Non-circular Coherent Signal DOA Estimation Based on Block Diagonal Spatial Smoothing Mechanism

doi:10.1007/s00034-025-03253-z

	Non-circular Coherent Signal DOA Estimation Based on Block Diagonal Spatial Smoothing Mechanism
	Dong, Xudong 1; Zhang, Yongkui 1; Qiu, Jibin 2; Zhao, Jun 3; Liu, Hao 1; Luo, Jie 1; Yang, Xu 4; Lu, Yu 1
	2025-07-23
发表期刊	CIRCUITS SYSTEMS AND SIGNAL PROCESSING
ISSN	0278-081X
页码	21
摘要	In coherent signal direction of arrival (DOA) estimation, traditional decoherence methods often suffer from limited performance because of array aperture shrinkage. While non-circular signals can enhance virtual aperture through covariance matrix expansion, their non-circular phase characteristics can disrupt conventional spatial smoothing algorithms. To address this issue, this paper proposes a novel block diagonal spatial smoothing (BSS) mechanism applied to the extended covariance matrix, which simultaneously enhances the effective array aperture while avoiding the interference of the non-circular phase on the smoothing process. Moreover, since the two-dimensional MUSIC space spectrum requires a two-dimensional search for non-circular phases and DOA, which increases the computational complexity of the subsequent DOA estimation, then the reduced dimensional MUSIC algorithm is employed. Finally, a detailed derivation of the Cramer-Rao bound for non-circular coherent signals is provided. Simulation results demonstrate that the BSS mechanism improves the performance of the classical and state-of-the-art spatial smoothing algorithms compared to circular coherent signals-based algorithms.
关键词	DOA estimation Coherent signal Non-circular phase Block diagonal spatial smoothing
DOI	10.1007/s00034-025-03253-z
收录类别	SCI
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Electrical & Electronic
WOS记录号	WOS:001535089300001
出版者	SPRINGER BIRKHAUSER
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/42041
专题	中国科学院计算技术研究所期刊论文_英文
通讯作者	Zhao, Jun
作者单位	1.Hangzhou Dianzi Univ, Coll Commun Engn, Hangzhou 310018, Peoples R China 2.Chinese Acad Sci, Inst Comp Technol, Beijing 100190, Peoples R China 3.China Jiliang Univ, Coll Informat Engn, Hangzhou 310018, Peoples R China 4.Nantong Univ, Sch Informat Sci & Technol, Nantong 226019, Peoples R China
推荐引用方式 GB/T 7714	Dong, Xudong,Zhang, Yongkui,Qiu, Jibin,et al. Non-circular Coherent Signal DOA Estimation Based on Block Diagonal Spatial Smoothing Mechanism[J]. CIRCUITS SYSTEMS AND SIGNAL PROCESSING,2025:21.
APA	Dong, Xudong.,Zhang, Yongkui.,Qiu, Jibin.,Zhao, Jun.,Liu, Hao.,...&Lu, Yu.(2025).Non-circular Coherent Signal DOA Estimation Based on Block Diagonal Spatial Smoothing Mechanism.CIRCUITS SYSTEMS AND SIGNAL PROCESSING,21.
MLA	Dong, Xudong,et al."Non-circular Coherent Signal DOA Estimation Based on Block Diagonal Spatial Smoothing Mechanism".CIRCUITS SYSTEMS AND SIGNAL PROCESSING (2025):21.