机载双基地极化敏感阵列多干扰抑制  

A Multiple Interference Suppression Algorithm Based on Airborne Bistatic Polarization Radar

作　　者：夏德平 张良[1,2] 吴涛[2] 孟祥东[2] XIA Deping;ZHANG Liang;WU Tao;MENG Xiangdong(National Laboratory of Radar Signal Processing,Xidian University,Xi’an 710071,China;Nanjing Research Institute of Electronics Technology,Nanjing 210039,China)

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,西安710071 [2]南京电子技术研究所,南京210039

出　　处：《雷达学报（中英文）》2022年第3期399-407,共9页Journal of Radars

基　　金：国家部委基金。

摘　　要：为了破解雷达主瓣干扰尤其是多个主副瓣干扰同时抑制的难题,该文利用目标极化散射特性在不同入射角存在差异而干扰近似相同的特点,将极化信息应用到机载双基地雷达,通过构建机载双基地极化敏感阵列来实现主副瓣干扰抑制。该方法主要通过双基地-极化分级抑制来实现。首先重构协方差矩阵遮蔽主瓣干扰来分别抑制双基地主辅雷达副瓣干扰,然后将辅雷达接收数据时域对齐后送主雷达,最后修正主辅雷达主瓣干扰导向矢量,并利用极化对消实现主瓣干扰抑制。仿真结果表明:利用双基地-极化分级抑制方法可实现多个主副瓣干扰同时抑制,大幅提升雷达系统抗干扰能力。To solve the problem of the simultaneous suppression of main-lobe and side-lobe interferences,this study applies polarization information as input to the airborne bistatic radar and constructs an airborne bistatic polarization-sensitive array.The method is mainly realized by bistatic polarization hierarchical suppression.First,the reconstructed covariance matrix methods are used to suppress the side-lobe interference of the primary and auxiliary radars,Further,the data received by the airborne bistatic radar are aligned in the time domain,Finally,the main-lobe interference steering vector of the primary and auxiliary radars is corrected,and polarization cancellation is used to suppress the main-lobe interference.The simulation results show that the bistatic polarization classification method can simultaneously suppress multiple main-lobe and side-lobe interferences,and considerably improve the anti-interference capability of the radar system.

关 键 词：机载双基地雷达 极化散射矩阵 重构协方差矩阵 分级抑制主副瓣干扰 

分 类 号：TN974[电子电信—信号与信息处理]