Blind channel estimation for space-time coded WCDMA

A new blind channel estimation technique is proposed for space-time coded wideband CDMA systems using aperiodic and possibly multirate spreading codes. Using a decorrelating front end, the received signal is projected onto a subspace from which channel parameters can be estimated up to a rotational ambiguity. Exploiting the subspace structure of the WCDMA signaling and the orthogonality of the unitary space-time codes, the proposed algorithm provides a blind channel estimate via least squares. A new identifiability condition is established under the assumption that the system is not heavily loaded. The mean square error of the estimated channel is compared with the Cramér-Rao bound, and the bit error rate (BER) performance of the proposed algorithm is compared with that of differential schemes. © 2004 Hindawi Publishing Corporation.
Publisher
Hindawi Publishing Corporation
Issue Date
2004-12
Language
ENG
Citation

EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING, v.2004, no.2, pp.322 - 334

ISSN
1687-1472
URI
http://hdl.handle.net/10203/184
Appears in Collection
EE-Journal Papers(저널논문)
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