对SAR-GMTI的灵巧遮蔽干扰方法研究  

A Smart Area Shading Jamming Method for SAR-GMTI

作　　者：周阳[1] 毕大平[1] 房明星[1] 沈爱国[1] 

机构地区：[1]电子工程学院503教研室,合肥230037

出　　处：《现代雷达》2016年第9期79-85,91,共8页Modern Radar

基　　金：国家自然科学基金资助项目(61171170)

摘　　要：提出了一种对SAR-GMTI灵巧遮蔽干扰方法。该方法通过匀加速运动调制实现方位向干扰的同时,对SAR信号进行余弦调相实现距离向干扰,将二者结合可在成像中形成区域遮蔽干扰效果,并以三通道干涉对消技术为例分析了其对多通道GMTI的对抗性能。该方法的优点有两个:一是遮蔽区域大小和位置均可以通过改变干扰参数进行灵活控制;二是干扰信号与SAR的距离向和方位向滤波器是基本匹配的,所需的干扰功率比较小。仿真实验证明了该方法对SAR成像和SAR-GMTI成像均具有很好的干扰效果。A smart area shading jamming method is presented for SAR-GMTI. Along azimuth jamming could be obtained by uni- formly-accelerating modulation of SAR signal and along range jamming could be obtained by cosine phase modulation of SAR sig- nal. The combination of them provides a smart area shading jamming. Then, the countering performance against GMTI is analyzed by using the tri-channel interference cancelling technique. The advantage of this method can be divided into two parts： first, the position and the square of area can be controlled by jamming parameters ; second, the power of jamming signal is low, because the signal is nearly matching to azimuth and distance filter. Simulation results verify its effectiveness both for SAR and SAR-GMTI.

关 键 词：合成孔径雷达地面动目标显示 余弦调相 调制干扰 对抗性能 

分 类 号：TN957.52[电子电信—信号与信息处理]