盲信号处理在雷达抗主瓣干扰中的性能分析  

Performance analysis of radar anti-mainlobe-jamming base on blind signal processing

作　　者：胡江湖 吉丰 Hu Jianghu;Ji Feng(Array and Information Processing Laboratory,College of Computer and Information,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学计算机与信息学院阵列与信息处理实验室,南京211100

出　　处：《国外电子测量技术》2020年第7期17-21,共5页Foreign Electronic Measurement Technology

摘　　要：针对雷达阵列接收到的具有恒模特性的主瓣压制式干扰,提出了基于盲分离和盲均衡的抑制方法,采用特征矩阵近似联合对角化(JADE)算法和恒模算法(CMA)进行研究,从理论分析和仿真实验两个方面分析了两种算法的性能,对比了不同场景下两种算法的性能。仿真结果表明,在单干扰场景下,JADE算法对主瓣压制式干扰的抑制效果比CMA好6dB左右,而且基本不受干扰强度的影响,表明JADE算法具有更好的稳健性;在多干扰场景下,JADE算法性能明显下降,而CMA完全失效,表明盲信号处理对于雷达主瓣压制式干扰的抑制作用有限。Aimed at the mainlobe suppressive jamming with constant modulus character that radar array received,a suppression method,based on blind source separation and blind equalization,was proposed.Using joint approximation diagonalization of eigenmatrices(JADE)algorithm and constant modulus algorithm(CMA),the method analyzed performance of these two algorithms and compared them under different conditions in theoretically and experimentally.Simulation results show that the suppressioneffect of JADE algorithm better than CMA about 6 dB under single jamming condition,and it′s almost not affected by jamming intensity,this indicates JADE algorithm is more robust.While under multiple jamming condition,performance of JADE algorithm degrade significantly,and CMA nearly run down.This result manifests blind signal processing has limited effect when suppressing mainlobe suppressive jamming of radar.

关 键 词：主瓣压制式干扰 盲分离 盲均衡 JADE CMA 

分 类 号：TN974[电子电信—信号与信息处理]