Patent ID: 9225455
Filing Date: 2015-12-29
Classification: H04B,H04J

Abstract:
1. An optical signal processing method, comprising: receiving, at a receiver, an optical signal transmitted from a source over a transmission medium having a length L, the optical signal comprising a plurality of wavelength division multiplexed (WDM) optical channels; processing the optical signal to jointly compensate non-linear distortions in the plurality of WDM optical channels using an iterative digital back propagation (DBP) algorithm by dividing the length L into N steps, where N is an integer and wherein operation of the DBP algorithm at each step is controlled by a corresponding step size of the step; and selecting step sizes of N steps as a function of a distance from the source such that: for a first set of contiguous steps starting from the receiver and extending towards the source, selected step sizes have values greater than L/N and less than values from logarithmic step size assignments, and for remaining steps not in the first set, selected step sizes have values smaller than L/N and greater than values from logarithmic step size assignments.