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

Lyubomir L. Minkov, Ivan B Djordjevic, Lei Xu, Ting Wang, Franko Kueppers

Research output: Contribution to journalArticle

9 Citations (Scopus)

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.

Original languageEnglish (US)
Pages (from-to)13450-13455
Number of pages6
JournalOptics Express
Volume16
Issue number17
DOIs
StatePublished - Aug 18 2008

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evaluation
coding
channel capacity
detectors

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Evaluation of large girth LDPC codes for PMD compensation by turbo equalization. / Minkov, Lyubomir L.; Djordjevic, Ivan B; Xu, Lei; Wang, Ting; Kueppers, Franko.

In: Optics Express, Vol. 16, No. 17, 18.08.2008, p. 13450-13455.

Research output: Contribution to journalArticle

Minkov, Lyubomir L. ; Djordjevic, Ivan B ; Xu, Lei ; Wang, Ting ; Kueppers, Franko. / Evaluation of large girth LDPC codes for PMD compensation by turbo equalization. In: Optics Express. 2008 ; Vol. 16, No. 17. pp. 13450-13455.
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