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Comparison of Linear and Nonlinear Equalization for Ultra-High Capacity Spectral Superchannels

Vgenopoulou, V; Erkilinc, MS; Bouziane, R; Tolmachev, A; Nazarathy, M; Killey, R; Tomkos, I; (2016) Comparison of Linear and Nonlinear Equalization for Ultra-High Capacity Spectral Superchannels. In: Proceedings of the 2016 18th International Conference on Transparent Optical Networks (ICTON). IEEE: Trento, Italy. Green open access

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Abstract

In ultra-high-speed (>400Gb/s per wavelength), high-spectral efficiency coherent optical communication systems using multi-carrier spectral superchannels, the maximum reach is severely limited due to linear and, foremost, nonlinear impairments. Hence, the implementation of advanced digital signal processing (DSP) techniques in optical transceivers is crucial for alleviating the impact of such impairments. However, the DSP performance improvement comes at the expense of increased cost and power consumption. Given that the computational complexity of the applied linear and nonlinear equalizers is the factor that determines the trade-off between the performance improvement and cost, in this study we provide an extended analysis on the computational complexity of various linear and nonlinear equalization approaches. First, we draw a complexity comparison between a conventional OFDM coherent receiver versus a filter-bank based OFDM receiver and it is shown that the latter provides significant complexity savings. Second, we present a comparison between the digital back-propagation split-step Fourier (DBP-SSF) method and the inverse Volterra series transfer function nonlinear equalizer (IVSTF-NLE) in terms of performance and computational complexity for a 32 Gbaud polarization multiplexed (PM)-16 quadrature amplitude modulation (QAM) OFDM superchannel.

Type: Proceedings paper
Title: Comparison of Linear and Nonlinear Equalization for Ultra-High Capacity Spectral Superchannels
Event: 18th International Conference on Transparent Optical Networks (ICTON)
Location: Univ Trento, Fac Letters & Philosophy, Trento, ITALY
Dates: 10 July 2016 - 14 July 2016
ISBN-13: 978-1-5090-1467-5
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/ICTON.2016.7550438
Publisher version: https://doi.org/10.1109/ICTON.2016.7550438
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: power consumption, multi-band OFDM superchannels, filter-bank modulation, nonlinear compensation, computational complexity
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/1532859
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