An Enhanced SMLR algorithm for multipath channel estimation in downlink WCDMA

In this paper, a new algorithm for multipath channel estimation by means of the common pilot channel (CPICH) in downlink WCDMA-FDD is presented. The estimation is performed by using a single most likely replacement (SMLR) algorithm specifically derived for complex baseband signals where a Bernoulli-Gaussian (BG) model is introduced for the multipath channel. In the proposed algorithm, an interference cancelling technique is associated to the SMLR to enhance its performance. The proposed algorithm performs very well; it yields a satisfactory performance at a moderate extra computational cost compared to the SMLR