Direction-of-Arrival Estimation Based on Time-Modulated Coprime Arrays

Yue MA
Chen MIAO
Yuehua LI
Wen WU

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E104-A    No.2    pp.572-575
Publication Date: 2021/02/01
Publicized: 2020/08/06
Online ISSN: 1745-1337
DOI: 10.1587/transfun.2020EAL2075
Type of Manuscript: LETTER
Category: Digital Signal Processing
Keyword: 
time-modulated array,  coprime array,  DOA,  

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Summary: 
This letter proposes the use of a novel time-modulated array structure to estimate the direction of arrival (DOA). Such a time-modulated coprime array (TMCA) is obtained by exchanging a coprime array's phase shifter for a radio frequency (RF) switch. Compared with a traditional coprime array, the TMCA's structure is much simpler, and it has a higher degree of freedom and resolution compared with a time-modulated uniform linear array (TMULA) due to its exploitation of the virtual array's equivalent signals. Theoretical analysis and experimental results have validated the effectiveness of the proposed structure and method and have confirmed that a TMCA's DOA performance is better than that of a TMULA using the same number of antennas.

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