Abstract : 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.
https://hal-enac.archives-ouvertes.fr/hal-02346081 Contributeur : Rémi DouvenotConnectez-vous pour contacter le contributeur Soumis le : mardi 5 novembre 2019 - 09:59:54 Dernière modification le : mercredi 3 novembre 2021 - 05:38:46 Archivage à long terme le : : jeudi 6 février 2020 - 19:43:39