Systems Engineering and Electronics ›› 2024, Vol. 46 ›› Issue (11): 3631-3638.doi: 10.12305/j.issn.1001-506X.2024.11.05

• Electronic Technology • Previous Articles     Next Articles

Fast and high precision DOA estimation algorithm based on sparse recovery

Lutao LIU, Guoheng XU, Zhen WANG   

  1. College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China
  • Received:2023-09-20 Online:2024-10-28 Published:2024-11-30
  • Contact: Lutao LIU

Abstract:

The conventional direction of arrival (DOA) estimation algorithm based on sparse recovery uses dense sampling grids, resulting in significantly increased computational complexity and low estimation accuracy for adjacent signals. To address this issue, this manuscript proposes a fast and high accuracy DOA estimation algorithm. Firstly, starting from sparse grids, the grid evolution method is used to reduce the total number of grid points. Noise variance and signal power are estimated again, then use off-grid root sparse Bayesian learning (OGRSBL) technique to calculate the accurate estimation of incident angle. Simulation results show that compared to conventional sparse Bayesian learning algorithms, the proposed algorithm has higher computational efficiency with higher accuracy for closely spaced signals.

Key words: direction of arrival (DOA) estimation, off-grid, grid evolution, sparse Bayesian learning (SBL)

CLC Number: 

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