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Summary
This summary is machine-generated.

A horizontal array effectively tracks surface ships using blind deconvolution and array invariant, providing accurate range and bearing estimation. This method shows promise for localizing multiple vessels in shallow waters.

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Area of Science:

  • Ocean acoustics
  • Signal processing
  • Array signal processing

Background:

  • Vertical arrays have successfully localized surface ships using blind deconvolution and array invariant in shallow water.
  • Blind deconvolution and array invariant are established techniques for acoustic source localization.

Purpose of the Study:

  • To investigate the efficacy of a bottom-mounted horizontal array for blind deconvolution and source localization.
  • To assess the performance of a horizontal array in estimating source range and bearing using array invariant.
  • To explore the potential for simultaneous localization of multiple surface ships.

Main Methods:

  • Utilized a 60-m long, bottom-mounted horizontal array for blind deconvolution to extract Green's functions (100-800 Hz).
  • Applied the array invariant technique in conjunction with blind deconvolution for source range estimation.
  • Extracted source bearing (azimuth angle) using well-resolved ray angles from blind deconvolution.
  • Compared localization and bearing estimation results with Global Positioning System (GPS) data.

Main Results:

  • The horizontal array successfully performed blind deconvolution and provided source range estimates.
  • Tracking performance showed good agreement with GPS measurements ( < 11% standard deviation of relative range error at 0.3-1.5 km).
  • Source bearing estimations agreed excellently with GPS data, except near the array's endfire due to lower angular resolution.

Conclusions:

  • A bottom-mounted horizontal array is a viable tool for blind deconvolution and acoustic source localization in shallow water.
  • The method provides accurate range and bearing information, complementing existing techniques.
  • The approach demonstrates potential for multi-target tracking and warrants further investigation for improved angular resolution.