DOA estimation based on smoothed sparse reconstruction with time-modulated linear arrays

被引：0
|
作者：
Yin, Yongtai [1 ]
Wang, Yuexian [1 ]
Dai, Tiantian [1 ,2 ]
Wang, Ling [1 ]
机构：
[1] Northwestern Polytech Univ, Sch Elect & Informat, Xian 710072, Peoples R China
[2] Nanjing Zhongxing New Software Co Ltd, Nanjing 210012, Peoples R China
来源：
SIGNAL PROCESSING | 2024年 / 214卷
基金：
中国国家自然科学基金;
关键词：
Direction of arrival (DOA); Time-modulated linear arrays (TMLA); Single-channel receiver; Sparse reconstruction; DIRECTION-OF-ARRIVAL; SIDE-BAND SUPPRESSION; SIGNAL RECONSTRUCTION; DECOMPOSITION; COVARIANCE; PARAMETERS;
D O I：
10.1016/j.sigpro.2023.109229
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A novel direction of arrival (DOA) estimation method based on smoothed sparse reconstruction with time-modulated linear arrays (TMLA) is proposed in this paper. With the analysis of the noise variation after time modulation, a closed-form expression for the noise covariance under the optimized unidirectional phase center motion time sequence scheme is derived. Then a reweighted continuous function is designed for the smooth approximation to l(0)-norm based on the orthogonality between the signal subspace and the noise subspace. Simulation results demonstrate that, compared with conventional DOA estimation method with time-modulated arrays, the proposed method possesses higher estimation accuracy and lower computational complexity, especially for the scenario with small snapshot and low signal-to-noise ratio.
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收藏
页数：10
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