Off-grid direction-of-arrival estimation for wideband noncircular sources

Autor: Xiaoyu Zhang, Haihong Tao, Ziye Fang, Jian Xie
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: ETRI Journal, Vol 45, Iss 3, Pp 492-504 (2023)
Druh dokumentu: article
ISSN: 1225-6463
2021-0485
DOI: 10.4218/etrij.2021-0485
Popis: Researchers have recently shown an increased interest in estimating the direction-of-arrival (DOA) of wideband noncircular sources, but existing studies have been restricted to subspace-based methods. An off-grid sparse recovery-based algorithm is proposed in this paper to improve the accuracy of existing algorithms in low signal-to-noise ratio situations. The covariance and pseudo covariance matrices can be jointly represented subject to block sparsity constraints by taking advantage of the joint sparsity between signal components and bias. Furthermore, the estimation problem is transformed into a single measurement vector problem utilizing the focused operation, resulting in a significant reduction in computational complexity. The proposed algorithm's error threshold and the Cramer-Rao bound for wideband noncircular DOA estimation are deduced in detail. The proposed algorithm's effectiveness and feasibility are demonstrated by simulation results.
Databáze: Directory of Open Access Journals
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