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Recurrent Neural Network Soft Demapping for Mitigation of Fiber Nonlinearities and ISI

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Abstract

Optical transmission systems suffer from linear and nonlinear impairments induced by components and fibers. As countermeasures, neural network soft-demappers are proposed and benchmarked against combinations of digital back-propagation, Volterra equalizers, noise whitening and soft-output Viterbi-algorithms.

© 2021 The Author(s)

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