Channel capacity limits for multiple-access channels with slow Rayleigh fading

Abstract

The complex-valued collaborative coding multiple-access (CVCCMA) technique has been shown to offer efficient simultaneous transmission by multiple users over a common radio channel, without the use of orthorgonal codes nor subdivisions in time or frequency . The authors describe the capacity calculation for a T user CVCCMA system in a slow Rayleigh fading environment with additive white Gaussian noise (AWGN). The capacity, in terms of bits per channel use has also been derived by simulation for different values of T with MPSK modulation.