Abstract
In this paper, performance of an optical CDMA system with turbo code is analyzed and simulated. It is assumed that optical channel is an intensity modulated (IM) channel and direct-detection scheme is employed to detect the received optical signal. The modulation scheme used is binary-pulse-position-modulation (BPPM). From the simulation results, it is shown that turbo coding offers considerable coding gain with reasonable encoding/decoding complexity. Also, it is demonstrated that the performance of an optical CDMA system can be substantially improved by increasing the interleaver length for a fixed code rate. The results in this paper can be applied to an optical CDMA system with PPM modulation.
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