基于电磁测量数据的ISAR目标虚假回波合成方法

A Method of False Echoes Generation Based on Electromagnetic Measurements for Countering ISAR

生成高逼真模拟目标特性的虚假回波是逆合成孔径雷达(ISAR)欺骗干扰的关键。提出了一种基于目标电磁测量数据的虚假目标回波合成方法,首先测量待模拟目标的电磁特性,将目标电磁测量数据解频调后提取幅度和相位信息作为调制参数,对干扰机截获的雷达信号进行调制生成虚假信号。该方法能高逼真地模拟目标的电磁散射特性,对ISAR形成有效欺骗干扰。在给定目标特性条件下,分析了雷达信号参数对虚假目标成像尺寸的影响,并通过仿真验证了理论分析的正确性。

Fast generation of vivid false echoes is the key problem of deception jamming to in- verse synthetic aperture radar （ISAR）. A novel method to synthesize false echoes based on the electromagnetic characteristics of simulated target model is proposed. Firstly, the electromagnetic characteristics of the target to be simulated is measured, then the amplitude and phase informa- tion of the measured data after dechirping are extracted and used as modulation parameters, which are modulated on the radar signal intercepted by jammer subsequently, thereby the false echoes are generated. The electromagnetic and geometrical characteristics of interested targets are simulated vividly with the proposed method of false echoes generation, and effective deception jamming is formed to hostile ISAR. Finally, the influences of radar signal parameters on the false target size in radar image are analyzed under given conditions, and the results of the theoretical analysis are verified by simulation experiments.