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Performance of a multicarrier ds/cdma system with successive interference cancellation

In this paper, successive interference cancellation (SIC) scheme is proposed for a multicarrier DS/CDMA system and its performance is analyzed in a Rayleigh fading channel. The SIC scheme is employed to mitigate performance degradation due to multiple access interference (MAI) coupled with near-far problem. Bit error probability of the proposed system is derived for maximal-ratio and equal-gain combining schemes of subcarrier signals, respectively. From numerical results, it is shown that the proposed system achieves significant performance improvement over a conventional multicarrier DS/CDMA system. The proposed system can find application in multicarrier DS/CDMA systems for high-rate data services.