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

Abstract

In this paper, we propose a pilot-channel aided pipeline scheme for interference cancellation (IC) in uplink wideband DS/CDMA system. Generally speaking, pipelined implementation is inherent in SIC but not in channel estimation. This scheme combines channel estimation and user data detection into sequential type with low complexity and leads to pipeline implementation. Besides, interference between data channel signals and pilot channel signals under multipath fading channel are 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.