Hybrid Successive Interference Cancellation Multi-user Detector for WCDMA Uplink System

Successive interference cancellation (SIC) and parallel interference cancellation (PIC) are promising nonlinear multi-user detection techniques for code division multiple access (CDMA). It has previously been shown that PIC has the high bit error rate (BER) diffuseness of weak users and large hardware logic resources consumption and SIC suffers mightily from a high processing delay and ranks the sequence of received users frequently. The paper presents the hybrid SIC (HSIC) algorithm that mitigates the above disadvantages from a point of view of tradeoff between the realization and the performance. Simulation results show that the performance of HSIC is close to the SIC and is superior to the PIC for the WCDMA uplink system under the flat Rayleigh fading channel