Performance Evaluation of MC-CDMA System Over Rayleigh Fading Channel

Abstract

Multi Carrier Code Division Multiple Access (MC-CDMA) is a well known technique for high speed wireless data transmission .Two advanced technology was included in the MC-CDMA structure, such as orthogonal frequency division multiplex (OFDM) and the code division multiple access (CDMA),so that it benefits from the robustness of OFDM against multipath environment and from the capability of multiuser multiplexing services that is achieved via (CDMA) system. MC-CDMA is a multicarrier spread spectrum system which is classified as the candidate scheme for future mobile radio systems. In this paper MC-CDMA system, with Rayleigh fading channel and 16QAM array modulation, was simulated to investigate the effects of different parameters on the system performance, such as processing gain; number of paths; number of users; interleaving; and coding ratio.MC-CDMA performances can be considerably improved by proper selection of these parameters. As expected, results show that MC-CDMA has a better performance over CDMA system. KEYWORDS CDMA, OFDM, MC-CDMA, Rayleigh fading, Convolutional Encoder.