Non-binary LDPC-coded modulation for high-speed optical metro networks with backpropagation

Murat Arabaci, Ivan B. Djordjevic, Ross Saunders, Roberto M. Marcoccia

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

8 Scopus citations


To simultaneously mitigate the linear and nonlinear channel impairments in high-speed optical communications, we propose the use of non-binary low-density-parity-check-coded modulation in combination with a coarse backpropagation method. By employing backpropagation, we reduce the memory in the channel and in return obtain significant reductions in the complexity of the channel equalizer which is exponentially proportional to the channel memory. We then compensate for the remaining channel distortions using forward error correction based on non-binary LDPC codes. We propose non-binary-LDPC-coded modulation scheme because, compared to bit-interleaved binary-LDPC-coded modulation scheme employing turbo equalization, the proposed scheme lowers the computational complexity and latency of the overall system while providing impressively larger coding gains.

Original languageEnglish (US)
Title of host publicationOptical Metro Networks and Short-Haul Systems II
StatePublished - 2010
EventOptical Metro Networks and Short-Haul Systems II - San Francisco, CA, United States
Duration: Jan 27 2010Jan 28 2010

Publication series

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


OtherOptical Metro Networks and Short-Haul Systems II
Country/TerritoryUnited States
CitySan Francisco, CA


  • Backpropagation
  • Coding theory
  • Forward error correction (FEC)
  • LDPC codes
  • Non-binary codes
  • Optical communications
  • Optical metro networks

ASJC Scopus subject areas

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


Dive into the research topics of 'Non-binary LDPC-coded modulation for high-speed optical metro networks with backpropagation'. Together they form a unique fingerprint.

Cite this