List-encoding CCDM: A Nonlinearity-tolerant Shaper Aided by Energy Dispersion Index

Kaiquan Wu; Gabriele Liga; Alireza Sheikh; Yunus Can Gültekin; Frans M.J. Willems; Alex  Alvarado

doi:10.1109/JLT.2021.3125783

List-encoding CCDM: A Nonlinearity-tolerant Shaper Aided by Energy Dispersion Index

Kaiquan Wu (Corresponding author), Gabriele Liga, Alireza Sheikh, Yunus Can Gültekin, Frans M.J. Willems, Alex Alvarado

Research output: Contribution to journal › Article › Academic › peer-review

18 Citations (Scopus)

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Abstract

Recently, a metric called energy dispersion index (EDI) was proposed to qualitatively indicate the nonlinear interference (NLI) induced by correlated symbols during optical transmission. In this paper, we propose a new shaper architecture to decrease the EDI of transmitted symbols and thus, increase the signal-to-noise ratio (SNR). We call this shaper the list-encoding constant-composition distribution matcher (L-CCDM). L-CCDM consists of an additional EDI selecting module, which is compatible with standard probabilistic amplitude shaping (PAS) architecture. Numerical results obtained from a multi-span multi-channel system show that when compared to standard CCDM with 256-ary quadrature amplitude modulation (256QAM), the proposed architecture offers an effective SNR gain of 0.35 dB, an achievable information rate gain of 0.22 bit/4D-symbol, or equivalently an 8% reach extension.

Original language	English
Pages (from-to)	1064-1071
Number of pages	8
Journal	Journal of Lightwave Technology
Volume	40
Issue number	4
Early online date	13 Nov 2021
DOIs	https://doi.org/10.1109/JLT.2021.3125783
Publication status	Published - 15 Feb 2022

Funding

Funders	Funder number
European Union's Horizon 2020 - Research and Innovation Framework Programme	754462, 757791

Keywords

Constant-composition distribution matching
fiber nonlinearities
probabilistic amplitude shaping

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10.1109/JLT.2021.3125783

pdfFinal published version, 1.4 MBLicence: TAVERNE

Cite this

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title = "List-encoding CCDM: A Nonlinearity-tolerant Shaper Aided by Energy Dispersion Index",

abstract = "Recently, a metric called energy dispersion index (EDI) was proposed to qualitatively indicate the nonlinear interference (NLI) induced by correlated symbols during optical transmission. In this paper, we propose a new shaper architecture to decrease the EDI of transmitted symbols and thus, increase the signal-to-noise ratio (SNR). We call this shaper the list-encoding constant-composition distribution matcher (L-CCDM). L-CCDM consists of an additional EDI selecting module, which is compatible with standard probabilistic amplitude shaping (PAS) architecture. Numerical results obtained from a multi-span multi-channel system show that when compared to standard CCDM with 256-ary quadrature amplitude modulation (256QAM), the proposed architecture offers an effective SNR gain of 0.35 dB, an achievable information rate gain of 0.22 bit/4D-symbol, or equivalently an 8% reach extension.",

keywords = "Constant-composition distribution matching, fiber nonlinearities, probabilistic amplitude shaping",

author = "Kaiquan Wu and Gabriele Liga and Alireza Sheikh and G{\"u}ltekin, {Yunus Can} and Willems, {Frans M.J.} and Alex Alvarado",

year = "2022",

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doi = "10.1109/JLT.2021.3125783",

language = "English",

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T1 - List-encoding CCDM: A Nonlinearity-tolerant Shaper Aided by Energy Dispersion Index

AU - Wu, Kaiquan

AU - Liga, Gabriele

AU - Sheikh, Alireza

AU - Gültekin, Yunus Can

AU - Willems, Frans M.J.

AU - Alvarado, Alex

PY - 2022/2/15

Y1 - 2022/2/15

N2 - Recently, a metric called energy dispersion index (EDI) was proposed to qualitatively indicate the nonlinear interference (NLI) induced by correlated symbols during optical transmission. In this paper, we propose a new shaper architecture to decrease the EDI of transmitted symbols and thus, increase the signal-to-noise ratio (SNR). We call this shaper the list-encoding constant-composition distribution matcher (L-CCDM). L-CCDM consists of an additional EDI selecting module, which is compatible with standard probabilistic amplitude shaping (PAS) architecture. Numerical results obtained from a multi-span multi-channel system show that when compared to standard CCDM with 256-ary quadrature amplitude modulation (256QAM), the proposed architecture offers an effective SNR gain of 0.35 dB, an achievable information rate gain of 0.22 bit/4D-symbol, or equivalently an 8% reach extension.

AB - Recently, a metric called energy dispersion index (EDI) was proposed to qualitatively indicate the nonlinear interference (NLI) induced by correlated symbols during optical transmission. In this paper, we propose a new shaper architecture to decrease the EDI of transmitted symbols and thus, increase the signal-to-noise ratio (SNR). We call this shaper the list-encoding constant-composition distribution matcher (L-CCDM). L-CCDM consists of an additional EDI selecting module, which is compatible with standard probabilistic amplitude shaping (PAS) architecture. Numerical results obtained from a multi-span multi-channel system show that when compared to standard CCDM with 256-ary quadrature amplitude modulation (256QAM), the proposed architecture offers an effective SNR gain of 0.35 dB, an achievable information rate gain of 0.22 bit/4D-symbol, or equivalently an 8% reach extension.

KW - Constant-composition distribution matching

KW - fiber nonlinearities

KW - probabilistic amplitude shaping

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DO - 10.1109/JLT.2021.3125783

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EP - 1071

JO - Journal of Lightwave Technology

JF - Journal of Lightwave Technology

IS - 4

ER -

List-encoding CCDM: A Nonlinearity-tolerant Shaper Aided by Energy Dispersion Index

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

FUN-NOTCH: Fundamentals of the Nonlinear Optical Channel

ICONIC: Increasing the Capacity of Optical Nonlinear Interfering Channels

Cite this

List-encoding CCDM: A Nonlinearity-tolerant Shaper Aided by Energy Dispersion Index

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Projects

FUN-NOTCH: Fundamentals of the Nonlinear Optical Channel

ICONIC: Increasing the Capacity of Optical Nonlinear Interfering Channels

Cite this