Key result
A low pass digital filter implemented as a software routine on a minicomputer can emulate a hardware moving window averaging process to enhance fetal electrocardiograms immersed in low frequency noise.
A software-based low pass digital filter can emulate hardware moving window averaging to enhance fetal electrocardiogram signals.
The use of a low pass digital filter limplemented as a software routine upon a minicomputer to enhance repetitive biological signals immersed in low frequency noise is described. The method by which a digital filter can emulate a hardware moving window averaging process is outlined. The results of applying such a filter to the enhancement of the fetal electrocardiogram are presented. The criteria used in setting up the filter are also discussed.
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Marvell et al. (1980) studied Fetal electrocardiogram enhancement. Low pass digital filter implemented as a software routine upon a minicomputer was evaluated on Enhancement of the fetal electrocardiogram. A low pass digital filter implemented as a software routine on a minicomputer can emulate a hardware moving window averaging process to enhance fetal electrocardiograms immersed in low frequency noise.
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