Optical Front-End for Soft-Decision LDPC Codes in Optical Communication Systems

Author

Sakib, M.N. ; Mahalingam, V. ; Gross, W.J. ; Liboiron-Ladouceur, O.

Author_Institution

Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, QC, Canada

Volume

3

Issue

6

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

533

Lastpage

541

Abstract

A low-complexity soft-decision 12.5 Gb/s optical receiver for decoding low-density parity-check codes reusing conventional hard-decision receivers is investigated. The simulated and experimental results show that the proposed optical receiver exhibits coding gains of 2.75 and 6.73 dB for post-forward-error-correction bit error rates of 10^-4 and 10^-9, respectively, over a hard-decision uncoded system for a 60 km single-mode optical fiber transmission. The soft-decision circuitry consumes approximately 5 W and is optimized to provide two confidence levels, one above and one below the hard-decision levels.

Keywords

error statistics; optical fibre communication; optical receivers; parity check codes; bit rate 12.5 Gbit/s; coding gains; conventional hard-decision receivers; distance 60 km; gain 2.75 dB; gain 6.73 dB; hard-decision levels; hard-decision uncoded system; low-complexity soft-decision optical receiver; low-density parity-check codes; optical communication systems; optical front-end; post-forward-error-correction bit error rates; single-mode optical fiber transmission; soft-decision LDPC codes; soft-decision circuitry; Adaptive optics; High speed optical techniques; Optical attenuators; Optical noise; Optical polarization; Optical receivers; Parity check codes; Digital signal processing; Error correction coding; Low-density parity-check codes; Optical fiber communications;

fLanguage

English

Journal_Title

Optical Communications and Networking, IEEE/OSA Journal of

Publisher

ieee

ISSN

1943-0620

Type

jour

DOI

10.1364/JOCN.3.000533

Filename

5783020