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

A Method of Correcting the Uncertainty of Independent Component Analysis in Electromagnetic Interference Separation

An independent component and electromagnetic interference technology, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve the uncertainty of the amplitude of the separation electromagnetic interference results, the separation results cannot truly reflect the electromagnetic interference amplitude value, and cannot truly reflect the electromagnetic interference Phase information and other issues to achieve the effect of ensuring accurate quantitative analysis and correction results

Active Publication Date: 2015-08-19
BEIHANG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phase uncertainty refers to the difference in phase between the electromagnetic interference and the original interference after separation, and the separation result cannot truly reflect the phase information of the electromagnetic interference, so the separation result cannot be used for quantitative analysis of the electromagnetic interference test
[0005] 2. There is uncertainty in the magnitude of the separation of electromagnetic interference results
Amplitude uncertainty refers to the difference in amplitude between the electromagnetic interference and the original interference after separation, and the separation result cannot truly reflect the amplitude value of the electromagnetic interference, so the separation result cannot be used for quantitative analysis of the electromagnetic interference test

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
  • A Method of Correcting the Uncertainty of Independent Component Analysis in Electromagnetic Interference Separation
  • A Method of Correcting the Uncertainty of Independent Component Analysis in Electromagnetic Interference Separation
  • A Method of Correcting the Uncertainty of Independent Component Analysis in Electromagnetic Interference Separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0049] In the experiment, a sine signal, an amplitude modulation signal and a frequency modulation signal were randomly mixed by using matlab7.0 software to simulate the actual measurement signal, referred to as the actual measurement signal. The measured signal and the results obtained after using the independent component analysis method are as follows: figure 2 As shown in (A) and (B) in , there are uncertainties in magnitude and phase. The three signal expressions are as follows:

[0050] I 1 =(1+cos(2πf 1 t))cos(2πf 10 t)

[0051] I 2 =cos(2πf 20 t+cos(2πf 2 t))

[0052] I 3 =sin(2πf 20 t)

[0053] where f 1 = 10MHz, f 10 =115MHz, f 2 =12MHz, f 20 =130MHz. t means time.

[0054] Step 1. Phase recovery. The mixed estimate matrix output by independent component analysis is:

[0055] A M × N = 0.4296 ...

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 provides a method for correcting uncertainty of an independent component analytical method in electromagnetic interference separation, wherein the method is used for the field of electromagnetic interference separation. The method includes the steps that the phase position of an independent separation signal matrix is regulated according to mixed estimation of plus or minus characteristics of each row of the matrix, and all actual measurement signals with correlation coefficients of independent separation signals and the maximal actual measurement signal are searched; new independent separation signals FS are obtained through transform domain processing; feature frequency points of the independent separation signals are searched in a certain step length; according to the feature frequency points, the energy proportionality coefficient between current independent separation signals and the maximal actual measurement signal is determined, and the independent separation signals in a new frequency domain are obtained; and Fourier inversion is carried out on the independent separation signals in the new frequency domain, and correction signals are rejected. The method corrects phase positions and amplitude values of the independent electromagnetic interference separation signals based on an independent component analysis, is precise in correction result, and can be used for quantitative analyses of electromagnetic interference tests.

Description

technical field [0001] The invention relates to the field of electromagnetic interference separation, in particular to a method for correcting the uncertainty of an independent component analysis method in electromagnetic interference separation. Background technique [0002] In the electromagnetic compatibility test, according to the national military standard GJB151A-97 "Military Equipment and Subsystem Electromagnetic Emission and Sensitivity Requirements", the electromagnetic compatibility test includes electromagnetic interference (EMI) test, and the electromagnetic interference test includes conducted emission and radiated emission test . The national military standard clearly stipulates the limit value of equipment radiation, that is, the limit value of electromagnetic interference that can be tolerated. In the electromagnetic compatibility test, the signal that can be measured is a mixed signal of multiple electromagnetic interference and background noise. Therefor...

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): G01R31/00
Inventor 潘耀鹏陶志杰戴飞李柏超
Owner BEIHANG 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