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Proceedings Article

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

[+] Author Affiliations
Ivan B. Djordjevic

The Univ. of Arizona (USA)

Lei Xu, Ting Wang

NEC Labs. America, Inc. (USA)

Proc. SPIE 7988, Optical Transmission Systems, Switching, and Subsystems VIII, 79881G (February 18, 2011); doi:10.1117/12.888344
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From Conference Volume 7988

  • Optical Transmission Systems, Switching, and Subsystems VIII
  • Yikai Su; Ernesto Ciaramella; Xiang Liu; Naoya Wada
  • Shanghai, China | December 08, 2010

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.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Ivan B. Djordjevic ; Lei Xu and Ting Wang
"On the reduced-complexity of LDPC decoders for beyond 400 Gb/s serial optical transmission", Proc. SPIE 7988, Optical Transmission Systems, Switching, and Subsystems VIII, 79881G (February 18, 2011); doi:10.1117/12.888344; http://dx.doi.org/10.1117/12.888344


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