Constellation Shaping for WDM Systems Using 256QAM/1024QAM With Probabilistic Optimization

  title={Constellation Shaping for WDM Systems Using 256QAM/1024QAM With Probabilistic Optimization},
  author={Metodi Yankov and Francesco Da Ros and Edson P. da Silva and S\oren Forchhammer and Knud J. Larsen and Leif Katsuo Oxenl\owe and Michael Galili and Darko Zibar},
  journal={Journal of Lightwave Technology},
In this paper, probabilistic shaping is numerically and experimentally investigated for increasing the transmission reach of wavelength division multiplexed (WDM) optical communication systems employing quadrature amplitude modulation (QAM). An optimized probability mass function (PMF) of the QAM symbols is first found from a modified Blahut-Arimoto algorithm for the optical channel. A turbo coded bit interleaved coded modulation system is then applied, which relies on many-to-one labeling to… CONTINUE READING
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