2023_programme: Deconvolution of the waveguide impulse response for source localization at low frequency

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  • Session: 04. Inverse Problems in Acoustical Oceanography
    Organiser(s): Julien Bonnel and Stan Dosso
  • Lecture: Deconvolution of the waveguide impulse response for source localization at low frequency
    Paper ID: 1953
    Author(s): Le Courtois Florent, Kinda G. Bazile
    Presenter: Le Courtois Florent
    Abstract: In shallow water and at low frequency, acoustic propagation is generally described by normal mode theory, the acoustic pressure being a sum of propagating modes. Source localization is usually performed using matched-mode processing, based on an a priori knowledge of the environment. This work considers the use of horizontal linear arrays to perform source localization in the azimuth and range dimension. The deconvolution of the waveguide impulse response from the array measurements is investigated to improve the localization accuracy. The deconvolution is performed using the Orthogonal Matching Pursuit algorithm, suitable when the number of sources is small compared to the number of the channels of the horizontal line array. Numerical simulations for Pekeris waveguides highlight good localization accuracy at various frequencies and some robustness to environmental mismatches. Results from measurement campaign, involving large horizontal line array, low to ultra-low frequency and water depth up to 1500 m are investigated as well.
  • Corresponding author: Dr Florent Le Courtois
    Affiliation: DGA TN
    Country: France
    e-mail:

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