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

Pre-coding-free vector millimeter wave signal generation system based on optical carrier suppression

A signal generation and vector signal technology, applied in electromagnetic wave transmission systems, transmission systems, electromagnetic transmitters, etc., can solve the problems of reduced system signal transmission performance, phase disorder, uneven constellation distribution, etc.

Inactive Publication Date: 2020-10-13
光创新电(苏州)信息科技有限公司
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the same time, although precoding can solve the problem of phase disorder or amplitude mismatch of received signals, the application of precoding technology makes the distribution of constellation diagrams in the system uneven. This technology reduces the minimum Euclidean distance between constellation points, not only increases It increases the complexity and instability of the system, and reduces the signal transmission performance of the system

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
  • Pre-coding-free vector millimeter wave signal generation system based on optical carrier suppression
  • Pre-coding-free vector millimeter wave signal generation system based on optical carrier suppression
  • Pre-coding-free vector millimeter wave signal generation system based on optical carrier suppression

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] combined with figure 1 , a vector millimeter-wave signal generation system based on optical carrier suppression without precoding,

[0026] Using external cavity laser 1 to generate laser to generate continuous wave;

[0027] Use MATLAB software programming to generate (3,1) vector signals in the digital domain, and use pseudo-random binary sequences to map to (3,1) vector signals

[0028] The number is sent to the waveform generator by two channels of I and Q;

[0029] The generated (3,1) signal is up-converted to an intermediate frequency signal, and mixed with two sinusoidal signals with a phase difference of 90 degrees to form a drive light intensity modulator

[0030] the required signal;

[0031] The interleaver 3 and the photodetector 4 are used to filter and convert the generated carrier signal to generate a quadruple frequency (3,1) vector...

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 invention discloses a pre-coding-free vector millimeter wave signal generation system based on optical carrier suppression. An external cavity laser is used for generating laser to generate continuous waves; MATLAB software programming is used for generating (3, 1) vector signals in a digital domain, a pseudo-random two-level system sequence is used for mapping the (3, 1) vector signals, and the (3, 1) vector signals are sent to a waveform generator through an I path and a Q path; the generated (3, 1) signal is up-converted into an intermediate frequency signal, and the intermediate frequency signal is mixed with two sinusoidal signals with a phase difference of 90 degrees to form a signal required for driving the light intensity modulation modulator; and the generated carrier signal is filtered and converted by using an interleaver and a photoelectric detector to generate a quadruplicated frequency (3, 1) vector millimeter wave signal. Compared with the prior art, the system has the advantage that phase precoding is not needed.

Description

technical field [0001] The present invention relates to the technical field of optical fiber-wireless (Radio-over-Fiber, ROF) communication systems, in particular to a vector millimeter-wave signal generation system based on optical carrier suppression without precoding. Background technique [0002] With the continuous advancement of communication technology, users and enterprises have an increasing demand for high-speed, low-loss wireless communication equipment. Therefore, integrating the advantages of optical fiber transmission with low loss, high broadband, anti-electromagnetic Radio-of-Flight (ROF) communication systems are also increasingly used. Many studies have shown that external modulation is an effective modulation method to reduce fiber dispersion and extend transmission distance. Therefore, a stable RF carrier can be provided using an external modulator. In addition, the ROF system combined with Optical Carrier Suppression (OCS) can not only improve bandwidt...

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
IPC IPC(8): H04B10/50H04B10/54H04B10/69
CPCH04B10/506H04B10/54H04B10/691
Inventor 余建军余思遥陈丽辉
Owner 光创新电(苏州)信息科技有限公司
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