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Signal filtering method and system

A signal filtering and interference signal technology, applied in the field of signal processing, can solve problems such as poor interference filtering effect

Inactive Publication Date: 2016-07-06
GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] Based on this, it is necessary to provide a signal filtering method and system for the problem of poor interference filtering effect in the prior art

Method used

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Embodiment Construction

[0022] Embodiments of the signal filtering method of the present invention will be described below in conjunction with the accompanying drawings.

[0023] figure 1 It is a flow chart of the signal filtering method of the present invention. Such as figure 1 As shown, the signal filtering method may include the following steps:

[0024] S1, delaying the first interference signal generated by the interference source several times, using each delayed signal as an element to construct an output vector of the first interference signal;

[0025] In the following, the ECG signal and the EMG signal are taken as examples for description. When it is necessary to extract pure electrocardiographic signals from electrocardiographic signals mixed with electromyographic signals, the first interference signal is electromyographic signals; correspondingly, electrocardiographic signals are useful signals. In practical situations, the first interfering signal and the useful signal may also be...

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Abstract

The present invention relates to a signal filtering method and system. The method comprises the following steps: delaying, for multiple times, a first interference signal generated by an interference source, and constructing an output vector of the first interference signal by using each delayed signal as an element; determining an antecedent of a fuzzy rule according to the output vector, and performing fuzzy reasoning according to the antecedent and a preset fuzzy rule, to obtain a first consequent of the fuzzy rule; and performing function expansion on the output vector, obtaining an orthogonal basis function of the expanded output vector, determining a second consequent of the fuzzy rule according to the orthogonal basis function, obtaining a corresponding second interference signal according to the first consequent and the second consequent when the first interference signal is transmitted and arrives at a signal source of a useful signal, and obtaining, through filtering according to the second interference signal, the useful signal generated by the signal source. The signal filtering method and system can effectively obtain the interference signal ,so as to extract the useful signal from the useful signal mixed with the interference signal.

Description

technical field [0001] The present invention relates to the technical field of signal processing, in particular to a signal filtering method and system. Background technique [0002] In the process of signal transmission, due to various reasons, interference signals will be generated. The interference signal will have a certain impact on the useful signal, and in severe cases, it may even make the signal unable to be demodulated. Therefore, after receiving the signal, it is often necessary to filter the received signal to remove interference and obtain a useful signal. However, in some scenarios, it is often difficult to completely filter out the interference. Take the ECG signal as an example. Electrocardiograph (ECG) contains a large amount of physiological and even disease information, and is an important tool for clinical diagnosis of cardiovascular diseases. The ECG signals actually collected by patient monitors and multi-sign acquisition equipment are relatively we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/10H04B1/16
CPCH04B1/10H04B1/16
Inventor 胡静
Owner GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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