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DOA Estimation for Coherent Sources Based on Uniformly Distributed Two Concentric Rings Array.

Chuang Han1, Shenghong Guo1, Ning Yan1

  • 1Heilongjiang Province Key Laboratory of Laser Spectroscopy Technology and Application, Harbin University of Science and Technology, Harbin 150080, China.

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Summary
This summary is machine-generated.

This study introduces a new method for estimating the direction of arrival (DOA) for coherent sources using uniform circular arrays. The enhanced algorithm improves localization accuracy for broadband signals.

Keywords:
DOAcoherent sourcesconcentric rings array

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Area of Science:

  • Signal Processing
  • Array Signal Processing
  • Acoustics

Background:

  • Traditional uniform circular array algorithms struggle with accurate direction of arrival (DOA) estimation for coherent sources.
  • Existing methods exhibit low localization accuracy and poor performance with coherent signals.

Purpose of the Study:

  • To propose a novel two-dimensional DOA estimation algorithm for coherent sources in broadband signals.
  • To address the limitations of traditional algorithms in accurately locating coherent sound sources.

Main Methods:

  • Estimating the central frequency of coherent sound sources using delayed data frequency estimation.
  • Constructing a real-valued beamformer based on the multiloop phase mode concept.
  • Obtaining a cost function in beam space and performing a two-dimensional search for source localization.

Main Results:

  • Simulations conducted at various frequencies and signal-to-noise ratios demonstrate the algorithm's effectiveness.
  • The proposed method achieves high precision in direction of arrival estimation.
  • Analysis of circular array resolution indicates successful performance.

Conclusions:

  • The developed algorithm significantly enhances the accuracy of DOA estimation for coherent sources.
  • The proposed method provides a robust solution for broadband DOA estimation challenges.
  • The findings confirm the algorithm's capability to achieve desired localization results.