2023_programme: Real-time simulation of sensors reverberation time-series with a moving sonar array

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  • Session: 13. Sonar Performance Modelling and Verification: Applications to Active and Passive Sonar
    Organiser(s): Mathieu Colin, Mark Prior, Kevin Heaney and Dale Ellis
  • Lecture: Real-time simulation of sensors reverberation time-series with a moving sonar array [invited]
    Paper ID: 2043
    Author(s): Blachet Antoine, Cristol Xavier
    Presenter: Blachet antoine
    Abstract: Fast simulation of time-series output from the individual hydrophones of a moving sonar array is of high interest when developing and implementing new sonar algorithms, in embedded applications or in training contexts. In the special case of ASW low frequency active sonar, dominating interferences are reverberation and clutter arising from the underwater environment. Modelling realistically this key effect is a challenging task in term of computational complexity and time, especially when considering modern Doppler sensitive waveforms. \n\nThis paper illustrates a new method for generating efficiently reverberation time-series on hydrophones, based on a sparse representation of the impulse response between sonar and reverberating seabed or surface facets. The technique is designed to handle diverse Doppler sensitive waveforms, array geometry, self-induced Doppler and sonar motion. Underwater propagation is modelled with a Thales proprietary ray module: RAMSES, which inputs various environmental parameters, such as sound speed profile, maps of seabed depth and sediment nature, etc...\n\nWe assess the benefit of the method by simulating a reverberation-limited dataset from the open literature. Comparison versus real data indicates a reasonable level of similarity with the energy distribution of the simulated signals. Moreover, the statistical validation of the matched-filter reverberation envelope ensures to control false alarm rates realistically.
      Download the full paper
  • Corresponding author: Dr Antoine Blachet
    Affiliation: Thales DMS France
    Country: France
    e-mail:

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