复杂目标地背景高频宽带建模仿真

Modeling and simulation of high-frequency wideband of complex targets and background

摘要: 提出了一种有效模拟电磁波在复杂目标与地背景之间多径传播的建模方法.应用多径回波模型模拟电磁波在地上静止目标与地表面间的多径传播，在现有高频区目标雷达散射截面计算方法的基础上，针对地面对电磁波的前向反射系数的影响，研究了复杂地面目标的雷达特征信号(包括一维距离像和二维合成孔径雷达(Synthetic Aperture Radar，SAR)像)的仿真方法.通过对比目标体直接散射及在考虑多径效应时的一维距离像、二维SAR像，分析了多径效应对地面目标宽带雷达回波的影响.通过仿真算例验证了所提方法的有效性.

Abstract: We present a technique for multi-path electromagnetic(EM) scattering modeling between targets and background. Based on radar cross section(RCS) calculating methods of high-frequency, by combining a multipath model with the forward complex reflecting coefficient model of rough ground, the radar signature of complex targets on the ground (including 1-D range profiles and 2-D SAR images) are studied. By comparing the 1-D range profiles with 2-D SAR images simulated in direct-path and multi-path scattering, the influence of multipath to the scattering of targets are analyzed. The experiments based on simulation data validate the proposed method.