A Simple Multistage Multiuser Receiver for UMTS-CDMA Systems

In this paper, we present a new subsymbol-based multistage multiuser receiver using partial parallel interference cancellation (PPIC) scheme for uplink multirate wideband UMTS-CDMA signals over a multipath fading channel. The multiuser detection process will take place during the window of the highest-rate user´s symbol period which makes the proposed scheme more feasible to be implementated compared to the recently-proposed methods. Through numerical simulations, it will be shown that a considerable improvement in performance is gained through the stages of interference cancellation.