Rate-Adaptive Coded Modulation for Fiber-Optic Communications
Artikel i vetenskaplig tidskrift, 2014

Rate-adaptive optical transceivers can play an important role in exploiting the available resources in dynamic optical networks, in which different links yield different signal qualities. We study rate-adaptive joint coding and modulation, often called coded modulation (CM), addressing non-dispersion-managed (non-DM) links, exploiting recent advances in channel modeling of these links. We introduce a four-dimensional CM scheme, which shows a better tradeoff between digital signal processing complexity and transparent reach than existing methods. We construct a rate-adaptive CM scheme combining a single low-density parity-check code with a family of three signal constellations and using probabilistic signal shaping. We evaluate the performance of the proposed CM scheme for single-channel transmission through long-haul non-DM fiber-optic systems with electronic chromatic-dispersion compensation. The numerical results demonstrate improvement of spectral efficiency over a wide range of transparent reaches, an improvement over 1 dB compared to existing methods.


Lotfollah Beygi

Chalmers, Signaler och system, Kommunikation, Antenner och Optiska Nätverk

Erik Agrell

Chalmers, Signaler och system, Kommunikation, Antenner och Optiska Nätverk

J. M. Kahn

Stanford University

Magnus Karlsson

Chalmers, Mikroteknologi och nanovetenskap, Fotonik

Journal of Lightwave Technology

0733-8724 (ISSN)

Vol. 32 2 333-343 6634233


Informations- och kommunikationsteknik




Elektroteknik och elektronik



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