LDPC-Coded OFDM for Optical Communication Systems with Direct Detection
Djordjevic, I.B.
Vasic, B.
Neifeld, M.A.
Univ. of Arizona, Tucson;
This paper appears in: Selected Topics in Quantum Electronics, IEEE Journal of
Publication Date: Sept.-oct. 2007
Volume: 13,
Issue: 5, Part 2
On page(s): 1446-1454
Location: Haifa, Israel,
ISSN: 1077-260X
INSPEC Accession Number: 9630324
Digital Object Identifier: 10.1109/JSTQE.2007.901893
Current Version Published: 2007-10-15
Abstract
Low-density parity-check (LDPC) coded orthogonal frequency division multiplexing (OFDM) is proposed as an efficient coded modulation technique suitable for optical communication systems. We show that in long-haul fiber optics communications, LDPC-coded OFDM increases spectral efficiency, and reduces the influence of residual chromatic dispersion and the influence of fiber nonlinearities. LDPC-coded OFDM is as also a promising polarization-mode dispersion (PMD) compensation technique. In free space optical communications, LDPC-coded OFDM improves the immunity to the atmospheric turbulence; while in multimode fiber links, it reduces the influence of intermodal dispersion. In plastic optical fiber links it reduces the influence of dispersion and helps to overcome the bandwidth limitations. Several power efficient OFDM schemes and LDPC codes suitable for use in LDPC-coded OFDM optical communication systems are introduced.
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