Estimation of Direction of Arrival Using Weighted Subspace Fitting for Wireless Communications

Suk Chan KIM  Iickho SONG  

IEICE TRANSACTIONS on Communications   Vol.E88-B   No.9   pp.3717-3724
Publication Date: 2005/09/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.9.3717
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
direction of arrival,  weighted subspace fitting,  mobile communication,  

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Estimation of unknown signal parameters with sensor array measurements has been investigated quite extensively. Also, there has been in recent years an explosive increase in the number of mobile users in wireless cellular systems, thus contributing to growing levels of multi-user interference. To overcome this problem, application of adaptive antenna array techniques to further increase the channel capacity has been discussed. In this paper, a new model of locally scattered signals in the vicinity of mobiles is proposed by defining the mean steering vector and manipulate it mathematically for several distributions. Under this model an estimation method of the direction of arrival is investigated based on a weighted subspace fitting technique. Statistical analysis and simulations are also considered.