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  • Irukulapati, Naga Vishnukanth, 1987, et al. (author)
  • Improved Lower Bounds on Mutual Information Accounting for Nonlinear Signal--Noise Interaction
  • 2018
  • In: Journal of Lightwave Technology. - 0733-8724 .- 1558-2213. ; 36:22, s. 5152-5159
  • Journal article (peer-reviewed)abstract
    • In fiber-optic communications, evaluation of mutual information (MI) is still an open issue due to the unavailability of an exact and mathematically tractable channel model. Traditionally, lower bounds on MI are computed by approximating the (original) channel with an auxiliary forward channel. In this paper, lower bounds are computed using an auxiliary backward channel, which has not been previously considered in the context of fiber-optic communications. Distributions obtained through two variations of the stochastic digital backpropagation (SDBP) algorithm are used as auxiliary backward channels and these bounds are compared with bounds obtained through the conventional digital backpropagation (DBP). Through simulations, higher information rates were achieved with SDBP, which can be explained by the ability of SDBP to account for nonlinear signal--noise interactions
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Wymeersch, Henk, 197 ... (1)
Agrell, Erik, 1965 (1)
Irukulapati, Naga Vi ... (1)
Johannisson, Pontus (1)
Secondini, Marco (1)
University
Chalmers University of Technology (1)
RISE (1)
Language
English (1)
Research subject (UKÄ/SCB)
Engineering and Technology (1)
Year
2018 (1)

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