Enhanced Low-Redundancy Restricted Array for Direction of Arrival Estimation

Sensor arrays play a significant role in direction of arrival (DOA) estimation. Specifically, arrays with low redundancy and reduced mutual coupling are desirable. In this paper, we investigate a sensor array configuration that has a restricted sensor spacing and propose a closed-form expression. We...

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Bibliographic Details
Published in:IEEE transactions on aerospace and electronic systems 2024-11, p.1-18
Main Authors: Zhang, Shidong, Zhou, Zhengchun, Cui, Guolong, Tang, Xiaohu, Fan, Pingzhi
Format: Article
Language:English
Subjects:
Aerospace and electronic systems
Array signal processing
Couplings
Direction-of-arrival (DOA) estimation
Direction-of-arrival estimation
Estimation
low-redundancy arrays
Mutual coupling
Redundancy
Sensor arrays
Signal resolution
sparse arrays
uniform degrees of freedom (uDOFs)
Vectors
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Summary:Sensor arrays play a significant role in direction of arrival (DOA) estimation. Specifically, arrays with low redundancy and reduced mutual coupling are desirable. In this paper, we investigate a sensor array configuration that has a restricted sensor spacing and propose a closed-form expression. We also propose several classes of low redundancy (LR) arrays. Interestingly, compared with super nested arrays (SNA) and maximum inter-element spacing constraint (MISC) arrays, one of the proposed arrays (4r)-type I has a significant reduction in both redundancy ratio and mutual coupling. Numerical simulations are also conducted to verify the superiority of the proposed array over the known sparse arrays in terms of weight functions, mutual coupling matrices, uniform degrees of freedom as well and DOA estimation performance.
ISSN:0018-9251
1557-9603
DOI:10.1109/TAES.2024.3491713