Unlock instant, AI-driven research and patent intelligence for your innovation.

Compensation device and method for nonlinear impairment between channels

A technology of nonlinear damage and compensation device, applied in the field of communication, can solve the problems of compensation performance degradation and performance degradation, and achieve the effect of improving performance

Active Publication Date: 2017-10-31
FUJITSU LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compensation performance of this method degrades significantly when the step length increases to one fiber span
However, the usual link is based on the traditional single-mode fiber, and its dispersion coefficient is more than 4 times the assumed condition of the method. At this time, when the step size is equal to the span length, the performance of the method will be further degraded

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Compensation device and method for nonlinear impairment between channels
  • Compensation device and method for nonlinear impairment between channels
  • Compensation device and method for nonlinear impairment between channels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] figure 1 It is a schematic structural diagram of a compensation device for inter-channel nonlinear impairment according to Embodiment 1 of the present invention, which is used at a receiving end of a communication system. Such as figure 1 As shown, the device 100 includes an iterative parameter determination unit 101, an estimation unit 102, and a first compensation unit 103, wherein,

[0029] The iterative parameter determination unit 101 is used to determine the iterative step size for performing mutual phase modulation damage compensation for each channel in the multi-channel optical fiber transmission link;

[0030] The estimation unit 102 is used to divide the optical fiber transmission link in each iteration step of each channel into one or more optical fiber segments, and perform mutual positioning at the position where the nonlinear damage in each optical fiber segment is the largest modulation impairment estimation;

[0031] The first compensation unit 103 i...

Embodiment 2

[0039] figure 2 It is a schematic structural diagram of a compensation device for inter-channel nonlinear impairment according to Embodiment 2 of the present invention, which is used at a receiving end of a communication system. Such as figure 2 As shown, the device 200 includes an iterative parameter determination unit 201, an estimation unit 202, and a first compensation unit 203, wherein,

[0040] The iterative parameter determination unit 201 is used to determine the iterative step size for performing mutual phase modulation damage compensation for each channel in the multi-channel optical fiber transmission link;

[0041] The estimation unit 202 is used to divide the optical fiber transmission link in each iteration step of each channel into one or more optical fiber segments, and perform mutual positioning at the position where the nonlinear damage in each optical fiber segment is the largest modulation impairment estimation;

[0042] The first compensating unit 203...

Embodiment 3

[0103] Figure 7 It is a schematic structural diagram of a compensation device for inter-channel nonlinear impairment according to Embodiment 3 of the present invention, which is used at a receiving end of a communication system. The device 700 includes an iterative parameter determination unit 701, an estimation unit 702, and a first compensation unit 703, wherein,

[0104] The iterative parameter determination unit 701 is used to determine the iterative step size for each channel in the multi-channel optical fiber transmission link to perform mutual phase modulation damage compensation;

[0105] The estimation unit 702 is used to divide the optical fiber transmission link in each iteration step of each channel into one or more optical fiber segments, and, according to the interphase modulation damage caused by the channel within a predetermined distance from the current channel, in The location of the largest nonlinear damage in each fiber segment is used for phase modulati...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An embodiment of the present invention provides a compensation device and method for non-linear damage between channels, the device includes: an iterative parameter determination unit, used to determine the iterative step for each channel to perform mutual phase modulation damage compensation in a multi-channel optical fiber transmission link Long; the estimation unit is used to divide the optical fiber transmission link in each iteration step of each channel into one or more optical fiber segments, and perform the calculation at the position where the nonlinear damage in each optical fiber segment is the largest Interphase modulation impairment estimation; the first compensation unit is configured to perform interphase modulation impairment compensation according to the interphase modulation impairment estimation result. By estimating the interphase modulation impairment at the position where the nonlinear impairment is the largest in each fiber segment, the interphase modulation impairment can be effectively compensated and the performance of the communication system can be improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a compensation device and method for inter-channel nonlinear impairment in a communication system. Background technique [0002] Currently, a Wavelength Division Multiplexing (WDM) system is widely used in communications. Due to the large number of channels in the wavelength division multiplexing system, the nonlinear damage between channels is more obvious, so it is necessary to estimate and compensate the nonlinear damage between channels. [0003] Since the nonlinear Schrödinger equation can well model the nonlinear effect in the optical fiber, in principle, the optical coherent detection receiver based on digital signal processing and the construction of the reverse link can compensate the nonlinearity in the optical fiber transmission link Impairment, where the attenuation coefficient, dispersion coefficient and nonlinear coefficient of the link are opposite to those of the transm...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/2543
CPCH04B10/2557H04B10/0795
Inventor 樊洋洋窦亮陶振宁
Owner FUJITSU LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com