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      Applicability of adaptive noise cancellation to fetal heart rate detection using photoplethysmography

      , Article Computers in Biology and Medicine ; Volume 38, Issue 1 , 2008 , Pages 31-41 ; 00104825 (ISSN) Zahedi, E ; Beng, G. K ; Sharif University of Technology
      2008
      Abstract
      In this paper, an approach based on adaptive noise cancellation (ANC) is evaluated for extraction of the fetal heart rate using photoplethysmographic signals from the maternal abdomen. A simple optical model is proposed in which the maternal and fetal blood pulsations result in emulated signals where the lower SNR limit (fetal to maternal) is - 25 dB. It is shown that a recursive least-squares algorithm is capable of extracting the peaks of the fetal PPG from these signals, for typical values of maternal and fetal tissues. © 2007 Elsevier Ltd. All rights reserved  
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