Iterative multiuser detection of CDMA in fading channels

A new multiuser detection technique is proposed which is based on Gaussian approximation. The system uses conventional reverse link CDMA transmitter and a proposed receiver. In the receiver, the interference rejection block, known as Signal Reliability Estimator (SRE) and the decoder (DEC), exchange extrinsic information in an iterative manner. The system is analyzed in Rayleigh fading channels. It is observed from simulation results that Bit Error Rate (BER) of the system is almost independent of the number of users.