PC集群MPI并行矩量法研究一维大尺度粗糙面掠入射电磁散射特性.pdfVIP

PC集群MPI并行矩量法研究一维大尺度 粗糙面掠入射电磁散射特性 郭立新 麻军 王安琪 （西安电子科技大学理学院，西安 710071) lxguo@mail.xidian.edu.cn 摘 要：基于 PC 集群 MPI 并行平台，利用并行矩量法来研究一维大尺度高斯导体粗糙面掠入射时的电磁散射特性。根据 MPI 平台的特点，对求解矩量法矩阵方程的共轭梯度法进行并行化。通过进行数值试验验证了该方法的并行计算有效性与效 率，并证明该方法为一维大尺度粗糙面电磁散射问题的求解提供了新思路。最后讨论了均方根高度、相关长度、以及极化方 式对电磁波掠入射时粗糙面双站散射系数的影响。 关键词：粗糙面，电磁散射，并行矩量法，MPI ，PC 集群，掠入射 Study on 1-D Large Scale Rough Surface EM Scattering at Low Grazing Incidence by Parallel MOM Based on MPI of PC Clusters GUO Li-xin, MA Jun, WANG An-qi （School of Science, Xidian University, Xi’an 710071） Abstract: Based on message passing interface (MPI) of the PC Clusters, the parallel method of moment (MOM) is investigated for the electromagnetic (EM) scattering from one dimensional (1-D) large scale PEC Gaussian rough surface at low grazing incident angle. The conjugate gradient method (CGM) for solving MOM matrix equation is parallelized according to the property of MPI in this work. The parallel computational efficiency and effectivity are then validated by several numerical experiments, in which it is proved that the proposed method supplies a novel technique for solving 1-D large scale rough surface EM-scattering problem. Finally the influences of root mean square (rms) height, the correlation length and the polarization on the bistatic scattering coefficient (BSC) for low grazing incidence are also discussed. Keywords: rough surface, EM-scattering, parallel MOM, MPI, PC Clusters, low grazing incidence. 研究掠入射问题时，必须模拟足够长的粗糙面， 1 引言 电磁波掠入射时，粗糙地海面的电磁散射特性 这样就会引入大量的未知数，这在单个PC机上是 的研究越来越被人们所重视，如海面上低飞目标的 无法求解的。本文根据PC 集群消息传递界面 跟踪，陆基雷达对舰船目标的探测，掠入射时海上 (Message Passing Int