Closed-Form Space-Time Channel Blind Estimation for Space-Time Coded MC-CDMA Systems

Yanxing ZENG  Qinye YIN  

Publication
IEICE TRANSACTIONS on Communications   Vol.E88-B   No.7   pp.3050-3056
Publication Date: 2005/07/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.7.3050
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
MC-CDMA,  space-time channel,  antenna array,  direction of arrival,  

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Summary: 
In this letter, we propose a closed-form joint space-time channel and direction of arrival (DOA) blind estimation algorithm for space-time coded MC-CDMA systems equipped with a uniform linear array (ULA) at the base station in frequency-selective fading environments. We prove that the signal subspaces defined by the receive data covariance matrix can be determinately separated into an equivalent set of signal subspaces spanned by the space-time channel vector of an individual user. From these signal subspaces, the space-time channels of multiple users are estimated using the subspace method.