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Three-dimensional higher-order raypath separation in a shallow-water waveguide.

Longyu Jiang1, Zhe Zhang1, Philippe Roux2

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This study introduces a novel 3D higher-order raypath separation algorithm for challenging multipath environments. The method enhances resolution and robustness in underwater acoustic signal processing.

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Area of Science:

  • Oceanography
  • Acoustics
  • Signal Processing

Background:

  • Shallow-water environments present significant challenges for raypath separation due to multipath interference.
  • Colored noise in ocean environments further complicates distinguishing closely arriving raypaths.

Purpose of the Study:

  • To propose a novel three-dimensional (3D) higher-order raypath separation algorithm.
  • To address the limitations of existing methods in high-interference acoustic environments.

Main Methods:

  • Development of a 3D higher-order raypath separation technique.
  • Array-to-array configuration for enhanced data acquisition.
  • Testing with simulation, ultrasonic waveguide, and shallow-water ocean data.

Main Results:

  • The proposed algorithm demonstrates superior resolution in separating closely spaced raypaths.
  • Enhanced robustness against noise and interference in multipath environments.
  • Validation across diverse datasets, including real oceanographic data.

Conclusions:

  • The 3D higher-order raypath separation algorithm offers significant improvements over existing methods.
  • This technique is effective for analyzing acoustic signals in complex shallow-water conditions.
  • The algorithm provides a more robust solution for underwater acoustic signal processing.