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Constellation shaping for high symbol rate SNR limited transceivers
Author(s): Robert Maher; Mehdi Torbatian; Swen Koenig; Omer Khayam; Alban Le Liepvre; Parmijit Samra; Pat Day; Mark Missey; Zhenxing Wang; An Nguyen; Ryan Going; Stefan Wolf; Samantha Nowierski; Xiaojun Xie; Stephanie Tremblay; Mehrdad Ziari; Fred Kish; Jeff Rahn; Parthiban Kandappan
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Paper Abstract

The information rate (IR) of a digital coherent transceiver is constrained by the inherent practical signal-to-noise ratio (SNR) limit. Coded modulation, which is the combination of multi-level modulation and forward error correction, aims to maximize the IR within this SNR envelope. While probabilistic constellation shaping has enhanced this methodology by providing an increase in IR over conventionally employed square quadrature amplitude modulation (QAM) formats, it is the ability to eloquently tune the per wavelength IR by varying the symbol probabilities that has gained this scheme significant traction within optical communications in recent years. As commercial line cards continue their evolution towards 100 GBd and to modulation formats beyond 64QAM, we discuss the merits of probabilistic shaping for high symbol rate digital coherent transceivers in the presence of a practical SNR limit.

Paper Details

Date Published: 1 February 2019
PDF: 7 pages
Proc. SPIE 10947, Next-Generation Optical Communication: Components, Sub-Systems, and Systems VIII, 1094708 (1 February 2019); doi: 10.1117/12.2509151
Show Author Affiliations
Robert Maher, Infinera Corp. (United States)
Mehdi Torbatian, Infinera Corp. (Canada)
Swen Koenig, Infinera Corp. (United States)
Omer Khayam, Infinera Corp. (United States)
Alban Le Liepvre, Infinera Corp. (United States)
Parmijit Samra, Infinera Corp. (United States)
Pat Day, Infinera Corp. (United States)
Mark Missey, Infinera Corp. (United States)
Zhenxing Wang, Infinera Corp. (United States)
An Nguyen, Infinera Corp. (United States)
Ryan Going, Infinera Corp. (United States)
Stefan Wolf, Infinera Corp. (United States)
Samantha Nowierski, Infinera Corp. (United States)
Xiaojun Xie, Infinera Corp. (United States)
Stephanie Tremblay, Infinera Corp. (Canada)
Mehrdad Ziari, Infinera Corp. (United States)
Fred Kish, Infinera Corp. (United States)
Jeff Rahn, Infinera Corp. (United States)
Parthiban Kandappan, Infinera Corp. (United States)

Published in SPIE Proceedings Vol. 10947:
Next-Generation Optical Communication: Components, Sub-Systems, and Systems VIII
Guifang Li; Xiang Zhou, Editor(s)

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