An efficient higher-order PML in WLP-FDTD method for time reversed wave simulation

被引：10

作者：

Wei, Xiao-Kun ^{[1
]}

Shao, Wei ^{[1
]}

Ou, Haiyan ^{[1
]}

Wang, Bing-Zhong ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Phys Elect, Chengdu, Peoples R China

来源：

JOURNAL OF COMPUTATIONAL PHYSICS | 2016年 / 321卷

基金：

中国国家自然科学基金;

关键词：

Channel characteristics; Finite-difference time-domain (FDTD); Higher-order; Laguerre polynomials; Perfectly matched layer (PML); Time reversal (TR); FREQUENCY SHIFTED PML; IMPLEMENTATION; MEDIA; ALGORITHM; EQUATIONS; CHANNELS; CFS;

D O I：

10.1016/j.jcp.2016.06.032

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

Derived from a stretched coordinate formulation, a higher-order complex frequency shifted (CFS) perfectly matched layer (PML) is proposed for the unconditionally stable finite-difference time-domain (FDTD) method based on weighted Laguerre polynomials (WLPs). The higher-order PML is implemented with an auxiliary differential equation (ADE) approach. In order to further improve absorbing performance, the parameter values of stretching functions in the higher-order PML are optimized by the multi-objective genetic algorithm (MOGA). The optimal solutions can be chosen from the Pareto front for trading-off between two independent objectives. It is shown in a numerical test that the higher-order PML is efficient in terms of attenuating propagating waves and reducing late time reflections. Moreover, the higher-order PML can be placed very close to the wall when analyzing the channel characteristics of time reversal (TR) waves in a multipath indoor environment. Numerical examples of TR wave propagation demonstrate the availability of the proposed method. (C) 2016 Elsevier Inc. All rights reserved.

引用

页码：1206 / 1216

页数：11

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