Supercharge Your Innovation With Domain-Expert AI Agents!

Method and apparatus for control of DPSK and DQPSK receivers and transmitters

A transmitter and receiver technology, applied in instruments, electrical components, optics, etc., to solve complex transmitter and receiver problems

Inactive Publication Date: 2008-10-29
名坛若公司
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] DPSK and DQPSK modulation formats require fairly complex transmitters and receivers

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
  • Method and apparatus for control of DPSK and DQPSK receivers and transmitters
  • Method and apparatus for control of DPSK and DQPSK receivers and transmitters
  • Method and apparatus for control of DPSK and DQPSK receivers and transmitters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] This application refers to US Provisional Application No. 60 / 710749, filed on August 24, 2005.

[0042] Referring now to FIG. 4, an illustration of an optical transmitter having a pulse modulator 36 and a data modulator 38 is shown. Optical feedback signal 39 provides control information to modulator controller 42 . The modulator controller 42 provides three control signals for generating the modulated optical signal. Pulse bias control signal 44 provides bias control to pulse modulator 36 , data bias control signal 46 provides bias control to data modulator 38 and phase control signal 48 provides phase control for phase shifter 50 .

[0043] Typically, modulator controller 42 monitors the output optical power in optical feedback 39 and maintains desired values ​​for data bias signal 46 , pulse bias signal 44 and phase control signal 48 . The modulator controller 42 uses a series of high frequency jitters to set the bias signals 44 and 46 and the phase control signal ...

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 optical communication device such as a transmitter or receiver has a control loop for controlling relative phase of two related optical signals based on signal peak intensity. An optical transmitter measures the signal peak intensity of a combined optical signal representing two data channels to adjust relative phase as desired. An optical receiver measures the signal peak intensity of combined electrical signals, single electrical signals or single optical signals to adjust relative phase as desired. Signal peak intensity is minimized or maximized by adjusting the relative phase, depending upon the modulation configuration used. The feedback control provides a consistent and robust control to stabilize the optical communication device in the presence of variables such as temperature changes, aging and manufacturing tolerances.

Description

technical field [0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims the benefit of US Provisional Application No. 60 / 710749, filed on August 24, 2005. Statement Regarding Federally Funded Research or R&D [0003] (Not applicable) Background technique [0004] Differential Phase Shift Keying (DPSK, also known as Differential Binary Phase Shift Keying DBPSK) and Differential Quadrature Phase Shift Keying (DQPSK) are very attractive modulation formats for optical data transmission. When used with a balanced direct sounding receiver, DPSK is about 3dB more sensitive than conventional on-off keyed receivers. Using the DPSK modulation format, dense wavelength division multiplexing (DWDM) transmissions up to 10,000km have been demonstrated at 40Gbit / s. The symbol rate of DQPSK is half the data rate. For example, for a data rate of 43Gb / s, a rate of 21.5 gigasymbols / second is used. Therefore, DQPSK has narrower spectral line bandwidths, larger dispe...

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): H04B1/02
CPCH04B10/5561H04B10/677H04B10/50577H04B10/5053G02F1/2255H04B10/5051G02F1/0123H04B10/50575
Inventor P·马梅舍夫
Owner 名坛若公司
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