Abstract
The problem of analytical evaluation of the maximum rate at which information can be reliably
transmitted on a nonlinear wavelength division multiplexing fiber-optic channel with a given modulation format and
detection strategy is addressed. An approximate solution of the nonlinear Schrödinger equation is adopted to
obtain an accurate analytical discrete-time channel model, valid for arbitrary link configurations and modulation
formats. By exploiting the concept of mismatched decoding, considering a sub-optimum detection strategy that accounts
for intra-channel nonlinearities, the proposed model is employed to derive closed-form expressions of the achievable
information rate with various modulation formats. All the analytical results are verified through comparison with
numerical simulations in different scenarios.
© 2013 IEEE
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