A method for extracting fetal electrocardiogram signal

Abstract

The invention belongs to the technical field of biomedical signal processing, and in particular relates to a fetal electrocardiographic signal extraction method for extracting fetal electrocardiographic signals from mutually aliased maternal-fetal mixed electrocardiographic signals. The invention includes: firstly placing the electrodes of the test equipment on the abdominal wall of the mother, recording the potential difference data caused by the conduction of the electrocardiogram, recording multiple sets of data, and obtaining multiple maternal-fetal mixed electrocardiographic signals; and then constructing the reference signal of the maternal electrocardiographic signal , and then use the reference signal to extract the maternal ECG signal from the maternal-fetal mixed ECG signal; then remove the components related to the extracted maternal ECG signal from the maternal-fetal mixed ECG signal, so as to achieve the extraction of fetal ECG purpose of the signal. The fetal electrocardiographic signal extraction method of the present invention can effectively extract the fetal electrocardiographic signal from the mixed electrocardiographic signal of the mother and the fetus. The method has the advantages of small amount of calculation, low complexity, little dependence on parameters, and clear extracted signal, which achieves the expected purpose.

Description

technical field [0001] The invention belongs to the technical field of biomedical signal processing, and in particular relates to a fetal electrocardiographic signal extraction method for extracting fetal electrocardiographic signals from mutually aliased maternal-fetal mixed electrocardiographic signals. Background technique [0002] Fetal ECG signal is an important objective indicator for the study of fetal heart physiological activity, which reflects the growth and health status of the fetus in the mother's body. Therefore, separating or extracting clear fetal ECG signals has become a very meaningful work. [0003] Some current methods focus on the extraction of fetal ECG signals by using blind source separation. The existing methods mainly use the prior information of the fetal ECG signal to construct the corresponding reference signal, and then use the blind source separation algorithm based on gradient or negentropy to separate and extract the fetal ECG signal. This t...

AI Technical Summary

Problems solved by technology

This type of method can get a good separation effect when the reference signal is selected properly. However, the fetal ECG signal is weaker than the maternal ECG signal, so it is difficult to obtain an appropriate reference signal for the fetal ECG signal.

At the same time, when using the blind source separation algorithm, repeated iterations are required, and appropriate parameters need to be selected, otherwise the extraction effect will be affected

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