采用干扰地形图方法对SAR干扰的研究

Study of SAR jamming way based on jamming map

根据目标电磁散射特性,提出一种干扰地形图的方法,对SAR的图像进行干扰。即针对不同的雷达参数,将所需的干扰图像中各散射点位置对应到时域,加权迟延,存储在DRFM中。干扰时将其与接收到的雷达信号相卷积,转发,雷达信号经处理后得到干扰和真实目标图像相叠加的复合图像。经仿真分析,如果雷达参数估计准确,干扰图像可以对真实图像进行欺骗干扰;如果估计有误差,也可以有效地进行遮盖性干扰。

Based on the scattering characteristics of targets, a method named as jamming maps is presented to jam SAR imaging. Aimed at the different radar parameters, this method is to transfer the position of every point in the desired man-made maps into the corresponding point in the time-domain, and then stores them into the DRFM in advance. When jamming is needed, the data in DRFM are convoluted with the received radar signals, and then the result signals are retransmitted. Radar singals having been processed a composite map including the real and the jamming information is gotten. Finally, the analysis of the simulation result shows that if the radar parameters are accurately estimated, the man-made map can have a good deception jamming effect, otherwise it still can have a good covering jamming effect in a certain area.