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

    21 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
    Country/TerritoryFrance
    CityLyon
    Period22/08/0726/08/07

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