Open AccessBi‐level JOMP for DOA estimation in coprime array with off‐grid targets
Author(s) -
Jiang Ying,
He Minghao,
Tang Yuwen,
Han Jun,
Fan Xikun
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2019.0663
Subject(s) - coprime integers , residual , computer science , algorithm , grid , matching (statistics) , direction of arrival , iterative method , mathematics , telecommunications , statistics , geometry , antenna (radio)
The direction of arrival (DOA) estimation for off‐grid targets in the coprime array, which can extend degrees of freedom, is studied. Among existing research results, joint orthogonal matching pursuit (JOMP) has obvious advantages in complexity, but drawbacks in accuracy. Therefore, a bi‐level iterative algorithm is proposed to improve estimation performance of JOMP in this study. First, JOMP is executed to obtain the initial estimations of DOAs and mismatch parameters. Then, an iterative proximity searching is implemented to update target vectors to decline the residual further. After that, on the strength of results of the secondary iteration, the signal spectrum and mismatch parameters can be obtained through exploiting LS algorithm. Simulation results verify effectiveness of the proposed algorithm.