An Improved Rake Receiver Algorithm of the CDMA System

In order to suppress the multipath interference in the CDMA system, an improved Rake receiver based on parallel multipath interference cancellation technique (PMPIC) is proposed in this paper. The cause of multipath interference and multi-user access interference is first analysed. Next an improved Rake receiver is given a theoretical analysis and its simplification algorithm is also proposed. The PMPIC is studied by Monte Carlo simulation under different channel environments. Theoretical analysis and computer simulations illustrate that the improved Rake receiver can give significant improvement when compared with the conventional Rake receiver.