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Communication dans un congrès
Dispersive Grid-free Orthogonal Matching Pursuit for Modal Estimation in Ocean Acoustics
Abstract : Considering low-frequency acoustic sources, shallow-water environments act as modal dispersive waveguides. In this context, the signal can be described as a sum of a few modal components, each of them propagating with its own wavenumber. When dealing with broadband sources, wavenumber-frequency (f-k) diagrams constitute popular representations naturally enabling modal separation. Based on a Fourier transform, they require however a large number of sensors to resolve wavenumbers with a high-resolution. This limitation can be overcame by adding some physical priors to the processing method. In the continuation of previous works, we propose here a new grid-free algorithm allowing a super-resolution of the (f-k) diagram by benifiting from the sparse nature of the wavenumber spectrum and embedding the broadband behavior of the wavenumbers within the algorithm. The method is validated on simulated data.
Littérature citée [19 références]
https://hal.archives-ouvertes.fr/hal-02902490
Contributeur : Thierry Chonavel <>
Soumis le : lundi 20 juillet 2020 - 08:32:50
Dernière modification le : jeudi 15 octobre 2020 - 04:06:34
Contributeur : Thierry Chonavel <>
Soumis le : lundi 20 juillet 2020 - 08:32:50
Dernière modification le : jeudi 15 octobre 2020 - 04:06:34
Fichier
ICASSP2020_CPOMP.pdf
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