Pilot-channel aided pipeline scheme for interference cancellation in uplink DS/CDMA system

Abstract

We propose a pilot-channel aided pipeline scheme for interference cancellation (IC) in the wideband DS/CDMA system uplink. Generally speaking, pipelined implementation is inherent in SIC (successive interference cancellation) but not in channel estimation. This scheme combines channel estimation and user data detection into the sequential type with low complexity and leads to pipeline implementation. Besides, interference between data channel signals and pilot channel signals under multipath fading channels is also taken into consideration. Compared with conventional channel estimation using correlator output and SIC without pilot signal remover, the proposed scheme shows better quality both on channel estimation and user data detection.