Impact of 4D Channel Distribution on the Achievable Rates in Coherent Optical Communication Experiments
Journal article, 2016

We experimentally investigate mutual information and generalized mutual information for coherent optical transmission systems. The impact of the assumed channel distribution on the achievable rate is investigated for distributions in up to four dimensions. Single channel and wavelength division multiplexing (WDM) transmission over transmission links with and without inline dispersion compensation are studied. We show that for conventional WDM systems without inline dispersion compensation, a circularly symmetric complex Gaussian distribution is a good approximation of the channel. For other channels, such as with inline dispersion compensation, this is no longer true and gains in the achievable information rate are obtained by considering more sophisticated four-dimensional (4D) distributions. We also show that for nonlinear channels, gains in the achievable information rate can also be achieved by estimating the mean values of the received constellation in four dimensions. The highest gain for such channels is seen for a 4D correlated Gaussian distribution.

DISPERSION

Digital communication

Channel models

TRANSMISSION

SPECTRAL EFFICIENCY

Optical fiber communication

CAPACITY

INTERLEAVED CODED MODULATION

SYSTEMS

Mutual Information

INFORMATION RATES

Fiber nonlinear optics

NETWORKS

DISTANCE

FIBER

Author

Tobias Eriksson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Tobias Fehenberger

Technical University of Munich

Peter Andrekson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Magnus Karlsson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Norbert Hanik

Technical University of Munich

Erik Agrell

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

Journal of Lightwave Technology

0733-8724 (ISSN)

Vol. 34 9 2256-2266 7404211

Areas of Advance

Information and Communication Technology

Subject Categories

Telecommunications

Communication Systems

DOI

10.1109/JLT.2016.2528550

More information

Latest update

3/29/2018