Interference Mitigation Using Successive Interference Cancellation in Optical CDMA Systems

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Executive Summary

Performance of Optical Code Division Multiple Access (O-CDMA) system is influenced by Multiple Access Interference (MAI) resulted from the overlapping between the users. To overcome this problem, Successive Interference Cancellation (SIC) scheme is applied to O-CDMA systems. In this paper, the authors apply successive interference cancellation technique to a Spectral Amplitude Coding (SAC) system that uses Modified Quadratic Congruence (MQC) codes as signature sequence codes. The system is analyzed for two cases: same effective power for all the users and different effective power from each user. It is shown that under ideal effective power the SIC/SAC optical CDMA systems have potential to suppress the intensity noise and mitigate multiple access interference.

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