Shift-frequency jamming suppression technique based on polarized channel expanding and blind source separation union
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摘要:
多次移频干扰是一种有效的对抗线性调频(LFM)脉冲压缩雷达的相干干扰样式,应用于自卫式干扰时,能够形成多个超前和滞后分布的假目标。提出利用盲源分离(BSS)的方法来分离回波和干扰信号,并通过频率补偿实现对干扰的抑制。首先分析了利用正交极化辅助天线扩展接收通道的可行性,其次建立了通道扩展后的雷达接收信号模型,讨论了回波与干扰信号的可分离性,最后研究了基于最大信噪比盲源分离和频率补偿的干扰抑制方法,并讨论了干扰机附加噪声对抗干扰效果的影响。仿真结果表明本文提出的方法在干信比为20dB时,仍可以有效地从回波和干扰混叠信号中提取出目标回波信号,从而实现对主瓣移频干扰的对抗。
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关键词:
- 移频干扰 /
- 极化通道扩展 /
- 盲源分离 (BSS) /
- 频率补偿 /
- 脉冲压缩
Abstract:Multiple shift-frequency jamming is an effective coherent jamming type to linear frequency modulation (LFM) pulse compression radar, which could produce multiple false targets before and after real target when it is applied in self-defense jamming. Considering the jamming suppression problem, a method based on blind source separation (BSS) to separate echo and jamming signals and frequency compensation to suppress jamming signal is proposed. First, the feasibility of cross polarized channel expanding was illustrated. Second, a radar-receiving-signal model was established after channel expanding. The separability of echo and jamming signal was discussed. Finally, the jamming suppression method based on the maximum signal-to-noise ratio blind source separation and frequency compensation was studied, and the influence of accessional noise from jammer was analyzed. Simulation results show that the proposed method could extract the target echo signal from the mixed signal effectively even when the jamming-to-signal ratio is 20 dB, which will suppress the main lobe shift-frequency jamming.
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[1] 黄翀鹏, 王剑, 徐保国.线性调频脉冲的移频干扰性能研究[J].系统工程与电子技术, 2013, 35(5):935-939. http://www.cnki.com.cn/Article/CJFDTOTAL-XTYD201305008.htmHUANG C P, WANG J, XU B G.Performance of shift frequency jamming against LFM signal pulse[J].Systems Engineering and Electronics, 2013, 35(5):935-939(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-XTYD201305008.htm [2] 刘忠, 陈登伟, 谢晓霞, 等.LFM脉冲压缩雷达抗移频干扰的方法研究[J].现代雷达, 2006, 28(11):84-86. doi: 10.3969/j.issn.1004-7859.2006.11.024LIU Z, CHEN D W, XIE X X, et al.A countering technique for LFM PC radar against shift frequency jamming[J].Modern Radar, 2006, 28(11):84-86(in Chinese). doi: 10.3969/j.issn.1004-7859.2006.11.024 [3] 吴晓芳, 邢世其, 王雪松, 等.对合成孔径雷达的脉间分段移频干扰[J].航天电子对抗, 2010, 26(1):53-57. http://www.cnki.com.cn/Article/CJFDTOTAL-HTDZ201001018.htmWU X F, XING S Q, WANG X S, et al.Interpulse subsection shift-frequency jamming to SAR[J].Aerospace Electronic Warfare, 2010, 26(1):53-57(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-HTDZ201001018.htm [4] 顾成虎, 曲丽娜.LFM脉冲压缩雷达的移频干扰技术研究[J].哈尔滨商业大学学报 (自然科学版), 2015, 31(3):350-353. http://www.cnki.com.cn/Article/CJFDTOTAL-DGKQ201408024.htmGU C H, QU L N.Study on frequency-shifting jamming to LFM pulse compression radar[J].Journal of Harbin University of Commerce (Natural Sciences Edition), 2015, 31(3):350-353(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-DGKQ201408024.htm [5] 周政, 唐宏, 张永顺.LFM脉压雷达的随机移频干扰研究[J].现代防御技术, 2010, 38(1):103-106. http://www.cnki.com.cn/Article/CJFDTOTAL-XDFJ201001026.htmZHOU Z, TANG H, ZHANG Y S.Randomly shift frequency jamming to LFM pulse compression radar[J].Modern Defence Technology, 2010, 38(1):103-106(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-XDFJ201001026.htm [6] 王玉军, 赵国庆.对LFM雷达的N阶SSC盲移频干扰方法[J].电路与系统学报, 2011, 16(4):70-74. http://www.cnki.com.cn/Article/CJFDTOTAL-DLYX201104013.htmWANG Y J, ZHAO G Q.Blind Nth-order SSC shift-frequency jamming to LFM radar[J].Journal of Circuits and Systems, 2011, 16(4):70-74(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-DLYX201104013.htm [7] 王玉军, 朱丽莉, 蒋磊.LFM雷达移频干扰特征的消隐方法研究[J].雷达学报, 2012, 1(4):420-425. http://www.cnki.com.cn/Article/CJFDTOTAL-LDAX201204015.htmWANG Y J, ZHU L L, JIANG L.The study on characteristic blanking technique in frequency shifting jamming for LFM radar[J].Journal of Radars, 2012, 1(4):420-425(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-LDAX201204015.htm [8] 冯有前, 余付平, 高大化, 等.稀疏分解在雷达移频干扰抑制方面的应用研究[J].计算机工程与应用, 2012, 48(6):129-130. http://www.cnki.com.cn/Article/CJFDTOTAL-JSGG201206040.htmFENG Y Q, YU F P, GAO D H, et al.Research on radar shift-frequency jamming suppression based on sparse decomposition[J].Computer Engineering and Applications, 2012, 48(6):129-130(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-JSGG201206040.htm [9] 尹洪伟, 李国林, 路翠华.一种基于复值盲分离的欺骗干扰抑制方法[J].上海交通大学学报, 2015, 49(10):1564-1569. http://www.cnki.com.cn/Article/CJFDTOTAL-SHJT201510023.htmYIN H W, LI G L, LU C H.An algorithm of deception jamming suppression based on complex-value blind source separation[J].Journal of Shanghai Jiao Tong University, 2015, 49(10):1564-1569(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-SHJT201510023.htm [10] 李飞, 李国林, 粘朋雷.基于盲源分离的雷达信号欺骗干扰抑制[J].海军航空工程学院学报, 2015, 30(5):424-428. doi: 10.7682/j.issn.1673-1522.2015.05.005LI F, LI G L, NIAN P L.Radar signal deception jamming suppressing based on blind source separation[J].Journal of Naval Aeronautical and Astronautical University, 2015, 30(5):424-428(in Chinese). doi: 10.7682/j.issn.1673-1522.2015.05.005 [11] 王小静, 罗双才.一种基于慢时域盲分离的欺骗干扰抑制方法[J].电子信息对抗技术, 2013, 28(2):42-46 http://www.cnki.com.cn/Article/CJFDTOTAL-DZDK201302010.htmWANG X J, LUO S C.An approach to the deception jamming suppression based on blind signal separation in slow-time domain[J].Electronic Information Warfare Technology, 2013, 28(2):42-46(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-DZDK201302010.htm [12] 罗双才, 唐斌.一种基于盲分离的欺骗干扰抑制方法[J].电子与信息学报, 2011, 33(12):2801-2806. http://www.cnki.com.cn/Article/CJFDTOTAL-DZDK201302010.htmLUO S C, TANG B.An algorithm of deception jamming suppression based on blind signal separation[J].Journal of Electronics & Information Technology, 2011, 33(12):2801-2806(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-DZDK201302010.htm [13] SCHLEHER D C.Electronic warfare in the information age[M].New York:Artech House, 1999:271-273. [14] 刘琚, 孙建德, 许宏吉.盲信号处理理论与应用[M].北京:科学出版社, 2013:10-12.LIU J, SUN J D, XU H J.Blind signal processing theory and application[M].Beijing:Science Press, 2013:10-12(in Chinese). [15] 高剑茹, 高宝成.基于最大信噪比的盲源分离方法的修正与比较[J].电脑与信息技术, 2009, 17(1):19-21. http://www.cnki.com.cn/Article/CJFDTOTAL-DNXJ200901007.htmGAO J R, GAO B C.Revision and comparison of blind source separation algorithm based on maximum signal noise ratio[J].Computer and Information Technology, 2009, 17(1):19-21(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-DNXJ200901007.htm [16] BORGA M.Learning multidimensional signal processing[M].Linkoping:Linkoping University, 1998:60-61.