分布式雷达主瓣间歇采样转发干扰抑制方法  

Main-Lobe Interrupted Sampling Repeater Jamming Suppression Method in Distributed Radar

作　　者：陈静[1] 李晗 张洪纲 刘泉华 CHEN Jing;LI Han;ZHANG Hong-gang;LIU Quan-hua(School of Information and Control, Xi ’ an University of Architecture and Technology, Xi ’ an, Shaanxi 710055, China;School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China;Department of Electronic Engineering, Tsinghua University, Beijing 100084, China;Key Laboratory of Electronic and Information Technology in Satellite Navigation(Beijing Institute of Technology), Ministry of Education, Beijing 100081, China)

机构地区：[1]西安建筑科技大学信息与控制学院,陕西西安710055 [2]北京理工大学信息与电子学院雷达技术研究所,北京100081 [3]清华大学电子工程系,北京100084 [4]卫星导航电子信息技术教育部重点实验室(北京理工大学),北京100081

出　　处：《信号处理》2018年第11期1368-1376,共9页Journal of Signal Processing

基　　金：中国长江学者计划(T2012122);国家自然科学基金(61771050);111引智项目(B14010)

摘　　要：主瓣间歇采样转发干扰是一种相干干扰,且该干扰从天线主瓣注入雷达,会严重影响雷达的性能。本文首先建立一发多收分布式雷达系统;并建立目标、间歇采样转发干扰数学模型;随后提出一种通过干扰辨识来估计纯干扰协方差矩阵的最小方差无失真(MVDR)抗干扰方法。通过对雷达回波脉压后的一维距离像作时频分析,并根据目标、干扰信号的时频特性差异来辨识目标与干扰,在此基础上,估计纯干扰信息,作为MVDR波束形成器的训练样本,实现对主瓣间歇采样转发干扰的抑制。最后,通过仿真验证了该方法的有效性。The main-lobe interrupted sampling repeater jamming is a kind of coherent jamming. This jamming is injected into the radar from the main lobe of the antenna, which will seriously degrade the performance of the radar. In this paper, for the distributed radar system with single transmitter and multiple receivers, a mathematical model containing the target signal and interrupted sampling repeater jamming is established. Moreover, an anti-jamming method based on minimum variance distortionless response (MVDR) is proposed. The pure interference covariance matrix is estimated by jamming recognition. The time-frequency analysis is performed on the one-dimensional range profile, and the target and the jamming can be identified according to their time-frequency characteristics. After this, the pure interference information is estimated as the training data of MVDR beamformer, suppressing the interrupted sampling repeater jamming. Finally, the simulation results are given to demonstrate the effectiveness of our method.

关 键 词：间歇采样转发干扰 分布式雷达系统 干扰辨识 时频分析 最小方差无失真 

分 类 号：TN974[电子电信—信号与信息处理]