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<title cf:type="text"><![CDATA[Editorial department of the Journal of National University of Defense Technology -->Electeomagnetic offense and defens]]></title>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Performance analysis and power optimization for simultaneous jamming and intercepting system with imperfect interference cancellation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202405001]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to describe the effects of interference cancellation performance on the simultaneous jamming and intercepting system quantitatively, the concept of jamming-intercepting outage probability with imperfect interference cancellation was proposed, the closed-form expression for jamming-intercepting outage probability was derived and the asymptotical expression was further obtained for ideal interference cancellation. Based on the derived performance closed-form expression, the optimal jamming power that minimizes the jamming-intercepting outage probability was identified. Accuracy of the analytical results and the correctness of optimal jamming power were justified through Monte-Carlo simulations. The results demonstrate that the jamming-intercepting outage probability decreases as the interference cancellation rate increases, decreases first and then increases as the jamming power and the transmit power increases, and the optimal jamming power increases as the transmit power increases, while the optimal jamming-intercepting outage probability converges to constant as the transmit power increases.]]></description>
<pubDate>2024/9/29 0:00:00</pubDate>
<category><![CDATA[Electeomagnetic offense and defens]]></category>
<author><![CDATA[GE Songhu, ZHANG Yunshuo, GUO Yu, XING Jinling, LI Yi, MENG Jin]]></author>
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<atom:name>GE Songhu, ZHANG Yunshuo, GUO Yu, XING Jinling, LI Yi, MENG Jin</atom:name>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Angular resolution analysis of four-channel mainlobe interference cancellation for monopulse at subarray level]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202405002]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The sum-difference four-channel mainlobe interference cancellation technique for monopulse radar at subarray level was studied. To this end, the signal model of four-channel interference cancellation at two-dimensional subarray level for monopulse radar was established, and a quantitative method using the signal-to-noise ratio loss of the useful signal as an indicator to characterize the angular resolution of mainlobe interference cancellation was proposed. Based on this, an analytical expression for the angular resolution of interference cancellation was further derived, and the theoretical boundary of the cancellation angle blind zone was clarified. The correctness of the analytical formula is verified by simulation and anechoic chamber experiment results. This research can provide a reference for the theoretical boundary analysis and engineering implementation of four-channel mainlobe interference cancellation technology.]]></description>
<pubDate>2024/9/29 0:00:00</pubDate>
<category><![CDATA[Electeomagnetic offense and defens]]></category>
<author><![CDATA[WU Hao, LIU Rang, GUO Yu, WANG Wantian, ZHANG Jiahao, MENG Jin]]></author>
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<atom:name>WU Hao, LIU Rang, GUO Yu, WANG Wantian, ZHANG Jiahao, MENG Jin</atom:name>
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<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202405002]]></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[Analysis of modeling and interference suppression requirement of multi-source wideband interference cancellation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202405003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To solve the problem of multi-source interference suppression in wideband interference cancellation, the theoretical model of multi-source wideband interference cancellation was established, and the influence law of the number of sampling antennas and time-domain filters on the interference suppression performance was obtained. The effect of correlation between interference sources on interference suppression performance was analyzed, and the difference of ICR(interference cancellation ratio) between multiple interference sources and single interference source was studied, and the compression coefficient was proposed as an index to measure the interference cancellation ratio of multiple interference sources. And the interference suppression requirement of multi-source wideband interference cancellation was obtained. Experiment results show that increasing the number of sampling antennas and time domain filters can significantly improve the interference cancellation ratio of the double interference sources. Besides, in the same scene, the ICR of double interference sources is more than 10 dB lower than that of single interference source. As the power difference between two interference sources becomes larger, the compression coefficient decreases, and the interference cancellation ratio gradually decreases. When the power difference between the two sources exceeds 25 dB, the compression coefficient is close to 1, and the double interference sources are equivalent to single interference source.]]></description>
<pubDate>2024/9/29 0:00:00</pubDate>
<category><![CDATA[Electeomagnetic offense and defens]]></category>
<author><![CDATA[QIN Huanding, MENG Jin, HE Fangmin, GE Songhu, XING Jinling, WANG Hengfeng]]></author>
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<atom:name>QIN Huanding, MENG Jin, HE Fangmin, GE Songhu, XING Jinling, WANG Hengfeng</atom:name>
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<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202405003]]></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[3D target track before detect algorithm in complex environment with interference and clutter]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202405004]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the problem of 3D target detection in complex environment with random false target interference and strong clutter, a multi-level track before detect algorithm based on the parallel-line-coordinate transformation was proposed. Radar measurement points were placed in the normalized radial range-time plane, azimuth-time plane and pitch angle-time plane successively, the non-coherent accumulation and points filtering were carried out in each level, and each level was processed only on the results of the previous level. Based on the prior information, track constraint and track fusion were carried out to obtain the final detection result. The performance of the algorithm was verified and analyzed through simulation. The results show that the proposed algorithm can effectively filter out false measurement points and achieve the detection of real tracks under different signal-to-interference clutter ratios, measurement errors, and clutter density.]]></description>
<pubDate>2024/9/29 0:00:00</pubDate>
<category><![CDATA[Electeomagnetic offense and defens]]></category>
<author><![CDATA[BO Juntian, ZHANG Jiahao, YU Hongbo, ZHANG Xiangyu, LUO Fengyi, YU Xi, LI Wei, WANG Hengfeng, MENG Jin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>BO Juntian, ZHANG Jiahao, YU Hongbo, ZHANG Xiangyu, LUO Fengyi, YU Xi, LI Wei, WANG Hengfeng, MENG Jin</atom:name>
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<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202405004]]></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[Reconstructed filter design for broadband communication interference cancellation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202405005]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new subband division and reconstruction framework around the requirements of broadband communication interference cancellation was proposed, and the subband division filter banks and the reconstruction filter were designed, which simplified the conditions for complete reconstruction and made the reconstruction filter have the characteristics of complementary transition in band amplitude. The simulation and experiment results show that the reconstruction filter can effectively reduce the bit error rate of reconstructed communication signals and solve the spectrum fluctuation phenomenon in the process of subband signal splicing. Therefore, the subband division and reconstruction framework and the design of the reconstruction filter proposed can effectively reconstruct the frequency-hopping communication signal, which provide new technical route and theoretical method for subband division and reconstruction engineering practice of broadband interference cancellation.]]></description>
<pubDate>2024/9/29 0:00:00</pubDate>
<category><![CDATA[Electeomagnetic offense and defens]]></category>
<author><![CDATA[ZHANG Yunshuo, WANG Ze, LI Yaxing, HE Fangmin, LIU Hongbo, MENG Jin]]></author>
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<atom:name>ZHANG Yunshuo, WANG Ze, LI Yaxing, HE Fangmin, LIU Hongbo, MENG Jin</atom:name>
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<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202405005]]></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[Modeling and analysis of spatial resolution in noncooperative interference cancellation technique]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202405006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Under the background of noncooperative interference cancellation, through the establishment of the received signal models of different array manifolds, the representation parameters of spatial resolution were proposed to measure the resolution and cancellation ability of different array manifolds to the close reach angles of interference signals and communication signals, and the influencing factors of spatial resolution were analyzed. The new evaluation criterion for array design of noncooperative interference cancellation was provided. The array transfer factor and output signal to interference plus noise ratio were derived as the evaluation criterions of array spatial resolution. From three aspects of array configuration, number of array element and array radius, the spatial resolution of different array manifolds were analyzed by simulation. And the results were verified by experiments. The experimental results are in good agreement with theoretical analysis and simulation, and the importance of spatial resolution on interference cancellation is proved. It provides the basis for subsequent array manifold optimization and auxiliary antenna design.]]></description>
<pubDate>2024/9/29 0:00:00</pubDate>
<category><![CDATA[Electeomagnetic offense and defens]]></category>
<author><![CDATA[LI Zheyu, LI Yaxing, ZHANG Jiahao, LUO Kang, HE Fangmin, MENG Jin]]></author>
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<atom:name>LI Zheyu, LI Yaxing, ZHANG Jiahao, LUO Kang, HE Fangmin, MENG Jin</atom:name>
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