Comparison of differentially coherent and coherent multiuser detection with imperfect phase estimates in a Rayleigh fading channel


Multiuser detectors have superior performance over their single-user counterparts in a multiple-access channel, assuming perfect knowledge of system parameters. In this paper we extend the analysis of multiuser detectors in fading channels by incorporating the effects of imperfect parameter estimates on symbol error probability. This type of analysis should be useful in designing multiuser receivers, showing the error rate sensitivity to channel parameter mismatch.