14 May 2018 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.
Conference Presentation
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I. S. Terekhov, I. S. Terekhov, A. V. Reznichenko, A. V. Reznichenko, S. K. Turitsyn, S. K. Turitsyn, } "Optimal input signal distribution and capacity for nondispersive nonlinear optical fiber channel at large signal to noise ratio", Proc. SPIE 10684, Nonlinear Optics and its Applications 2018, 106840W (14 May 2018); doi: 10.1117/12.2307299; https://doi.org/10.1117/12.2307299
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