On the reduced-complexity of LDPC decoders for beyond 400 Gb/s serial optical transmission

Ivan B. Djordjevic, Lei Xu, Ting Wang

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

Abstract

Two reduced-complexity (RC) LDPC decoders are proposed, which can be used in combination with large-girth LDPC codes to enable beyond 400 Gb/s serial optical transmission. We show that optimally attenuated RC min-sum sum algorithm performs only 0.45 dB worse than conventional sum-product algorithm, while having lower storage memory requirements and much lower latency. We further evaluate the proposed algorithms for use in beyond 400 Gb/s serial optical transmission in combination with PolMUX 32-IPQ-based signal constellation and show that low BERs can be achieved for medium optical SNRs, while achieving the net coding gain above 11.4 dB.

Original languageEnglish (US)
Title of host publicationOptical Transmission Systems, Switching, and Subsystems VIII
DOIs
StatePublished - Mar 28 2011
EventOptical Transmission Systems, Switching, and Subsystems VIII - Shanghai, China
Duration: Dec 8 2010Dec 12 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7988
ISSN (Print)0277-786X

Other

OtherOptical Transmission Systems, Switching, and Subsystems VIII
CountryChina
CityShanghai
Period12/8/1012/12/10

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Keywords

  • Coherent detection
  • Forward error correction (FEC)
  • Low-density parity-check (LDPC) codes
  • Optical communications
  • Reduced complexity (RC) LDPC decoders

ASJC Scopus subject areas

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

Cite this

Djordjevic, I. B., Xu, L., & Wang, T. (2011). On the reduced-complexity of LDPC decoders for beyond 400 Gb/s serial optical transmission. In Optical Transmission Systems, Switching, and Subsystems VIII [79881G] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7988). https://doi.org/10.1117/12.888344