Comparison of Short Blocklength Sphere Shaping and Nonlinearity Compensation in WDM Systems

Abdelkerim Amari; Lutz Lampe; Sunish Kumar Orappanpara Soman; Yunus Can Gultekin; Alex Alvarado

doi:10.1109/LPT.2020.3030696

Comparison of Short Blocklength Sphere Shaping and Nonlinearity Compensation in WDM Systems

Abdelkerim Amari (Corresponding author), Lutz Lampe, Sunish Kumar Orappanpara Soman, Yunus Can Gultekin, Alex Alvarado

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

Abstract

In optical communication systems, short blocklength probabilistic enumerative sphere shaping (ESS) provides both linear shaping gain and nonlinear tolerance. In this work, we investigate the performance and complexity of ESS in comparison with fiber nonlinearity compensation via digital back propagation (DBP) with different steps per span. We evaluate the impact of the shaping blocklength in terms of nonlinear tolerance and also consider the case of ESS with a Volterra-based nonlinear equalizer (VNLE), which provides lower complexity than DBP. In single-channel transmission, ESS with VNLE achieves similar performance in terms of finite length bit-metric decoding rate to uniform signaling with one step per span DBP. In the context of a dense wavelength-division multiplexing (WDM) transmission system, we show that ESS outperforms uniform signaling with DBP for different step sizes.

Original language	English
Article number	9222115
Pages (from-to)	1435-1438
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	32
Issue number	22
DOIs	https://doi.org/10.1109/LPT.2020.3030696
Publication status	Published - 15 Nov 2020

Keywords

Digital back propagation
enumerative sphere shaping
fiber nonlinearity compensation
optical communication systems
probabilistic shaping
Volterra series

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10.1109/LPT.2020.3030696

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title = "Comparison of Short Blocklength Sphere Shaping and Nonlinearity Compensation in WDM Systems",

abstract = "In optical communication systems, short blocklength probabilistic enumerative sphere shaping (ESS) provides both linear shaping gain and nonlinear tolerance. In this work, we investigate the performance and complexity of ESS in comparison with fiber nonlinearity compensation via digital back propagation (DBP) with different steps per span. We evaluate the impact of the shaping blocklength in terms of nonlinear tolerance and also consider the case of ESS with a Volterra-based nonlinear equalizer (VNLE), which provides lower complexity than DBP. In single-channel transmission, ESS with VNLE achieves similar performance in terms of finite length bit-metric decoding rate to uniform signaling with one step per span DBP. In the context of a dense wavelength-division multiplexing (WDM) transmission system, we show that ESS outperforms uniform signaling with DBP for different step sizes.",

keywords = "Digital back propagation, enumerative sphere shaping, fiber nonlinearity compensation, optical communication systems, probabilistic shaping, Volterra series",

author = "Abdelkerim Amari and Lutz Lampe and Soman, {Sunish Kumar Orappanpara} and Gultekin, {Yunus Can} and Alex Alvarado",

year = "2020",

month = nov,

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doi = "10.1109/LPT.2020.3030696",

language = "English",

volume = "32",

pages = "1435--1438",

journal = "IEEE Photonics Technology Letters",

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publisher = "Institute of Electrical and Electronics Engineers",

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Comparison of Short Blocklength Sphere Shaping and Nonlinearity Compensation in WDM Systems. / Amari, Abdelkerim (Corresponding author); Lampe, Lutz; Soman, Sunish Kumar Orappanpara; Gultekin, Yunus Can ; Alvarado, Alex.

In: IEEE Photonics Technology Letters, Vol. 32, No. 22, 9222115, 15.11.2020, p. 1435-1438.

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

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