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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·管理科学与工程·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[Characteristics of air-to-air wireless channel in sea scenario]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202302009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For the remote communication scenario of UAV(unmanned aerial vehicle) at sea, the received power was measured on the basis of the wireless communication link between UAVs. In terms of large-scale path loss, the logarithmic distance linear model was used to fit the measurement data. The characteristics of remote air-to-air wireless channel at sea were analyzed, and the path loss index was obtained. The ray tracing method was used to simulate and verify the measurement results. Through the simulation of channel impulse response, the reasons for the rapid change of received power were analyzed in terms of multipath delay and power. The analysis results show that the multipath reflection in the nearshore causes the fluctuation of the received power and increases the path loss. Three kinds of distribution functions were used to fit the measured data, and the small-scale distribution characteristics of air-to-air wireless channel under sea surface and inshore communication conditions were analyzed. The analysis of the measurement results shows that the small scale characteristics are significantly affect by the land reflection, showing Gaussian distribution characteristics at the sea surface far from the land, but not typical distribution characteristics near the land.]]></description>
<pubDate>2023/4/3 10:03:38</pubDate>
<category><![CDATA[信息与通信工程·管理科学与工程·电子科学与技术]]></category>
<author><![CDATA[DONG Yuliang, LEI Jing, HUANG Ying, LI Wei]]></author>
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<atom:name>DONG Yuliang, LEI Jing, HUANG Ying, LI Wei</atom:name>
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<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202302009]]></guid><cfi:id>8</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[Analysis of anti-spoofing performance of GNSS multi-beam anti-jamming receiver]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202302010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to analyze the anti-spoofing performance of the GNSS multi-beam anti-jamming receiver under spoofing interference scenario, a performance metric named deception suppression ratio was put forward. The theoretical formula for the power of the authentic and spoofed signal was deduced considering the anti-jamming receiver using the MVDR (minimum variance distortionless response) algorithm with limited number of snapshots. And the influence of the power of the spoofed signal arriving at the antenna array on the output power of the authentic and spoofed signal was analyzed in detail. The analysis shows that even if the power of the spoofed signal is below the noise level, the multi-beam anti-jamming receiver using the MVDR algorithm can still suppress the spoofing interference. And when the spoofed signal-to-noise ratio is high, the suppression is more effective. The conclusion was verified by simulation and hardware platform test.]]></description>
<pubDate>2023/4/3 10:03:38</pubDate>
<category><![CDATA[信息与通信工程·管理科学与工程·电子科学与技术]]></category>
<author><![CDATA[NI Shaojie, REN Binbin, CHEN Feiqiang, GAO Lichao, FENG Xiaochao]]></author>
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<atom:name>NI Shaojie, REN Binbin, CHEN Feiqiang, GAO Lichao, FENG Xiaochao</atom:name>
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<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202302010]]></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[Design and implementation of high speed parallel Gardner algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202302011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[With the gradual increase of space exploration tasks and the increasing tension of space channel spectrum resources, the traditional Gardner timing synchronization algorithm can no longer meet the demand of high throughput and high reliability of high-speed data transmission system. In order to improve the throughput and increase the correctable error range of Gardner timing synchronization algorithm, a high-speed parallel Gardner algorithm was proposed. To ensure the interpolation accuracy and reduce the multiplier consumption, a parallel piecewise parabolic interpolation filter was designed. To facilitate the parallel pipeline design and optimal sampling point selection, a counting module and a timing cache adjustment module were built. To improve the equivalent throughput rate, the pipelined parallel loop filter structure and the pipelined parallel numerically controlled oscillator structure were reconstructed. Results show that the equivalent throughput rate of the algorithm can reach 1 739.13 Msps, the digital signal processor resource consumption can be reduced by 44%, and the timing error of 2×10<sup>-3</sup> can be corrected.]]></description>
<pubDate>2023/4/3 0:00:00</pubDate>
<category><![CDATA[信息与通信工程·管理科学与工程·电子科学与技术]]></category>
<author><![CDATA[HU Wanru, WANG Zhugang, MEI Ruru, CHEN Xuan, ZHANG Ying]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Wanru, WANG Zhugang, MEI Ruru, CHEN Xuan, ZHANG Ying</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202302011]]></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[Optimization of sparse rectangular planar array using modified integer genetic algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202302012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to reduce the peak sidelobe level of sparse rectangular array with fixed sparse ratio and fixed aperture, a modified integer genetic algorithm was proposed. On the basis of the integer genetic algorithm, the crossover strategy of equal interval sampling, multi-point mutation strategy and excellent gene recombination strategy were proposed. The crossover strategy of equal interval sampling can effectively exert the advantages of integer coding, which improves the operation efficiency of the algorithm. In order to improve the diversity of the population and avoid falling into the local optimum, the multi-point mutation strategy was adopted. The excellent gene recombination technology was used to accelerate the convergence speed of the algorithm. Simulation results show that, compared with the traditional binary and real coding, the integer coding is more direct and efficient; compared with the related algorithms for sparse rectangular array optimization, the proposed algorithm obtains the better sidelobe level, which proves the effectiveness and superiority of the algorithm.]]></description>
<pubDate>2023/4/3 10:03:38</pubDate>
<category><![CDATA[信息与通信工程·管理科学与工程·电子科学与技术]]></category>
<author><![CDATA[GUO Qiang, WANG Yani, YUAN Ding, QI Lian′gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUO Qiang, WANG Yani, YUAN Ding, QI Lian′gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202302012]]></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[Hardware-accelerated consistent computing structure for signal processing and deep learning]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202302013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A variety of typical signal processing algorithms and deep learning algorithms were analyzed and modularized from the calculation requirements level. The computing modules, which were suitable for hardware acceleration parallelly in the two types of applications were extracted. A consistent computing model for signal processing and deep learning was proposed, and a hierarchical processing element and arrayed processing structure were proposed based on the consistent computing model in which the control part and computation part were separated. By the software definition of different application computing processes, the consistent hardware-accelerated computation of signal processing and deep learning could be realized flexibly.Based on Zynq computing platform, the consistency computing model and computing structure were verified from two aspects of reconstruction efficiency and computing performance. The validation results indicate that software-defined reconfigurable computing structures based on consistency computing models have high computational performance and reconstruction efficiency.]]></description>
<pubDate>2023/4/3 10:03:38</pubDate>
<category><![CDATA[信息与通信工程·管理科学与工程·电子科学与技术]]></category>
<author><![CDATA[GAO Yanzhao, TAO Changyong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GAO Yanzhao, TAO Changyong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202302013]]></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[Prophet method of GNSS vertical time series prediction considering the influence of noise]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202302014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[GNSS (global navigation satellite system) vertical time series have the characteristics of non-stationary, non-linear, and noisy. Based on the in-depth study of the Prophet prediction model, and the good predictive effect of Prophet prediction model on trend signals and periodic signals, a “noise reduction-decomposition-prediction” combined prediction method of GNSS vertical time series that introduces EMD (empirical mode decomposition) was proposed. EMD denoising was performed on the original time series, the denoised series were decomposed and predicted, and the predicted signal of each component was reconstructed into the final predicted series. The measured vertical data was used for research, and results show that the average signal-to-noise ratio of the signal after noise reduction is 10.30 dB, and the average energy percentage is 88.75%; using the short-term prediction method, the root-mean-square errors of GNSS vertical time series prediction results are increased by 26.41% and 14.88% on average, respectively; the average percentage errors are increased by 18.92% and 7.91% on average, respectively, and the effectiveness and practicability of the combined forecasting method are verified.]]></description>
<pubDate>2023/4/3 10:03:38</pubDate>
<category><![CDATA[信息与通信工程·管理科学与工程·电子科学与技术]]></category>
<author><![CDATA[LU Tieding, TAO Rui, HE Xiaoxing, CHENG Yuanming, ZHOU Ziqi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Tieding, TAO Rui, HE Xiaoxing, CHENG Yuanming, ZHOU Ziqi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202302014]]></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[Evaluation model of third-party service organization of equipment price based on gray correlation and neural network]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202302015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to scientifically and reasonably select the third-party service organizations of equipment price, the evaluation model was constructed by gray correlation analysis and neural network.The research data was obtained in the form of questionnaire survey. The gray correlation method was used to analyze the correlation between the evaluation index and the comprehensive score. It is found that the two primary evaluation indicators of service attitude and system construction are more important, with a correlation degree of more than 0.74. Using effective secondary indicators and comprehensive scores as input and output data, the evaluation model based on neural network was built. Finally, through the verification and analysis of the rationality of the method, it is found that the prediction accuracy probability of the neural network model is 75% and the probability of meeting the requirements is 25%, which meets the actual user needs and can provide suggestions for the competent departments to select third-party institutions.]]></description>
<pubDate>2023/4/3 10:03:38</pubDate>
<category><![CDATA[信息与通信工程·管理科学与工程·电子科学与技术]]></category>
<author><![CDATA[YANG Lifeng, SUN Shengxiang, YAO Yizhi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Lifeng, SUN Shengxiang, YAO Yizhi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202302015]]></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[Influence factors and coping strategies about the space transmission of particle beam]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202302016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The effects of initial beam distribution, divergence, energy divergence and geomagnetic field on the spatial transmission of particle beams were comprehensively analyzed, and the numerical modeling and quantitative numerical simulation of electrostatic diffusion and geomagnetic deflection effects were carried out. The simulation result shows that for particle beam with fixed beam energy and beam intensity, the electrostatic diffusion effect of the particle beam can be weakened by increasing the initial radius, and the exact direction of beam can be accurately predicted through accurate measurement of magnetic field. It can be seen that research on self-consistent force of charged particle beam and its interaction with external field is great significant to the study of generation, transport characteristics and engineering application of the particle beam.]]></description>
<pubDate>2023/4/3 0:00:00</pubDate>
<category><![CDATA[信息与通信工程·管理科学与工程·电子科学与技术]]></category>
<author><![CDATA[REN Sanhai, XING Yanjun, PENG Zhong, HUANG Huijun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>REN Sanhai, XING Yanjun, PENG Zhong, HUANG Huijun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202302016]]></guid><cfi:id>1</cfi:id><cfi:read>true</cfi:read></item>
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