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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 22 — Oct. 25, 2010
  • pp: 23371–23377

On the reduced-complexity of LDPC decoders for ultra-high-speed optical transmission

Ivan B. Djordjevic, Lei Xu, and Ting Wang  »View Author Affiliations


Optics Express, Vol. 18, Issue 22, pp. 23371-23377 (2010)
http://dx.doi.org/10.1364/OE.18.023371


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Abstract

We propose two reduced-complexity (RC) LDPC decoders, which can be used in combination with large-girth LDPC codes to enable ultra-high-speed serial optical transmission. We show that optimally attenuated RC min-sum sum algorithm performs only 0.46 dB (at BER of 10−9) worse than conventional sum-product algorithm, while having lower storage memory requirements and much lower latency. We further study the use of RC LDPC decoding algorithms in multilevel coded modulation with coherent detection and show that with RC decoding algorithms we can achieve the net coding gain larger than 11 dB at BERs below 10−9.

© 2010 OSA

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.1660) Fiber optics and optical communications : Coherent communications
(060.4080) Fiber optics and optical communications : Modulation

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: September 29, 2010
Manuscript Accepted: October 12, 2010
Published: October 20, 2010

Citation
Ivan B. Djordjevic, Lei Xu, and Ting Wang, "On the reduced-complexity of LDPC decoders for ultra-high-speed optical transmission," Opt. Express 18, 23371-23377 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-22-23371


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References

  1. R. Saunders, M. Traverso, T. Schmidt, and C. Malouin, “Economics of 100Gb/s transport,” in Proc. OFC/NFOEC 2010, Paper No. NMB2, San Diego, CA, March 21–25, 2010.
  2. I. B. Djordjevic, W. Ryan, and B. Vasic, Coding for Optical Channels (Springer, 2010).
  3. I. B. Djordjevic, and H. G. Batshon, Lei Xu and T. Wang, “Coded polarization-multiplexed iterative polar modulation (PM-IPM) for beyond 400 Gb/s serial optical transmission,” in Proc. OFC/NFOEC 2010, Paper No. OMK2, San Diego, CA, March 21–25, 2010.
  4. J. Chen, A. Dholakia, E. Eleftheriou, M. Fossorier, and X.-Y. Hu, “Reduced-complexity decoding of LDPC codes,” IEEE Trans. Commun. 53(8), 1288–1299 (2005). [CrossRef]
  5. M. P. C. Fossorier, M. Mihaljevic, and H. Imai, “Reduced-complexity iterative decoding of low-density parity-check codes based on belief propagation,” IEEE Trans. Commun. 47(5), 673–680 (1999). [CrossRef]

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