为了对复杂目标模型进行快速估算，在介绍复杂目标的RCS计算系统emX及其所采用的物理光学方法、几何光学寻迹方法和物理绕射方法的基础上，结合图形硬件对估算进行了加速，实现了对于复杂目标模型的一次反射，多次散射和边缘绕射相结合的快速RCS计算算法。最后对实验数据进行了对比和分析，结果证明，该方法是一种有效的RCS快速估算方法。

This paper introduce a rapid RCS prediction system emX for complex targets using physical optics,geometry optics,physical theory of diffraction and graphic hardware. This paper focused on the RCS computation of electrically large,complex and perfectly targets. The faceting approach is used to model the target's geometry. This paper uses the close form solution of physical optics and the graphic hardware to accelerate RCS computation. The results show that this method is an efficient RCS rapid prediction method.