Adaptive blind MOE/PIC multiuser detector for multicarrier DS-CDMA systems

Abstract

Frequency selective fading occurs in mobile communication systems due to the Doppler effect. System performance is rapidly reduced due to the effect of multiuser interference under frequency selective channels in DS-CDMA systems. To overcome these problems, we adopted multi-carrier modulation techniques. The frequency selective channel effects can be solved by means of these modulation techniques, and interference problems due to multiuser access are solved by means of multiuser detection techniques. We propose a blind MOE/PIC multiuser detection method which is composed of a blind multiuser detection technique and a parallel interference canceller. Simulation results show that the proposed method performs better than conventional methods.