A pipelined multi-stage parallel interference canceler for CDMA with realistic channel estimation

In this paper we propose a pipelined structure for multistage parallel interference canceler for CDMA. This structure is easy to implement, has small processing delay, and applies to multipath fading channels and asynchronous users. Bit error rate (BER) performance with realistic channel estimation is simulated and compared to the performance with ideal channel estimation. Different methods are implemented to improve the performance, such as damping the update of the soft decisions, and performing partial interference cancellation.