基于电磁计算的三维模型SAR回波仿真  

SAR raw signal simulation for 3D model based on electromagnetic computing

作　　者：林江红[1] 刘尚文[1] 舒汀[1] 郁文贤[1] 

机构地区：[1]上海交通大学空间信息技术研究中心,上海200240

出　　处：《信息技术》2013年第2期166-169,共4页Information Technology

摘　　要：SAR回波信号模拟具有广泛的应用背景,传统回波信号仿真方法使用SAR或光学图像作为后向散射系数,将仿真场景/目标看成孤立的散射单元而忽略了电磁波的多次散射,不能精确地仿真场景/目标的电磁特性。文中利用三维建模技术对SAR目标精确建模,采用电磁计算中的弹跳射线法更加精确地计算三维模型的电磁散射特性,然后利用距离频域脉冲相干(RFPC)法仿真SAR回波信号。最后,通过点目标与坦克的仿真及成像,验证了该方法的合理性与可行性。SAR raw signal is desperate needed in many categories. However, traditional simulation algorithms use SAR or optical image as backscattering coefficient, divide scene or target into separated scattering facet and ignore multi-scattering of electromagnetic waves. This paper computes 3D model＇ s electromagnetic properties via shooting and bouncing ray. Then, it simulates raw signal by RFPC. At last, it simulates point target and tank and demand the method＇ s rationality and feasibility.

关 键 词：SAR 回波模拟 弹跳射线法 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]