Hybrid uplink multi-carrier CDMA interference-cancellation receiver

A novel interference cancellation detector, which combines an initial phase of cancelling one or more users per iteration depending on the tentative d ecision metrics, followed by maximum likelihood detection for the last few users, is proposed for multi-carrier CDMA uplink communication. Simulation results compare the system with a number of other multi-user detection rece ivers for an uplink multipath multi-user problem. The number of iterations and computation complexity are compared with a successive interference canc ellation approach. The influence of the near-far effect and of poor channel estimation is also investigated.