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Fetal electrocardiogram extraction method and device fusing wavelet and fastICA

A technology of fetal ECG and extraction method, which is applied in the field of signal processing, can solve the problems of low precision and interference of fetal ECG separation, achieve the effect of no time limit, reduce the degree of overlap, and non-invasive extraction process

Inactive Publication Date: 2018-12-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
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Problems solved by technology

[0008] The purpose of the present invention is to disclose a combination of wavelet decomposition with peak maximization and fastICA in view of the technical problems that the maternal ECG and fetal ECG overlap are too high, resulting in low separation accuracy of fetal ECG and being interfered by the mother's ECG. Fetal ECG Extraction Method

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  • Fetal electrocardiogram extraction method and device fusing wavelet and fastICA

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[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the implementation methods and accompanying drawings.

[0027] When collecting fetal ECG signals, the acquisition device is obtained by directly acting on the mother's abdomen, and the mother's abdominal signal includes the electrocardiogram signal (MECG+FECG) of the mother and the fetus, so the present invention first mixes the abdominal signal (MECG+FECG) Carry out whitening and de-averaging, and then use the maximum peak value to determine the wavelet packet decomposition point, so as to reduce the overlapping degree of mixed signals. When the overlap between maternal ECG and fetal ECG is too high, this method can effectively suppress the interference of maternal ECG and noise; then use fastICA based on negative entropy to separate mixed ECG signals to obtain fetal signals containing noise...

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Abstract

The invention belongs to the technical field of signal processing, and discloses a fetal electrocardiogram extraction method and device fusing wavelet and fastICA, for solving the technical problem that the degree of overlapping for the electrocardiogram of a mother and the fetal electrocardiogram is too high so as to cause low fetal electrocardiogram separation accuracy and be interfered by the electrocardiogram of the mother. The fetal electrocardiogram extraction method fusing wavelet and fastICA firstly performs whitening and mean-value-removing on mixed abdominal signals, and then determines the wavelet packet decomposition point by means of the peak maximum, thus reducing the degree of overlapping of the mixed signals; when degree of overlapping for the electrocardiogram of the mother and the fetal electrocardiogram is too high, the fetal electrocardiogram extraction method fusing wavelet and fastICA can effectively inhibit the interference from the electrocardiogram of the mother and the noise; and then the mixed electrocardiogram signals are separated by means of the fastICA based on negative entropy to obtain a fetal signal with noise, and finally using wavelet denoising to remove the noise and baseline drift in the signal. The fetal electrocardiogram extraction method fusing wavelet and fastICA is used for perinatal medicine, and the fetal electrocardiogram extractedby the fetal electrocardiogram extraction method fusing wavelet and fastICA is clearer than a fetal electrocardiogram based on kurtosis, and has better convergence.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a fetal electrocardiogram extraction scheme combined with wavelet decomposition and fast independent component analysis. Background technique [0002] In recent years, with the rapid development of perinatal medicine, improving the quality of fetal birth and reducing the morbidity and mortality of perinatal infants is an important content of maternal and child health care, so it is necessary to monitor the fetus during the perinatal period. At present, the clinical monitoring of the fetus mainly includes: fetal heart sound monitoring, cardiac monitoring and ECG monitoring. Their functions are all through monitoring the fetal heart activity during pregnancy, early detection of abnormal conditions in the process of fetal growth and development, and timely taking medical measures. remedy. [0003] Fetal Electrocardiogram (FECG) is the most originating signal o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0444A61B5/344
CPCA61B5/7203A61B5/7225A61B2503/04A61B5/344
Inventor 黄艺格贺知明曾浩华吕文娟刘妙玲
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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