对SAR压制式干扰有效掩护区建模与仿真

Modeling and Simulation of SAR Interference Suppress Effective Sheltering Area

压制式干扰是对SAR进行电子对抗的重要作战方式。针对SAR回波信号特点,给出了SAR压制式干扰方程;以图像可懂度为指标,确定对区域掩护所需要的压制系数;对SAR探测中心线过干扰机以及未过干扰机时,干扰机对地面目标的有效掩护区进行了分析与建模;最后通过Matlab对某型机载SAR不同干扰功率以及干扰机偏移SAR探测中心线不同距离情况下的干扰机的有效掩护区进行了仿真,验证了模型的有效性。模型的建立可为对SAR干扰机配置,进而遏制SAR探测效能的发挥提供一定参考和辅助决策。

Suppress jamming for SAR is an important ECM combat way. Aiming at the characteristic of SAR echo signal, the SAR interference suppress equation is given. As image intelligibility for index, suppression coefficient for regional protection is determined. On SAR detect center line pass jammer or not, ground target effective sheltering area of jammer are analyzed and modeled. Finally for airborne SAR different interference power and offset distance between jammer and SAR detection center line, effective Sheltering area are simulated use Matlab, the validity of the model are verified. The established model is effectively for SAR jammer configuration, providing reference and decision for containing effectiveness of SAR detection