FFT averaging of multichannel BCG signals from bed mattress sensor to improve estimation of heart beat interval

Juha M. Kortelainen, Jussi Virkkala

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

16 Citations (Scopus)

Abstract

A multichannel pressure sensing Emfit foil was integrated to a bed mattress for measuring ballistocardiograph signals during sleep. We calculated the heart beat interval with cepstrum method, by applying FFT for short time windows including pair of consequent heart beats. We decreased the variance of FFT by averaging the multichannel data in the frequency domain. Relative error of our method in reference to electrocardiograph RR interval was only 0.35% for 15 night recordings with six normal subjects, when 12% of data was automatically removed due to movement artifacts. Background motivation for this work is given from the studies applying heart rate variability for the sleep staging.

Original languageEnglish
Title of host publication29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
PublisherIEEE Institute of Electrical and Electronic Engineers
Pages6686-6689
Number of pages4
ISBN (Electronic)978-1-4244-0788-0
ISBN (Print)978-1-4244-0787-3
DOIs
Publication statusPublished - 1 Jan 2007
MoE publication typeNot Eligible
Event29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Lyon, France
Duration: 22 Aug 200726 Aug 2007

Conference

Conference29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
CountryFrance
CityLyon
Period22/08/0726/08/07

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  • Cite this

    Kortelainen, J. M., & Virkkala, J. (2007). FFT averaging of multichannel BCG signals from bed mattress sensor to improve estimation of heart beat interval. In 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (pp. 6686-6689). IEEE Institute of Electrical and Electronic Engineers. https://doi.org/10.1109/IEMBS.2007.4353894