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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 17 — Aug. 18, 2008
  • pp: 13450–13455

Evaluation of large girth LDPC codes for PMD compensation by turbo equalization

Lyubomir L. Minkov, Ivan B. Djordjevic, Lei Xu, Ting Wang, and Franko Kueppers  »View Author Affiliations


Optics Express, Vol. 16, Issue 17, pp. 13450-13455 (2008)
http://dx.doi.org/10.1364/OE.16.013450


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Abstract

Large-girth quasi-cyclic LDPC codes have been experimentally evaluated for use in PMD compensation by turbo equalization for a 10 Gb/s NRZ optical transmission system, and observing one sample per bit. Net effective coding gain improvement for girth-10, rate 0.906 code of length 11936 over maximum a posteriori probability (MAP) detector for differential group delay of 125 ps is 6.25 dB at BER of 10-6. Girth-10 LDPC code of rate 0.8 outperforms the girth-10 code of rate 0.906 by 2.75 dB, and provides the net effective coding gain improvement of 9 dB at the same BER. It is experimentally determined that girth-10 LDPC codes of length around 15000 approach channel capacity limit within 1.25 dB.

© 2008 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2300) Fiber optics and optical communications : Fiber measurements

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: June 17, 2008
Revised Manuscript: August 8, 2008
Manuscript Accepted: August 11, 2008
Published: August 15, 2008

Citation
Lyubomir L. Minkov, Ivan B. Djordjevic, Lei Xu, Ting Wang, and Franko Kueppers, "Evaluation of large girth LDPC codes for PMD compensation by turbo equalization," Opt. Express 16, 13450-13455 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-17-13450


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References

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