Soft separation method of conducted electromagnetic interference noise based on blind signal processing technology

A technology of conducted electromagnetic interference and blind signal processing, which is applied in the direction of measuring electricity, measuring electrical variables, spectrum analysis/Fourier analysis, etc., to achieve the effect of improving separation accuracy, low separation cost and good practicability
CN101799494AInactive Publication Date: 2010-08-11NANJING UNIV OF POSTS & TELECOMM
0 Cites 19 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV OF POSTS & TELECOMM
Publication Date
2010-08-11
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a soft separation method of conducted electromagnetic interference noise based on a blind signal processing technology, belonging to the field of conducted electromagnetic interference noise inhibition. The method comprises the following steps of: carrying out probe frequency spectrum estimation and compensation on two current probes; simultaneously measuring electromagnetic interference noise time domain signals on a live wire and a middle wire of an electronic system by the two current probes and a double-trace oscilloscope; carrying out blind separation on electromagnetic interference noise by utilizing a Fast ICA (Independent Component Analysis) algorithm in a blind signal processing method to obtain a signal source vector estimation value; and finally, judging the property of separation signals based on the maximum cross correlation coefficient of blind separation signals and common mode or differential mode reference signals. The invention overcomes the defects of using a radiofrequency transformer or a power divider to carry out hard separation on common mode noise and differential mode noise, has the advantages of high separation accuracy and favorable practicability, and lowers the cost.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a soft separation method of conductive electromagnetic interference noise based on blind signal processing in electromagnetic compatibility technology, and belongs to the field of suppression of conductive electromagnetic interference noise. Background technique

[0002] As a large number of conducted electromagnetic interference problems continue to appear in reality and have not been well resolved, and electromagnetic compliance testing is enforced in various countries, in order to effectively suppress conducted electromagnetic interference noise, it is very necessary to separate the noise modes of.

[0003] Conducted electromagnetic interference noise includes common-mode noise and differential-mode noise. Since common-mode and differential-mode noise have different mechanisms, it is necessary to adopt different suppression methods and design corresponding filter networks. In the measurement of interference noise, how to re...

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