Performance Analysis of an Atmospheric Optical M-PPM CDMA System with Optical Orthogonal Code and Partial Modified Prime Code
نویسندگان
چکیده
In this research a theoretical analysis is provided to evaluate the performance of an optical M-ary Pulse Position Modulation (M-PPM) taking into account the effects of Scintillation, avalanche photodiode noise, thermal noise and multi-user interference. The expression for the signal current at the output of an optical direct detection receiver with sequence inverse keying operation considering the effect of scintillations is derived. The effect of atmospheric scintillation on the Bit error rate (BER) performance is determined in the forms of power penalty and the results are compared for OOC’s and PMP codes and optimum system parameters are determined.
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