Title :
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
fDate :
6/1/2011 12:00:00 AM
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;
Journal_Title :
Optical Communications and Networking, IEEE/OSA Journal of
DOI :
10.1364/JOCN.3.000533
