对SAR双通道对消的方位向间歇采样散射波干扰  

Azimuth Intermittent Sampling Scatter-Wave Jamming Against SAR Dual-Channel Cancellation

作　　者：张云鹏 毕大平[1] 房明星 沈爱国[1] ZHANG Yun-peng;BI Da-ping;FANG Ming-xing;SHEN Ai-guo(Electronic Countermeasure Institute,National University of Defense Technology,Hefei,Anhui 230037,China;The Unit 61886 of PLA,Beijing 100000,China;The Unit 31103 of PLA,Nanjing,Jiangsu 210000,China)

机构地区：[1]国防科技大学电子对抗学院,安徽合肥230031 [2]解放军61886部队,北京100000 [3]解放军31103部队,江苏南京210000

出　　处：《电子学报》2018年第12期2832-2839,共8页Acta Electronica Sinica

基　　金：国家自然科学基金(No.61171170).

摘　　要：合成孔径雷达(Synthetic Aperture Radar,SAR)通道对消技术可有效抑制散射波干扰等多种干扰类型,因此本文提出利用方位向间歇采样散射波干扰慢时间间歇性来对抗SAR双通道对消系统的干扰方法.首先详细推导了散射波干扰的SAR双通道对消原理,然后建立了方位向间歇采样散射波干扰模型并分析了该方法对传统SAR成像的干扰效果.在此基础上,分别研究了该干扰方法在双通道对消系统分别采用两种相位补偿条件时的对抗效果.理论与实验分析表明:当采用自动相位搜索算法估计相位进行补偿时,可使得场景对消成像出现类似噪声的混乱明暗斑点,并伴随着未对消的虚假散射场景;当采用准确相位进行补偿时,可在对消成像中形成多个虚假散射场景和对消暗条纹.Synthetic aperture radar(SAR)dual-channel cancellation technique can suppress various kinds of jamming signals including the scatter-wave jamming signals,so utilizing the azimuth intermittent sampling scatter-wave jamming method to counter the dual-channel cancellation system via slow-time intermittence is put forward.First,the SAR dual-channel cancellation principle of scatter-wave jamming is derived.Then the azimuth intermittent sampling scatter-wave jamming model is built,and its jamming performance to traditional SAR is analyzed.Next,its jamming performance to SAR dual-channel cancellation system in two kinds of phase compensation conditions is studied.Theoretical analysis and experiment results show that,when the phase estimated by the automatic phase searching algorithm is used,this jamming method can produce chaotic dark and bright speckles and false scattering scenes in the scene cancellation imaging;when the exact phase is used directly,this jamming method can produce multi-false scattering scenes and cancellation dark stripes.

关 键 词：合成孔径雷达(SAR) 双通道对消 间歇采样 散射波干扰 电子对抗 

分 类 号：TN974[电子电信—信号与信息处理]