基于图形电磁学的雷达散射截面计算方法改进  

Improvement of graphical electromagnetic computing method for radar cross section

作　　者：刘立国[1] 张国军[2] 莫锦军[1] 袁乃昌[1] 

机构地区：[1]国防科技大学电子科学与工程学院微波中心,湖南长沙410073 [2]空军雷达学院黄陂校区雷达维修教研室,湖北武汉430435

出　　处：《电波科学学报》2012年第6期1146-1151,共6页Chinese Journal of Radio Science

摘　　要：图形电磁学(GRECO)可以高效计算电大目标雷达散射截面(RCS)。但传统GRECO算法无法直接计算双站RCS和仿真多次反射,存在计算精度依赖屏幕分辨率的缺点。文中提出了基于渲染后的像素信息还原目标几何信息的方法,使其能够计算双站RCS,并结合弹跳射线法(SBR)计入多次反射的影响。同时,研究基于帧缓存对象(FBO)的离屏GRECO方法,克服了其计算精度依赖屏幕分辨率的缺点。Graphical electromagnetic computing（GRECO）is one of the most promising methods to simulate the electrically large object scattering. But traditional GRECO algorithm can not directly calculate the bistatic RCS and multiple reflections. Moreover, the calculation accuracy is limited by the screen resolution. This paper presents a new method to reconstruct the geometric information from the informa tion of pixels, by which the bistatic RCS and multiple reflections can be easily calculated accompanied with SBR. Meanwhile,by using the off-screen frame buffer obj ect （FBO） method, GRECO ＇ s shortcoming of its calculation accuracy being depend ent on the screen resolution is overcome.

关 键 词：图形电磁学 双站雷达散射截面 射线追踪 帧缓存对象 离屏计算 

分 类 号：TN911[电子电信—通信与信息系统]