Mitigating Nonlinear Interference by Limiting Energy Variations in Sphere Shaping

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Jan 10, 2022
Yunus Can Gültekin, Alex Alvarado, Olga Vassilieva, Inwoong Kim, Paparao Palacharla, Chigo Okonkwo, Frans M. J. Willems
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Band-trellis enumerative sphere shaping is proposed to decrease the energy variations in channel input sequences. Against sphere shaping, 0.74 dB SNR gain and up to 9% increase in data rates are demonstrated for single-span systems.

* 3 pages, 4 figures, accepted to be presented at the OFC 2022, a few numeric typos are corrected (v2: a typo in the caption of Fig. 4 is fixed)  
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