Journal of Systems Engineering and Electronics ›› 2025, Vol. 36 ›› Issue (5): 1122-1131.doi: 10.23919/JSEE.2025.000052

• ELECTRONICS TECHNOLOGY • Previous Articles    

DOA estimation based on sparse Bayesian learning under amplitude-phase error and position error

Yijia DONG(), Yuanyuan XU(), Shuai LIU(), Ming JIN()   

  • Received:2023-11-20 Accepted:2025-06-24 Online:2025-10-18 Published:2025-10-24
  • Contact: Shuai LIU E-mail:yijiadong99@163.com;xuyuanyuan626@163.com;liu-shuai@hit.edu.cn;jinming0987@163.com
  • About author:
    DONG Yijia was born in 1999. He received his M.S. degree in Harbin Institute of Technology in 2023, majoring in information and communication engineering. His research interest is array signal processing. E-mail: yijiadong99@163.com

    XU Yuanyuan was born in 2000. She received her M.S. degree from Harbin Institute of Technology in 2025, majoring in Information and Communication Engineering. Her research interest is array signal processing. E-mail: xuyuanyuan626@163.com

    LIU Shuai was born in 1980. He received his B.S. and M.S. degrees from Northwestern Polytechnical University, Xi’an, China, in 2002 and 2005, respectively. He received his Ph.D. degree from Harbin Institute of Technology, Harbin, China, in 2013. He is a professor at Harbin Institute of Technology (Weihai). His research interests are conformal array, polarization sensitive array intelligent optimization, polarization-DOA parameter estimation method, conventional array and polarization sensitive array robust beamforming method, and radar electronic countermeasures. E-mail: liu-shuai@hit.edu.cn

    JIN Ming was born in 1968. He received his B.S., M.S., and Ph.D. degrees from Harbin Institute of Technology, Harbin, China, in 1990, 1998 and 2004, respectively. He is a professor at Harbin Institute of Technology (Weihai). His research interest is radar signal processing. E-mail: jinming0987@163.com
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (62071144).

Abstract:

Most of the existing direction of arrival (DOA) estimation algorithms are applied under the assumption that the array manifold is ideal. In practical engineering applications, the existence of non-ideal conditions such as mutual coupling between array elements, array amplitude and phase errors, and array element position errors leads to defects in the array manifold, which makes the performance of the algorithm decline rapidly or even fail. In order to solve the problem of DOA estimation in the presence of amplitude and phase errors and array element position errors, this paper introduces the first-order Taylor expansion equivalent model of the received signal under the uniform linear array from the Bayesian point of view. In the solution, the amplitude and phase error parameters and the array element position error parameters are regarded as random variables obeying the Gaussian distribution. At the same time, the expectation-maximization algorithm is used to update the probability distribution parameters, and then the two error parameters are solved alternately to obtain more accurate DOA estimation results. Finally, the effectiveness of the proposed algorithm is verified by simulation and experiment.

Key words: direction of arrival estimation (DOA), amplitude and phase error, array element position error, sparse Bayesian