Optimized signal constellations for ultra-high-speed optical transport

Shaoliang Zhang, Tao Liu, Yequn Zhang, Fatih Yaman, Ivan B. Djordjevic, Ting Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


The joint optimization of coding and modulation formats would provide significant receiver sensitivity improvement due to the increased Hamming distance of codes. By applying Arimoto-Blahut algorithm to maximize mutual information, optimized coded-modulation has been found out together with optimized bit-mapping rule. Simulated channel capacity shows that optimized coded modulation could outperform its counterparts, such as regular qaudrature-amplitude modulation, by around 0.3dB up to about 0.9 coding rate. The improvement is found to be larger in higher modulation formats. Optimal coded-8QAM modulation has been further verified in experiment, where 40Tb/s over 6787km is demonstrated by transmitting 200G per wavelength thanks to the better receiver sensitivity of optimal coded modulation.

Original languageEnglish (US)
Title of host publicationOptical Metro Networks and Short-Haul Systems VII
EditorsAtul K. Srivastava, Benjamin B. Dingel, Achyut K. Dutta
ISBN (Electronic)9781628414783
StatePublished - 2015
EventOptical Metro Networks and Short-Haul Systems VII - San Francisco, United States
Duration: Feb 10 2015Feb 12 2015

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherOptical Metro Networks and Short-Haul Systems VII
Country/TerritoryUnited States
CitySan Francisco


  • Coded-modulation
  • Optimized Constellation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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