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A Low-Complexity DOA and Polarization Method of Polarization-Sensitive Array.

Wen Dong1, Ming Diao2, Lipeng Gao3

  • 1College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China. a343720065@hrbeu.edu.cn.

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|May 23, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces a low-complexity method for estimating direction of arrival (DOA) and polarization using a polarization sensitive array (PSA). The technique avoids peak searching, ensuring high accuracy and effective interference filtering for signal detection.

Keywords:
DOA estimationpolarization estimationpolarization sensitive array (PSA)quaternion

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Area of Science:

  • Electromagnetics and Signal Processing
  • Array Signal Processing
  • Antenna Theory

Background:

  • Direction of Arrival (DOA) and polarization estimation are crucial in various applications.
  • Existing methods often suffer from high complexity or limited accuracy.
  • Polarization Sensitive Arrays (PSA) offer enhanced capabilities for signal characterization.

Purpose of the Study:

  • To propose a low-complexity method for DOA and polarization estimation.
  • To improve estimation accuracy and robustness against interference.
  • To leverage half-quaternions and oblique projection operators for signal processing.

Main Methods:

  • Utilizing a polarization sensitive array (PSA) composed of cross-dipoles.
  • Developing a half-quaternions model via the Cayley-Dickson form to reduce redundancy.
  • Applying the root-MUSIC algorithm for DOA estimation.
  • Employing the generalized eigenvalue method for polarization estimation.
  • Using oblique projection operators for interference suppression.

Main Results:

  • The proposed method achieves low complexity in DOA and polarization estimation.
  • It demonstrates high estimation accuracy, outperforming traditional peak-searching algorithms.
  • Oblique projection effectively filters out decoy interference signals.
  • Simulation results validate the method's effectiveness and performance.

Conclusions:

  • The developed method provides an efficient and accurate approach for DOA and polarization estimation.
  • The half-quaternions model and oblique projection enhance signal processing capabilities.
  • This technique offers a robust solution for target signal detection in the presence of interference.