SEMIBLIND CHANNEL ESTIMATION FOR SPACE-TIME CODED WCDMA

A new semi-blind channel estimation technique is proposed for space-time coded wideband CDMA systems using aperiodic and possibly multirate spreading codes. Exploiting the subspace structure of the WCDMA signaling and the orthogonality of the space-time code, the proposed algorithm provides the least squares channel estimate in closed form. Using a decorrelating matched filter, the proposed method projects the received signal into subspaces from which channel parameters and data symbols can be estimated jointly. A new blind identifiability condition is established. The mean square error of the estimated channel is compared with the Cram´er-Rao bound, and bit error rate (BER) is assessed through Monte Carlo simulation.
Publisher
IEEE
Issue Date
2002-11
Keywords

semi-blind channel estimation; space-time coded WCDMA

Citation

Signals, Systems and Computers, 2002. Conference Record of the Thirty-Sixth Asilomar Conference on, v.2, pp.1637-1641

ISSN
1058-6393
URI
http://hdl.handle.net/10203/354
Appears in Collection
EE-Conference Papers(학술회의논문)
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