Adaptive Coded Modulation for Nonlinear Fiber-Optical Channels
Paper in proceedings, 2012

A low complexity hybrid polar low-density parity check (LDPC) coded modulation (CM) scheme is introduced for a single-wavelength fiber-optical channel. In the proposed scheme, we exploit a low complexity probabilistic shaping together with a four-dimensional (4D) mapping to reduce the complexity of a 4D non-binary LDPC CM scheme for fiber-optic channels. The proposed scheme has a flexible structure and it can be used as an adaptive-rate CM scheme. The numerical results show that the forward error correction (FEC) threshold of the introduced CM scheme can be significantly improved by probabilistic shaping with a negligible increase in the system complexity. In particular, the FEC threshold for the uncoded symbol error rate of the introduced CM scheme with 4D 16-ary quadrature amplitude modulation can be improved from 0.058 to 0.072 by exploiting a shaping overhead (redundancy) of 0.016 for an information bit error rate of 10^{-5}.

probabilistic shaping

Coded modulation

Chromatic dispersion

polar code

and FEC threshold

fiber-optic channel

nonlinear Kerr-effect

adaptive coded modulation

low density parity check code (LDPC)

Author

Lotfollah Beygi

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

Erik Agrell

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

Magnus Karlsson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

2012 IEEE Globecom Workshops, Anaheim, USA, 3-7 December 2012

331-335 6477592

Areas of Advance

Information and Communication Technology

Subject Categories

Communication Systems

DOI

10.1109/GLOCOMW.2012.6477592

ISBN

978-1-4673-4942-0

More information

Latest update

3/29/2018