基于BSS的FDA-MIMO雷达主瓣欺骗式干扰抑制方法  

Main-lobe deceptive jamming suppression with FDA-MIMO radar based on BSS

作　　者：高霞 全英汇 李亚超[2] 朱圣棋[2] 邢孟道[2] GAO Xia;QUAN Yinghui;LI Yachao;ZHU Shengqi;XING Mengdao(School of Electronic Engineering, Xidian University, Xi’an 710071, China;National Key Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China)

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071 [2]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《系统工程与电子技术》2020年第9期1927-1934,共8页Systems Engineering and Electronics

基　　金：国家自然科学基金(61772397,61303035,61471283);西安电子科技大学研究生创新基金资助课题。

摘　　要：主瓣欺骗式干扰与目标位于同一个波束宽度内,严重影响了雷达对真实目标的检测与参数估计。针对此问题,基于频率分集阵列多输入多输出(frequency diversity array multiple input multiple output,FDA-MIMO)雷达,提出了一种抑制主瓣欺骗式干扰的方法。所提方法的主要突破点在于,当干扰和目标的角度完全相同时,利用FDA-MIMO雷达天线方向图的距离角度二维依赖性,进一步通过基于最大信噪比(maximum signal to noise ratio,MSNR)的盲源分离(blind source separation,BSS)算法将干扰和目标分离在不同的通道,以达到抑制干扰的目的。该方法无需目标的距离、角度先验信息。仿真实验验证了所提算法的有效性,当干噪比(jamming to noise ratio,JNR)为80 dB时,目标的正确检测概率约为0.98。The main-lobe deceptive jamming is located in the same beam width as the target does,which seriously affects the detection and parameter estimation of the real target.To solve this problem,a method to suppress the main-lobe deceptive jamming is proposed based on the frequency diversity array multiple input multiple output(FDA-MIMO)radar.The main breakthrough of the proposal is that when the angles of the jamming and the target are exactly identical,the distance-angle 2D dependence of the antenna pattern of the FDA-MIMO radar is available.Further,the blind source separation(BSS)algorithm based on the maximum signal to noise ratio(MSNR)is applied to separate the deceptive jamming from the target in different channels,so as to achieve the purpose of jamming suppression.This method does not need the prior information of the distance and the angle of the target.The simulation results verify the effectiveness of the proposed algorithm,and when the jamming to noise ratio(JNR)is 80 dB,the correct detection probability of the target is about 0.98.

关 键 词：主瓣欺骗式干扰 频率分集陈列多输入多输出雷达 距离角度二维依赖性 盲源分离 

分 类 号：TN957.51[电子电信—信号与信息处理]