数目可调型ISAR图像欺骗干扰技术研究

Deception jamming with alterable number of images for countering ISAR

将间歇采样转发处理和散射波干扰方法相结合,提出了一种针对逆合成孔径雷达(inverse synthetic aperture radar,ISAR)的虚假目标图像数目可调型欺骗干扰方法。推导并对比了雷达目标回波和散射波干扰信号在目标二维ISAR图像重构时的差异,分析了散射波干扰后虚假图像的旋转现象;结合解线频调处理,分析了间歇采样占空比、采样周期对干扰效果的影响,得到了虚假图像数目与成像场景大小、采样周期之间的约束关系,从而实现虚假目标图像数目可调。数字仿真和实测数据实验均证明了该方法的有效性。

Based on scatter-wave jamming and intermittent sampling repeater,a deception jamming method for countering inversee synthetic aperture radar （ISAR）is proposed.The 2D ISAR image reconstruction diffe-rence between the images formed by the jamming signals and by the radar signals is analyzed and there is a rota-tional angle in the false-target images.With the dechirping,the jamming effect caused by the intermittent ratio and the sampling interval is analyzed.The restriction between the number of the false-target images and the size of the imaging scene and the sampling interval is given so that the number of the false-target images can be con-trolled.The analyses are verified by processing of simulated and real data.