Low-Rate Channel Coding Scheme for Replica MT-CDMA Communication System

In this paper, we analyze performance of a special kind of multitone CDMA (MT-CDMA) systems that is Replica MT-CDMA. It is shown that with the same bandwidth, Replica MT-CDMA system outperforms the conventional system that we name it as S/P MT-CDMA. We also propose a low-rate bandwidth efficient channel coding scheme for Replica MT-CDMA communication system so that by using it, coded Replica MT-CDMA system needs to the same bandwidth as the uncoded one. In this paper, we compare low-rate coded and uncoded Replica MT-CDMA systems with S/P MT-CDMA system over uplink and downlink Rayleigh fading channels. Our results show that with the same bandwidth, performance of coded Replica MT-CDMA system with the proposed channel coding scheme is considerably better than performance of both uncoded MT-CDMA systems.