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Pulse Position Modulation (PPM) is a power efficient scheme that is used with IM/DD. In this paper, performance of an optical Code Division Multiple Access (CDMA) system with Turbo coding is analyzed and simulated. Turbo coding is applied on an optical channel with PPM and direct detection of the received optical signal then the performance is evaluated. From the simulation results, it is demonstrated that performance of the optical CDMA system can be improved by increasing the interleaver length and the number of iterations in the decoding process for a fixed code rate.
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