SAR-GMTI匀加速运动假目标有源调制干扰方法

借鉴匀加速运动调制思想,提出了一种SAR-GMTI匀加速运动假目标有源调制干扰方法。详细确定了有源实现方式下各关键干扰参数,阐释了干扰成像结果,分析了速度、载频、斜距等侦察误差对干扰效果的影响,采用三孔径干涉对消方法研究了其对GMTI的对抗性能,并开展了基于实测数据的实验分析。该干扰样式携有逼真的匀加速运动特征,具有距离向相干、方位向部分相干的特点,可实现对SAR-GMTI的匀加速运动假目标干扰效果,是一种有效稳健的干扰方法。

Modulation Jamming Method of Active False Uniformly-Accelerating Targets Against SAR-GMTI

Using the idea of uniformly-accelerating motion modulation for reference,a novel active modulation jamming method of false uniformly-accelerating targets is proposed for countering Synthetics Aperture Radar(SAR)-Ground Moving Target Indication(GMTI) systems.Several key jamming parameters are determined,the jamming imaging result is analyzed,and the influence of reconnaissance errors on jamming performance is discussed.Furthermore,the countering performance of the proposed jamming method against GMTI is investigated by using the tri-antenna interference cancelling technique.Simulation experiments have been done based on the raw data.The result shows that,this jamming signal carries the vivid uniformly-accelerating motion features,and is processed coherently in the range direction and partially coherently in the azimuth direction,thus producing a false image of the uniformly-accelerating target.The proposed method is effective and flexible in engineering.