New Semi-Blind Algorithms for Space-Time Rake Receivers in WCDMA Systems

Claudio J. Bordin Jr., Luiz A. Baccal´a, Silvio E. Barbin

DOI: 10.14209/sbrt.2004.121

Evento: XXI Simpósio Brasileiro de Telecomunicações (SBrT2004)

Keywords: WCDMA long coded systems space-time rake receiver COST-259

Abstract

In this work, we examine the problem of multichannel equalization/identification for W-CDMA systems employing long codes. We develop new semi-blind algorithms and compare their performance with that exhibited by the most common approaches. We verify through numerical simulations, employing the COST-259 channel propagation model, that classical pilotbased approaches do not allow W-CDMA systems to achieve satisfactory capacity, specially in the presence of high data rate users, and that the proposed semi-blind approaches performed robustly, leading in general to much smaller error rates.

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