Extraction of temporally correlated sources with its application to non-invasive fetal electrocardiogram extraction

This letter addresses the problem of fetal electrocardiogram (FECG) extraction. A class of source extraction algorithms is proposed, which uses a combination of two different approaches: Barros’s source extraction approach and Hyvärinen’s fixedpoint approach. The proposed algorithms can rapidly extract the desired FECG with little noise, and can work well in some bad situations. The validity and performance of the algorithms are confirmed by extensive computer simulations and experiments on real-world data.