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<title cf:type="text"><![CDATA[Editorial department of the Journal of National University of Defense Technology -->信息与通信工程·电子科学与技术]]></title>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Infrared small target detection method based on improved non-convex estimation and asymmetric spatial-temporal regularization]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202403018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at infrared dim and small targets detection in complex background, a new kernel norm estimation method was proposed based on the non-convex tensor low-rank approximation algorithm with asymmetric spatial-temporal total variation regularization, replacing the original estimation method in the algorithm. An adaptive weight tensor based on structure tensor and multi-structure element Top-Hat filtering was proposed to constrain the target tensor, which had enhanced the sparsity and suppressed the remaining strong edge structures of the target tensor. Experimental results show that the proposed improved algorithm can better eliminate the influence of strong edge structure on the detection results, and has a lower false alarm rate than the original algorithm under the condition of ensuring the detection rate.]]></description>
<pubDate>2024/6/18 10:27:57</pubDate>
<category><![CDATA[信息与通信工程·电子科学与技术]]></category>
<author><![CDATA[HU Liang, YANG Degui, ZHAO Dangjun, ZHANG Junchao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Liang, YANG Degui, ZHAO Dangjun, ZHANG Junchao</atom:name>
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<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202403018]]></guid><cfi:id>7</cfi:id><cfi:read>true</cfi:read></item>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Frequency and phase revision technique of DS/FH signal tracking]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202403019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Tracking procedure of DS/FH (direct sequence/frequency hopping) spread spectrum signal is effected by Doppler effect and ionospheric effect seriously, which makes it hard to be used for the anti-interference field of satellite navigation. To solve this issue, a recursive least square based filtering was proposed to improve this stability of DS/FH signal tracking. The carrier Doppler estimation with variable center frequency in different channel was converted to the estimation with the center frequency of the DS/FH signal and filtered, and the numerically controlled oscillator of carrier was revised according to the predicted Doppler frequency as the frequency hops. The total electron content was estimated in real time by observing the carrier phase and code phase mutations, and the carrier phase and code phase was revised as the frequency hops. Simulation experiments demonstrate the proposed method is effective to eliminate the frequency and phase discontinuity of the DS/FH signal tracking, whose tracking accuracy can be the same level as DS signal.]]></description>
<pubDate>2024/6/18 10:27:57</pubDate>
<category><![CDATA[信息与通信工程·电子科学与技术]]></category>
<author><![CDATA[WANG Yiwei, ZHANG Bo, HUANG Zhigang]]></author>
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<atom:name>WANG Yiwei, ZHANG Bo, HUANG Zhigang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202403019]]></guid><cfi:id>6</cfi:id><cfi:read>true</cfi:read></item>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Microwave frequency measurement based on dual optical frequency combs and stimulated Brillouin scattering]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202403020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A novel high-accuracy microwave frequency measurement based on dual coherent optical frequency combs and stimulated Brillouin scattering was investigated. The unknown microwave signal and the sweep signal were modulated by two dual parallel Mach-Zehnder modulators as the signal optical and the pump signal which were lunched into the dispersion shift fiber. Using dual optical frequency combs and the sweep signal with shifted frequencies, the proposed measurement system could realize the wave-division and time-division multiplexing simultaneously. At the same time, the action of dual optical frequency combs and stimulated Brillouin scattering brought the system a series of stimulated Brillouin scattering. The frequency of the unknown signal was estimated by measuring the output optical power of the multiple channels. Furthermore, in order to improve the frequency measurement accuracy, the measured optical power values were employed to generate an amplitude comparison function which can be utilized for error correction. The effectiveness of the proposed scheme is verified via numerical simulations with a measurement error at ±2.5 MHz.]]></description>
<pubDate>2024/6/18 10:27:57</pubDate>
<category><![CDATA[信息与通信工程·电子科学与技术]]></category>
<author><![CDATA[ZHANG Xianyu, LIANG Tao, AN Kang, QIAO Xiaoqiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Xianyu, LIANG Tao, AN Kang, QIAO Xiaoqiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202403020]]></guid><cfi:id>5</cfi:id><cfi:read>true</cfi:read></item>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Evaluation of damage effect against irregular area target by multiple missiles under uncertainty]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202403021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the case of lack of information, how to improve the reliability of the evaluation of the damage effect of multiple missiles against irregular surface targets is a major difficulty in the research of missile operation. An evaluation model for the damage effect on area targets with given parameters was established using the Monte Carlo method. Belief degree distribution functions were employed to assess the uncertainties in the problem, and the assessment results showed a high level of uncertainty in the damage effect. Based on belief entropy, the influence of the uncertainty in each attribute of the missile on the uncertainty of the damage effect was analyzed. By specifically reducing the uncertainty of attributes with significant impact, the uncertainty of the damage effect was iteratively decreased. Simulation results show that the range of uncertainty for the effective damage rate of the area target is significantly reduced. This research can effectively guide the work of damage assessment and reduce its uncertainty.]]></description>
<pubDate>2024/6/18 0:00:00</pubDate>
<category><![CDATA[信息与通信工程·电子科学与技术]]></category>
<author><![CDATA[WANG Zhihui, HU Jianwen, ZHU Xiaomin, ZHANG Yajun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Zhihui, HU Jianwen, ZHU Xiaomin, ZHANG Yajun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202403021]]></guid><cfi:id>4</cfi:id><cfi:read>true</cfi:read></item>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Principle analysis and preliminary experiment of the gyromagnetic nonlinear transmission lines]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202403022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[As a special kind of wideband high-power microwave source, the GNLTL (gyromagnetic nonlinear transmission lines) have drawn much attention due to the characteristics of high center frequency, easily implementation of frequency adjustment, high repetition frequency, etc. In order to clarify the special working mechanism of GNLTL, the differences between GNLTL and the traditional magnetic applications were compared and analyzed. Starting from the microscopic magnetization dynamics, a qualitative explanation was provided for the reasons of microwave generation at GNLTL. A low-power validation experimental setup was built, with a focus on introducing the construction of experimental scenarios and GNLTL design. Microwaves signals are generated in the experiment with a center frequency of 750 MHz, a 3 dB bandwidth of 12% and a peak power of 245 kW, the microwave generation effect of GNLTL is preliminary verified.]]></description>
<pubDate>2024/6/18 0:00:00</pubDate>
<category><![CDATA[信息与通信工程·电子科学与技术]]></category>
<author><![CDATA[CUI Yancheng, MENG Jin, YUAN Yuzhang, HUANG Liyang, ZHU Danni]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CUI Yancheng, MENG Jin, YUAN Yuzhang, HUANG Liyang, ZHU Danni</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202403022]]></guid><cfi:id>3</cfi:id><cfi:read>true</cfi:read></item>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Delayed accumulation combined with AR filtering for naval axial frequency electric field signal processing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202403023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to improve the signal-to-noise ratio of the target axial frequency electric field, a coherent accumulation method combined with AR(autoregressive) model filtering was proposed to process the array electric field signal for the application scenario of using an array of electric field sensors to measure the electric field of a ship. The measured array electric field signal with time delay compensation was accumulated. The ambient electric field signal was AR modeled. By using the parameters of AR model, a filter was constructed to filter the accumulated signal. To verify the effectiveness of the proposed method under low signal-to-noise ratio conditions, the measured array electric field signals were processed. Results show that the proposed method can effectively suppress the noise spectrum and retain the axis frequency line spectrum under the condition of a signal-to-noise ratio of -25.39 dB. After keep the axial frequency line spectrum, the signal-to-noise ratio increased by about 21.92 dB.]]></description>
<pubDate>2024/6/18 10:27:58</pubDate>
<category><![CDATA[信息与通信工程·电子科学与技术]]></category>
<author><![CDATA[CHENG Jinfang, XIE Changqi, ZHANG Jiawei, YU Peng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHENG Jinfang, XIE Changqi, ZHANG Jiawei, YU Peng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202403023]]></guid><cfi:id>2</cfi:id><cfi:read>true</cfi:read></item>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design of intelligent security and reliable payment system based on blockchain technology]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202403024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to enhance the security and reliability of the payment system, an intelligent payment system under blockchain technology was designed. This system leverages the decentralized and distributed ledger nature of blockchain to provide a more secure and transparent payment solution. The system combined blockchain technology, state secret algorithm and payment system to provide a more secure guarantee for the traditional internet payment system. The point-to-point characteristics of blockchain technology was used to solve the problems of payment efficiency, data security, etc. With the help of big data technology of internet, credit rating was provided to users and credit services are provided. Using trans-chain technology, the data of different blockchains can be shared to figure out a better solution to the liquidity of funds. Compared with Bitcoin, Ethereum and other electronic money systems, the system has achieved a balanced development in terms of security, transaction throughput and transaction delay, which has improved the performance of all aspects to a certain extent, and can better meet the application needs in the current environment.]]></description>
<pubDate>2024/6/18 0:00:00</pubDate>
<category><![CDATA[信息与通信工程·电子科学与技术]]></category>
<author><![CDATA[ZHANG Yanshuo, LIU Ning, LIU Tianye, CHEN Ying, ZHANG Lixian]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Yanshuo, LIU Ning, LIU Tianye, CHEN Ying, ZHANG Lixian</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202403024]]></guid><cfi:id>1</cfi:id><cfi:read>true</cfi:read></item>
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