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Sensitivity Gains by Mismatched Probabilistic Shaping for Optical Communication Systems

Fehenberger, T; Lavery, D; Maher, R; Alvarado, A; Bayvel, P; Hanik, N; (2016) Sensitivity Gains by Mismatched Probabilistic Shaping for Optical Communication Systems. IEEE Photonics Technology Letters , 28 (7) pp. 786-789. 10.1109/LPT.2015.2514078. Green open access

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Abstract

Probabilistic shaping of quadrature amplitude modulation (QAM) is used to enhance the sensitivity of an optical communication system. Sensitivity gains of 0.43 and 0.8 dB are demonstrated in back-to-back experiments by the shaping of 16QAM and 64QAM, respectively. Furthermore, numerical simulations are used to prove the robustness of probabilistic shaping to a mismatch between the constellation used and the signal-to-noise ratio (SNR) of the channel. It is found that, accepting a 0.1-dB SNR penalty, only four shaping distributions are required to support these gains for 64QAM.

Type: Article
Title: Sensitivity Gains by Mismatched Probabilistic Shaping for Optical Communication Systems
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/LPT.2015.2514078
Publisher version: http://dx.doi.org/10.1109/LPT.2015.2514078
Language: English
Additional information: Copyright © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Keywords: Achievable information rates, digital coherent transceivers, digital signal processing, mutual information, probabilistic shaping, signal shaping
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1503900
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