Underdetermined Direction of Arrival Estimation Based on Signal Sparsity

Peng LI  Zhongyuan ZHOU  Mingjie SHENG  Peng HU  Qi ZHOU  

Publication
IEICE TRANSACTIONS on Communications   Vol.E102-B   No.10   pp.2066-2072
Publication Date: 2019/10/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2018EBP3365
Type of Manuscript: PAPER
Category: Antennas and Propagation
Keyword: 
direction of arrival (DOA),  single source point detection,  signal sparsity,  forward and backward vectors,  

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Summary: 
An underdetermined direction of arrival estimation method based on signal sparsity is proposed when independent and coherent signals coexist. Firstly, the estimate of the mixing matrix of the impinging signals is obtained by clustering the single source points which are detected by the ratio of time-frequency transforms of the received signals. Then, each column vector of the mixing matrix is processed by exploiting the forward and backward vectors in turn to obtain the directions of arrival of all signals. The number of independent signals and coherent signal groups that can be estimated by the proposed method can be greater than the number of sensors. The validity of the method is demonstrated by simulations.