Heartbeat detection with Doppler radar based on spectrogram

Eriko Mogi, Tomoaki Ohtsuki

研究成果: Conference contribution

25 被引用数 (Scopus)

抄録

A variability of R-R intervals that represent the peak-to-peak intervals of the heartbeats indicates the mental condition. Doppler radar can capture the information of heartbeats with less burden on subjects, which leads to less stress of subjects. However, non-contact heartbeat detection using Doppler radar is easily affected by respiration and body movements. In this paper, we propose a detection algorithm of R-R intervals based on the spectrogram. Our algorithm determines the frequency bands containing the heartbeats components from the frequencies that might respond to heartbeats in the spectrogram. We integrate the amplitudes of frequencies due to heartbeats within the frequency band to eliminate the noise caused by respiration and small body movements. Then, we detect peaks in the integrated amplitudes of frequencies corresponding to heartbeats. In general, the R-R intervals do not largely change between two adjacent intervals. Thus, we set a threshold to the difference of two adjacent peak-to-peak intervals that are detected. If the peak-to-peak interval is judged not corresponding to an R-R interval by the threshold, we remove the corresponding peak and interpolate a peak based on the adjacent peak-to-peak intervals. Through experiments, we show that when the subjects were sitting still, our algorithm improved the detection accuracy of the R-R intervals compared with our previous algorithm that was able to achieve a better detection accuracy than the other existing algorithms. Moreover, we confirmed that the improvement of the detection accuracy is effective to accurately calculate the stress index.

本文言語English
ホスト出版物のタイトル2017 IEEE International Conference on Communications, ICC 2017
出版社Institute of Electrical and Electronics Engineers Inc.
ISBN(電子版)9781467389990
DOI
出版ステータスPublished - 2017 7月 28
イベント2017 IEEE International Conference on Communications, ICC 2017 - Paris, France
継続期間: 2017 5月 212017 5月 25

Other

Other2017 IEEE International Conference on Communications, ICC 2017
国/地域France
CityParis
Period17/5/2117/5/25

ASJC Scopus subject areas

  • コンピュータ ネットワークおよび通信
  • 電子工学および電気工学

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