Open AccessFiber communications using convolutional coding and bandwidth-efficient modulation
Author(s) -
T. Wuth,
Erik Agrell,
Magnus Karlsson,
Maria Sköld
Publication year - 2006
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.14.000542
Subject(s) - computer science , optics , intersymbol interference , decoding methods , convolutional code , spectral efficiency , bandwidth (computing) , electronic engineering , telecommunications , physics , channel (broadcasting) , engineering
In this paper we evaluate numerically the advantage of combining convolutional coding and bandwidth-efficient modulation. We compare different multilevel modulation formats, line codes, and hard/soft decision decoding. Compared with DPSK modulation (with the same bandwidth and information transmission rate), an improvement of almost 5 dB is observed for bit error rates around 10-8. We also study the robustness to intersymbol interference in the form of chromatic dispersion, and find that the improvement of the coded transmission lines improves over the uncoded even in presence of chromatic dispersion.