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一种时域标量场平面波算法的改进方法

An Improved Method of Plane-wave Time-domain Algorithm of Scalar Field
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摘要 基于现有时域平面波(PWTD)算法,提出了一种对时域标量场平面波算法的改进方法。此方法将现有算法中的插值计算改为制表查询,并给出了其最大误差。另外,还将现有算法中转移算子中对时间求导提到算法最外层,将原先所需的(K+1)(2K+1)次FFT和IFFT计算减少为一次FFT和IFFT计算。最后算例证明当算法选取适当参数值时,可获得需要的计算精度,并验证了改进算法所需计算时间远少于现有算法。 An improved method of plane-wave time-domain algorithm(PWTD) of scalar field based on the present PWTD algorithm is presented.With this method,computation of interpolated function was transformed to tabulation of the interpolated function,and the maximum error was presented.Additionally the derivative operation in translation operator was placed on the outermost,which reduces original(K+1)(2K+1) times operation of FFT and IFFT to one time.Consequently the cost associated with the computation was decreased.Two examples were presented to demonstrate the accuracy and high efficiency of the improved algorithm.
作者 刘锋 周东明 贺文辉 任猛 何建国
机构地区 国防科技大学电子科学与工程学院
出处 《国防科技大学学报》 EI CAS CSCD 北大核心 2007年第5期81-84,共4页 Journal of National University of Defense Technology
关键词 时域平面波(PWTD) 标量场 转移算子 plane-wave time-domain(PWTD) scalar field translation operator
分类号 TN95 [电子电信—信号与信息处理]
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国防科技大学学报
2007年 第5期

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