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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 |
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Article number | 9222115 |
Pages (from-to) | 1435-1438 |
Number of pages | 4 |
Journal | IEEE Photonics Technology Letters |
Volume | 32 |
Issue number | 22 |
DOIs | |
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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- 2 Active
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Fundamentals of the Nonlinear Optical Channel
Alvarado, A., Liga, G., Barreiro, A., Willems, F. M. J., Sanders, R., Alvarado, A., Barreiro, A., Sheikh, A., Goossens, S., de Jonge, M., Gültekin, Y. C., Ramachandran, V., Jaffal, Y. & Oliari, V.
1/01/18 → 30/06/23
Project: Research direct
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ICONIC: Increasing the Capacity of Optical Nonlinear Interfering Channels
Alvarado, A., Alvarado, A., Willems, F. M. J., Sanders, R., Alvarado, A., Barreiro, A., Wu, K., de Jonge, M., Karanov, B., Karanov, B., Lee, J. & Oliari, V.
1/08/17 → 31/07/23
Project: Research direct