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The statistics of ldquoequivalentrdquo 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. However, both the mean and variance of the Gaussian...
Key issues related to the design of electro-optic transmitters and receivers are discussed in this paper. These topics include limitations in 100G transmission systems resulting from the frequency response of devices and non-linear effects. Numerical simulations illustrate the importance of realistic modeling in such high-speed systems.
Result of numerical simulations are presented on transmission limits for different modulation formats at 100 Gb/s caused by non-linear effect and chromatic dispersion in standard and non-zero dispersion shifted single mode fibres. Different modulations formats are simulated and their properties compared.
We derive a differential Q factor model for DPSK signals detected by delay line demodulators. The parameters involved in the model are related to signal characteristics such as phase noise linewidth, OSNR and power fluctuations, and can therefore be directly monitored from it. Moreover, its validity is tested and confirmed under various phase noise and amplitude fluctuations scenarios. In addition,...
In this paper, we present experimental results on optical wireless transmission using commercially available phosphorescent white-light LEDs. To the best of our knowledge, we demonstrate for the first time visible-light links operating at transmission rates up to 200 Mb/s over typical room distances and at reasonable bit-error-ratios. The experiments were performed using optical filtering at the receiver...
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