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.
|Title of host publication||Nonlinear Optics and its Applications 2018|
|Publication status||Published - 14 May 2018|
|Event||Nonlinear Optics and its Applications 2018 - Strasbourg, France|
Duration: 23 Apr 2018 → 25 Apr 2018
|Name||Proceedings of SPIE|
|Conference||Nonlinear Optics and its Applications 2018|
|Period||23/04/18 → 25/04/18|
Bibliographical noteCopyright 2018 SPIE. One print or electronic copy may be made for personal use only. Systematic reproduction, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
- Channel capacity