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Future Internet 2018, 10(12), 118; https://doi.org/10.3390/fi10120118

DSP-Based 40 GB/s Lane Rate Next-Generation Access Networks

1
Is with Huawei Technologies Duesseldorf GmbH, European Research Center, Riesstrasse 25, 80992 München, Germany
2
Was with ADVA Optical Networking SE, Märzenquelle 1-3, 98617 Meiningen, Germany
3
Department of Electronic Engineering, College of Information Science and Technology, Jinan University, Guangzhou 510632, China
4
School of Electronic Engineering, Radio and Optical Laboratory, Dublin City University, Glasnevin 9, Dublin, Ireland
5
Department Electrical and Electronic Engineering, University College London, London WC1E 6BT, UK
6
School of Electronic Engineering, Bangor University, Dean Street, Bangor, Gwynedd LL57 1UT, UK
This paper is an extended version of “40 Gb/s Lane Rate NG-PON using Electrical/Optical Duobinary, PAM-4 and Low Complex Equalizations” published in the Proceedings of the Optical Fiber Communication Conference, Anaheim, CA, USA, 20–22 March 2016.
*
Author to whom correspondence should be addressed.
Received: 24 September 2018 / Revised: 24 November 2018 / Accepted: 28 November 2018 / Published: 30 November 2018
(This article belongs to the Special Issue Recent Advances in DSP-Based Optical Communications)
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Abstract

To address the continuous growth in high-speed ubiquitous access required by residential users and enterprises, Telecommunication operators must upgrade their networks to higher data rates. For optical fiber access networks that directly connect end users to metro/regional network, capacity upgrade must be done in a cost- and energy-efficient manner. 40 Gb/s is the possible lane rate for the next generation passive optical networks (NG-PONs). Ideally, existing 10 G PON components could be reused to support 40 Gb/s lane-rate NG-PON transceiver, which requires efficient modulation format and digital signal processing (DSP) to alleviate the bandwidth limitation and fiber dispersion. The major contribution of this work is to offer insight performance comparisons of 40 Gb/s lane rate electrical three level Duobinary, optical Duobinary, and four-level pulse amplitude modulation (PAM-4) for incorporating low complex DSPs, including linear and nonlinear Volterra equalization, as well as maximum likelihood sequence estimation. Detailed analysis and comparison of the complexity of various DSP algorithms are performed. Transceiver bandwidth optimization is also undertaken. The results show that the choices of proper modulation format and DSP configuration depend on the transmission distances of interest. View Full-Text
Keywords: fiber optics communications; next generation passive optical network; nonlinear equalization; maximum likelihood sequence estimation; link power budget fiber optics communications; next generation passive optical network; nonlinear equalization; maximum likelihood sequence estimation; link power budget
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Wei, J.; Zhou, J.; Giacoumidis, E.; Haigh, P.A.; Tang, J. DSP-Based 40 GB/s Lane Rate Next-Generation Access Networks. Future Internet 2018, 10, 118.

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