Adaptive channel equalization in WCDMA downlink with turbo coding (original) (raw)

Receivers based on channel equalization have proven to be one of the most promising candidates for terminal receivers in wideband code-division multiple-access (WCDMA) downlink. The channel equalizers provide multiple access interference (MAI) suppression, and thus ensure adequate receiver performance even with a high number of active users. However, the performance improvement provided by the equalizers in conjunction with a powerful forward error control (FEC) coding has been unclear. In this paper, the performance of adaptive equalizers is numerically evaluated with 1/3-rate turbo coding, and compared to the performance of the conventional Rake receiver. The numerical results show significant performance improvement over the conventional Rake receiver in a Rayleigh fading multipath channel.