SAR-GMTI匀速运动虚假场景干扰信号快速生成方法  

A fast jamming method for false uniformly-moving scene against SAR-GMTI

作　　者：林晓烘[1] 薛国义[1] 刘培国[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2013年第6期82-87,共6页Journal of National University of Defense Technology

基　　金：国家部委资助项目;国家重大科技专项(2012ZX03006003-004)

摘　　要：静止虚假场景覆盖干扰无法有效对抗SAR-GMTI雷达系统。基于此,本文提出了一种能将静止虚假场景干扰信号快速转换为匀速运动虚假场景干扰信号的方法。文中通过对运动目标和静止目标回波模型的分析,推导出了两者之间的关系表达式;根据这个表达式,给出了实现该方法的三个步骤:沿距离向时域进行延迟操作,沿方位向时域进行伸缩变换,相位补偿;分析了该方法的计算量;仿真实验表明该方法可对SAR-GMTI形成匀速运动虚假场景的干扰效果,能同时保护静止场景和运动目标。The deceptive stationary scene jamming is not effective for countering synthetic apreture radar （SAR） and ground moving target indication （GMTI） radar systems. To solve this deficiency, a method which transforms the stationary scene jamming signals to uniformly-moving scene jamming signals in real time is proposed. First, the echo models of moving target and stationary target were analyzed. Then, a formula which describes the relationship between moving target echo signal and stationary target echo signal was derived. Based on this formula, a three- implementation-step of this method was presented as delay operation in range time domain, stretching transformation in azimuth time domain and phase compensation. Next, the computational complexity was analyzed. Finally, the simulation results indicate that the proposed method is effective to produce false uniformly-moving scene, through which the stationary scene and important ground moving targets can be protected against SAR- GMTI.

关 键 词：SAR—GMTI 欺骗干扰 匀速运动 虚假场景 

分 类 号：TN958[电子电信—信号与信息处理]