Patent ID: 8447191
Filing Date: 2013-05-21
Classification: H04B,H04J

Abstract:
1. A method of compensating for transmission impairment, the method comprising: receiving a wavelength-division multiplexed optical signal which has been distorted in the physical domain by an optical transmission channel, wherein the optical transmission channel includes an optical fiber and an optical amplifier; and propagating the distorted optical signal backward in the electronic domain in a corresponding virtual optical transmission channel to fully compensate for fiber dispersion, self-phase modulation, and cross-phase modulation (XPM) and to partially compensate for four-wave mixing (FWM), the virtual optical transmission channel includes a virtual optical fiber, the method further comprising modeling the virtual optical fiber according to an enhanced coupled non-linear Schrödinger equation (EC-NLSE) using dispersion, loss and nonlinearity parameters which are opposite in value to the corresponding optical fiber parameters, to account for dispersion, intra-channel, and at least some inter-channel impairments.