Channel Capacity Calculation at Large SNR and Small Dispersion within Path-Integral Approach

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Abstract

We consider the optical fiber channel modelled by the nonlinear Shrödinger equation with additive white Gaussian noise. Using Feynman path-integral approach for the model with small dispersion we find the first nonzero corrections to the conditional probability density function and the channel capacity estimations at large signal-to-noise ratio. We demonstrate that the correction to the channel capacity in small dimensionless dispersion parameter is quadratic and positive therefore increasing the earlier calculated capacity for a nondispersive nonlinear optical fiber channel in the intermediate power region. Also for small dispersion case we find the analytical expressions for simple correlators of the output signals in our noisy channel.

Original languageEnglish
Article number012016
Number of pages10
JournalJournal of Physics: Conference Series
Volume999
Issue number1
DOIs
Publication statusPublished - 5 Apr 2018

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