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

Carrier Frequency Recovery Method and Optical Intradyne Coherent Receiver

A technology of carrier frequency and recovery method, applied in electromagnetic receivers, electromagnetic wave transmission systems, electrical components, etc., can solve complex problems

Active Publication Date: 2016-01-20
HUAWEI TECH CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Completing several complex distortion compensations requires a complex receiver structure

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
  • Carrier Frequency Recovery Method and Optical Intradyne Coherent Receiver
  • Carrier Frequency Recovery Method and Optical Intradyne Coherent Receiver
  • Carrier Frequency Recovery Method and Optical Intradyne Coherent Receiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] The following descriptions are illustrative only and do not limit the invention, practice or use.

[0043]The singular or plural of "one embodiment", "embodiment", "specific embodiment" or similar words used herein indicate that one or more specific functions, structures or characteristics related to the embodiment are included in the present invention In at least one embodiment. Thus, appearances of the phrases "in one embodiment," "in an embodiment," "in a particular embodiment" or similar phrases in various places herein in the singular or plural are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments. A dispersion compensation unit is shown in the drawing as an example of an equalization unit. However, the dispersion compensation unit is just an example, and can be replaced with any dispersion compensation on the optical signal, s...

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

A carrier frequency recovery method in a coherent optical transmission system is provided, wherein at least one equalization of a received signal is performed in the frequency domain, the method includes: performing in the frequency domain of the received signal according to an estimated value of frequency offset Frequency offset compensation; obtain the signal after frequency offset compensation. In addition, a coherent optical receiver is provided, comprising: an equalization unit for at least one optical distortion compensation of a received signal in the frequency domain; a frequency offset compensation unit for performing frequency offset estimation in the Frequency offset compensation is performed in the frequency domain of the received signal to obtain a frequency offset compensation signal. The carrier frequency recovery method and the receiver provided by the invention only need the frequency shift of the signal spectrum, so the calculation complexity can be significantly reduced, thereby speeding up the processing process and saving a lot of resources.

Description

technical field [0001] The present invention relates to signal reception, and more particularly to signal reception for coherent detection in high-speed optical transmission. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0003] With higher performance than direct detection, coherent optical transmission has attracted more and more attention. In intradyne coherent optical transmission, the local oscillator laser at the receiver may not be able to accurately track the laser frequency at the transmitter. So a carrier frequency offset occurs between the two ends. This frequency offset results in an IF envelope on the received signal. This effect should be compensated using digital signal processing (DSP) algorithms in the receiver. [0004] In the prior art (see for example prior art documents [1], [2], [3], [4] and [5]), the solution to compensate the c...

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): H04B10/60H04B10/61
CPCH04B10/60H04B10/6161H04B10/6162H04B10/6164H04B10/65
Inventor 解长松
Owner HUAWEI TECH CO LTD