Wavelet transform decomposition for fetal phonocardiogram extraction from composite abdominal signal

Abstract

This paper deals with the extraction of the fetal and maternal component from the composite abdominal phonocardiogram (PCG). The main method used for this task is the discrete wavelet transform. For the initial tests, we used synthetic PCG data incorporating the maternal heart sound interference. Based on the results, we suggested the suitable wavelet and the level of decomposition for fetal and maternal PCG extraction.