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Positioning Combination Method of USBL Using Four-Element Stereo Array.

Wei Wang1,2,3, Min Zhu1,2,4, Bo Yang1,5

  • 1Ocean Acoustic Technology Laboratory, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China.

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Summary
This summary is machine-generated.

This study introduces a new acoustic positioning method using stereo arrays to improve underwater navigation accuracy. The enhanced ultra-short baseline system offers stable and precise location tracking across various signal incident angles.

Keywords:
combined location methodcross-planar arrayfour-element stereo arraypositioning performanceultra-short baseline (USBL)

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Area of Science:

  • Underwater acoustics
  • Array signal processing
  • Navigation systems

Background:

  • Acoustic positioning systems, particularly ultra-short baseline (USBL), face challenges with signal incident angles.
  • Existing methods exhibit degraded performance in high or low incident angle scenarios, impacting accuracy.

Purpose of the Study:

  • To propose an improved USBL combined location method using novel stereo array designs.
  • To enhance the positioning accuracy and stability of acoustic systems under diverse signal incident angles.

Main Methods:

  • Design of two novel four-element stereo arrays.
  • Introduction of a virtual array element for a regular triangular pyramid array to form a planar cross array.
  • Development of a switching strategy between traditional and new localization methods based on incident angles.

Main Results:

  • The designed arrays demonstrate stable localization capabilities across various incident angles.
  • The proposed virtual array element effectively improves performance at low incident angles.
  • Simulations confirm enhanced overall positioning performance compared to traditional methods.

Conclusions:

  • The novel stereo array designs and switching strategy significantly improve USBL positioning accuracy.
  • The method provides a robust solution for underwater acoustic localization challenges.
  • This advancement contributes to more reliable underwater navigation and tracking.