Impact of inter-symbol interference on optical DQPSK systems performance evaluation using equivalent differential phase


The statistics of “equivalent” differential phase (EDP) of differential quadrature phase-shift keying (DQPSK) systems is assessed numerically. It is shown that the EDP statistics is approximately Gaussian for a large range of system parameters. Thus, performance evaluation methods based on a Gaussian approximation for the EDP may be used… (More)


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