箔条干扰下雷达信号自相关检测方法研究  

Research on Radar Signal Auto-correlation Detection Method under Chaff Jamming

作　　者：张发强 郭小云[2] 范照晋 ZHANG Fa-qiang;GUO Xiao-yun;FAN Zhao-jin(Department of Optoelectronic Engineering,Xi’an Technology University,Xi’an 710032,China;Xi’an North Electro-optic Science&Technology Defence Co.Ltd,Xi’an 710043,China)

机构地区：[1]西安工业大学光电工程学院,西安710032 [2]西安北方光电科技防务有限公司,西安710043

出　　处：《火力与指挥控制》2021年第11期61-64,72,共5页Fire Control & Command Control

基　　金：陕西省自然科学基金资助项目(2019JQ-316)。

摘　　要：箔条是雷达无源干扰的常用材料,由于目标的雷达回波信号被淹没在箔条云强背景噪声中,雷达难以探测和跟踪目标,提出利用自相关方法检测箔条干扰下目标的雷达回波信号。对箔条云回波噪声进行了数学描述和仿真分析,可以看出箔条噪声是多个随机高斯分布的叠加;介绍了自相关检测箔条干扰下雷达回波信号的基本原理,并用SIMULINK软件对具体实例进行分析,利用接收的回波信号自相关函数反推出信号周期,并利用自相干法把淹没在噪声中的信号提取出来,所提取的信号和原信号具有很高的相似度,该方法对提高雷达抗箔条干扰有重要的研究意义。Chaff is a kind of common material of radar passive jamming.The radar echo signal of the target is submerged in the strong background noise of chaff cloud,so it is difficult for radar to detect and track targets.The method of auto-correlation is proposed to detect the radar echo signal under chaff jamming.Firstly,the mathematical description and simulation analysis of echo noise of chaff cloud are provided.Chaff cloud echo noise is the superposition of multiple random Gaussian distributions.Secondly,the basic principle of radar echo signal under auto-correlation detection chaff interference is introduced,and the specific example is analyzed by SIMULINK software.Finally,the period of the signal is deduced reversely by using the auto-correlation function of the received echo signal,and the signal submerged in noise is extracted with self-coherence method.The extracted signal has high similarity with the original signal.This method has important research significance for improving radar anti-chaff jamming.

关 键 词：箔条云 雷达回波 自相关检测 高斯噪声 自相干法 

分 类 号：TN957.51[电子电信—信号与信息处理] TJ76[电子电信—信息与通信工程]