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A Robust Direction of Arrival Estimation Method for Uniform Circular Array.

Zhengqin Xu1,2, Shiqian Wu3, Zhuliang Yu4

  • 1School of Machinery and Automation, Wuhan University of Science and Technology, Wuhan 430081, China. xuzhengqin@wust.edu.cn.

Sensors (Basel, Switzerland)
|October 17, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces RAN-ESPRIT, a robust method for Direction of Arrival (DOA) estimation. It accurately determines source signal locations even in noisy, reverberant conditions by combining ESPRIT with RANSAC for outlier removal.

Keywords:
DOA estimationESPRIT algorithmRANSAC algorithmuniform circular array

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Area of Science:

  • Array signal processing
  • Acoustic signal analysis
  • Statistical signal processing

Background:

  • Direction of Arrival (DOA) estimation is fundamental in array signal processing.
  • Existing DOA methods struggle with accuracy and reliability in noisy and reverberant environments.
  • Real-world applications demand robust DOA estimation techniques.

Purpose of the Study:

  • To propose an accurate and robust method for estimating the DOA of source signals.
  • To address the limitations of traditional DOA estimation techniques in adverse conditions.
  • To enhance the reliability of DOA estimation in practical scenarios.

Main Methods:

  • A novel RAN-ESPRIT method is developed by integrating the Estimating Signal Parameters via Rotational Invariance Techniques (ESPRIT) algorithm with the RANdom SAmple Consensus (RANSAC) algorithm.
  • A uniform circular array (UCA) is transformed into a virtual uniform linear array (ULA).
  • The covariance matrix of received signals is reconstructed, initial DOA is estimated using ESPRIT, and a modified RANSAC with automatic thresholding refines the DOA estimation.

Main Results:

  • The RAN-ESPRIT method effectively removes outliers and unreliable DOA feature data.
  • The proposed method achieves more accurate DOA estimation in reverberation environments.
  • Experimental results show superior robustness and efficiency compared to traditional ESPRIT and TLS-ESPRIT methods.

Conclusions:

  • The RAN-ESPRIT method provides a significant advancement in DOA estimation accuracy and robustness.
  • This technique is particularly effective in overcoming challenges posed by noise and reverberation.
  • The findings suggest practical applicability in various array signal processing scenarios.