Why Constant-Composition Codes Reduce Nonlinear Interference Noise
arXiv:2203.02641 · doi:10.1109/JLT.2023.3244927
Abstract
A time-domain perturbation model of the nonlinear Schrodinger equation is used to study wavelength-division multiplexed communication over a single polarization. The model explains (a) why constant-composition codes offer an improvement in signal to noise ratio compared with independent and uniform selection of constellation points and (b) why similar gains are obtained using carrier recovery algorithms even without using constant-composition codes.
Submitted to IEEE Journal of Lightwave Technology on March 4, 2022