Abstract

An original model is established and used to predict the spectral properties of optical fiber pulse position modulation (PPM). A suitable random variable is built into the model to represent the stochastic data sequence encoded. The spectral prediction is then used to examine the problem of slot synchronization under two conditions, first when the channel dispersion is negligible, then when Gaussian type pulses are received. The model is shown to be capable of catering for the different PPM parameters and is used to optimize slot synchronization using these parameters under each of the two conditions. Practical results measured on a PPM system are given and shown to agree with the theoretical predictions, concluding with those conditions that optimize slot synchronization.

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