自然地面场景的机载PD雷达地杂波仿真

Clutter Simulation for Airborne Pulse-Doppler Radar Based on Natural Ground Scene

在模拟地杂波时,直接从数字高程图(DEM)数据出发,对各小面单元进行遮挡判断,并利用PD雷达的回波信号模型,计算出各DEM单元对雷达回波的贡献,从而得到总的雷达地杂波。仿真结果表明,该方法仿真的雷达地杂波能够很好地反映出特定地面的起伏特性,从而证明该方法是有效的和实用的。

Facet model is used in this paper to simulate natural ground scene. Based on the scene＇s DEM data, we first determine the backscattering coefficient of each facet according to the experiment data recorded in some literatures. Shadow effect for each cell is also judged in this paper. The ground clutter returned from this specific scene for airborne pulse-Doppler radar then can be simulated. The simulation results showed the validity and practicability of the method.