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Range estimation of a moving source using interference patterns in deep water.

Yuhan Liu1, Lianghao Guo1, Weiyu Zhang1

  • 1State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China liuyuhan@mail.ioa.ac.cn; glh2002@mail.ioa.ac.cn; zwy@mail.ioa.ac.cn; yanchao@mail.ioa.ac.cn; dongge@mail.ioa.ac.cn.

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This summary is machine-generated.

This study reveals how to estimate underwater acoustic source range using narrowband signals. Analyzing depth-time interference patterns reveals multipath arrival angles for stable range estimations.

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Area of Science:

  • Underwater acoustics
  • Acoustic signal processing
  • Oceanography

Background:

  • Acoustic field interference patterns in deep water shadows correlate with source location.
  • Extracting these patterns typically requires broadband sources and fails for narrowband signals.

Purpose of the Study:

  • Investigate narrowband depth-time interference patterns from a moving acoustic source.
  • Develop a method for stable source range estimation using these patterns.

Main Methods:

  • Derived two types of time intervals from observed depth-time interference patterns based on ray theory.
  • Correlated these time intervals with multipath arrival angles.
  • Utilized simulations and experimental data for validation.

Main Results:

  • Identified specific time intervals within narrowband acoustic signals that contain range-dependent information.
  • Demonstrated a correlation between these time intervals and multipath arrival angles.
  • Achieved stable source range estimations using the derived interference patterns.

Conclusions:

  • Narrowband depth-time interference patterns can be effectively utilized for underwater acoustic source localization.
  • The developed method offers a robust approach for range estimation in scenarios where broadband signals are not feasible.