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  • Research Article
  • Open Access

Chip-Level Channel Equalization in WCDMA Downlink

  • 1Email author,
  • 1,
  • 2,
  • 2,
  • 1 and
  • 2
EURASIP Journal on Advances in Signal Processing20022002:180318

  • Received: 14 August 2001
  • Published:


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.


  • multiple-access interference
  • channel equalization

Authors’ Affiliations

Centre for Wireless Communications, University of Oulu, P.O. Box 4500, FIN-90014, Finland
Nokia Mobile Phones, P.O. Box 50, Oulu, 90571, Finland


© Hooli et al. 2002