Optimal input signal distribution and capacity for nondispersive nonlinear optical fiber channel at large signal to noise ratio

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Abstract

We consider a model nondispersive nonlinear optical fiber channel with additive Gaussian noise at large SNR (signal-to-noise ratio) in the intermediate power region. Using Feynman path-integral technique we find the optimal input signal distribution maximizing the channel's per-sample mutual information. The finding of the optimal input signal distribution allows us to improve previously known estimates for the channel capacity. We show that in the intermediate power regime the per-sample mutual information for the optimal input signal distribution is greater than the per-sample mutual information for the Gaussian and half-Gaussian input signal distributions.

Original languageEnglish
Title of host publicationNonlinear Optics and its Applications 2018
EditorsBJ Eggleton, NGR Broderick, AC Peacock
PublisherSPIE
Number of pages8
Volume10684
ISBN (Electronic)9781510618947
DOIs
Publication statusPublished - 1 Jan 2018
EventNonlinear Optics and its Applications 2018 - Strasbourg, France
Duration: 23 Apr 201825 Apr 2018

Publication series

NameProceedings of SPIE
PublisherSPIE-INT SOC OPTICAL ENGINEERING
Volume10684
ISSN (Print)0277-786X

Conference

ConferenceNonlinear Optics and its Applications 2018
CountryFrance
CityStrasbourg
Period23.04.201825.04.2018

Keywords

  • Channel capacity
  • Path-integral
  • LIMITS
  • path-integral

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