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

Method for recovering signals and frequencies in phase-sensitive OTDR sensing by random single pulse sampling

A phase-sensitive, signal-recovery technology, applied in transmission systems, electromagnetic wave transmission systems, electrical components, etc., can solve problems such as improvement and long signal processing process

Active Publication Date: 2019-06-28
SHANDONG UNIV
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the signal frequency increases, when the signal frequency reaches several thousand Hz, using the traditional Nyquist sampling law often makes the signal processing process longer, and at the same time, the hardware and software facilities that process the signal response greatly increased the requirements

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 for recovering signals and frequencies in phase-sensitive OTDR sensing by random single pulse sampling
  • Method for recovering signals and frequencies in phase-sensitive OTDR sensing by random single pulse sampling
  • Method for recovering signals and frequencies in phase-sensitive OTDR sensing by random single pulse sampling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A method of random single-pulse sampling to recover signal and frequency in phase-sensitive OTDR sensing, such as figure 1 As shown, it is used for signal reconstruction and frequency recovery in phase-sensitive OTDR, including the following steps:

[0060] (1) Determine the observation matrix Φ corresponding to the sinusoidal signal required for the experiment;

[0061] (2) Determine the observation vector y corresponding to the observation matrix Φ;

[0062] (3) Utilize the discrete Fourier transform matrix to obtain the sparse matrix Ψ of the signal;

[0063] (4) Use the orthogonal matching pursuit algorithm OMP to perform signal reconstruction and frequency recovery;

[0064] (5) Transform the signal from the time domain to the frequency domain through Fourier transform, and then obtain the signal and frequency.

[0065] The phase-sensitive OTDR device used in the present invention is as figure 2 As shown, the phase-sensitive OTDR device includes a laser, an op...

Embodiment 2

[0068] According to a kind of random monopulse sampling described in embodiment 1, the method for recovering signal and frequency in phase-sensitive OTDR sensing, its difference is:

[0069] Step (1), determine the observation matrix Φ corresponding to the sinusoidal signal required in the experiment, including the following steps:

[0070] A, simulate the analog signal of any frequency by Matlab software, set the length of the analog signal to be N, the length of the analog signal is the same as the length of the disturbance signal in the experiment;

[0071] B. Use a random monopulse sequence to perform analog sampling on the analog signal, that is, randomly collect points at non-equal intervals on the analog signal simulated in step A; this process of non-equally spaced random sampling is called a random monopulse sampling process. The stochastic monopulse process involves sampling a signal by using a generated random monopulse sequence.

[0072] C. Known according to A in...

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 relates to a method for recovering signals and frequencies in phase-sensitive OTDR sensing by random monopulse sampling, which is used for signal reconstruction and frequency recovery inphase-sensitive OTDR and comprises the following steps of: (1) determining an observation matrix corresponding to sine signals required in an experiment; (2) determining an observation vector y corresponding to the observation matrix; (3) obtaining a sparse matrix of the signal by using the discrete Fourier transform matrix; (4) carrying out signal reconstruction and frequency recovery on the signal by using an orthogonal matching pursuit algorithm OMP; and (5) transforming the time domain of the signal into the frequency domain through Fourier transform, thereby obtaining the signal and thefrequency. According to the invention, the high-frequency signal can be recovered at a relatively low sampling frequency, so that the sampling and calculating cost of the adopted sensor is greatly reduced.

Description

technical field [0001] The invention relates to a method for recovering signals and frequencies in phase-sensitive OTDR sensing by random single-pulse sampling that breaks through the Nyquist sampling theorem, and belongs to the technical field of optical fiber sensing and detection. Background technique [0002] As we all know, the Nyquist sampling theorem (sampling theorem) is the rule followed when sampling. When processing traditional signals based on the Nyquist sampling theorem, if the sampling signal is to be reconstructed, the required sampling rate must be At least twice the signal bandwidth or even higher. At present, this theory governs the acquisition, processing, storage, transmission, etc. of all images and signals. In a phase-sensitive OTDR (Optical Time Domain Reflectometer), if we want to reconstruct the signal and obtain the frequency of the signal, the sampling frequency usually required is much higher than the frequency of the signal. Therefore, as the ...

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): H04B10/071
Inventor 秦增光刘兆军丛振华渠帅
Owner SHANDONG UNIV
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