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

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review


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.

Originele taal-2Engels
Pagina's (van-tot)1435-1438
Aantal pagina's4
TijdschriftIEEE Photonics Technology Letters
Nummer van het tijdschrift22
StatusGepubliceerd - 15 nov 2020


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