基于时频交叉乘积的调频连续波SAR干扰方法研究  

FMCW SAR jamming method research based on time-frequency cross

作　　者：汪俊澎 邢世其[1] 李永祯[1] 黄大通 宋少秋 WANG Junpeng;XING Shiqi;LI Yongzhen;HUANG Datong;SONG Shaoqiu(State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学电子信息系统复杂电磁环境效应国家重点实验室,湖南长沙410073

出　　处：《系统工程与电子技术》2023年第6期1651-1657,共7页Systems Engineering and Electronics

基　　金：国家自然科学基金(61971429)资助课题。

摘　　要：调频连续波(frequency modulated continuous wave, FMCW)合成孔径雷达(synthetic aperture radar, SAR)具有隐蔽性好、成像分辨率高等显著优点,其被广泛应用于军事目标侦察与打击中,如何施加快速有效干扰成为了现今研究的重要问题。提出了一种基于时频交叉乘积的FMCW SAR干扰方法,通过截获信号与干扰图像模板进行调制,生成干扰信号,同时在处理FMCW SAR截获信号的过程中采用去斜处理,使得处理过程中信号采样率大幅降低。所得方法实现了逼真虚假场景生成,减小了干扰机调制过程中的运算复杂度,降低了硬件压力,具有工程可行性。Frequency modulated continuous wave(FMCW)synthetic aperture radar(SAR)has significant advantages of good concealment and high imaging resolution,which is widely used in military target reconnaissance and attack.Fast and effective jamming has become an important problem in today’s research.In this paper,FMCW SAR jamming method based on time-frequency cross is proposed.The intercepted signal is modulated with the jamming image template to generate the jamming signal.At the same time,the FMCW SAR intercepted signal is processed by dechirp method in signal handling process for the FMCW SAR’s intercepted signal,which greatly reduces the signal sampling rate in signal handling process.The proposed method realizes the generation of realistic fake scenes,which reduces the computational complexity in the modulation process of jammer and reduces the hardware pressure,and has engineering feasibility.

关 键 词：调频连续波合成孔径雷达 时频交叉乘积 去斜处理 虚假场景 运算复杂度 

分 类 号：TN95[电子电信—信号与信息处理]