Parameter Estimation of Coherently Distributed Noncircular Signals

Xuemin YANG  Zhi ZHENG  Guangjun LI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E98-B   No.7   pp.1316-1322
Publication Date: 2015/07/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E98.B.1316
Type of Manuscript: PAPER
Category: Antennas and Propagation
Keyword: 
coherently distributed source,  noncircular signal,  central DOA,  angular spread,  

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Summary: 
In this paper, a new parameter estimator for coherently distributed (CD) noncircular (NC) signals is proposed, and can estimate both the central direction-of-arrivals (DOAs) and the angular spreads. It can also be considered as an extended version of the generalized Capon method by using both covariance matrix and an elliptic covariance matrix. The central DOAs and angular spreads are obtained by two-dimensional spectrum-peak searching. Numerical examples illustrate that the proposed method can estimate the central DOAs and the angular spreads when the number of signals is greater than the number of sensors. The proposed method also offers better performance than the methods against which it is compared.