11:13:52</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Wanke<sup>1,2</sup>, REN Jie<sup>1</sup>, ZENG Qi任杰<sup>1</sup>, WU Yun<sup>1</sup> and LOU Yidong<sup>3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Wanke<sup>1,2</sup>, REN Jie<sup>1</sup>, ZENG Qi任杰<sup>1</sup>, WU Yun<sup>1</sup> and LOU Yidong<sup>3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603001]]></guid><cfi:id>104</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Detection and repair of cycle slips for undifferenced BDS triple-frequency observations]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The presence of the new frequency introduces more observations and degrees of freedom in data combination, which is beneficial for cycle-slip detection and repair. A novel real time cycle-slip detection and repair method based on undifferenced triple-frequency observations was proposed. This method employed two groups of geometry-free and ionosphere-free combinations of code and carrier phase observables, and constructed the third linearly independent detector for cycle-slip by eliminating the ionospheric delay variation between two consecutive epochs. The performance of the proposed method was validated with BeiDou triple-frequency observations with 30 s sampling interval. Results show that this method can effectively detect and correct the cycle slips on each frequency, even under high ionospheric activity condition. ]]></description>
<pubDate>2016/7/7 11:13:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Xing, LIU Wenxiang, LI Baiyu and SUN Guangfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Xing, LIU Wenxiang, LI Baiyu and SUN Guangfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603003]]></guid><cfi:id>103</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Adaptive extended Kalman filter carrier tracking algorithm for  BDS signals under ionosphere scintillation conditions]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603005]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Ionospheric scintillation is a rapid change in the phase and amplitude of navigation signals, resulting in degraded accuracy and robustness of signal tracking loops. Compared with the frequency tracking loop and delay tracking loop, carrier tracking loop is much weaker, and will lose lock much more continually in scintillation. Therefore, a carrier tracking algorithm for BeiDou signals scintillation mitigation based on adaptive EKF (extended Kalman filter) was proposed. The integration of in-phase and quadrature channels was used to estimate the phase lock indicator values which are the control parameter to adjust the measurement vector of EKF adaptively with different scintillation scenarios. Through the adaptive measurement vector, the accuracy and robustness of the tracking can be improved and the probability of filter divergence can be decreased. Experimental results prove the validity of the analysis and the proposed carrier tracking algorithm.]]></description>
<pubDate>2016/7/7 11:13:58</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SUN Pengyue, TANG Xiaomei, CHEN Huaming and SUN Guangfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SUN Pengyue, TANG Xiaomei, CHEN Huaming and SUN Guangfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603005]]></guid><cfi:id>102</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Unambiguous multipath mitigation algorithm with multi-region discriminator for high-order BOC signals]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The traditional multipath mitigation algorithms for high-order BOC (binary offset carrier) signals have a narrow effective convergence region, which is a weakness for stably tracking, therefore, a multi-region discriminator for multipath mitigation of high-order BOC signals was proposed. The optimized QStrobe discriminator was applied when code error was in the near zero region, which improved the multipath mitigation performance, while the QBOC discriminator was applied in the other regions which had an excellent convergence performance. The Kalman filter was utilized to estimate the tracking error with open-loop method for real-time switch of discriminator. Simulation Results of BOC(15, 2.5) and BOC(14, 2) signals show that the multi-region discriminator algorithm can eliminate the tracking ambiguity. In addition, compared with the traditional QStrobe algorithm, the 6 dB attenuated multipath error envelope area is improved by 51% and 57% respectively.]]></description>
<pubDate>2016/7/7 11:14:01</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[TIAN Feng<sup>1,2</sup>, TANG Xiaomei<sup>1</sup> and OU Gang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TIAN Feng<sup>1,2</sup>, TANG Xiaomei<sup>1</sup> and OU Gang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603007]]></guid><cfi:id>101</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A GNSS anti-spoofing technique based on dual-receiver]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The spoofing interference can mislead target receiver in resulting in wrong position and time, which is a serious threat to the security of GNSS applications. An anti-spoofing method using the pseudo-range single-differences of two receivers was proposed. Using the variance analysis technique, the optimal spoofing detection variable based on the pseudo-range single-differences was deduced and the statistical character of the detection variable was analyzed. After analyzing, the parameters such as the receiver noise, the receiver baseline, and the satellite number have a large influence on the detection performance; as the receiver noise and satellite number are uncertain, the detection performance can be improved by increasing the length of baseline. When the length of baseline is 10 meters, the simulation results illustrate that the spoofing detecting probability is up to 98% if the false alarm rate is 0.01.]]></description>
<pubDate>2016/7/7 11:14:02</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XIAO Ling, TANG Xiaomei, LI Baiyu and SUN Guangfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIAO Ling, TANG Xiaomei, LI Baiyu and SUN Guangfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603008]]></guid><cfi:id>100</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Performance analysis of anti-jamming algorithm in GNSS receiver utilizing subspace projection and beamforming]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Considering that the global navigation satellite system signal is buried in the strong interference and thermal noise, a novel anti-jamming scheme which utilizes subspace projection and beamforming method was proposed. The data vector received by antenna array was projected onto the noise subspace which is orthogonal to interference subspace to achieve interference suppression. When the local code was synchronized with the reference antenna jammer-free data, beamforming was performed according to the minimum mean square error criterion. Simulation results show that the proposed method can steer the main beam to the direction of global navigation satellite system signal wave with effective interference suppression, and the output signal-to-noise ratio can be significantly increased while the correlation peak curve and the carrier tracking performance are not corrupted.]]></description>
<pubDate>2016/7/7 11:14:04</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GUAN Gangqiang, NIE Junwei, HUANG Yangbo and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUAN Gangqiang, NIE Junwei, HUANG Yangbo and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603009]]></guid><cfi:id>99</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Distortion error evaluation indexes of binary offset carrier modulation signals]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The analytical evaluation indexes for three signal distortion errors of BOC(Binary Offset Carrier) signals were developed. Then the proposed evaluation indexes were used to evaluate the distortion errors of BOC(14,2) and MBOC(6,1,1/11) signals, which were the advised basis signals of BeiDou global satellite navigation system. The proposed distortion error evaluation indexes can be used to evaluate the distortion errors of modern global navigation satellite system signals, and it has directive significance to modern signal design and integrity monitoring.]]></description>
<pubDate>2016/7/7 11:14:05</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YU Xiaoyou<sup>1</sup>, YAO Lihong<sup>1</sup>, HUANG Yangbo<sup>2</sup>, ZHANG Yonghu<sup>2</sup> and SUN Guangfu<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YU Xiaoyou<sup>1</sup>, YAO Lihong<sup>1</sup>, HUANG Yangbo<sup>2</sup>, ZHANG Yonghu<sup>2</sup> and SUN Guangfu<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603010]]></guid><cfi:id>98</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Constellation recovery and modulation recognition for multiple quadrature amplitude modulation signals]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[An algorithm for modulation recognition of multiple quadrature amplitude modulation signals based on constellation recovery was proposed. Firstly, parameters of the carrier frequency and signal to noise ratio were estimated from its spectrum. According to the baud rate and the symbol timing, the baud rate sampling was finished. Then a non-data-aided carrier frequency offset estimation method was used to mitigate the effect of frequency offset and phase offset in constellation recovery. Finally, the modulation type was recognized by the average likelihood ratio test method. Simulation results demonstrate that the proposed algorithm has a better recognition performance when comparing with the amplitudebased maximum likelihood algorithm. ]]></description>
<pubDate>2016/7/7 11:14:21</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LU Shanshan<sup>1,2</sup>, WANG Wei<sup>1</sup> and WANG Guoyu<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Shanshan<sup>1,2</sup>, WANG Wei<sup>1</sup> and WANG Guoyu<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603022]]></guid><cfi:id>97</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modeling and analysis of multicarrier code division multiple access upon Tanner graph]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[MC-CDMA (multicarriercode division multiple access) is an important multiple access technique for mobile communications. In conventional MC-CDMA, construction of spreading sequences and multiuser detection are considered separately, which means that the transmitter and the receiver are not designed jointly. Inspired by LDPC (low density parity check) codes, the transceiver models of MC-CDMA based on graph theory were designed, and the low density Tanner graph was used to describe the relationship between spreading chips and data symbols. In addition, message passing algorithm, which was suitable for the Tanner graph, was utilized to perform iterative multiuser detection. Flooding and serial schedules for the message passing were deduced and analyzed. Simulation results show that the conventional MC-CDMA cannot perform well under the overloading conditions, while the proposed low density Tanner graph for MC-CDMA achieves satisfactory performance, which provides the useful reference for the design of next generation mobile networks.]]></description>
<pubDate>2016/7/7 11:14:26</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WEN Lei, LEI Jing, WEI Jibo and WANG Jianxin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WEN Lei, LEI Jing, WEI Jibo and WANG Jianxin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603025]]></guid><cfi:id>96</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Human behavior recognition using generative model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A novel method based on generative model was proposed for human behavior recognition. The behavior was represented by using a set of descriptors computed from key point trajectories, which included the orientationmagnitude descriptor, the trajectory shape descriptor and the appearance descriptor. In order to reduce feature dimensions, the agglomerative information bottleneck approach was used for vocabulary compression. The semi-supervised learning method for behavior recognition based on generative model was proposed to solve the problem of small sample in recognition, which made use of both the labeled and unlabeled samples. Compared with other state-of-the-art methods in both UCF sports database and YouTube database, results show that the proposed method has higher recognition accuracy.]]></description>
<pubDate>2016/5/6 16:32:20</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Jun<sup>1,2</sup>, XIA Limin<sup>2</sup> and XIA Shengping<sup>3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Jun<sup>1,2</sup>, XIA Limin<sup>2</sup> and XIA Shengping<sup>3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602012]]></guid><cfi:id>95</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Phase center evaluation method in adaptive GNSS antenna]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Beam forming processing of adaptive antenna introduces the change of antenna phase center. In order to solve this problem, an evaluation method of adaptive antenna phase center on the basis of available beam was proposed. The method achieved the purpose in three steps: setting the available beam threshold; obtaining phase pattern set in available beam areas when the direction of interference signal distributed uniformly; fitting the phase pattern set to get the average phase center variations of adaptive antenna by using least square method. The method was validated by simulation under four typical four-elements-arrays. The analysis of simulated results indicates that the proposed method can be used to evaluate the phase center characters of adaptive antenna conveniently. What’s more, in order to fulfill the performance of high precision for adaptive antenna array, a choice is to reduce the available beam threshold. The research can be used as a guideline for choice of distributions of antenna elements in high-precision GNSS.]]></description>
<pubDate>2016/5/6 16:32:21</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Lixun, PANG Jing, CHEN Huaming and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Lixun, PANG Jing, CHEN Huaming and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602015]]></guid><cfi:id>94</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Gaussian-sum based cubature Kalman filtering algorithm for source geolocation using dual geostationary satellites]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To tackle the inherent high nonlinearity of motion equation and observation equation of radiation source, a GS (Gaussian-sum) based 5CKF (5th-order cubature Kalman filter) tracking algorithm, referred to as GS-5CKF, was proposed. It consists of multiple parallel 5CKFs, which  were initialized through partitioning the candidate source positions determined by the time difference of arrival measurement at the beginning of the tracking process with respect to the source latitude. The linear combination of filter outputs was conducted to estimate the motion state of radiation source. A new nonlinearity measure was advocated, on the basis of which a filtering splitting and merging procedure was developed to further enhance the performance of GS-5CKF while keeping its computational complexity fixed. Simulation results show that: compared with the tracking algorithms using the single 5CKF and the GS-3CKF, the newly proposed GS-5CKF technique exhibits higher source geolocation accuracy.]]></description>
<pubDate>2016/5/6 16:32:21</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Xi<sup>1</sup>, YANG Le<sup>1,2</sup>, GUO Fucheng<sup>2</sup>, LIU Yang<sup>2</sup> and ZHANG Min<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Xi<sup>1</sup>, YANG Le<sup>1,2</sup>, GUO Fucheng<sup>2</sup>, LIU Yang<sup>2</sup> and ZHANG Min<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602017]]></guid><cfi:id>93</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Hop timing precise estimation for frequency-hopping signals based on improved orthogonal matching pursuit algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The hop timing estimates derived from existing methods are coarse and unreliable, therefore, a novel method for estimating hop timing for frequency-hopping signals precisely was proposed based on an improved orthogonal matching pursuit algorithm. The sparse representation model for hop timing estimation was established according to the principle of frequency-hopping signals. Then, the improved orthogonal matching pursuit algorithm was used to solute the model and get hop timing finally. The theoretical analysis and simulation results verified that the method is capable of obtaining precise hop timing, and is better than current methods.]]></description>
<pubDate>2016/5/6 16:32:21</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SHA Zhichao, SHENG Weidong, XU Zhan and LI Jun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHA Zhichao, SHENG Weidong, XU Zhan and LI Jun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602018]]></guid><cfi:id>92</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Power-weighted combining acquisition algorithm with  data and pilot signals]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The modulation with different power of data and pilot channels will be used in the next generation of global navigation satellite systems. However, the traditional acquisition algorithms are mostly designed with equal-weighted coefficient of data and pilot channels. When the power of data and pilot channels is not equal, the traditional algorithms are not suitable for optimizing the performance. A power-weighted combining acquisition algorithm, which uses the different weighted coefficients for data and pilot channels, was proposed. The Least-Square fitting method was used to optimize the coefficients. The detection and false-alarm probabilities were derived with characteristic function of decision variable. The simulations prove that the acquisition threshold of the algorithm is improved by 0.4 dB when the power ratio of data and pilot channels is 1 ∶3, and the detection and false-alarm probabilities are 0.8 and 10<sup>-3</sup> respectively.]]></description>
<pubDate>2016/5/6 16:32:21</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[TIAN Feng, TANG Xiaomei and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TIAN Feng, TANG Xiaomei and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602019]]></guid><cfi:id>91</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Zero bias anti-jamming filter design in non-ideal channel]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[There is non-zero bias for the receiver due to the anti-jamming filter in non-ideal channel. Furthermore, since the tap weights of the adaptive transversal filter varies based on jamming pattern, the bias will also vary. This problem of code tracking bias has been a significant hurdle to achieving interference suppression capabilities in precision global navigation satellite system applications. Aiming at this problem, using the symmetrical characteristic of non-ideal analog receiver channel, a new technique called zero bias anti-jamming filter was presented. The proposed method could be easy implement in engineering. Theoretical analysis and simulative results show that the proposed method is capable of reducing the bias to less than 0.2 ns, which is significantly smaller than the traditional adaptive anti-jamming filter.]]></description>
<pubDate>2016/5/6 16:32:21</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[FAN Guangteng, NI Shaojie, TANG Xiaomei, CHEN Huaming and SUN Guangfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FAN Guangteng, NI Shaojie, TANG Xiaomei, CHEN Huaming and SUN Guangfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602021]]></guid><cfi:id>90</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Calculation method of vessels′ shaft rate electric field equivalent source magnitude]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to exploit horizontal time-harmonic electric dipoles to model shaft rate electric field of practical vessels, the magnitude and location of equivalent source need to be determined. Aimed at vessels mounting the impressed current cathode protection system, the fact that the equivalent source is superimposition of two directionally opposite horizontal time-harmonic electric dipoles is clarified by analyzing the underlying physical mechanism of shaft rate electric field. On the basis of the former conclusion, a practical calculation method of equivalent source magnitude of shaft rate electric field was proposed, which means that the magnitude can be obtained by combining source magnitude of static electric dipole inverted from measured static electric field with the ratio coefficient between the maximum value of shaft rate signal envelope and that of static electric field signal. Besides, the location of equivalent source is identical to that of static electric dipole. The effectiveness of the proposed method is validated by the vessel model test. ]]></description>
<pubDate>2016/5/6 16:32:22</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHENG Rui, JIANG Runxiang and GONG Shenguang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHENG Rui, JIANG Runxiang and GONG Shenguang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602023]]></guid><cfi:id>89</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Impact analysis of CFAR detection for active decoy using interrupted-sampling repeater]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201601011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The impact of ISRJ (Interrupted-Sampling Repeater Jamming) on radar constant false alarm rate detection and the generation principle of false target using ISRJ were analyzed, and then generation methods of false targets jamming were given. On this basis, the detection cost caused by the false alarm and false dismissal in a search period of radar was chosen as the criteria of detection performance. The detection costs of CA-CFAR, OS-CFAR, CMLD-CFAR detectors for active decoy using IRSJ were analyzed, especially the influence of key factors of ISRJ on detection costs. Simulation result shows that the detection costs will increase remarkably for the active decoy from IRSJ and it is sensitive to the jammer power and duty ratios, but have little relationship to the repeating frequency. Among the three detectors, the detection costs of radar CMLDCFAR detectors are higher than those of the OS-CFAR and the CA-CFAR.]]></description>
<pubDate>2016/3/7 9:21:21</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[FENG Dejun, YANG Yong and XU Letao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FENG Dejun, YANG Yong and XU Letao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201601011]]></guid><cfi:id>88</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Delay-waiting detection method based on local maximum to suppress repeater spoofing interferences]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201601012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A large divide will be formed in the output signal of correlator after rejecting narrow-band interface. The traditional anti-interference method based on the time of arrival will be locked on the side-lobes of real signals. To solve this problem, a new delay-waiting detection method based on local maximum value was presented. Under the prerequisite that the side-lobes do  not superpose the spoofing signals, the method first searched the local maximum in three chips of main lobes to prevent the capture module from locking side-lobes. Then the earliest code-phase point from those local maximum was chosen to remove repeater spoofing jamming. Compare with the traditional anti-interference method based on the time of arrival, performance of the proposed method is similar in the absence of narrow-band interface, but it is significantly better in the narrow-band interface condition. The numerical simulation results validate the effectiveness of the method.]]></description>
<pubDate>2016/3/7 9:21:22</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[FAN Guangteng, HUANG Yangbo, LI Baiyu and SUN Guangfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FAN Guangteng, HUANG Yangbo, LI Baiyu and SUN Guangfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201601012]]></guid><cfi:id>87</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Estimate of radar beam′s azimuth using particle filter]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201601013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Traditional estimate method has limited capacity when the scan rate of radar antenna varies with time. Thus a state space model for estimating beam azimuth was established, and the particle filter was introduced to estimate the state variables. Particle filter is a powerful method for state estimation in non-linear and non-Gauss case， the radar beam′s azimuth estimating algorithm based on particle filter has better performance, and it can adapt to the case where the scan rate of radar antenna varies with time. The simulation results show that the applicability and the efficiency of the proposed algorithm are desired. ]]></description>
<pubDate>2016/3/7 9:21:22</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LU Shanshan<sup>1,2</sup>, WANG Wei<sup>1</sup> and WANG Guoyu<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Shanshan<sup>1,2</sup>, WANG Wei<sup>1</sup> and WANG Guoyu<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201601013]]></guid><cfi:id>86</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Flexible estimation framework for quality of information in wireless sensor network]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201601024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to establish an integrated estimation system for quality of information in WSN (wireless sensor network), a flexible tailorable framework was proposed to dynamically estimate information accuracy and information timeliness in different WSN applications. The framework aggregates all information of the sensor nodes at the sink node on the basis of information fusion theory and timescale marking technique. Through approximating the fusion result to ground truth, the accuracy of measurement data and decision information was quantified by utilizing the numerical/nominal difference between the observed information and the fusion result, respectively. According to application deadline and delay sensitivity of information acquisition, timeliness was classified as three categories for characterization and representation, and quantified through the lightweight measurement of the information acquisition time. The estimation results along the time are dynamically updated by adopting a sliding window mechanism and an incremental calculation algorithm. The effectiveness of the framework was validated by simulations, including timeliness estimation in three target surveillance application scenarios and accuracy estimation in two environmental monitoring application scenarios. Simulation results match with the reference criteria, which demonstrates that the framework can be flexibly tailored to estimate information accuracy and information timeliness in different WSN applications.]]></description>
<pubDate>2016/3/7 9:21:23</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GUO Hao, PAN Zhongming and ZHOU Jing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUO Hao, PAN Zhongming and ZHOU Jing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201601024]]></guid><cfi:id>85</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Optimized QoS-supported algorithm of opportunistic routing in wireless Mesh network]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to solve the problem of constrained resource and insufficient calculation ability in airbased backbone network and the problem of not fully considering load balancing and difference in requirement of QoS(quality of service) guarantee in the traditional SOAR(simple opportunistic adaptive routing) algorithm, a new algorithm was proposed to support the QoS named improvedSOAR routing algorithm. The algorithm defined comprehensive expected transmission count to describe the comprehensive state of links on the basis of taking the link congestion control and load balancing into consideration. It can effectively reduce the probability of network congestion. A route selection strategy was designed for QoS based on AHP method, according to the service type difference in transmission network. It can achieve the dynamic matching between the path selection and the different service type. Simulation results show that the improved-SOAR routing algorithm has better performance in the transmission delay, the throughput and the throughput rate than the traditional SOAR routing algorithm under heavy network load. When there are different types of services in the network, the improvedSOAR routing algorithm adaptively selects the best transmission path according to the difference of requirement about the QoS guarantee.]]></description>
<pubDate>2018/1/16 17:02:01</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIANG Jun<sup>1</sup>, ZHANG Zhenhao<sup>1</sup>, XIAO Nan<sup>1</sup>, LIU Yulei<sup>1</sup>, HU Meng<sup>1</sup> and ZHUO Kun<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIANG Jun<sup>1</sup>, ZHANG Zhenhao<sup>1</sup>, XIAO Nan<sup>1</sup>, LIU Yulei<sup>1</sup>, HU Meng<sup>1</sup> and ZHUO Kun<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706021]]></guid><cfi:id>84</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Texture image feature selection and optimization by using K-means clustering]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Gabor transform and K-means algorithm are two commonly used texture analysis methods. However, the texture feature vector has a high dimension by using Gabor transform, which will influence the operating efficiency. Meanwhile, K-means algorithm is affected by the initial clustering centers, and it may lead to the decrease of classification accuracy. Although, some optimization algorithms like genetic algorithm and particle swarm optimization algorithm could improve the performance of K-means algorithm to some extent, the optimization effect is difficult to guarantee as the increase of dimension. Hence, the Relief algorithm was applied to make a feature selection for Gabor texture feature, and to obtain a suitable texture feature subset. Furthermore, a differential evolution algorithm was used to optimize the clustering center of K-means algorithm, and enhance the accuracy and efficiency of texture recognition. Experimental results demonstrate that the dimension of texture feature vector by using the proposed method is obviously lower than that by using the original feature set, and the recognition accuracy is also apparently improved than the basic K-means algorithm.]]></description>
<pubDate>2018/1/16 17:02:01</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Mingwei<sup>1</sup>, WAN Youchuan<sup>1</sup>, GAO Xianjun<sup>2</sup> and YE Zhiwei<sup>3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Mingwei<sup>1</sup>, WAN Youchuan<sup>1</sup>, GAO Xianjun<sup>2</sup> and YE Zhiwei<sup>3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706022]]></guid><cfi:id>83</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study on ultra-wideband SAR image feature of negative obstacle]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Negative obstacle sensing is one of the most difficult problems for unmanned ground vehicle in unstructured environments. The regular obstacle sensors, such as stereo vision, infrared detector and ladar, have their limited performances in unconstructed environments. Ultrawideband SAR (synthetic aperture radar) sensors have the ability to operate in all weather, all lighting and foliage covered conditions, which have been received widely. Sensing negative obstacle by ultrawideband SAR for unmanned ground vehicle was an effective way. Image geometry of negative obstacle was expounded. The simulation image of negative obstacle was obtained by simulation based on MATLAB, and the conclusion that the image feature of negative obstacle is the shadow area next to shine area is obtained. Moreover, a real data experiment is presented and the experimental result proves the same conclusion again.]]></description>
<pubDate>2018/1/16 17:02:01</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[JIANG Zhibiao, WANG Jian, SONG Qian and ZHOU Zhimin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIANG Zhibiao, WANG Jian, SONG Qian and ZHOU Zhimin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706023]]></guid><cfi:id>82</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Improved energy detection scheme of cognitive anti-jamming system based on simultaneous transmitting and receiving]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to enhance the anti-jamming operational capability of cognitive antijamming system based on simultaneous transmitting and receiving in the complex electromagnetic environment, an improved energy detection scheme based on the system was studied and the closed expressions of detection probability, false probability and outage probability of the system under Rayleigh fading channels were derived. The scheme decides the detection threshold by obtaining the result of comparison between the selfinterference channel capacity and the required transmission speed for receiver. Simulation results show that the effect of receiver impacted by selfinterference can be reduced and the outage performance of the system can also be improved by the proposed detection scheme.]]></description>
<pubDate>2018/1/16 17:02:01</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Haitao<sup>1</sup>, LI Jiayu<sup>1</sup> and FANG Zheng<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Haitao<sup>1</sup>, LI Jiayu<sup>1</sup> and FANG Zheng<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706024]]></guid><cfi:id>81</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Optimization on ranging deviation of reference station receivers in pseudolite augmentation system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The pseudo-satellite is stationary for the reference station receiver, therefore, the distance among reference station receivers is nearly kept constant. On that condition, the error caused by sampling and quantization is not Gaussian variables, which can have impact on the measurement accuracy. In order to solve the problem, the digital signal model of satellite navigation receiver was introduced, and then the effect of sampling and quantization error on measure bias was analyzed. Simulation results are presented to support the conclusion, and the optimization of reference receiver in pseudosatellite system is proposed in the end. ]]></description>
<pubDate>2018/1/16 17:02:02</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Bo, SUN Guangfu, CHEN Huaming and OU Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Bo, SUN Guangfu, CHEN Huaming and OU Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706026]]></guid><cfi:id>80</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Jitter mitigation model for time signal transferred via troposcatter]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[During the transmission process of time synchronization signal in troposcatter channel, the multipath effect and noise of the channel can contribute jitter to time synchronization signal. In order to mitigate this jitter, the EMD (empirical mode decomposition) combined with wavelet threshold model was proposed. In the combined model, the EMD was used to decompose the original signal, the wavelet threshold was adopted to process the decomposed components and then the processed results were utilized to reconstruct the final signal. In order to improve the jitter mitigation effect and the signal authenticity of the combined model, the traditional threshold function in wavelet threshold was perfected by the better coherent and gentler threshold function. Experimental data were used to demonstrate this combined model. Compared with the simplex model and the Kalman model, the combined model has advantage in effect of de-noising as well as authenticity.]]></description>
<pubDate>2018/1/16 17:02:02</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Zan, CHEN Xihong, LIU Jin and PENG Boyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Zan, CHEN Xihong, LIU Jin and PENG Boyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706027]]></guid><cfi:id>79</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[BeiDou multi-service satellite system and application—review on BeiDou Bs navigation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705001]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Radio frequency is a non-renewable resource, and frequency sharing has become the consensus of the International Telecommunication Union. Multi-service integration has been the development trend of the world radio satellite system. S band 2483.5 MHz ~ 2500 MHz has been allocated into the sharing band of satellite multi-service including radio determinations satellite service, radio navigation satellite service and mobile satellite service by International Telecommunication Union, and is expected to provide four functions: satellite navigation, route tracking, emergency rescue and information relay. The development of S band space based system, the frequency characteristics of navigation communication and the prospect of S band multi-service were introduced, the future application and social and economic benefits of the S band navigation in China were predicted. ]]></description>
<pubDate>2017/11/7 15:44:02</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[TAN Shusen and ZHANG Tianqiao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TAN Shusen and ZHANG Tianqiao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705001]]></guid><cfi:id>78</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Constant envelope modulation and multiplexing technologies for BDS global navigation signals]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705002]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For the demand of structural enhancement and backwards compatibility of modern BDS navigation signal which is represented by the pilot channel, BDS has proposed several new constant envelope modulations recently, including QMBOC and ADualQPSK modulations applied to B1 band, TD-AltBOC and ACE-BOC modulations applied to B2 band, DualQPSK modulation applied to B3 band, GCE-BOC modulation that multiplexes arbitrary signals at two different carrier frequencies. All the new modulations were systematically analyzed and a unified analytical expression of constant envelope modulation and multiplexing was summarized on the basis of the GCE-BOC modulation, which can provide an important reference for the comprehensive understanding of the signal design of the BDS global navigation satellite system and the development of new type of constant envelope modulation and multiplexing technology on this basis.]]></description>
<pubDate>2017/11/7 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHU Xiangwei, HUANG Xinming<sup>1</sup>, SU Chengeng<sup>2</sup>, ZHOU Hongwei<sup>2</sup> and OU Gang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHU Xiangwei, HUANG Xinming<sup>1</sup>, SU Chengeng<sup>2</sup>, ZHOU Hongwei<sup>2</sup> and OU Gang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705002]]></guid><cfi:id>77</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Applying support vector machine to faulty channel detection in vector tracking loop]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705004]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to overcome the faulty channels’ influence on the receiver and improve the robustness of the vector tracking loops, a faulty channel detection algorithm, which employs the innovative sequences of the navigation filter as the input vector of a support vector machine, was proposed. A trained support vector machine was used to classify the channel as faulty or not faulty. If the channel is classified as faulty, it will not be included in the navigation filter to update the navigation results. In this way, the algorithm can eliminate the bad influence of the faulty channels. The simulation results show that this method can accurately detect faulty channels, and  improve the performance and robustness of the vector tracking loops.  ]]></description>
<pubDate>2017/11/7 15:44:02</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[JIANG Changhui<sup>1</sup>, CHEN Shuai<sup>1</sup>, BO Yuming<sup>1</sup>, DENG Guijun<sup>2</sup> and QU Xinfen<sup>3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIANG Changhui<sup>1</sup>, CHEN Shuai<sup>1</sup>, BO Yuming<sup>1</sup>, DENG Guijun<sup>2</sup> and QU Xinfen<sup>3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705004]]></guid><cfi:id>76</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Uncorrelated differential robust estimation of frequency stability based on Huber weight function]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705005]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The atomic clock′s frequency stability estimated by Allan variance will significantly deviate from its true value if anomalies occur. An uncorrelated differential robust estimation method based on Huber weight function was proposed. Firstly, a difference estimation model of Allan variance was established, and the computation complexity of noise identification and whitening introduced by correlated difference was analyzed on the basis of the statistical property of the clock difference sequence. In order to solve this problem, a construction model of uncorrelated difference sequence was established to avoid complex noise identification and whitening computation effectively. Based on this, the uncorrelated difference robust estimation method of Allan variance was derived, followed by a counteracted technique of error accumulation introduced by robust estimation. Finally, the integrated robust estimation solution was given, and its effectiveness was verified by experiment. The results show that the method has significance robustness for phase outliers and phase jumps, and the relative deviation introduced by anomalies can be reduced from almost 200% to less than 10%.]]></description>
<pubDate>2017/11/7 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GONG Hang, ZHU Xiangwei, LIU Zengjun, LI Jingyuan and SUN Guangfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GONG Hang, ZHU Xiangwei, LIU Zengjun, LI Jingyuan and SUN Guangfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705005]]></guid><cfi:id>75</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Performance analysis of global navigation satellite system anti-jamming optimal receivers and correlation receivers]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to reduce the hardware realization difficulty, the GNSS(global navigation satellite system) sole antenna anti-jamming correlation receivers were studied in partialband interferences circumvent. Their frequency responses, SINR (signal-to-interference-noise ratio) losses and correlation output functions were analyzed. It is shown that the SINR losses of anti-jamming optimal receivers and correlation receivers will increase with the bandwidth and power increase of interferences. The SINR losses will decrease with the bandwidth increase of noise and the frequency difference will increase between interferences and signals. Moreover, the match and correlation output main lobes will be depressed and the side lobes will be raised by jammers so as to affect the acquisition, track and multipath mitigation performance of anti-jamming receivers. Analysis results will provide the design basis for the GNSS anti-jamming receivers.]]></description>
<pubDate>2017/11/7 15:44:02</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Zhengrong<sup>1</sup>, CHEN Huaming<sup>1</sup>, WANG Feixue<sup>1</sup> and WANG Jia<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Zhengrong<sup>1</sup>, CHEN Huaming<sup>1</sup>, WANG Feixue<sup>1</sup> and WANG Jia<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705006]]></guid><cfi:id>74</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Carrier tracking in presence of ionosphere scintillation using online wavelet de-noising]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Since carrier tracking in presence of ionospheric scintillation is non-stationary, nonlinear and non-Gaussian, the conventional discriminator or Kalman filter-based methods used to enhance the robustness of tracking loops are less effective. A carrier tracking algorithm for scintillation mitigation was proposed based on online wavelet denoising, which can characterize the nonstationary scintillation signal much better. By designing a sliding windowbased online wavelet de-noising filer after the integration of I and Q channels, the non-Gaussian noise caused by scintillation can be filtered effectively. As a result, the effect of ionospheric scintillation on loop discriminator is mitigated, and the accuracy and robustness of the tracking loop is improved. Experimental results prove the validity of the analysis and the proposed carrier tracking algorithm.]]></description>
<pubDate>2017/11/7 15:44:02</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SUN Pengyue, TANG Xiaomei, HUANG Yangbo, CHEN Huaming and SUN Guangfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SUN Pengyue, TANG Xiaomei, HUANG Yangbo, CHEN Huaming and SUN Guangfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705007]]></guid><cfi:id>73</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Parallel correlation algorithm based on vector dot product]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For solving the real-time problem of the software correlator, a parallel receiving model of spread spectrum signal based on vector dot product was proposed. The calculation speed of the signal correlation was improved by parallel computing correlation value of each channel with a large number of ALU in GPU(graphics processing unit). Simulation results show that, 25 channels with 150 correlation computation consume 967 μs in all for 1 ms signal of 25 MHz sampling rate by using the vector dot product parallel correlation algorithms based on GPU. Compared with the implementation on CPU based on MKL(math kernel library), the proposed method speeds up to 61.4 times, and the real-time correlation of the broadband spread spectrum signals in software can be realized.]]></description>
<pubDate>2017/11/7 15:44:02</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[MOU Weihua<sup>1,2</sup>, NI Shaojie<sup>1</sup>, BAI Yang<sup>3</sup>, SUN Guangfu<sup>1,2</sup> and OU Gang<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>MOU Weihua<sup>1,2</sup>, NI Shaojie<sup>1</sup>, BAI Yang<sup>3</sup>, SUN Guangfu<sup>1,2</sup> and OU Gang<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705009]]></guid><cfi:id>72</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[BeiDou positioning accuracy improvement based on pseudolites]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[BeiDou satellites concentrates near the equator, which results in a low positioning accuracy within the homeland in north-south direction. Because the visible satellites are positive elevation, the vertical positioning accuracy is also low. To solve the above problems, a method to improve BeiDou satellites positioning accuracy was proposed, which uses pseudolites to improve the user observation geometry. The least square positioning algorithm based on the combination of pseudolites and satellites was derived. Dilution of positioning in north-south and vertical direction were also proposed to evaluate the positioning precision. Simulation results show that the dilution of positioning in north-south and vertical direction can be reduced effectively by lying pseudolites in the north area of users, thus the positioning accuracy can be effectively improved.]]></description>
<pubDate>2017/11/7 15:44:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Bo<sup>1</sup>, LI Hao<sup>2</sup> and OU Gang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Bo<sup>1</sup>, LI Hao<sup>2</sup> and OU Gang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705010]]></guid><cfi:id>71</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Processing the sliding spotlight bistatic SAR combine with direct-path signal compensation in frequency domain]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In fixed-receiver bistatic SAR (synthetic aperture radar), the spaceborne SAR was used as the illuminator. The direct-path signal and the backscattering echo were sampled, synchronized and focused by the receiver. The geometry of fixed receiver bistatic SAR was introduced. After the direct-path signal was used as reference signal for range match filtering, the spatial variation of chirp rate, range cell migration and two-dimensional spectrum were analyzed. Based on azimuth preprocessing, direct-path signal compensation and nonlinear Chirp Scaling imaging algorithm, a new focusing algorithm was presented. Simulation results of point targets were presented to validate the feasibility and efficiency of the proposed method. This algorithm was also validated by the measured data of the HITCHHIKER system.]]></description>
<pubDate>2017/11/7 15:44:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YAN Feifei, CHANG Wenge, LI Xiangyang and ZHANG Qilei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YAN Feifei, CHANG Wenge, LI Xiangyang and ZHANG Qilei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705016]]></guid><cfi:id>70</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Scattered pilots aided channel estimation based on compressed sensing in OQAM/OFDM system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Under the multi-path channel condition, the preamble-based channel estimation methods have very large pilots overhead in OQAM/OFDM (offset quadrature amplitude modulation/orthogonal frequency division multiplexing). To solve this problem, a scattered pilots aided channel estimation method based on the compressed sensing for OQAM/OFDM system was proposed by utilizing the sparsity of wireless channel. The principle of OQAM/OFDM channel estimation method based on compressed sensing was established and a scattered pilots pattern, which deploys pilots symbols on few subcarriers randomly, was also designed. The proposed method can reduce the pilots overhead significantly and realize the highly accurate channel estimation. The simulation results validate the efficacy and the superior performance of the proposed method in both slow and fast time-varying wireless channel.]]></description>
<pubDate>2017/11/7 15:44:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Xiaopeng, CHEN Xihong, XIE Zedong, ZHANG Kai and TONG Ningning]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Xiaopeng, CHEN Xihong, XIE Zedong, ZHANG Kai and TONG Ningning</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705017]]></guid><cfi:id>69</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Particle filtered matching pursuit for signal reconstruction]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A particle filtered matching pursuit for compressive sensing of blind sparsity signal polluted by non-Gaussion noise was proposed, while the conventional detectors(e.g. least-squares estimates) were known to be sensitive to the non-Gaussion nature of noise. The proposed algorithm which combined the Huber cost(loss) function with an l<sub>1</sub>-norm did not need the sparse prior while it eliminated the interference of measuring noise by particle filter estimation. Meanwhile, sparsity adaptive matching pursuit was used to sift the effective support set so as to inverse the original states. Simulation results indicate that the proposed algorithm outperforms the existing greedy iterative inversions in the same condition, especially in the non-Gaussion noise situation.]]></description>
<pubDate>2017/11/7 15:44:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Yulei<sup>1</sup>, LIANG Jun<sup>1</sup>, XIAO Nan<sup>1</sup>, HU Meng<sup>1</sup> and YANG Meng<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Yulei<sup>1</sup>, LIANG Jun<sup>1</sup>, XIAO Nan<sup>1</sup>, HU Meng<sup>1</sup> and YANG Meng<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705018]]></guid><cfi:id>68</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on the method of multipath prediction in city scene based on backward ray tracing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Multipath is the key factor which affects communication, navigation system performance. It not only affects the signal power, but also causes time delay, frequency shift and polarization parameters changing, resulting in a decrease in the communication and navigation system. To solve this problem, the fast reverse ray tracing algorithm based on virtual source tree, partition, backward detection, was proposed to predict multipath signal loss and delay distribution accurately. Besides, the urban scenes were taken as examples to show the algorithm of signal multipath transmission, and the diffraction algorithm was studied to improve the accuracy of the prediction. Taking the signal propagation through simplified street models for example, the consistency of reflection path and power distribution can be proved by comparing with the MATLAB program based on the proposed algorithm and the simulation from using Wireless Insite software, in which way, the validity of the algorithm was also verified.]]></description>
<pubDate>2017/11/7 15:44:03</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[GUO Shuxia<sup>1</sup>, YU Xuewei<sup>1</sup>, WANG Yafeng<sup>1</sup> and GAO Ying<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUO Shuxia<sup>1</sup>, YU Xuewei<sup>1</sup>, WANG Yafeng<sup>1</sup> and GAO Ying<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705019]]></guid><cfi:id>67</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[High-accuracy fractional delay filter design based on Remez algorithm with boundary fitting]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to improve the ranging accuracy between satellites and increase the available bandwidth of systems in the simulation and tests, a design algorithm for high-accuracy fractional delay filter based on the boundary fitting Remez algorithm was proposed. The proposed algorithm used the polynomial approximation thought of Farrow structure to fit the impulse response boundary coefficients of the filter designed by Remez algorithm, and achieved fractional delay filters through the polyphase decomposition. The proposed algorithm achieved continuous impulse response boundary when high-order filters was used, while the group delay error was reduced  and the accuracy was improved. The simulation results show that the proposed algorithm improves the accuracy of fractional delay filters a little, doubles the available bandwidth and reduces the number of multipliers need to be used.]]></description>
<pubDate>2017/11/7 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Tong<sup>1,2</sup>, YAN Yi<sup>1</sup>, WANG Chunmei<sup>1</sup>, YAO Xiujuan<sup>1</sup> and CHEN Ding<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Tong<sup>1,2</sup>, YAN Yi<sup>1</sup>, WANG Chunmei<sup>1</sup>, YAO Xiujuan<sup>1</sup> and CHEN Ding<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705020]]></guid><cfi:id>66</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Deceptive jamming suppression and discrimination based on frequency diversity array]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201704011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Considering the suppression of transmitting deceptive jamming in radar countermeasure, a discrimination method based on frequency diversity array was proposed. In FDA(frequency diversity array) radar, the phase difference between different element of echo was dependent on both range and angle，which implies that the false targets could be suppressed due to the mismatch in either range or angle. The phase difference formula of echo, jamming and mixed signal were derived, the influence on the phase difference of matched filtering, frequency shift and signal mixing was analyzed in detailed, and the entire identifiable process was introduced . The effectiveness of our proposed scheme in suppressing jamming was demonstrated via theoretical analysis and computer simulations. Results show that the proposed method can discriminate false targets successfully in different scenarios and  has a better environmental adaptation.]]></description>
<pubDate>2017/9/12 10:09:49</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Zhaojian, XIE Junwei, LI Xin, SHENG Chuan and HU Qiyong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Zhaojian, XIE Junwei, LI Xin, SHENG Chuan and HU Qiyong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201704011]]></guid><cfi:id>65</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Quality assessment and error correction of BeiDou satellite pseudorange signal]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201704013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Regarding  the problem of systematic pseudorange bias in BeiDou navigation system application, the pseudorange observations quality of Beidou triple frequency was analyzed from the multipath angle. The analysis results verified that the bias was related to the type of satellite orbit, satellite elevation angle and the signal frequency. In order to eliminate the effects of this systematic bias, a correction model for triple-frequency pseudorange bias was established with the continuous piecewise linear function. Compared with the traditional correction model, the proposed model used the Beidou measured data from a longer range and considered the accuracy of information of corrections. The correctness and superiority of the proposed model were verified by the experimental results on the basis of the dynamic precise point positioning.]]></description>
<pubDate>2017/9/12 10:09:50</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[NI Shaojie<sup>1</sup>, WANG Yaoding<sup>1</sup>, FENG Xin<sup>2</sup> and WANG Feixue<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>NI Shaojie<sup>1</sup>, WANG Yaoding<sup>1</sup>, FENG Xin<sup>2</sup> and WANG Feixue<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201704013]]></guid><cfi:id>64</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Variable-length slots allocation for hierarchical users in the massive MIMO systems]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201704017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The length of physical slot is stationary in the time division duplex mode of the Massive MIMO system. Consequently, the length of the allocated physical slots cannot be adjusted according to different lengths of coherence intervals. The mismatch between slot and coherence leads to a waste of the time-frequency resource. Therefore, the whole network capacity of the system is not optimal. A variable-length slot allocation scheme based on hierarchical users was proposed to make the allocated physical slots match their corresponding coherence intervals well. In the proposed scheme, terminals were divided into different categories according to their mobility, and variable length slots were assigned to terminals in different categories flexibly. So the waste of time-frequency resource waste and the excessive channel estimation can be alleviated. The resource efficiency and the sum rate of the system are verified to be optimized and the simulation validates the proposed scheme. ]]></description>
<pubDate>2017/9/12 10:09:50</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHOU Zhichao<sup>1,2</sup> and WANG Dong<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Zhichao<sup>1,2</sup> and WANG Dong<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201704017]]></guid><cfi:id>63</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Multipath mitigation technique of GNSS double phase estimator using subcarrier reference waveform method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201703007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to achieve the unambiguous and antimultipath reception of the BOC (binary offset carrier) signal, the DPE (double phase estimator) was modified by introducing a strobe waveform in the prompt signal correlation process of the SPLL (subcarrier phase lock loop) integration. The modified DPE possesses multipath error mitigation performance and employs no additional correlator. The theory and the realization of the proposed approach were explained and analyzed, and the performance of the modified DPE was characterized according to the SMEE (subcarrier multipath error envelope) and the tracking jitter. Simulation results show that, compared with the conventional DPE, the proposed algorithm can provide a reduction in the SMEE area of 81.1% for signal BOC(1,1) and 75.1% for signal BOC(14,2). However, the modified DPE experiences a loss of-6 dB in terms of the postcoherent signaltonoise ratio, which impacts its tracking precision. Thus, the selection of waveform parameters involves a tradeoff between the tracking performances obtained under multipath and thermal noise conditions. Above all, the proposed method is applicable to the receiving problems of multipath environment or non weak signal case.]]></description>
<pubDate>2017/7/9 11:57:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Chengtao, TANG Xiaomei, HUANG Yangbo, CHEN Huaming and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Chengtao, TANG Xiaomei, HUANG Yangbo, CHEN Huaming and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201703007]]></guid><cfi:id>62</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Improved least mean square algorithm for power-inversion global navigation satellite system antenna array]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201703008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The power-inversion adaptive array is very suitable for situations where the desired signals are very weak while the interfering signals are much stronger, thus, it is widely used in the global navigation satellite system. For least mean square based on power-inversion adaptive array which is used in global navigation satellite system receivers, the convergence rate was very slow when sudden change in interference number or interference power occurs. The performance of receiving the satellite signals would be degraded. The cause of this phenomenon was analyzed. Then, an improved least mean square algorithm was proposed to solve this problem. The key novelty of the proposed method was that it monitors the power of the reference antenna output to detect any sudden change in interference number or interference power. Once the interference number or interference power decreases suddenly, the weight vector would be initialized again to improve the rate of convergence. Simulation results show that the improved method outperforms the original algorithm in rate of convergence.]]></description>
<pubDate>2017/7/9 11:57:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Feiqiang, NIE Junwei, NI Shaojie and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Feiqiang, NIE Junwei, NI Shaojie and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201703008]]></guid><cfi:id>61</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[MIMO radar waveform design method based on quadratically spatial and spectral optimizations under jamming]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201703021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For the optimization problem of MIMO(multiple input multiple output) radar transmit beampattern under jamming, a new MIMO radar waveform design method based on quadratically spatial and spectral optimization was proposed. Firstly, the proposed method converted the problem of MIMO radar transmit beampattern design into the optimization problem about the covariance matrix of MIMO radar’s transmit spacetime sequences. Based on the fact that MIMO radar transmit beampattern was only decided by the correlation of each element’s transmit waveforms, the computational burden of the spatial optimization of waveforms could be reduced. Furthermore, the nulling towards the jamming direction of the transmit beampattern was broadened by the porder derivative constraint. With the optimized covariance matrix, the randomization method was used to synthesize the actual constant modular waveforms under the criteria of least square to gain on the optimal beampattern. Finally, with the optimized waveforms through spatial optimizing process, a phase flexible diagonal matrix was optimized with the likepower method to achieve the spectral optimization of MIMO radar waveforms based on the fact that MIMO radar transmit beampattern would not be influenced by the change of the initial phase of transmit sequence at a certain moment. And the spectral jamming could be avoided by the spectral optimization of waveforms. Simulation results prove the effectiveness of the proposed method in matching desired beampattern and antijamming.]]></description>
<pubDate>2017/7/9 11:57:44</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Yuxi, HUANG Guoce, LI Wei and HU Jikuan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Yuxi, HUANG Guoce, LI Wei and HU Jikuan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201703021]]></guid><cfi:id>60</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Full-polarization radar target recognition of multitask compressive sensing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201703022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To efficiently utilize the information which can be extracted for target recognition and the character that different polarization channels characterize the same structure signature of a target using different polarization modes to boost recognition performance, a method for full-polarization HRRP recognition based on multitask compressive sensing was proposed. Each singlepolarization HRRP was represented by the atoms adaptively selected from its associated dictionary, and the atoms derived from different dictionaries corresponded to the same index set. Compared with the conventional methods, the proposed method has the significant advantage of exploiting the correlation among single-polarization HRRPs to enhance recognition performance. Experiments were carried out on simulated data, and the results demonstrate the efficiency of the proposed method.]]></description>
<pubDate>2017/7/9 11:57:46</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHAI Qinglin<sup>1</sup>, LIU Shengqi<sup>2</sup>, HU Jiemin<sup>1</sup> and ZHAN Ronghui<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAI Qinglin<sup>1</sup>, LIU Shengqi<sup>2</sup>, HU Jiemin<sup>1</sup> and ZHAN Ronghui<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201703022]]></guid><cfi:id>59</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Radar coincidence imaging for extended targets in sparse Bayesian learning framework]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201703023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Radar coincidence imaging is a high-resolution staring imaging technique without the limitation of relative motion between target and radar. Conventional radar coincidence imaging methods ignore the structure information of complex extended target, which limits its applications in high resolution imaging, thus an adaptive pattern-coupled sparse Bayesian learning algorithm was proposed. To model the extended target, a pattern-coupled hierarchical Gaussian prior model was introduced in sparse Bayesian learning framework, and then the algorithm alternated between steps of target reconstruction and parameter optimization under the variational Bayesian expectation maximization framework. Therefore, the reconstruction of each coefficient involved its immediate neighbors, and the parameter indicating the pattern relevance between the coefficient and its immediate neighbors was updated adaptively during the iterations. Experimental results demonstrate that the proposed algorithm can achieve high resolution imaging effectively for the extended target.]]></description>
<pubDate>2017/7/9 11:57:46</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHOU Xiaoli, WANG Hongqiang, CHENG Yongqiang and QIN Yuliang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Xiaoli, WANG Hongqiang, CHENG Yongqiang and QIN Yuliang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201703023]]></guid><cfi:id>58</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Assessment method for radar network detection capabilities of the improved IAHP-CIM model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201703024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at evaluating radar network detection capabilities, firstly, a multilevel evaluation index system was established by using the fishbone diagram to analyze various complex factors. Secondly, the IAHP-CIM (interval analytic hierarchy process-controlled intervals and memory) model was proposed to evaluate the index system. Specifically, interval analytic hierarchy process was used to solve the problem of quantified fuzzy index, and the interval judgment matrix was obtained; the Shuffled frog leaping algorithm was applied to optimal interval matrix and the certain number matrix with the minimum consistency ration was obtained; the risk probability of indexes were acquired by the controlled intervals and memory model, and synthetically the index system was evaluated. Finally, simulation results demonstrate the feasibility of the proposed evaluation method, and the relatively objectivity of evaluation conclusion are of great significance to optimize arrangement for radar network. ]]></description>
<pubDate>2017/7/9 11:57:47</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CUI Yujuan and CHA Hao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CUI Yujuan and CHA Hao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201703024]]></guid><cfi:id>57</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of coverage and integration time in spaceborne/airborne bistatic synthetic aperture radar configurations]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201702011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Due to the big difference between the velocities of the transmitter and the receiver, the working mode should be reasonably designed to realize high resolution and extended scene in SA-BiSAR (spaceborne/airborne bistatic synthetic aperture radar system). Based on the ratio of the beam width to the velocity, a scheme for the computation of integration time and azimuth coverage of SA-BiSAR was described. A classification of bistatic SAR(synthetic aperture radar) configurations was introduced in terms of the antenna footprints′ size and the velocities. At the same time, accurate effect of the initial footprints offset on the image performance in azimuth direction was obtained. Simulation results validate that the proposed method can be well used for footprint synchronization error analysis and SA-BiSAR system design.]]></description>
<pubDate>2017/5/11 16:56:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YAN Feifei, CHANG Wenge, LI Xiangyang and ZHANG Qilei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YAN Feifei, CHANG Wenge, LI Xiangyang and ZHANG Qilei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201702011]]></guid><cfi:id>56</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Detection of spoofing threats by inertial assisted three elements antenna]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201702013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[DOA (direction-of-arrival) discrimination is one of the most effective spoofing detection methods. There are two forms of DOA, one is the carrier phase single difference and the other  is the carrier phase double difference. However, the carrier phase single difference cannot be used in the motion vector, and the carrier phase double difference will be ineffective in detecting single spoofing signal or multi-elements spoofing transmitter. In order to solve this problem, a method based on the inertial assisted three elements antenna was introduced. This method was applied to motion vectors, the motion vectors using this method can detect the spoofing only by means of moving a distance during a certain time. This method not only can be effective for several spoofing signals from the same antenna, but also can detect single spoofing signal or multi-elements spoofing transmitter with strong ability. The proposed spoofing detection method was verified to be effective through theoretical analyses and simulation tests. The results indicate that the longer the displacement distance of the receiver antenna is, the better the spoofing detection performance of the proposed method is; the closer to spoofer from the receiver antenna is, the better the spoofing detection performance of the proposed method is; the more vertical between DOA and antenna displacement direction is, the better the spoofing detection performance of the proposed method is.]]></description>
<pubDate>2017/5/11 16:56:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[FAN Guangteng, HUANG Yangbo, WU Wei, ZHU Xiangwei and SUN Guangfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FAN Guangteng, HUANG Yangbo, WU Wei, ZHU Xiangwei and SUN Guangfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201702013]]></guid><cfi:id>55</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Multiplicity detection of multiple unresolved targets using complex monopulse ratio]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201702014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The statistical property of monopulse ratio was derived under the condition of single target and multiple unresolved targets. According to the inherent difference, the multiplicity detection algorithm was proposed using complex monopulse ratio. Taking two targets as an example, the detection performance was presented by Mont Carlo simulations, with respect to the SNR (signal to noise ratio), the angle interval and the complex amplitude ratio. Some meaningful conclusions are inferred qualitatively. When one target predominates, the detection performance is low. As for two comparative targets, the detection performance is improved with the increase of the phase difference. This algorithm can eliminate the outliers of estimated angle effectively and can lay the foundation for the resolution and measurement process of multiple targets.]]></description>
<pubDate>2017/5/11 16:56:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Zhenhai, WANG Luoshengbin and LIU Xinghua]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Zhenhai, WANG Luoshengbin and LIU Xinghua</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201702014]]></guid><cfi:id>54</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Construction algorithm of APPS-LDPC codes with low error floor]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201702016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to lower the error floor of LDPC (low-density parity-check) codes, a new class of APPS-LDPC (arithmetic progression and partition shift LDPC) codes was proposed. The APPS-LDPC codes are based on cycle path description theory with arbitrary code length, code rate, column weight. The girth of their Tanner graph is at least eight. Cyclic shift coefficients can be described in simple analytic expressions to reduce required memory usage. The simulation results show that the proposed APPS-LDPC code (496,248) gets a coding gain of 1.9 dB at least compared to the PEGLDPC (progressive edgegrowth LDPC) code at BER (bit error rate) 10<sup>-5</sup>. And at high signal to noise ratio region, the gap between two decoding curve increases gradually. Besides, APPS-LDPC code (6144, 5376) whose column degree is 3 gets a coding gain of 0.25 dB at least compared to the PS-LDPC  code at BER 10<sup>-8</sup>, and there′s no obvious error floor phenomenon when the signal to noise is above 4.6 dB. The performance of the proposed algorithm also outperforms the 4-girth or the 6-girth PEG-based LDPC codes, especially in error floor region. The time-consuming and complexity for constructing an APPS-LDPC code also show some advantages over PS-LDPC code and PEG-LDPC code. And through trapping sets searching method based on Tanner graph, there is no small trapping set composed by cycle 8 in (496,248) APPS-LDPC code, which demonstrates the reduction of the error floor.]]></description>
<pubDate>2017/5/11 16:56:54</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LEI Jing<sup>1</sup>, DONG Le<sup>1,2</sup> and LI Erbao<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LEI Jing<sup>1</sup>, DONG Le<sup>1,2</sup> and LI Erbao<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201702016]]></guid><cfi:id>53</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Method of direction of arrival tracking for multiple targets under water with single vector hydrophone]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201702017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The direction of arrival (DOA) of multiple targets was acquired by solving non-liner correlation equations involving acoustic pressure and particle velocity with quantum particle swarm algorithm. In order to improve the precision, the DOA tracks of multiple targets were fitted with the method of least squares, the prediction model was found and then the DOA tracks were optimized by Kalman filter. The results indicate that the DOA of multiple targets can be resolved with the single vector hydrophone and the results should be expressed by statistic characteristics. The maximum number of unknown sources is 7. As the number increases, the DOA error is more serious. When the signal to noise ratio is higher, the resolution ratio and precision are also higher and the deviation is smaller. More importantly, the precision of DOA can be improved effectively by the method of data fitting and the Kalman filter. ]]></description>
<pubDate>2017/5/11 16:56:55</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Wei and SHANG Ling]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Wei and SHANG Ling</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201702017]]></guid><cfi:id>52</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Self-adjusting modulation algorithm for orthogonal frequency division multiplexing underwater acoustic communication]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201701024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Regulations between pre-estimated channel length and estimation precision were analyzed. The estimation quality was evaluated in time using statistics of the equalized signals which can help adjust the length of channel estimation algorithm automatically. In view of the differences among subcarriers caused by underwater acoustic channels, a new algorithm which realized optimum rate and power assignments based on channel estimating results was put forward. Compared with the traditional algorithm which assigned rate and power equally to each subcarrier, the new algorithm achieved better property of bit error rate. Simulations and experiments validate the effectiveness and correctness of the researching contents. ]]></description>
<pubDate>2017/3/7 11:55:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LUO Yasong<sup>1</sup>, HU Shengliang<sup>1</sup>, LIU Zhikun<sup>1</sup> and LYU Xianchun<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LUO Yasong<sup>1</sup>, HU Shengliang<sup>1</sup>, LIU Zhikun<sup>1</sup> and LYU Xianchun<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201701024]]></guid><cfi:id>51</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Locating method of moving periodic sound source with double-array]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201701027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the problems of intensive calculation and difficulty in testing with common methods of moving sound source locating, a locating method based on array signal processing was proposed. Locating ability of single and double five-element cross array were analyzed. Based on the high performance of direction estimating with single array, location of moving sound source was achieved by the double arrays crossing method according to the thought of frame processing in beamforming. Locating experiment was carried out when using engine noise of self-propelled vehicle as simulated source. Then the length selection of short correlation and compensation of moving path were studied. Experiment shows that the method is effective for moving sound source locating with high precision, maximum relative error stays below level of 5%.]]></description>
<pubDate>2017/3/7 11:55:45</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Bingwen, ZHENG Jian and XIONG Chao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Bingwen, ZHENG Jian and XIONG Chao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201701027]]></guid><cfi:id>50</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Information diffusion extended model and stability based on escape-quarantined mechanism]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201806017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to meet the complexity and uncertainty of virus diffusion in cyberspace operation, escape status and quarantined status were introduced into the virus diffusion model based on a traditional diffusion model, and its stability was discussed. The escape and quarantined mechanism of cyberspace operation was introduced. Via Routh stability criterion, the local stability of system equilibrium point was demonstrated as well as the basic reproductive number R0. Simulations were given to illustrate the influence of node connectivity, node distribution density, and node contact ratio on information diffusion. The results show that the information diffusion can be effectively controlled by changing the parameter regulations on node connectivity, node distribution density, and node contact ratio.]]></description>
<pubDate>2019/1/17 15:43:46</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Gang<sup>1</sup>, HU Xin<sup>1,2</sup>, LU Shiwei<sup>1</sup> and MA Runnian<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Gang<sup>1</sup>, HU Xin<sup>1,2</sup>, LU Shiwei<sup>1</sup> and MA Runnian<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201806017]]></guid><cfi:id>49</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Imaging optimization strategy for stratospheric airship synthetic aperture radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201805011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The stratospheric airship has the potential as large observation area, long drift time, and better efficiency. It is expected in many different applications, such as reconnaissance and surveillance. The imaging difference between the stratospheric airship SAR (synthetic aperture radar) and the airplane SAR was compared. Aimed at the redundant pulse repetition frequency and the large-amplitude low-frequency trajectory deviation, an optimization scheme was proposed and verified by simulation. The simulation result shows that the proposed optimized motion compensation method can eliminate the influence of motion error for the stratospheric airship effectively.]]></description>
<pubDate>2018/11/15 16:12:22</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[JIA Gaowei and YANG Xixiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIA Gaowei and YANG Xixiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201805011]]></guid><cfi:id>48</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Mapping heuristics of network security testbed based on K-partition]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201805017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The network security testbed mapping problem was formally defined and a new mapping heuristics based on K -partition was presented. The insight of the heuristic is that the tightly connected nodes of the logic topology should be mapped in the same switch in order to save more network resources. This novel mapping determines the initial state by greedy method, and moves nodes according to the defined cost function. The iteration partition of subgraph is in progress until that the number of subgraph nodes is not more than the port capacity of the physical switch. The problem that the result is influenced by the random initial partition in K-L partition is resolved by the K -partition mapping heuristics. The experiment result shows that the runtime is far less than the genetic algorithm, and the proposed algorithm can find near-optimal solutions in shorter period.]]></description>
<pubDate>2019/1/21 16:09:52</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Huimei<sup>1</sup>, LIU Jian<sup>1</sup>, RONG Hong<sup>1</sup>, OUYANG Hongjun<sup>2</sup> and XIAN Ming<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Huimei<sup>1</sup>, LIU Jian<sup>1</sup>, RONG Hong<sup>1</sup>, OUYANG Hongjun<sup>2</sup> and XIAN Ming<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201805017]]></guid><cfi:id>47</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Distributed wearable individual soldier combat information system for low-latency business]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201804024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aimed at the problem of high processing delay and low quality of services of  cloud computing in individual soldier combat system, a distributed individual soldier combat information system supported by wearable technology was proposed. A local computing layer was constructed by using the intelligent equipment of the soldier, which can provide a platform for battlefield data processing at the nearest combat place and supply soldier with the ability of information fusion and processing. The generalized diffusion load balancing algorithm was used to balance the load of equipment for reducing the delay of business processing and the reliability of the system was enhanced by the distributed computing in realistic battlefield environment. The simulation results show that the distributed wearable local network architecture can effectively reduce the processing delay and enhance the reliability of the combat system.]]></description>
<pubDate>2018/9/17 11:14:36</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[REN Zhiyuan<sup>1</sup>, XIAO Yao<sup>1</sup>, GUO Kai<sup>2</sup>, CHENG Wenchi<sup>1</sup> and ZHANG Hailin<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>REN Zhiyuan<sup>1</sup>, XIAO Yao<sup>1</sup>, GUO Kai<sup>2</sup>, CHENG Wenchi<sup>1</sup> and ZHANG Hailin<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201804024]]></guid><cfi:id>46</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Detection for unresolved targets by using complex monopulse ratio on planar array radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201803012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For the detection of unresolved targets on the planar array radar, a rectangle array was taken as example to analyze the statistical distribution of imaginary of complex monopulse ratios in azimuth and elevation firstly. The detection model was given for planar array and an ellipse decision domain for the imaginary part of the monopulse ratios was set according to the constant false alarm theory. Besides, the real part of the monopulse ratios was used to assist the decision. By combining the two decisions, the detection algorithm for unresolved targets based on complex monopulse ratio was proposed. Simulation results based on the rectangle array for two targets demonstrate that the proposed algorithm performs well in the conditions of high signal to noise ratio, wide angle separate and suitable complex amplitude ratio.]]></description>
<pubDate>2018/7/11 12:40:21</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Luoshengbin, XU Zhenhai, LIU Xinghua and WANG Guoyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Luoshengbin, XU Zhenhai, LIU Xinghua and WANG Guoyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201803012]]></guid><cfi:id>45</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Extremely low frequency magnetic fields in air produced by timeharmonic horizontal electric dipole in shallow sea]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201803013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to analyze the ELF(extremely low frequency) magnetic field of ships, the corrosion related current modulated by the ship shaft was equivalent to a timeharmonic HED (horizontal electric dipole). Based on Maxwell′s equations and boundary conditions of electromagnetic field, the magnetic vector potential in air was modeled, and then the magnetic field expressions of the HED were deduced. The propagation character of the magnetic field was calculated by fast Hankel transform. The magnetic field of carbon electrodes in the pool and Tibased electrodes at sea were measured. Result shows the practicality of the magnetic field and the validity of the model.]]></description>
<pubDate>2018/7/11 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SUN Yuhui<sup>1,2</sup>, LIN Chunsheng<sup>1</sup>, WU Haibing<sup>2</sup> and ZHAI Guojun<sup>3,4</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SUN Yuhui<sup>1,2</sup>, LIN Chunsheng<sup>1</sup>, WU Haibing<sup>2</sup> and ZHAI Guojun<sup>3,4</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201803013]]></guid><cfi:id>44</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Effect of satellite-earth non-ideal channel analysis on code tracking bias]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201803014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The equivalent problem of the code tracking bias introduced by generalized joint channel and the overlaying value of each part of the channel were researched. The influence of the code tracking bias caused by the channel characteristics of satellite-ground joint channel and each part of the channel was studied. The possible causes of pseudorange layered in the actual channel were analyzed. The nonideal characteristics of the channel affected the tracking performance of the navigation signal. The pseudo code tracking function and channel characteristics were modeled the non-ideal characteristics of both the satellite channel and the receiver channel were considered. The influence of different channel characteristics on code tracking bias was analyzed. Simulation verification was carried out with a software receiver. By analyzing the influence of several typical channels on pseudorange error, this research explains the causes of pseudorange layered phenomenon in the double-difference observation of zero-base line. Test results in practical channels prove the correctness of the analysis model. The model and analysis method can be used to explain signal quality problems and guide the optimal design of receiver channel.]]></description>
<pubDate>2018/7/11 12:40:21</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XIAO Wei, LI Baiyu, LIU Wenxiang and SUN Guangfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIAO Wei, LI Baiyu, LIU Wenxiang and SUN Guangfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201803014]]></guid><cfi:id>43</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Inverse synthetic aperture radar imaging via covariance compressive sensing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201803015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to solve the problem of low SNR(signal to noise ratio) radar imaging under short observation time, a compressive sensing inverse synthetic aperture radar imaging technique based on echo covariance matrix processing was proposed. The method constructs the compressive sensing problem model under the echo covariance matrix, and reduces the influence of noise on the imaging results through a specific linear transformation. By processing the simulated echo data under the condition of short observation time and low SNR, the method obtained target imaging results with higher quality and higher contrast than the traditional compressive sensing method. In the simulation experiment, the target background ratio and the background noise energy of the imaging results are better than the traditional methods, which verifies the validity of the method.]]></description>
<pubDate>2018/7/11 12:40:21</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[QIAN Weiping<sup>1</sup>, YU Hanchen<sup>1,2</sup> and ZHANG Yan<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>QIAN Weiping<sup>1</sup>, YU Hanchen<sup>1,2</sup> and ZHANG Yan<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201803015]]></guid><cfi:id>42</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Multiple sound source localization and counting algorithm based on angular spectrum under noisy and reverberant environment]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201803018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For multiple sound source localization and counting under noisy and reverberant environment, two modules, local signal-to-noise ratio tracking and coherence test, were introduced to extract the time-frequency bins less affected by noise and mutual interference of the sound sources in classical generalized cross-correlation angular spectrum; then the traditional peak search method was replaced by the dual-width matching pursuit to improve the following localization and counting accuracy. Through the simulation results, the proposed algorithm of multiple sound source localization and counting using both the filtered angular spectrum and dualwidth matching pursuit method is proved to be more accurate and robust than the traditional one, especially under the environment with lower signaltonoise ratio, stronger reverberation and more sound sources.]]></description>
<pubDate>2018/7/11 12:40:21</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[FANG Yuzhuo, XU Zhiyong and ZHAO Zhao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FANG Yuzhuo, XU Zhiyong and ZHAO Zhao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201803018]]></guid><cfi:id>41</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Imaging algorithm based on space-time coding at high squint angles]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201802011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Space-time coding techniques are used to mitigate cross-correlation in the multiple-input multipleoutput radar. However, the imaging algorithms based on the conventional space-time coding schemes cannot accurately compensate the range-azimuth coupling, which limits the ability to handle the radar data acquired at high squint angles. To avoid the above drawback, a space-time coding scheme combined with ωK algorithm was proposed. In the space-time decoding processing, the modified decoding matrix and Stolt mapping operation were introduced to achieve the bulk focusing and differential focusing simultaneously, and the range-azimuth coupling could be accurately compensated. Theoretical analysis and simulation results show that the high quality imaging in the case of high squint angles can be achieved by the proposed scheme, and the cross-correlation interference can be canceled.]]></description>
<pubDate>2018/5/11 16:33:57</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[QIN Lilong<sup>1</sup>, WU Manqing<sup>2</sup>, WANG Peng<sup>3</sup> and DONG Zhen<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>QIN Lilong<sup>1</sup>, WU Manqing<sup>2</sup>, WANG Peng<sup>3</sup> and DONG Zhen<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201802011]]></guid><cfi:id>40</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of impacton sliding spotlight SAR step steering scan]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201802012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Antenna beam steering along azimuth of sliding spotlight SAR(synthetic aperture radar) system was accomplished by step steering scan in practical operation. However, this scanning method may cause the paired-echo in the image of sliding spotlight SAR. To analyze the reason of pairedecho, the step steering scan model of sliding spotlight SAR was established. And the relationship in quantitatively between beam stepped steering and both amplitude and position of paired-echo by Tyler series expanding and Fourier series were calculated out. The theory analysis and signal simulation indicate that the model demonstrates the phenomenon well, and the model provides the theory basis for the design of the sliding spotlight SAR beam steering scan parameters.]]></description>
<pubDate>2018/5/11 16:33:57</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YI Tianzhu<sup>1</sup>, HE Feng<sup>1</sup>, HE Zhihua<sup>1</sup>, CHEN Shaojin<sup>2</sup>, DONG Zhen<sup>1</sup> and WU Manqing<sup>3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YI Tianzhu<sup>1</sup>, HE Feng<sup>1</sup>, HE Zhihua<sup>1</sup>, CHEN Shaojin<sup>2</sup>, DONG Zhen<sup>1</sup> and WU Manqing<sup>3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201802012]]></guid><cfi:id>39</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Fast time-domain imaging algorithm for circular synthetic aperture radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201802013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to make the process of CSAR (circular synthetic aperture radar) imaging more efficient, a fast time-domain CSAR imaging method was presented. The proposed method was based on the circular aperture of the CSAR model, and the full aperture was divided into several sub-apertures; those sub-apertures were processed by the fast factorized back projection algorithm to get their corresponding sub-images; the final focused image was obtained by the coherent interpolation of the sub-images from the polar coordinate to the global coordinate system. Some key problems in the algorithm realization, such as coordinate transformation, error control and computation efficiency, were analyzed in detail. Experiments results based on the simulated data and real data were given to prove the validity of the proposed method. The proposed method has the advantages of improving imaging extension and lowering computational complexity.]]></description>
<pubDate>2018/5/11 16:33:57</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Leping, AN Daoxiang and HUANG Xiaotao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Leping, AN Daoxiang and HUANG Xiaotao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201802013]]></guid><cfi:id>38</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Multi-channel MAC transmission mechanism based on dynamic QoS]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201802024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the QoS(quality of service) and delay problems of aeronautic Ad Hoc network under high load, a DQM transmission mechanism was proposed(dynamic QoS of multi-channel MAC). On the basis of multi-channel detection statistics and the priority mechanism, the DQM optimized the network traffic via shutting down the low-priority traffic in the high-load network timely to ensure the low-latency transmission of high-priority traffic. The traffic prediction model was used to estimate the network traffic. Combined the particle swarm optimization algorithm, the DQM could find the optimal priority threshold and guarantee the access rate of highpriority services. Simulation results prove that the DQM maintains an optimized network traffic by adaptively controlling channel access in high-load network. Thus, the access rate of high-priority services reaches above 99%, which helps to solve the QoS and latency issues associated with high traffic in the air data link.]]></description>
<pubDate>2018/5/11 16:33:58</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[YUAN Yuan<sup>1,2</sup>, CAO Xianbin<sup>1</sup> and FAN Meimei<sup>3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YUAN Yuan<sup>1,2</sup>, CAO Xianbin<sup>1</sup> and FAN Meimei<sup>3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201802024]]></guid><cfi:id>37</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Electronic counter-countermeasures scheme for smart noise jamming using orthogonal diversity]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201801016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In response to the smart noise jamming under multi-channel broadband digital radio frequency memory repeater jammer, an orthogonal decomposition method for anti-jamming was put forward on basis of chaotic modulation signals and multiharmonic phase modulation chirp signals. Both of these two signals have a ″thumbtack″ ambiguity function. They are not only of good resolving power in range and Doppler, but also of good sensitivity to echo frequency. By an orthogonal and diverse design, they can better adapt to the smart noise jamming under multi-channel broadband digital radio frequency memory repeater jammer. The result of analysis and validation on the anti-jamming performance of the new method through computer simulation shows that under smart noise jamming in multi-channel broadband digital radio frequency memory jammer, the electronic counter-countermeasures improvement factor of the new method can be more than 10 dB, which is much better than that of the traditional frequency and slope agility method.]]></description>
<pubDate>2018/3/23 11:05:20</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Wendong<sup>1,2</sup>, HE Zhiyi<sup>1</sup> and YAN Yaqiong<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Wendong<sup>1,2</sup>, HE Zhiyi<sup>1</sup> and YAN Yaqiong<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201801016]]></guid><cfi:id>36</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Multi-domain joint evaluation method for RF stealth performance of airborne avionics system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201801018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[According to the characteristics of the airborne avionics system, a method for evaluating the RF(radio frequency) stealth performance of the airborne avionics system was presented. The factors that influence the performance of the airborne avionics system in the polarization domain, wave domain and energy domain were analyzed, the RF stealth index of the waveform domain, polarization domain and the energy domain were constructed, an RF stealth evaluation method of the traditional “radiation reception” model was broken. And a quantitative evaluation method of radio frequency stealth based on the working state and working parameters of airborne avionics system was established. Finally, a simulation evaluation of airborne radar system was carried out. Results show that the proposed method can correctly reflect the RF stealth performance of airborne radar system.]]></description>
<pubDate>2018/3/23 11:05:20</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Qianzhe<sup>1</sup>, HE Zhaoyang<sup>1</sup>, SONG Bowen<sup>2</sup>, WANG Jinjiang<sup>1</sup>, REN Baoxiang<sup>1</sup> and LI Huanyu<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Qianzhe<sup>1</sup>, HE Zhaoyang<sup>1</sup>, SONG Bowen<sup>2</sup>, WANG Jinjiang<sup>1</sup>, REN Baoxiang<sup>1</sup> and LI Huanyu<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201801018]]></guid><cfi:id>35</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Stochastic modeling strategy for BDS hybrid constellation in relative positioning]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201905007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to improve the integer ambiguity resolution successrate and the baseline precision, a strategy of stochastic modeling for precise relative positioning aimed at hybrid constellation BDS was proposed, namely the hybrid stochastic modeling strategy. In the new strategy, variances of singledifference observations were estimated with the leastsquares variance component estimation. After that, the observation variances of different orbits satellites were fitted with different models, carriertonoise ratios dependent model was used to fit the observation variances of geostationary earth orbit satellites, and two individual elevationdependent models were used to fit observation variances of inclined geosynchronous satellite orbit and medium earth orbit satellites. Then the stochastic model of observation model was constructed in real time with these different fitted models. The experimental results reveal that, when compared with the traditional, simplified model and the sole elevation or carriertonoise ratios model, the proposed hybrid stochastic model is more realistic in reflecting the noise property of observations of different orbits satellites. And it has an overall better performance in integer ambiguity resolution success rates and relative positioning precision. Hence, the hybrid stochastic model is more suitable for BDS in high precision positioning applications.]]></description>
<pubDate>2019/9/30 15:58:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Shaoshi<sup>1</sup>, ZHAO Xiubin<sup>1</sup>, PANG Chunlei<sup>1</sup>, ZHANG Liang<sup>1</sup> and LIU Yadong<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Shaoshi<sup>1</sup>, ZHAO Xiubin<sup>1</sup>, PANG Chunlei<sup>1</sup>, ZHANG Liang<sup>1</sup> and LIU Yadong<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201905007]]></guid><cfi:id>34</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Photonic generation of linearly chirped microwave signal with high frequency and large bandwidth via frequency and bandwidth multiplication]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201905020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the requirement of generating the linearly chirped microwave signal with high frequency and large bandwidth, an approach based on cascaded MZM (Mach-Zehnder modulator) to generate linearly chirped microwave signal with highfrequency and large-bandwidth via frequency and bandwidth multiplication was proposed. From the theoretical analysis, the linearly chirped microwave signal with variable multiplication factor of the carrier frequency and bandwidth was generated by properly adjusting the direct current bias points and the modulation index of the cascaded MZM. On the basis of this, the corresponding simulations were performed on the optical system software platform. The linearly chirped microwave signals with the carrier frequency and bandwidth of 40 GHz, 15.07 GHz and 58.25 GHz or 19.5 GHz were generated from a 5 GHz or 2 GHz linearly chirped drive signal respectively. The simulation results verify the feasibility of the proposed approach and the superior compression of the generated signal.]]></description>
<pubDate>2019/9/30 15:58:01</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CONG Wenshan, YU Lan, WO Jianghai, WANG Yalan and WANG Anle]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CONG Wenshan, YU Lan, WO Jianghai, WANG Yalan and WANG Anle</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201905020]]></guid><cfi:id>33</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design of search coil magnetic antenna and research on interference suppression algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201905021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[When the desired signal and the interference are in the same direction, in order to improve the communication quality in the ELF (extremely-low-frequency) communication effectively, a kind of interference suppression algorithm based on analog circuits preprocessing and improved GSC (generalized sidelobe cancellation) algorithm was proposed. The magnetic antennas and preamplifier circuits with lower noise were designed, and the magnetic sensor with high sensitivity was produced, which can suppress 50Hz interference and its harmonic components effectively. In view of the weak desired signal in ELF communication, on the basis of the GSC algorithm, several improvements have been made to provide more reference information about interference for the main channel, which can improve the original GSC algorithm′s performance furtherly and address the problem of the traditional algorithm effectively. In order to validate the effectiveness of the proposed algorithm, an experimental platform was set up under the laboratory environment and multiple sets of controlled experiments were performed. Experimental results show that the improved GSC algorithm is better for the improvement of SNR and the noise floor, compared  with the original GSC algorithm, regardless of whether the desired signal and the interference are in the same direction.]]></description>
<pubDate>2019/9/30 15:58:01</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Chunteng<sup>1</sup>, JIANG Yuzhong<sup>1</sup>, LIU Fangjun<sup>2</sup>, ZHAO Peng<sup>1</sup> and LI Songlin<sup>3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Chunteng<sup>1</sup>, JIANG Yuzhong<sup>1</sup>, LIU Fangjun<sup>2</sup>, ZHAO Peng<sup>1</sup> and LI Songlin<sup>3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201905021]]></guid><cfi:id>32</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modulation recognition of MPSK signals based on deep learning]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201905022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to realize the intelligent identification of signals modulation effectively, a novel modulation recognition method of MPSK(multiple phase shift keying）signals based on deep learning was proposed. The cycle spectrum of the MPSK signals were analyzed firstly, and the two-dimensional features information were obtained by extracting the contour map of the MPSK signals cyclic spectrum. Then, the two-dimensional features were trained by using the convolution neural network of deep learning. Finally, the effectiveness of the proposed modulation recognition method was verified by the test samples. The simulation results show that the proposed method has good recognition performance.]]></description>
<pubDate>2019/9/30 15:58:01</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Mingqian<sup>1,2</sup>, ZHENG Shifei<sup>1,2</sup> and LI Bingbing<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Mingqian<sup>1,2</sup>, ZHENG Shifei<sup>1,2</sup> and LI Bingbing<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201905022]]></guid><cfi:id>31</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Optimization design of short wave broadband whip antenna loaded with radiation lobes]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201905023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new type of whip antenna with multilayer radiation lobes structure was introduced. By setting up different numbers in parameters like radiation lobe layer number, radius, length, branch number, elevation angle and distribution of radiation lobe on the body of the 10 meters whip antenna, the research of their influences on antenna radiation performance were launched to choose the most suitable structure for whip antenna. The double loading and the broadband matching network for the antenna were designed and optimized, whose simulation results show that the gain and efficiency, compared with the existing broadband whip antenna, are greatly improved, the maximum growth of gain and efficiency are 3 dB and 5% covering the low frequency, which are 5 dB and 35% covering the high frequency,the warping of the pattern is also restrained to a certain extent，so a new structural design method is provided here to improve the existing broadband whip antenna.]]></description>
<pubDate>2019/9/30 15:58:01</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Hengfeng, LIU Chao, XIE Xu and WU Huaning]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Hengfeng, LIU Chao, XIE Xu and WU Huaning</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201905023]]></guid><cfi:id>30</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modeling and optimization of Ethernet topology of electromagnetic launch system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201904002]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The optimization model of topology is a kind of important model in network, which can effectively optimize the overall link performance of the system. In Ethernet topology of electromagnetic launch system, some nodes and links are overloaded, once the blockage occurred, the performance of the key links in the network can be affected. To solve this problem, a multi-objective programming model for optimizing Ethernet topology was established and the genetic algorithm based on genetic ring operation was designed to solve the model. The simulation was carried out to obtain the optimal Ethernet topology. Default parameters of corresponding network nodes in the practical system were modified through simulation and calculation. The result shows that the model and the algorithm can effectively balance load, reduce conflict rate and optimize the topology without changing the physical link by adding cost, which is of universal significance to electromagnetic launch system.]]></description>
<pubDate>2019/7/18 15:28:47</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LU Yao, ZHANG Xiao, JIANG Hanhong, WU You and XU Yinan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Yao, ZHANG Xiao, JIANG Hanhong, WU You and XU Yinan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201904002]]></guid><cfi:id>29</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Induced spoofing detection of global navigation satellite system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201904019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[With the wide applications of the global navigation satellite system, the security problem of it has gradually become the focus of attention. In order to detect the induced spoofing, the most covert spoofing technology for satellite navigation systems, a combo-signal model which processes two satellite navigation signals simultaneously was proposed. Based on this signal-processing model, a method to detect induced spoofing signals was proposed. Then the detection threshold of the method was analyzed. An experiment with the BeiDou B1I and B1C signals and a software receiver implementing this combo-signal model was used to verify this method. The experimental results show that this method can effectively detect the induced spoofing. The statistics of the detection probability are consistent with the analysis.]]></description>
<pubDate>2019/7/18 15:28:49</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHOU Meng, LI Hong, WANG Chuhan, MA Tianyi and LU Mingquan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Meng, LI Hong, WANG Chuhan, MA Tianyi and LU Mingquan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201904019]]></guid><cfi:id>28</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design technique of GNSS unambiguous and anti-multipath code correlation reference waveform]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201904020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the code delay lock loop of GNSS receiver, the false-lock problem of binary offset carrier signal was caused by its multi-peak characteristic for the present multipath mitigation technique. An optimal discriminator curve design technique was proposed by using the least squares method combined with the truncated singular value decomposition. As a result, the local code correlation reference waveforms which have no ambiguity points in tracking the BOC signals can be derived. The simulation results show that the proposed method can realize coherent and non-coherent binary offset carrier signal discriminators without false lock points. Generally, there is a performance degradation in the tracking jitter. However, there are performance promotions for the BOC(1,1) signal, which has a 8.184 MHz front-bandwidth, with 61.8% increase in the multipath error envelope area, and 4 to 5 dB increase in the tracking precision compared with W2 waveform. Thus, the selection of waveform parameters involves a trade-off between the tracking ambiguity and tracking performances obtained under multipath and thermal noise conditions.]]></description>
<pubDate>2019/7/18 15:28:49</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Chengtao<sup>1</sup>, LIU Zhe<sup>2</sup> and XIE Yuchen<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Chengtao<sup>1</sup>, LIU Zhe<sup>2</sup> and XIE Yuchen<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201904020]]></guid><cfi:id>27</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Cluster-merge method for the Gaussian mixture components based on the similarity distribution criterion]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201904022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To solve the problem of the exponential growth of the Gaussian mixture components for estimating the state of the non-Gaussian system with the Gaussian mixture model, a cluster-fusion algorithm based on the similarity distribution criterion was proposed. According to that criterion, the Gaussian components were then clustered into different Gauss clusters based on the optimal confidence interval, derived by minimizing the extended integral square error cost function. Meanwhile, to avoid the reuse of the cross components, the local nearest neighbor approach was introduced to re-allocate these cross ones. Then, the components in the clusters were merged by the multielement mergence method to keep with the unbiased property, which can decrease the number of the mixture components sharply. The results show that the proposed algorithm can not only reduce the running time, but also guarantee the tracking performance with a proper confidence interval.]]></description>
<pubDate>2019/7/18 15:28:49</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XU Yang, FANG Yangwang, WU Youli and ZHANG Danxu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Yang, FANG Yangwang, WU Youli and ZHANG Danxu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201904022]]></guid><cfi:id>26</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Parameters selection of stationary wavelet denoising algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201904023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For studying how to select the algorithm parameters, which are wavelet basis, wavelet coefficient processing method and threshold calculation method respectively, in stationary wavelet denoising algorithm to obtain the optimal denoising performance. The denoising performance under different parameters, the selection of orthogonal filter banks and the wavelet coefficients processing method in stationary wavelet denoising algorithm were proposed and compared. The results show that: compared with other filter banks, the filter bank corresponded to Daubechies wavelet basis can achieve a better denoising performance; the soft thresholding method should be selected for processing wavelet coefficient in low signal noise ratio condition, and the hard thresholding method should be utilized when signal noise ratio is high; when using the thresholding method to process the wavelet coefficients, the threshold value should be calculated by the sqtwolog method in low signal noise ratio condition, and rigrsure method should be adopted when the signal noise ratio is high.]]></description>
<pubDate>2019/7/18 15:28:49</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Heng<sup>1</sup> and PAN Zhongming<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Heng<sup>1</sup> and PAN Zhongming<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201904023]]></guid><cfi:id>25</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Angular estimation of group targets using adaptive multi-null monopulse for array radar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903001]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The adaptive multi-null monopulse principle of phased array radar， derived from the maximum likelihood estimation,  was introduced. It was found that the failure of double-null monopulse technique in multiple group targets was caused by a large iteration step. In order to optimize the iteration in angular estimation, a method of weighted step was proposed. By the proposed method, an accurate angular estimation of multiple group targets was achieved with a few computations. Several simulation results demonstrate that the angular estimation error of three targets is about 0.15 beamwidth in medium signal to noise ratio. However, the performance will get worse when there are a large number of group targets or the phase offset of echoes is closed to 0.]]></description>
<pubDate>2019/6/13 15:22:18</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Luoshengbin, XU Zhenhai, LIU Xinghua, DONG Wei and WANG Guoyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Luoshengbin, XU Zhenhai, LIU Xinghua, DONG Wei and WANG Guoyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903001]]></guid><cfi:id>24</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Algorithm and performance analysis of the new almanac of BDS civil navigation message]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903002]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The differences between the two kinds of almanac in the new BDS civil navigation message and the navigation message of BeiDou-2 were analyzed, and the influence of various almanacs on the initial positioning time of the receiver was analyzed. Based on the actual data of almanac, the user algorithms of different almanac types were compared, and the influence of different age data on the initial positioning performance of receivers was analyzed. The results show that the performance of the precise ephemeris with a week of data is more stable, and the accuracy of medium accuracy almanac is lower than the accuracy of the precise ephemeris, but the performance can close to that of the precise ephemeris as a result of simplifying the message space. The contracted almanac further simplifies the parameter number and message space, although the location error achieved hundreds of kilometers, but can keep the corresponding precision after a few months, and shorten the initial positioning time of the receiver.]]></description>
<pubDate>2019/6/13 15:22:18</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XIAO Wei<sup>1</sup>, LIU Wenxiang<sup>1</sup>, ZUO Yong<sup>1</sup>, WANG Mengli<sup>2</sup> and SUN Guangfu<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIAO Wei<sup>1</sup>, LIU Wenxiang<sup>1</sup>, ZUO Yong<sup>1</sup>, WANG Mengli<sup>2</sup> and SUN Guangfu<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903002]]></guid><cfi:id>23</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Generation mechanism and mitigation method of jam between subcarriers of BDS RDSS signals of new modulation structure]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to increase the message volume in limited bandwidth for new generation BDS（BeiDou navigation satellite system） RDSS(radio determination satellite service), the signal was modulated on multi-subcarriers inferring to orthogonal frequency division multiplexing. Modulation on multi-subcarriers was rarely used in navigation systems. Corresponding analysis mainly focuses on multiple access affection, and loss caused by carrier frequency offset and code phase offset were analyzed separately. It is not considered that when using the same synchronization head, the signals on other subcarriers can cause high correlation peak for the observed subcarrier. This may affect the receiving of signals. The mechanism is analyzed and two correlation mitigation methods are supplied, which offers certain guidance for the design of the follow-up system.]]></description>
<pubDate>2019/6/13 15:22:18</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WANG Lei, CHEN Huaming, TANG Xiaomei, LI Jingyuan and WANG Feixue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Lei, CHEN Huaming, TANG Xiaomei, LI Jingyuan and WANG Feixue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903003]]></guid><cfi:id>22</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Low probability of intercept signal separation method using discriminative amplitude-phase dictionary learning]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903004]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to solve the shortcomings of signal separation methods based on the dictionary learning in phase information loss and cross representation, a signal separation algorithm based on the discriminative amplitude-phase dictionary learning was proposed. In discriminative amplitude-phase dictionary learning method, a model of amplitude-phase dictionary was proposed to solve the problem of phase information loss. Meanwhile, based on the idea of discriminative dictionary learning, a penalty term of cross representation was added into the object function of dictionary learning to solve the problem of cross representation, which happens to the mixed signal projected in joint dictionary. Experiment results show that the amplitude and phase information of low probability of intercept signals can be fully represented by amplitude-phase dictionaries. Meanwhile, the proposed penalty term within discriminative amplitudephase dictionary learning algorithm can profitably restrain the cross representation between signals and the proposed algorithm has a significant performance in signal separation.]]></description>
<pubDate>2019/6/13 15:22:18</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN You<sup>1</sup>, ZHOU Yipeng<sup>1</sup>, WANG Xing<sup>1</sup>, TIAN Yuanrong<sup>2</sup> and ZHOU Dongqing<sup>3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN You<sup>1</sup>, ZHOU Yipeng<sup>1</sup>, WANG Xing<sup>1</sup>, TIAN Yuanrong<sup>2</sup> and ZHOU Dongqing<sup>3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903004]]></guid><cfi:id>21</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Access control method for device-to-device communications based on stochastic geometry]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903005]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to solve the problem of the interference management in D2D(device-to-device) underlaid cellular networks, a new design of stochastic geometry based access control for D2D communications was proposed. Based on the stochastic process theory and the stochastic geometry tool, the cellular services′ access failure probability expression was derived to determine the impact from other-cell base stations and D2D communications on the cellular communication. Given the constraint of access failure probability, the maximum D2D transmitters density was calculated according to the expression. As a result, the base stations realized the access control for D2D users and guaranteed the access failure probability of cellular services. The calculated access failure probability of cellular services was validated by extensive simulations. The simulation results verify that the estimation result from the proposed numerical calculation is consistent with the Monte Carlo simulation result, and the cellular services′ access failure probability requirement can be satisfied by limiting the density and the transmission power of D2D transmitters.]]></description>
<pubDate>2019/6/13 15:22:18</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[SUN Peng<sup>1</sup>, CHEN Yongwei<sup>1</sup>, ZHOU Nianguang<sup>1</sup>, WU Xiaoping<sup>2</sup> and ZHANG Li<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SUN Peng<sup>1</sup>, CHEN Yongwei<sup>1</sup>, ZHOU Nianguang<sup>1</sup>, WU Xiaoping<sup>2</sup> and ZHANG Li<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903005]]></guid><cfi:id>20</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Blind jamming cancellation and signal recovery technique using tensor method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To achieve the blind jamming cancellation and signal recovery under MIMO(multiple-input multiple-output) system with intended jamming attacks,  a structure of dual-array-antenna receiver was proposed to achieve the blind jamming cancellation without the consideration of the correlation between jamming and the transmitted signal. Data free of jamming have an obvious characteristic of tensor slice. They were stacked into a 3-order tensor and then the CP decomposition was performed to recover the original signal directly without channel estimation. Compared with the traditional method based on channel estimation, the tensor-based algorithm can avoid the error caused by channel estimation, which can largely improve the recovery precision. Simulation results show that the tensorbased method achieves better recovery performance with less training overhead than the traditional training sequence based channel estimation method.]]></description>
<pubDate>2019/6/13 15:22:18</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[CHEN Zhi<sup>1,2</sup>, LU Yao<sup>1</sup>, FANG Jun<sup>1</sup> and GUO Yantao<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Zhi<sup>1,2</sup>, LU Yao<sup>1</sup>, FANG Jun<sup>1</sup> and GUO Yantao<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903006]]></guid><cfi:id>19</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Image registration algorithm with hypergraph constraint and improved normalized cross correlation method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to improve the accuracy and adaptability of image registration algorithm, the hypergraph constraint and the improved NCC(normalized cross correlation) were applied to image registration. The proposed algorithm used the HessianAffine detection affine invariant region instead of the fixed window to improve the NCC method and obtained the initial matching point pairs. The similarity degrees between the hyperedges of hypergraph were calculated by Martensitic distance, and the matching scores of the matching pairs calculated by hypergraph constraint were used to sort the matching pairs. The transformation matrix was initialized with some matching points of higher matching scores, and was circularly updated by filtering matching pairs to get the optimal transformation matrix, which was used to implement registration. Experimental results show that the proposed method has better performance in matching and rejecting mismatch, and it also has better registration performance in different types of image registration.]]></description>
<pubDate>2019/6/13 15:22:18</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHU Ming<sup>1,2</sup>, YAO Qiang<sup>1</sup>, TANG Jun<sup>1</sup> and ZHANG Yan<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHU Ming<sup>1,2</sup>, YAO Qiang<sup>1</sup>, TANG Jun<sup>1</sup> and ZHANG Yan<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903009]]></guid><cfi:id>18</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of the influence on zero value in receivers under I/Q amplitude and phase imbalance with new structure navigation signals]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201901010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Since the bandwidth of modernized navigation signal is increasing, the advantages of complex signal sampling have a raising benefit by substantially reducing the sampling rate. Because of the I/Q amplitude and phase response imbalance, the complex signal sampling may introduce error to the pseudo range measurement in the navigation receivers. The analysis model explaining the influence of the non-ideal characteristic of signal channel, I/Q amplitude and phase response imbalance on the zero value measurement in BPSK/QPSK navigation receivers were improved. Based on the model, the pseudo range zero value of BOC signal affected by I/Q imbalance and the nonideal characteristic of signal channel was derived. The zero value shift caused by the two factors in the frequency domain anti-jamming processing was discussed. The proposed theoretical analysis is highly close to the simulation result in software receivers, where the error is within 1.5×10<sup>-4</sup> chip. This result proves the accuracy of the analysis model. The proposed analysis method can be used to provide prior constraint for features of analog channel in high performance navigation receivers, which can meet the requirement of the zero value change in the jamming scenario.]]></description>
<pubDate>2019/3/15 11:33:33</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Baiyu, TANG Xiaomei, WANG Yaoding and LIU Zhe]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Baiyu, TANG Xiaomei, WANG Yaoding and LIU Zhe</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201901010]]></guid><cfi:id>17</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A searched-form robust Chinese remainder theorem based multibaseline phase unwrapping algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201901011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The performance of the multibaseline phase unwrapping is directly related to noise level. For instance, the presence of phase noise makes the phase unwrapping method based on the classical Chinese remainder theorem unrobust enough and inapplicable in practical cases. So a method based on a SR-CRT (searchedform robust Chinese remainder theorem) was presented, and the common factor was carried out to build the new system of simultaneous congruence in the method. Theoretical analysis and experimental results prove the effectiveness of the SR-CRT method and demonstrate that selecting reasonable common factor can improve the noise robustness of the SR-CRT method.]]></description>
<pubDate>2019/3/15 11:33:33</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[JIANG Zhibiao, WANG Jian, SONG Qian and ZHOU Zhimin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIANG Zhibiao, WANG Jian, SONG Qian and ZHOU Zhimin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201901011]]></guid><cfi:id>16</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Forcing frequency′s influence on blind detection of weak binary phase shift keying signal by using Duffing oscillators]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201901012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[There are transition zones in the transitions between the chaotic and periodic states while blindly detecting weak BPSK (binary phase shift keying) signal by using Dufffing oscillator. The relationship expression between transition zone time length and forcing frequency of Duffing system was deduced, and the conclusion that higher forcing frequency leads to shorter transition zone time length was drawn. The simulation experiment gave the time-frequency response curve. The detection sensitivity of Duffing system will lower with the increasing of forcing frequency. The equations of output amplitude  as dependent variable and the internal frequency as argument were deduced while Duffing system was in periodic state. The simulation experiment gave the amplitude-frequency response curve. Finally, by using S transform to extract the envelope of Duffing system output, the blind detection model of weak BPSK signal with the scale transformation method combined and the detection array was built. The simulation experiment results show the efficiency of the blind detection model.]]></description>
<pubDate>2019/3/15 11:33:34</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Yanhua and MA Qingli]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Yanhua and MA Qingli</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201901012]]></guid><cfi:id>15</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Feature extraction and classification of ship radiated noise based on VMD and SVM]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201901013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to solve the problem that the feature extraction of ship radiated noise in complex ocean environment is difficult, a method for feature extraction and classification of ship radiated noise based on variational mode decomposition, center frequency, complexity and support vector machine was presented. Four kinds of ship radiated noise signals were decomposed into several intrinsic mode functions with variational mode decomposition. In comparison, the center frequency and permutation entropy of intrinsic mode function with the maximum energy were taken as the characteristic parameters. The characteristic parameters acted as the input of support vector machine to distinguish the four kinds of ship. Results show that this method can realize the feature extraction of ship radiated noise, and it has higher recognition rate than the existing methods.]]></description>
<pubDate>2019/3/15 11:33:34</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Yuxing, LI Yaan, CHEN Xiao and YU Jing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Yuxing, LI Yaan, CHEN Xiao and YU Jing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201901013]]></guid><cfi:id>14</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Single vector hydrophone target detection based on eigenvalue]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201901014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at solving the decline of detection performance under low signalnoise ratio and nonstationary background noise and combining the principle of eigenvalue detection, a combination information cross-correlation detection algorithm  based on single vector hydrophone was presented. This algorithm makes an assemble velocity by using electronic rotation angle and velocity information, and obtains a cross-correlation value with pressure. This value satisfies the asymptotic Gaussian distribution under large snapshot without target signal. This value is divided by minimum eigenvalue of analytical velocity covariance matrix to get a detection statistic. Finally, compared with the threshold, the object detection is achieved. The analysis of theory shows this algorithm does not need to know any prior information of background noise, and the detection performance can be improved by adjusting the guiding angle. This algorithm can achieve bearing estimation by using the relationship between detection statistic and guiding angle as to single target. The simulation and real data prove the superiority of the proposed algorithm, compared with the maximum-minimum eigenvalue detection algorithm and the energy detection algorithm.]]></description>
<pubDate>2019/3/15 11:33:34</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[MA Bole<sup>1,2</sup>, ZHU Shiqiang<sup>1,3</sup> and SUN Guiqing<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>MA Bole<sup>1,2</sup>, ZHU Shiqiang<sup>1,3</sup> and SUN Guiqing<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201901014]]></guid><cfi:id>13</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Aerodynamic parameter modeling of hypersonic gliding missile for adaptive tracking]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201901015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the modeling problem of hypersonic gliding missile tracking, a method of aerodynamic parameter model based on the law of guidance variables was studied. The aerodynamic parameters were analyzed and the shortcomings of the traditional modeling method were pointed out. With the assumption that the guidance variables obey the first-order delay process, the aerodynamic parameter model was derived by using the linearized aerodynamic coefficients. By analyzing the variants of model under different flight conditions, the model adaptability for target′s maneuver was proved. The values of unknown parameters were discussed, so as to realize the adaptive matching of model with flight state. Simulation results show that the performance of the proposed model is obviously better than the traditional model when the target is maneuvering. Simultaneously, the simulation under different filter parameters confirms the model′s validity.]]></description>
<pubDate>2019/3/15 11:33:34</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Kai<sup>1</sup>, XIONG Jiajun<sup>2</sup>, FU Tingting<sup>2</sup>, XI Qiushi<sup>2</sup> and LAN Xuhui<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Kai<sup>1</sup>, XIONG Jiajun<sup>2</sup>, FU Tingting<sup>2</sup>, XI Qiushi<sup>2</sup> and LAN Xuhui<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201901015]]></guid><cfi:id>12</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Safety comprehensive evaluation of large phase array radar system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201901016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In view of the LPAR (large phased array radar) system has too much safety factors and it is difficult to evaluate. Firstly，the LPAR safety evaluation index system based on the radar characteristic was analyzed and established. Secondly, a method to determine the comprehensive weight based on the improved FAHP(fuzzy analytic hierarchy process), entropy weigh and Lagrange algorithm was put forward, and the safety fuzzy comprehensive evaluation model was established. Thirdly, taking safety evaluation of the certain LPAR system as an example, the safety comprehensive weight of the LPAR system was determined by the proposed method, the safety evaluation was carried out by the established model. Finally, this method is compared with the traditional AHP method, and the feasibility and rationality of the method are verified.]]></description>
<pubDate>2019/3/15 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XIA Liang, YANG Jiangping, LIU Gen, HOU Xiaodong and ZHANG Xue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIA Liang, YANG Jiangping, LIU Gen, HOU Xiaodong and ZHANG Xue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201901016]]></guid><cfi:id>11</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Multi-scale feature extraction and feature selection network for radiation source identification]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202406015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Convolutional neural networks currently applied to radiation source identification process the time-series IQ( in-phase and quadrature-phase) signals in two ways:one way transforms them into images, and the other way extracts shallow features of the IQ time-series data. The former way leads to a large computational effort of the algorithm, while the latter way leads to a low accuracy of the recognition rate. To address the above problems, a multi-scale feature extraction and feature selection network was proposed. After inputting the IQ signal, the shallow and multi-scale features of the IQ signal were extracted by the multi-scale feature extraction network. Then the data dimension of multi-scale features was reduced by the feature selection network. Feature enhancement was achieved by the adaptive linear rectification unit, and a single fully connected layer was used to classify the radiation source. Comparison experiments with ORACLE, CNN-DLRF and IQCNet on the FIT/CorteXlab radio frequency fingerprint recognition dataset show that the proposed network improves the recognition accuracy and reduces the computational effort to some extent.]]></description>
<pubDate>2024/12/2 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHANG Shunsheng, DING Huancheng, WANG Wenqin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Shunsheng, DING Huancheng, WANG Wenqin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202406015]]></guid><cfi:id>10</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Noise-aware MEMD-XGBoost method for GNSS vertical time series modeling and prediction]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202406016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The study of GNSS(global navigation satellite system) vertical time series is helpful for monitoring and analyzing the movement of crustal plates, and can provide an important basis for judging the movement trend. A MEMD-XGBoost model was constructed based on empirical mode decomposition and extreme gradient boosting algorithm for GNSS vertical time series prediction and analysis. In order to verify the prediction performance of the model, the vertical time series data of 8 GNSS stations were selected for prediction experiments. The feature construction results show that multiple empirical mode decomposition can accurately extract the original time series information and provide effective features. The modeling results show that the MEMD-XGBoost model can effectively improve the data quality. The prediction results show that the prediction results of the MEMD-XGBoost model have high precision and accuracy, and the degree of error dispersion is small, the model has strong stability and robustness, and can better predict the movement trend and seasonal changes in the U direction of the GNSS station. Therefore, the model can be applied to GNSS vertical time series modeling and prediction research.]]></description>
<pubDate>2024/12/2 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LU Tieding, LI Zhen, HE Xiaoxing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Tieding, LI Zhen, HE Xiaoxing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202406016]]></guid><cfi:id>9</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Multi-station fusion sorting algorithm for radar signals based on partial connection number trend]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202406017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the situation that the existing sorting algorithms were more or less dependent on prior information or difficult to adapt to multi-function radar, a multi-station fusion sorting algorithm based on set pair potential of partial coefficients was presented. The partial connection number parameter was introduced from the set pair analysis in the mathematical field to establish a clustering model. On this basis, the decision level fusion of clustering results was carried out by using the arrival time difference parameter in the multi-station cooperation mode. The actual measurement data and simulation results show that the algorithm can adapt to multi-functional radar systems such as search, acquisition and tracking,and realize the accurate clustering and fusion of radar pulse signals without any prior information. The sorting success rate is more than 97% in case of the jamming pulse ratio is lower than 60%.]]></description>
<pubDate>2024/12/2 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Lutao, LI Jinkai, LI Pin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Lutao, LI Jinkai, LI Pin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202406017]]></guid><cfi:id>8</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[User-oriented UAV-aided MEC network performance optimization]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202406018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the problem that the energy consumption of UAV(unmanned aerial vehicle) with high visual range and high maneuverability characteristics in the air ground efficient data communication system assisted by MEC(mobile edge computing) of UAV with high visual range and high mobility characteristics has a direct impact on the communication quality and multi-user and multi service requirements, a alternating iterative optimization method was proposed to minimize the system energy consumption on the premise of ensuring user experience. By establishing a UAV-MEC network system containing five sub models of UAV trajectory, channel model, local computing model, computing unloading model and UAV energy consumption, the UAV trajectory, user unloading volume and UAV power were jointly optimized. The system energy consumption was optimized. The simulation results show that compared with existing benchmark schemes, the computational energy consumption of end users reduce by 35%, and the overall performance of the system is improved.]]></description>
<pubDate>2024/12/2 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[XUE Jianbin, WU Qingqing, ZHANG Haijun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XUE Jianbin, WU Qingqing, ZHANG Haijun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202406018]]></guid><cfi:id>7</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Orientation-dependent error calibration algorithm for polarization sensitive array]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202406019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In practical applications, multiple types of array errors exist simultaneously. In view of the orientation dependence of array errors in this case, an improved MUSIC(multiple signal classification) algorithm based on MST(manifold separation technique) was proposed, which can effectively solve DOA(direction of arrival) estimation problem under the influence of multiple array errors. The sampling matrix, which contains all the non-ideal characteristics of the array was obtained by using MST, so as to achieve accurate direction finding. By using two-dimensional Fourier transform, the 2D spatial spectrum was solved. Compared with existing MUSIC algorithm, the computation amount of spectrum peak searching was reduced. Theoretical analysis and simulation verify the effectiveness of the algorithm, which can provide reference for the solution of practical problems.]]></description>
<pubDate>2024/12/2 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LIU Lutao, ZHAO Zijun, LI Li]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Lutao, ZHAO Zijun, LI Li</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202406019]]></guid><cfi:id>6</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[In-network collaborative computing method for low-latency demand of military IoT tasks]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202501014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To solve the problem of high-communication latency consumption when sensor data during the round trip to the server application layer in the military IoT(Internet of Things), an in-network collaborative computing method for multiple devices with low-latency task demands was proposed. This method relied on a network architecture with P4 switches as the core and employed a data-plane programming strategy based on the P4 program to complete the packet processing within the switch. A task mapping strategy was designed to map the task set to a switch network topology, thus realizing a collaborative operation mode in which tasks were computed while being transferred on the network topology path. After that, a latency optimization model was built to find the best mapping result, and the task was further optimally scheduled through the heterogeneous earliest finish time algorithm. Experimental results show that when the data size of a single packet is 1 000 Byte, the output latency of this method is reduced by about 54.2% and 72.1% compared with the local service and cloud service, respectively. Therefore, the proposed method effectively reduces latency, offering a practical solution to meet the low-latency demands of tasks.]]></description>
<pubDate>2025/1/20 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[REN Jijun, LI Ruibiao, MA Buyun, REN Zhiyuan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>REN Jijun, LI Ruibiao, MA Buyun, REN Zhiyuan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202501014]]></guid><cfi:id>5</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Fluctuation error quantization aided improved Cascade protocol]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202501015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the problems of low reconciliation efficiency and key leakage of the classical Cascade protocol, an improved Cascade protocol aided by fluctuation error quantization was proposed. Before reconciliation, the statistical characteristics of the fluctuation difference of channel magnitude feature of legitimate nodes were studied and a fluctuation error quantization method was proposed by using it. Based on the proposed quantization method, an improved Cascade protocol was designed by parity grouping and partitioning reconciliation. Numerical results demonstrate that the proposed improved Cascade protocol effectively improve the reconciliation efficiency, reduces the computational complexity required for information reconciliation and the possibility of key information leakage at the cost of partial reconciliation success rate. In addition, compared with the existing key generation schemes, the key generation scheme based on the proposed improved Cascade protocol has a lower key inconsistency rate and a higher key generation rate.]]></description>
<pubDate>2025/1/20 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[ZHOU Zhuang, LUO Junshan, XIE Shunqin, CHEN Yuhao, WANG Shilian]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Zhuang, LUO Junshan, XIE Shunqin, CHEN Yuhao, WANG Shilian</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202501015]]></guid><cfi:id>4</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Key techniques and on-orbit verification for SIoT system in TT-5 satellite]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202501016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The SIoT (space-based Internet of Things) is an effective supplement and extension of the ground-based IoT, and it is a basic technical means to build the interconnection of all things and ubiquitous perception. Taking the SIoT integrated in TianTuo-5 as an example, it aims at the application requirements of multi-domain and multi-scenario covering land, sea and air. It focuses on solving the high-reliability detection of the signals of AIS (automatic identification system), ADS-B (automatic dependent surveillance-broadcast) system and the multiple access of DCS (data collection system). This achieves real-time supervision of navigation and aviation goals and the global layout of extremely massive narrowband IoT sensor terminals, and provide reference scheme for the demonstration, construction, development and scale application of our country′s SIoT.]]></description>
<pubDate>2025/1/20 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[LI Songting, CHEN Lihu, YU Sunquan, CUI Junwei, ZHAO Yong, YANG Lei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Songting, CHEN Lihu, YU Sunquan, CUI Junwei, ZHAO Yong, YANG Lei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202501016]]></guid><cfi:id>3</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[OVMD-MF algorithm for fiber optic leakage current sensing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202501017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at low response and weak measurement ability of the all-fiber optic leakage current sensor in the ship power network, a denoising method based on the combination of VMD(variational modal decomposition) and MF(morphological filtering) was proposed to improve the ability of weak current measurement. The hunter-prey optimization algorithm was used to search for the optimal combination of model number and quadratic penalty term based on the minimum entropy of the Hilbert spectrum, and the intrinsic mode functions component were obtained by completing the variational mode decomposition. The practical modal function component was determined by setting the correlation coefficient threshold to complete the signal reconstruction. The structure factor and scale coefficient of MF were determined by the hunter-prey optimization algorithm with the signal-to-noise ratio as the fitness function. The reconstructed signal was subjected to time-domain denoising processing to further denoise in the leakage current signal. This method significantly improve the signal-to-noise ratio and reduce the minimum mean square error to the existing filtering methods by simulation analysis and experimental verification. The leakage current resolution is achieved to 3mA with the proposed denoising algorithm.]]></description>
<pubDate>2025/1/20 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[WU Jianhua, ZHANG Xiaofeng, CHEN Liang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Jianhua, ZHANG Xiaofeng, CHEN Liang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202501017]]></guid><cfi:id>2</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design of CTLE with SS-LMS adaptive equalization algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202501018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[With the continuous advancement of advanced processes and technologies, in order to ensure the accuracy of data during high-speed transmission, equalizers need to provide higher compensation and lower power consumption to achieve efficient communication. A high-gain and low-power adaptive CTLE(continuous time linear equalizer) was designed on the basis of the 12 nm CMOS(complementary metal-oxide-semiconductor) process, which adopted a two-stage cascade structure to compensate for channel attenuation and improve the quality of the received signal. In addition, the adaptive module used the SS-LMS(sign-sign least mean square) algorithm to accelerate the convergence speed of the tap coefficients. Simulation results show that when the transmission rate is 16 Gbit/s, the equalizer can compensate for a half-bit rate channel attenuation of -15.53 dB, and the equalizer coefficients converge within 16×10<sup>4</sup> unit interval data. Moreover, after convergence, the received error rate is lower than 10<sup>-12</sup>.]]></description>
<pubDate>2025/1/20 0:00:00</pubDate>
<category><![CDATA[Information &  Communication Engineering]]></category>
<author><![CDATA[TANG Minghua, YOU Haolong, LI Gang, ZHAO Zhenyang, CHEN Jianjun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TANG Minghua, YOU Haolong, LI Gang, ZHAO Zhenyang, CHEN Jianjun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202501018]]></guid><cfi:id>1</cfi:id><cfi:read>true</cfi:read></item>
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