基于时域延时的 ISAR 二维调制转发干扰

对逆合成孔径雷达(ISAR)来说,弹道中段目标的微多普勒效应实际上是一种方位向上的余弦调相效应,余弦调相 函数能实现频谱搬移,在方位向上产生多假目标。针对工程上无法实现对ISAR 信号方位向余弦调相的难题和方位向余 弦调相对距离向不起作用的问题,提出了一种基于时域延时的ISAR 二维调制转发干扰。该干扰在实现方位向余弦调相 的同时,能在距离向上形成一种新型盲移频的条带式干扰。 仿真结果表明:合适的延时参数将使目标淹没在距离-方位向上形成的多个假目标带中。

Two-dimension Modulation Repeater Based on Time Delay for ISAR

For inverse synthetic aperture radar, the micro-Doppler effect is actually a kind of cosinusoidal phase-modulation in azimuth, cosinusoidal phase-modulation function can achieve spectrum shift and produce multiple false targets. A new jamming method for ISAR based on time delay is proposed in order to solve the problem that cosinusoidal phase-modulation in azimuth for ISAR signal can not be realized in engineering and it has no interference effect on range domain. This kind of interference method can form a new type of stripe interference with blind frequency-shift jamming in range while realizing the azimuth cosinusoidal phase-modulation. The simulation results show that proper time delay parameters will make the target submerged in the multiple false target zones.