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Localisation de source par petits fonds en UBF (1-100 Hz) à l'aide d'outils temps-fréquence

Abstract : This work focuses on acoustic source localization in a shallow water waveguide using a single receiver in the ultra-low frequency regime (1-100Hz).
In this configuration the received signal can be decomposed into a set of dispersive modes.

In the first part we develop several time-frequency methods (both representations and filters) adapted to the experimental configuration which exploit the dispersion law and unitary equivalence.
These methods circumvent certain limitations encountered using classical approaches.
The methods are evaluated and compared to one another.

In the second part we concentrate on source localization in both depth and range using filtered modes.
Two original techniques to estimate separately the depth (using mode energy) and range (using mode phase) are developed and validated using real data.
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https://tel.archives-ouvertes.fr/tel-00255015
Contributor : Jean-Michel Vanpé <>
Submitted on : Wednesday, February 13, 2008 - 3:52:09 PM
Last modification on : Thursday, November 19, 2020 - 12:59:39 PM
Long-term archiving on: : Friday, September 28, 2012 - 9:45:12 AM

Identifiers

  • HAL Id : tel-00255015, version 1

Citation

Grégoire Le Touzé. Localisation de source par petits fonds en UBF (1-100 Hz) à l'aide d'outils temps-fréquence. Traitement du signal et de l'image [eess.SP]. Institut National Polytechnique de Grenoble - INPG, 2007. Français. ⟨tel-00255015⟩

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