Fetal electrocardiogram extraction method and device fusing wavelet and fastICA

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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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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