Constellation Shaping in Optical Communication Systems
Licentiate thesis, 2021
To study GS, instead of considering machine learning approaches or optimization of irregular constellations in two dimensions, we have explored multidimensional lattice-based constellations. These constellations provide a regular structure with a fast and low-complexity encoding and decoding. In simulations, we show the possibility of transmitting and detecting constellation with a size of more than 10^{28} points which can be done without a look-up table to store the constellation points. Moreover, improved performance in terms of bit error rate, symbol error rate, and transmission reach are demonstrated over the linear additive white Gaussian noise as well as the nonlinear fiber channel compared to QAM formats.
Furthermore, we investigate the performance of PS in two separate scenarios, i.e., transmitter impairments and transmission over hybrid systems with on-off keying channels. In both cases, we find that while PS-QAM outperforms the uniform QAM in the linear regime, uniform QAM can achieve better performance at the optimum power in the presence of transmitter or channel nonlinearities.
coherent receiver
constellation shaping
multidimensional modulation format
optical communications
probabilistic shaping
geometric shaping
Author
Ali Mirani
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
Low-complexity geometric shaping
Journal of Lightwave Technology,;Vol. 39(2021)p. 363-371
Journal article
Lattice-based geometric shaping
European Conference on Optical Communication, ECOC,;(2020)
Paper in proceeding
Comparison of uniform cross QAM and probabilistically shaped QAM formats under the impact of transmitter impairments
Proceedings of 45th European Conference on Optical Communication,;(2019)
Paper in proceeding
Performance of Probabilistic Shaping Coherent Channels in Hybrid Systems
International Conference on Transparent Optical Networks,;Vol. 2020-July(2020)p. 1-3
Paper in proceeding
Signal shaping in optical communications—Beyond the Gaussian channel
Swedish Research Council (VR) (2017-03702), 2018-01-01 -- 2021-12-31.
Polarization-aware fiber optic transmisson
Swedish Research Council (VR) (2015-04239), 2016-01-01 -- 2019-12-31.
Coupled fiber optic channels
Swedish Research Council (VR) (2019-04078), 2019-12-01 -- 2023-11-30.
Areas of Advance
Information and Communication Technology
Nanoscience and Nanotechnology
Driving Forces
Sustainable development
Innovation and entrepreneurship
Subject Categories
Telecommunications
Communication Systems
Signal Processing
Roots
Basic sciences
Infrastructure
C3SE (Chalmers Centre for Computational Science and Engineering)
Technical report MC2 - Department of Microtechnology and Nanoscience, Chalmers University of Technology: 439
Publisher
Chalmers
Kollektorn, Canyon, Kemivägen 9, department of Microtechnology and Nanoscience (MC2), Chalmers.
Opponent: Tobias A. Eriksson at Infinera, Stockholm.