大尺度粗糙地面的电磁散射特性
Properties of electromagnetic scattering at large-scale rough ground
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摘要: 综合考虑空间区域分割、消息传递、负载平衡及同步和边界处理等因素，给出了计算随机粗糙地面电磁散射的并行时域有限差分算法流程，并在大型高性能并行机上应用。理论分析和仿真结果表明：该算法可以快速准确地计算大尺度随机粗糙地面的电磁散射特性；通过与经典解析方法的比较，验证了该算法的正确性和实用性，在大尺度情况下拟合结果更好，更能体现地面的统计特性。Abstract: Considering region segmentation, message transmission, load balancing, synchronization, etc, the paper presents a parallel finite-difference time-domain algorithm to calculate the electromagnetic scattering at randomly rough surface and applies the algorithm to high performance parallel computers. Theoretical analysis and simulation show that, the algorithm can calculate electromagnetic scattering at large-scale random rough ground fast and efficiently. Its correctness and feasibility are verified by comparison with analytic method under the same conditions, and its large-scale results are better to reflect the ground statistical characteristics.
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