公开(公告)号：US20040208565A1

公开(公告)日：2004-10-21

申请号：US10014353

申请日：2001-12-14

Applicant: Nortel Networks Limited

Inventor： Kim B. Roberts ,  Wolfgang Oberhammer ,  Maurice S. O'Sullivan ,  Roland A. Smith

IPC: H04J014/02 ,  H04B010/00

CPC classification number: H04B10/2563 ,  H04J14/02

Abstract: A method and system for reducing non-linear signal degradation effects of WDM optical signals exacerbated by highly correlated bit patterns of optical waveforms in neighboring optical channels. Embodiments include offsetting the transmission times of signals in neighboring channels, and applying different scrambling patterns to the respective data streams prior to transmission on neighboring optical channels.

Abstract translation: 一种用于减少WDM光信号的非线性信号劣化效应的方法和系统，其由相邻光信道中的光波形的高度相关位模式加剧。 实施例包括抵消相邻信道中的信号的传输时间，以及在相邻光信道上传输之前将各种数据流应用不同的加扰模式。

公开(公告)号：US20040197103A1

公开(公告)日：2004-10-07

申请号：US10405236

申请日：2003-04-03

Applicant: Nortel Networks Limited

Inventor： Kim B. Roberts ,  Leo Strawczynski ,  Maurice S. O'Sullivan

IPC: H04B010/00

CPC classification number: H04B10/2543

Abstract: Nonlinearity-induced signal distortions are compensated by processing an input communications signal, in the electrical domain prior to Electrical-to-optical conversion and transmission through an optical link of a communications system. According to the invention, a compensation operator is determined that substantially mitigates the nonlinearity-induced signal distortions imparted to an optical signal traversing the communications system. The input communications signal is then input to the compensation operator to generate a predistorted electrical signal. This predistorted electrical signal is then used to modulate an optical source to generate a corresponding predistorted optical signal for transmission through the optical communications system. With this arrangement, arbitrary nonlinearity-induced signal distortions imparted by the optical link can be compensated in such a manner that a comparatively undistorted optical signal is obtained at the receiving end of the optical link.

Abstract translation: 在通过通信系统的光链路的电 - 光转换和传输之前，通过处理电域中的输入通信信号来补偿非线性引起的信号失真。 根据本发明，确定补偿算子，其基本上减轻施加到穿过通信系统的光信号的非线性引起的信号失真。 然后将输入通信信号输入到补偿操作器以产生预失真的电信号。 然后，该预失真的电信号用于调制光源以产生用于通过光通信系统传输的相应的预失真光信号。 通过这种布置，可以以在光链路的接收端获得相对不失真的光信号的方式来补偿由光链路赋予的任意非线性引起的信号失真。