The most important third generation (3G) cellular communications standard is based on wideband CDMA (WCDMA). Receivers based on TDMA style channel equalization at the chip level have been proposed for a WCDMA downlink employing long spreading sequences to ensure adequate performance even with a high number of active users. These receivers equalize the channel prior to despreading, thus restoring the orthogonality of users and resulting in multiple-access interference (MAI) suppression. In this paper, an overview of chip-level channel equalizers is delivered with special attention to adaptation methods suitable for the WCDMA downlink. Numerical examples on the equalizers′ performance are given in Rayleigh fading frequency-selective channels.
This article is part of the series 3G Wireless Communications and Beyond.
Chip-Level Channel Equalization in WCDMA Downlink
1 Centre for Wireless Communications, P.O. Box 4500 FIN-90014, University of Oulu, Finland
2 Nokia Mobile Phones, P.O. Box 50, Oulu 90571, Finland
EURASIP Journal on Advances in Signal Processing 2002, 2002:180318 doi:10.1155/S1110865702000914
The electronic version of this article is the complete one and can be found online at: http://asp.eurasipjournals.com/content/2002/8/180318
|Received:||14 August 2001|
|Revisions received:||7 March 2002|
|Published:||12 August 2002|
© 2002 Hooli et al.