Sequential Estimation of Angles of Arrival via Signal Subspace Projection

Yang-Ho CHOI  

IEICE TRANSACTIONS on Communications   Vol.E87-B   No.6   pp.1760-1763
Publication Date: 2004/06/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Antenna and Propagation
array signal processing,  direction estimation,  sequential estimation,  

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Sequential estimation of arrival angles allows us to resolve closely located sources that the standard MUSIC fails to do so. A new sequential estimation method is proposed which utilizes only the signal subspace components of the steering vectors for some estimates of the arrival angles. It is theoretically shown that the asymptotic performance of the proposed method is better than that of the conventional sequential method which exploits both the signal and the noise subspace components. Simulation results show that the former outperforms the latter in correlated sources as well as in uncorrelated sources.