Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Polarization state tracking recovery method and device and optical receiver

A technology of tracking recovery and optical receiver, which is applied in the field of communication and can solve problems such as inability to compensate PMD

Pending Publication Date: 2022-06-21
FUJITSU LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method is based on 1-tap compensation and cannot compensate PMD

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
  • Polarization state tracking recovery method and device and optical receiver
  • Polarization state tracking recovery method and device and optical receiver
  • Polarization state tracking recovery method and device and optical receiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] In the embodiments of the present invention, the terms "first", "second", etc. are used to distinguish different elements in terms of appellation, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be used by these terms restricted. The term "and / or" includes any and all combinations of one or more of the associated listed items. The terms "comprising", "including", "having", etc. refer to the presence of stated features, elements, elements or components, but do not preclude the presence or addition of one or more other features, elements, elements or components.

[0028] In the embodiments of the present invention, the singular forms "a", "the", etc. include plural forms, and should be broadly understood as "a" or "a class" rather than being limited to the meaning of "an"; in addition, the term "the" "" is understood to include both the singular and the plural, unless the context clearly dictates otherwise. ...

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

The embodiment of the invention provides a polarization state tracking recovery method, a polarization state tracking recovery device and an optical receiver. The polarization state tracking recovery device at least comprises a first determination unit used for determining a polarization demultiplexing coefficient according to a first signal, the first signal being an equalizer output signal obtained after a dual polarization multiplexing input signal at a current sampling moment is input into an adaptive equalizer; the second determining unit is used for determining a dual-polarization demultiplexing output signal according to the first signal and the polarization demultiplexing coefficient; and the updating unit is used for updating the coefficient of the adaptive equalizer according to the dual-polarization demultiplexing output signal, a dual-polarization multiplexing input signal corresponding to the dual-polarization demultiplexing output signal and the polarization demultiplexing coefficient.

Description

technical field [0001] The present invention relates to the field of communication technology. Background technique [0002] In the optical fiber communication system based on bipolarization modulation, birefringence in the optical fiber causes polarization mode dispersion (PMD) of the received optical signal and the change of the polarization axis. In general, the polarization axis of the received signal is constant or changes slowly with time, for example, the rate of change is within a few kilohertz. Usually, an adaptive equalizer (AEQ) based on a constant modulus algorithm (CMA) or a least mean square (LMS) algorithm can be used to track the state of polarization (SOP) to perform polarization demultiplexing and PMD compensation at the same time. However, the polarization state tracking capability of conventional AEQs cannot cope with the rapid changes in SOP in some extreme cases, such as the megahertz-scale SOP rotation caused by lightning strikes. Currently, a Stokes...

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 Applications(China)
IPC IPC(8): H04B10/2569H04B10/61
CPCH04B10/2569H04B10/6162
Inventor 樊洋洋陶振宁
Owner FUJITSU LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com