An Experimental Demonstration of Rate- Adaptation Using Shaped Polar Codes for Flexible Optical Networks

Shajeel Iqbal*, Edson Porto da Silva, Metodi Plamenov Yankov, Leif Katsuo Oxenløwe, Søren Forchhammer

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

181 Downloads (Pure)

Abstract

In this paper, we propose a polar-coded transmission system with adjustable data rate for coherent optical transmission employing quadrature amplitude modulation (QAM). The proposed system is based on a many-to-one constellation shaping method for achieving a range of data rates with arbitrarily small rate steps. An implicitly punctured polar-coded modulation system is then designed by combining polar coded bit-interleaved coded modulation system (BICM) with many-to-one labellings. The scheme is experimentally evaluated in a wavelength division multiplexed (WDM) system with five carriers modulated at 16 GBaud with polarization multiplexed (PM) 256QAM. Data rates ranging from 121 Gbps to 182 Gbps per carrier are experimentally demonstrated and the system can be directly extended to achieve higher data rates. Synchronization and equalization of PM-256QAM received symbols is performed with a pilot rate of 5%. The experimental results show 1.2 dB of shaping gain over the conventionally punctured polar codes in the optical back-to-back scenario. The maximum transmission system reach is increased by 200 km to 400 km w.r.t the conventionally punctured polar codes. It is shown that the rate adaptation does not require a change of modulation format and/or underlying forward error-correction (FEC) code. Finally, the performance of all 5 WDM channels is validated for the optimal input power.
Original languageEnglish
JournalJournal of Lightwave Technology
Volume37
Issue number13
Pages (from-to)3357 - 3364
ISSN0733-8724
DOIs
Publication statusPublished - 2019

Keywords

  • Polar codes
  • Experimental demonstration
  • Probabilistic shaping
  • Wavelength division multiplexing (WDM)
  • Rate-adaptation

Cite this

@article{5977fb1b6cd54ae68ee8011ff4f8a70a,
title = "An Experimental Demonstration of Rate- Adaptation Using Shaped Polar Codes for Flexible Optical Networks",
abstract = "In this paper, we propose a polar-coded transmission system with adjustable data rate for coherent optical transmission employing quadrature amplitude modulation (QAM). The proposed system is based on a many-to-one constellation shaping method for achieving a range of data rates with arbitrarily small rate steps. An implicitly punctured polar-coded modulation system is then designed by combining polar coded bit-interleaved coded modulation system (BICM) with many-to-one labellings. The scheme is experimentally evaluated in a wavelength division multiplexed (WDM) system with five carriers modulated at 16 GBaud with polarization multiplexed (PM) 256QAM. Data rates ranging from 121 Gbps to 182 Gbps per carrier are experimentally demonstrated and the system can be directly extended to achieve higher data rates. Synchronization and equalization of PM-256QAM received symbols is performed with a pilot rate of 5{\%}. The experimental results show 1.2 dB of shaping gain over the conventionally punctured polar codes in the optical back-to-back scenario. The maximum transmission system reach is increased by 200 km to 400 km w.r.t the conventionally punctured polar codes. It is shown that the rate adaptation does not require a change of modulation format and/or underlying forward error-correction (FEC) code. Finally, the performance of all 5 WDM channels is validated for the optimal input power.",
keywords = "Polar codes, Experimental demonstration, Probabilistic shaping, Wavelength division multiplexing (WDM), Rate-adaptation",
author = "Shajeel Iqbal and {Porto da Silva}, Edson and Yankov, {Metodi Plamenov} and Oxenl{\o}we, {Leif Katsuo} and S{\o}ren Forchhammer",
year = "2019",
doi = "10.1109/JLT.2019.2915916",
language = "English",
volume = "37",
pages = "3357 -- 3364",
journal = "Journal of Lightwave Technology",
issn = "0733-8724",
publisher = "Institute of Electrical and Electronics Engineers",
number = "13",

}

An Experimental Demonstration of Rate- Adaptation Using Shaped Polar Codes for Flexible Optical Networks. / Iqbal, Shajeel; Porto da Silva, Edson; Yankov, Metodi Plamenov; Oxenløwe, Leif Katsuo; Forchhammer, Søren.

In: Journal of Lightwave Technology, Vol. 37, No. 13, 2019, p. 3357 - 3364.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - An Experimental Demonstration of Rate- Adaptation Using Shaped Polar Codes for Flexible Optical Networks

AU - Iqbal, Shajeel

AU - Porto da Silva, Edson

AU - Yankov, Metodi Plamenov

AU - Oxenløwe, Leif Katsuo

AU - Forchhammer, Søren

PY - 2019

Y1 - 2019

N2 - In this paper, we propose a polar-coded transmission system with adjustable data rate for coherent optical transmission employing quadrature amplitude modulation (QAM). The proposed system is based on a many-to-one constellation shaping method for achieving a range of data rates with arbitrarily small rate steps. An implicitly punctured polar-coded modulation system is then designed by combining polar coded bit-interleaved coded modulation system (BICM) with many-to-one labellings. The scheme is experimentally evaluated in a wavelength division multiplexed (WDM) system with five carriers modulated at 16 GBaud with polarization multiplexed (PM) 256QAM. Data rates ranging from 121 Gbps to 182 Gbps per carrier are experimentally demonstrated and the system can be directly extended to achieve higher data rates. Synchronization and equalization of PM-256QAM received symbols is performed with a pilot rate of 5%. The experimental results show 1.2 dB of shaping gain over the conventionally punctured polar codes in the optical back-to-back scenario. The maximum transmission system reach is increased by 200 km to 400 km w.r.t the conventionally punctured polar codes. It is shown that the rate adaptation does not require a change of modulation format and/or underlying forward error-correction (FEC) code. Finally, the performance of all 5 WDM channels is validated for the optimal input power.

AB - In this paper, we propose a polar-coded transmission system with adjustable data rate for coherent optical transmission employing quadrature amplitude modulation (QAM). The proposed system is based on a many-to-one constellation shaping method for achieving a range of data rates with arbitrarily small rate steps. An implicitly punctured polar-coded modulation system is then designed by combining polar coded bit-interleaved coded modulation system (BICM) with many-to-one labellings. The scheme is experimentally evaluated in a wavelength division multiplexed (WDM) system with five carriers modulated at 16 GBaud with polarization multiplexed (PM) 256QAM. Data rates ranging from 121 Gbps to 182 Gbps per carrier are experimentally demonstrated and the system can be directly extended to achieve higher data rates. Synchronization and equalization of PM-256QAM received symbols is performed with a pilot rate of 5%. The experimental results show 1.2 dB of shaping gain over the conventionally punctured polar codes in the optical back-to-back scenario. The maximum transmission system reach is increased by 200 km to 400 km w.r.t the conventionally punctured polar codes. It is shown that the rate adaptation does not require a change of modulation format and/or underlying forward error-correction (FEC) code. Finally, the performance of all 5 WDM channels is validated for the optimal input power.

KW - Polar codes

KW - Experimental demonstration

KW - Probabilistic shaping

KW - Wavelength division multiplexing (WDM)

KW - Rate-adaptation

U2 - 10.1109/JLT.2019.2915916

DO - 10.1109/JLT.2019.2915916

M3 - Journal article

VL - 37

SP - 3357

EP - 3364

JO - Journal of Lightwave Technology

JF - Journal of Lightwave Technology

SN - 0733-8724

IS - 13

ER -