Heartbeat detection by using Doppler radar with wavelet transform based on scale factor learning

Shoichiro Tomii, Tomoaki Ohtsuki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Citations (Scopus)

Abstract

In this paper, we focus on the scale factor in the wavelet transform. When we observe the time series of wavelet coefficients on each scale factor, the wavelet coefficients are affected by the respiration or the body motion on some scale factors. On the other hand, on some scale factor, the wavelet coefficients increase only when the heartbeats appear. We search the scale factor whose wavelet coefficients increase only when the heartbeats appear, in advance. In the learning phase, the subject sits still without body motion. We avoid using a pseudo frequency to obtain the heart rate. Instead, we use the time interval of each peak on the wavelet coefficients whose scale factor is decided in the learning phase. Thus, although the subject has body motion, the heartbeats are able to be detected. For the evaluation, four types of activities are tested. The R-R interval is used for the evaluation of heartbeat detection. As a result, we confirm that RMSE of the R-R interval reduced on all activities compared to the conventional method. Moreover, the RMSE of the R-R interval did not deteriorate when the distance between the Doppler radar and the subject becomes long.

Original languageEnglish
Title of host publicationIEEE International Conference on Communications
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages483-488
Number of pages6
Volume2015-September
ISBN (Print)9781467364324
DOIs
Publication statusPublished - 2015 Sep 9
EventIEEE International Conference on Communications, ICC 2015 - London, United Kingdom
Duration: 2015 Jun 82015 Jun 12

Other

OtherIEEE International Conference on Communications, ICC 2015
CountryUnited Kingdom
CityLondon
Period15/6/815/6/12

    Fingerprint

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

Cite this

Tomii, S., & Ohtsuki, T. (2015). Heartbeat detection by using Doppler radar with wavelet transform based on scale factor learning. In IEEE International Conference on Communications (Vol. 2015-September, pp. 483-488). [7248368] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICC.2015.7248368