基于并行双尺度射线追踪的海面电磁散射计算  

EM scattering from the sea surface based on the parallelized two scale model ray tracing

作　　者：孟肖[1] 郭立新[1] 黄青青[1] 李娟[1] 

机构地区：[1]西安电子科技大学物理与光电工程学院,西安710071

出　　处：《电波科学学报》2016年第4期725-730,共6页Chinese Journal of Radio Science

基　　金：自然科学基金杰出青年科学基金(6125002);中央高校业务费;国家自然青年基金(61501360)

摘　　要：利用一种基于双尺度模型(Two Scale Model,TSM)的射线追踪(Ray Tracing,RT)算法(TSM-RT)快速计算电大尺寸海面电磁散射,与传统的射线追踪算法相比,该算法能够有效减少射线与面元的求交次数,提高了计算效率.同时,为了进一步减少计算时间,利用图形处理单元(Graphics Processing Unit,GPU)强大的并行处理能力对TSM-RT算法进行加速.计算结果表明:基于GPU的并行TSM-RT算法与基于CPU的串行TSM-RT算法相比计算时间有了很大程度的减少,获得了很好的加速效果.This paper aims at the fast computation of the electromagnetic scattering from the large- scale sea surface by an approximate ray tracing（RT） method which is based on the two scale model（TSM- RT）. Compared with the traditional RT method, TSM-RT method can decrease the number of intersec- tions between the rays and facets, and keep a good accuracy. Therefore the computational efficiency is greatly improved. In addition, the parallelized accelerated TSM-RT method based on the graphics process- ing unit（GPU） is utilized in order to further improve the efficiency. According to the computational re- sults, it demonstrates that the computational time of the GPU-based TSM-RT method is greatly decreased compared with the CPU-based TSM-RT method, therefore a good speedup ratio is achieved.

关 键 词：双尺度射线追踪(TSM-RT) GPU 并行加速 

分 类 号：TN958[电子电信—信号与信息处理]