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

Authors :
Amari, Abdelkerim
Lampe, Lutz
Soman, Sunish Kumar Orappanpara
Gultekin, Yunus Can
Alvarado, Alex
Source :
IEEE Photonics Technology Letters; 11/15/2020, Vol. 32 Issue 22, p1435-1438, 4p
Publication Year :
2020

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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
10411135
Volume :
32
Issue :
22
Database :
Complementary Index
Journal :
IEEE Photonics Technology Letters
Publication Type :
Academic Journal
Accession number :
147319104
Full Text :
https://doi.org/10.1109/LPT.2020.3030696