Constellation Shaping for WDM systems using 256QAM/1024QAM with
  Probabilistic Optimization

Metodi Plamenov Yankov; Francesco Da Ros; Edson Porto da Silva; Søren Forchhammer; Knud J. Larsen; Leif Katsuo Oxenløwe; Michael Galili; Darko Zibar

doi:10.1109/JLT.2016.2607798

Constellation Shaping for WDM systems using 256QAM/1024QAM with Probabilistic Optimization

Metodi Plamenov Yankov, Francesco Da Ros, Edson Porto da Silva, Søren Forchhammer, Knud J. Larsen, Leif Katsuo Oxenløwe, Michael Galili, Darko Zibar

Research output: Contribution to journal › Journal article › Research › peer-review

1424 Downloads (Pure)

Abstract

In this paper, probabilistic shaping is numerically and experimentallyinvestigated for increasing the transmission reach of wavelength divisionmultiplexed (WDM) optical communication system employing quadrature amplitudemodulation (QAM). An optimized probability mass function (PMF) of the QAMsymbols is first found from a modified Blahut-Arimoto algorithm for the opticalchannel. A turbo coded bit interleaved coded modulation system is then applied,which relies on many-to-one labeling to achieve the desired PMF, therebyachieving shaping gain. Pilot symbols at rate at most 2% are used forsynchronization and equalization, making it possible to receive inputconstellations as large as 1024QAM. The system is evaluated experimentally on a10 GBaud, 5 channels WDM setup. The maximum system reach is increased w.r.t.standard 1024QAM by 20% at input data rate of 4.65 bits/symbol and up to 75% at5.46 bits/symbol. It is shown that rate adaptation does not require changing ofthe modulation format. The performance of the proposed 1024QAM shaped system isvalidated on all 5 channels of the WDM signal for selected distances and rates.Finally, it was shown via EXIT charts and BER analysis that iterativedemapping, while generally beneficial to the system, is not a requirement forachieving the shaping gain.

Original language	English
Journal	Journal of Lightwave Technology
Volume	34
Issue number	22
Pages (from-to)	5146 - 5156
ISSN	0733-8724
DOIs	https://doi.org/10.1109/JLT.2016.2607798
Publication status	Published - 2016

Bibliographical note

(c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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 components of this work in other works.

Keywords

WDM
Probabilistic shaping
Experimental demonstrations
1024QAM
Nonlinear transmission

Access to Document

10.1109/JLT.2016.2607798

JLT 2016 finalVersionAccepted author manuscript, 859 KB

SFX availability

Full text

Cite this

@article{c43de900424d42bfaf9c4ac0be2cde88,

title = "Constellation Shaping for WDM systems using 256QAM/1024QAM with Probabilistic Optimization",

abstract = "In this paper, probabilistic shaping is numerically and experimentallyinvestigated for increasing the transmission reach of wavelength divisionmultiplexed (WDM) optical communication system employing quadrature amplitudemodulation (QAM). An optimized probability mass function (PMF) of the QAMsymbols is first found from a modified Blahut-Arimoto algorithm for the opticalchannel. A turbo coded bit interleaved coded modulation system is then applied,which relies on many-to-one labeling to achieve the desired PMF, therebyachieving shaping gain. Pilot symbols at rate at most 2% are used forsynchronization and equalization, making it possible to receive inputconstellations as large as 1024QAM. The system is evaluated experimentally on a10 GBaud, 5 channels WDM setup. The maximum system reach is increased w.r.t.standard 1024QAM by 20% at input data rate of 4.65 bits/symbol and up to 75% at5.46 bits/symbol. It is shown that rate adaptation does not require changing ofthe modulation format. The performance of the proposed 1024QAM shaped system isvalidated on all 5 channels of the WDM signal for selected distances and rates.Finally, it was shown via EXIT charts and BER analysis that iterativedemapping, while generally beneficial to the system, is not a requirement forachieving the shaping gain.",

keywords = "WDM, Probabilistic shaping, Experimental demonstrations, 1024QAM, Nonlinear transmission",

author = "Yankov, {Metodi Plamenov} and {Da Ros}, Francesco and {Porto da Silva}, Edson and S{\o}ren Forchhammer and Larsen, {Knud J.} and Oxenl{\o}we, {Leif Katsuo} and Michael Galili and Darko Zibar",

note = "(c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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 components of this work in other works.",

year = "2016",

doi = "10.1109/JLT.2016.2607798",

language = "English",

volume = "34",

pages = "5146 -- 5156",

journal = "Journal of Lightwave Technology",

issn = "0733-8724",

publisher = "Institute of Electrical and Electronics Engineers",

number = "22",

}

Constellation Shaping for WDM systems using 256QAM/1024QAM with Probabilistic Optimization. / Yankov, Metodi Plamenov ; Da Ros, Francesco; Porto da Silva, Edson; Forchhammer, Søren; Larsen, Knud J.; Oxenløwe, Leif Katsuo ; Galili, Michael ; Zibar, Darko.

In: Journal of Lightwave Technology, Vol. 34, No. 22, 2016, p. 5146 - 5156.

Research output: Contribution to journal › Journal article › Research › peer-review

TY - JOUR

T1 - Constellation Shaping for WDM systems using 256QAM/1024QAM with Probabilistic Optimization

AU - Yankov, Metodi Plamenov

AU - Da Ros, Francesco

AU - Porto da Silva, Edson

AU - Forchhammer, Søren

AU - Larsen, Knud J.

AU - Oxenløwe, Leif Katsuo

AU - Galili, Michael

AU - Zibar, Darko

N1 - (c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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 components of this work in other works.

PY - 2016

Y1 - 2016

N2 - In this paper, probabilistic shaping is numerically and experimentallyinvestigated for increasing the transmission reach of wavelength divisionmultiplexed (WDM) optical communication system employing quadrature amplitudemodulation (QAM). An optimized probability mass function (PMF) of the QAMsymbols is first found from a modified Blahut-Arimoto algorithm for the opticalchannel. A turbo coded bit interleaved coded modulation system is then applied,which relies on many-to-one labeling to achieve the desired PMF, therebyachieving shaping gain. Pilot symbols at rate at most 2% are used forsynchronization and equalization, making it possible to receive inputconstellations as large as 1024QAM. The system is evaluated experimentally on a10 GBaud, 5 channels WDM setup. The maximum system reach is increased w.r.t.standard 1024QAM by 20% at input data rate of 4.65 bits/symbol and up to 75% at5.46 bits/symbol. It is shown that rate adaptation does not require changing ofthe modulation format. The performance of the proposed 1024QAM shaped system isvalidated on all 5 channels of the WDM signal for selected distances and rates.Finally, it was shown via EXIT charts and BER analysis that iterativedemapping, while generally beneficial to the system, is not a requirement forachieving the shaping gain.

AB - In this paper, probabilistic shaping is numerically and experimentallyinvestigated for increasing the transmission reach of wavelength divisionmultiplexed (WDM) optical communication system employing quadrature amplitudemodulation (QAM). An optimized probability mass function (PMF) of the QAMsymbols is first found from a modified Blahut-Arimoto algorithm for the opticalchannel. A turbo coded bit interleaved coded modulation system is then applied,which relies on many-to-one labeling to achieve the desired PMF, therebyachieving shaping gain. Pilot symbols at rate at most 2% are used forsynchronization and equalization, making it possible to receive inputconstellations as large as 1024QAM. The system is evaluated experimentally on a10 GBaud, 5 channels WDM setup. The maximum system reach is increased w.r.t.standard 1024QAM by 20% at input data rate of 4.65 bits/symbol and up to 75% at5.46 bits/symbol. It is shown that rate adaptation does not require changing ofthe modulation format. The performance of the proposed 1024QAM shaped system isvalidated on all 5 channels of the WDM signal for selected distances and rates.Finally, it was shown via EXIT charts and BER analysis that iterativedemapping, while generally beneficial to the system, is not a requirement forachieving the shaping gain.

KW - WDM

KW - Probabilistic shaping

KW - Experimental demonstrations

KW - 1024QAM

KW - Nonlinear transmission

U2 - 10.1109/JLT.2016.2607798

DO - 10.1109/JLT.2016.2607798

M3 - Journal article

VL - 34

SP - 5146

EP - 5156

JO - Journal of Lightwave Technology

JF - Journal of Lightwave Technology

SN - 0733-8724

IS - 22

ER -