Patent ID: 9166703
Filing Date: 2015-10-20
Classification: H04B,H04L

Abstract:
1. An equalizer for processing, in a digital electrical domain, a signal obtained from a path of an optical transmission system, the equalizer disposed in a digital signal processor and comprising a plurality of cascaded stages, where at least two of the plurality of cascaded stages each comprise a cascade of: a linear equalization element; and a non-linear equalization element, the linear equalization element and the non-linear equalization element each comprising adjustable parameters, wherein the digital signal processor is configured to monitor a performance parameter of the equalizer and to control values of the adjustable parameters to optimize the performance parameter, wherein the non-linear equalization element is a non-linear phase rotator, and wherein the linear equalization element compensates for dispersion and the non-linear equalization element compensates for nonlinearity in each of the at least two of the plurality of cascaded stages.