基于间歇采样转发干扰的ISAR群目标生成方法

Group targets generation against ISAR based on intermittent-sampling repeater jamming(ISRJ)

基于间歇采样转发干扰理论,提出了一种ISAR二维群目标生成方法。采用伴飞式干扰机,对所掩护的目标回波信号进行间歇采样转发,在ISAR上形成逼真的虚假二维群目标图像;通过调整干扰机和目标的空间位置关系,生成二维假目标序列,并能模拟目标的动态姿态变化。在介绍了间歇采样转发干扰的基本原理后,阐述了伴飞式干扰原理,然后从理论上推导了伴飞式干扰机的功率和空间位置要求,接下来着重分析了二维群目标生成的理论原因,指出了影响二维群目标分布的关键因素和群目标的姿态角变化规律,最后进行了仿真验证,结果表明了该方法的有效性。研究成果对于ISAR干扰机的设计和工程应用具有指导意义。

A novel generation method of 2-D ISAR group targets is presented based on Intermittent-Sampling Repeater Jamming （ISRJ）. Escort free-flight jammer was used to intermittently sample and repeater target echoes, whieh can generate vivid 2-D group targets in ISAR. By adjusting jammer and target＇ s relative space position, 2-D group targets are able to simulate target＇ s attitude angle dynamically. After the theory of ISRJ was expounded, the principle of escort free-flight jamming was introduced. A theoretical study was carried out to determine the requirement for power and position. Then the theoretical reason of 2-D group targets was emphatically analyzed. The key factor of false targets distribution and attitude angle was explored, Finally, the simulation demonstrates that the above method is effective. The results obtained from this research will help to provide better guidance for the design and engineering application of ISAR jammer.