Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Simple and Accurate Closed-Form EGN Model Formula   The GN model of non-linear fiber propagation has been shown to overestimate
the variance of non-linearity due to the signal Gaussianity approximation,
leading to maximum reach predictions for typical optical systems which may be
pessimistic by about 5% to 15%, depending on fiber type and system set-up.
Various models have been proposed which improve over the GN model accuracy. One
of them is the EGN model, which completely removes the Gaussianity
approximation from all non-linear interference (NLI) components. The EGN model
is, however, substantially more complex than the GN model. Recently, we
proposed a simple closed-form formula which permits to approximate the EGN
model, starting from the GN. It was however limited to all-identical,
equispaced channels, and did not correct single-channel NLI (also called SCI).
In this follow-up contribution, we propose an improved version which both
allows to address non-identical channels and corrects the SCI contribution as
well. Extensive simulative testing shows the new formula to be asymptotically
very accurate, for sufficiently large number of spans. This is a preliminary
document which will be followed by a journal submission.

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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
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The categories of this paper are: hep-th
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The categories of this paper are: solv-int
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The categories of this paper are: q-bio
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The categories of this paper are: stat
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The categories of this paper are: comp-gas
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The categories of this paper are: nlin
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The categories of this paper are: q-fin
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The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
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The categories of this paper are: math
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The categories of this paper are: econ
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The categories of this paper are: q-alg