Improved carrier phase recovery for high-capacity optical communication systems with high-order modulation formats

Yunfan Zhang; Tiegen Liu; Cenqin Jin; Tongyang Xu; Mingming Tan; Jian Zhao; Tianhua Xu

doi:10.1016/j.optcom.2024.130326

Improved carrier phase recovery for high-capacity optical communication systems with high-order modulation formats

Yunfan Zhang, Tiegen Liu, Cenqin Jin, Tongyang Xu, Mingming Tan, Jian Zhao^*, Tianhua Xu^*

^*Corresponding author for this work

School of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
University of Warwick,School of Engineering,Coventry,United Kingdom,CV4 7AL
School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom
Department of Electronic and Electrical Engineering, University College London, London WC1E 6BT, United Kingdom

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Abstract

A modified Viterbi-Viterbi (MVV) carrier phase recovery (CPR) algorithm is comprehensively studied based on the quadrature phase-shift-keying (QPSK) partition scheme. By improving the QPSK partition scheme for the 16-ary quadrature amplitude modulation (16QAM), MVV algorithm is developed for the optical fiber communication systems with the modulation formats of dual-polarization 64-QAM (DP-64QAM) and DP-256QAM. Numerical simulations have been carried out in a 9-channel Nyquist-spaced 32-Gbaud optical transmission system for different modulation formats and the performance of MVV CPR with respect to pilot-aided (PA) CPR has been examined. Results show that MVV CPR can significantly mitigate the laser phase noise in the system using high-order modulation formats. Compared to PA CPR, MVV CPR performs better with the increase of the transmission distance, where the impact of equalization enhanced phase noise has to be taken into account. Furthermore, MVV has been compared with other CPR approaches in terms of the performance and the computational complexity.

Original language	English
Article number	130326
Journal	Optics Communications
Volume	557
Early online date	29 Jan 2024
DOIs	https://doi.org/10.1016/j.optcom.2024.130326
Publication status	Published - 15 Apr 2024

Bibliographical note

Funding

This work was supported by EU Horizon 2020 Project [101008280]; National Key Research and Development Program of China [2022YFE0202100]; UK Royal Society Grant (IES\R3\223068); UK EPSRC [Grant EP/Y000315/1]; and UK EPSRC [Grant EP/V000969/1 (ARGON)].

Funders	Funder number
EU Horizon 2020 Project	101008280
Engineering and Physical Sciences Research Council	EP/V000969/1, EP/Y000315/1
Royal Society	IES\R3\223068
National Key Research and Development Program of China	2022YFE0202100

Keywords

Carrier phase recovery
Equalization enhanced phase noise
High-order modulation formats
Laser phase noise
Optical fiber communication

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10.1016/j.optcom.2024.130326Licence: CC BY 4.0

1-s2.0-S0030401824000634-main
© 2024 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Final published version, 1.56 MBLicence: CC BY 4.0

Cite this

@article{e808208d1b794fd38476898793efb2a9,

title = "Improved carrier phase recovery for high-capacity optical communication systems with high-order modulation formats",

abstract = "A modified Viterbi-Viterbi (MVV) carrier phase recovery (CPR) algorithm is comprehensively studied based on the quadrature phase-shift-keying (QPSK) partition scheme. By improving the QPSK partition scheme for the 16-ary quadrature amplitude modulation (16QAM), MVV algorithm is developed for the optical fiber communication systems with the modulation formats of dual-polarization 64-QAM (DP-64QAM) and DP-256QAM. Numerical simulations have been carried out in a 9-channel Nyquist-spaced 32-Gbaud optical transmission system for different modulation formats and the performance of MVV CPR with respect to pilot-aided (PA) CPR has been examined. Results show that MVV CPR can significantly mitigate the laser phase noise in the system using high-order modulation formats. Compared to PA CPR, MVV CPR performs better with the increase of the transmission distance, where the impact of equalization enhanced phase noise has to be taken into account. Furthermore, MVV has been compared with other CPR approaches in terms of the performance and the computational complexity.",

keywords = "Carrier phase recovery, Equalization enhanced phase noise, High-order modulation formats, Laser phase noise, Optical fiber communication",

author = "Yunfan Zhang and Tiegen Liu and Cenqin Jin and Tongyang Xu and Mingming Tan and Jian Zhao and Tianhua Xu",

note = "{\textcopyright} 2024 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). ",

year = "2024",

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day = "15",

doi = "10.1016/j.optcom.2024.130326",

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T1 - Improved carrier phase recovery for high-capacity optical communication systems with high-order modulation formats

AU - Zhang, Yunfan

AU - Liu, Tiegen

AU - Jin, Cenqin

AU - Xu, Tongyang

AU - Tan, Mingming

AU - Zhao, Jian

AU - Xu, Tianhua

PY - 2024/4/15

Y1 - 2024/4/15

N2 - A modified Viterbi-Viterbi (MVV) carrier phase recovery (CPR) algorithm is comprehensively studied based on the quadrature phase-shift-keying (QPSK) partition scheme. By improving the QPSK partition scheme for the 16-ary quadrature amplitude modulation (16QAM), MVV algorithm is developed for the optical fiber communication systems with the modulation formats of dual-polarization 64-QAM (DP-64QAM) and DP-256QAM. Numerical simulations have been carried out in a 9-channel Nyquist-spaced 32-Gbaud optical transmission system for different modulation formats and the performance of MVV CPR with respect to pilot-aided (PA) CPR has been examined. Results show that MVV CPR can significantly mitigate the laser phase noise in the system using high-order modulation formats. Compared to PA CPR, MVV CPR performs better with the increase of the transmission distance, where the impact of equalization enhanced phase noise has to be taken into account. Furthermore, MVV has been compared with other CPR approaches in terms of the performance and the computational complexity.

AB - A modified Viterbi-Viterbi (MVV) carrier phase recovery (CPR) algorithm is comprehensively studied based on the quadrature phase-shift-keying (QPSK) partition scheme. By improving the QPSK partition scheme for the 16-ary quadrature amplitude modulation (16QAM), MVV algorithm is developed for the optical fiber communication systems with the modulation formats of dual-polarization 64-QAM (DP-64QAM) and DP-256QAM. Numerical simulations have been carried out in a 9-channel Nyquist-spaced 32-Gbaud optical transmission system for different modulation formats and the performance of MVV CPR with respect to pilot-aided (PA) CPR has been examined. Results show that MVV CPR can significantly mitigate the laser phase noise in the system using high-order modulation formats. Compared to PA CPR, MVV CPR performs better with the increase of the transmission distance, where the impact of equalization enhanced phase noise has to be taken into account. Furthermore, MVV has been compared with other CPR approaches in terms of the performance and the computational complexity.

KW - Carrier phase recovery

KW - Equalization enhanced phase noise

KW - High-order modulation formats

KW - Laser phase noise

KW - Optical fiber communication

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JO - Optics Communications

JF - Optics Communications

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Improved carrier phase recovery for high-capacity optical communication systems with high-order modulation formats

Abstract

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Keywords

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