Performance analysis of linear multiuser receivers for CDMA in fading channels with base station diversity

Bit error probability (BEP) analysis for linear multiuser receivers with multiple sensors in frequency-selective Rayleigh fading channels is presented. The analysis is applied to evaluate the BEP in a cellular CDMA system. Diversity and multiuser receivers are compared based on the examples. It is observed that the macroscopic diversity improves the performance of receivers significantly in cellular CDMA networks. When comparing diversity and multiuser receivers it is concluded that multiuser receivers are necessary to provide low bit error probabilities. The results also show that the reduction of intercell MAI yields a significant performance advantage in cellular networks. It is also demonstrated that the combination of spatial diversity and a multiuser receiver provides a significant receiver performance or system capacity gain in comparison to implementing only one of them