Modeling the long-range wave propagation by a split-step wavelet method

JOURNAL OF COMPUTATIONAL PHYSICS

卷:402

Article

Zhou, Hang^1,2,3  Douvenot, Remi¹  Chabory, Alexandre¹ 

[1] Univ Toulouse, TELECOM EMA, ENAC, Toulouse, France

[2] CAUC, Sino European Inst Aviat Engn SIAE, Tianjin, Peoples R China

[3] CAUC, CAUC ENAC Joint Res Ctr Appl Math Air Traff Manag, Tianjin, Peoples R China

关键词: Propagation;    Fast wavelet transform;    Split-step method;    Electromagnetics;    Fourier transform;    Refraction;   

DOI  :  10.1016/j.jcp.2019.109042

来源: Elsevier

【 摘 要 】

A split-step wavelet method for simulating the long-range wave propagation is introduced. It is based on the fast wavelet transform. Compared to the split-step Fourier method, this method improves the computation efficiency while keeping a good accuracy. The propagation is performed iteratively by means of a pre-computed matrix containing the individual propagations of the wavelets. A fast computation method of this matrix is also presented. For the radiowave propagation in the low troposphere, a local image method is proposed to account for an impedance ground. Inhomogeneous atmospheres and irregular grounds are also considered. Finally, numerical tests of long-range propagations are performed to show the accuracy and time efficiency of this method. (C) 2019 Elsevier Inc. All rights reserved.

【 授权许可】

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