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Paper Abstract and Keywords
Presentation 2026-07-16 15:20
Non-Contact Heartbeat Measurement Using Multiple Doppler Sensors During Typing and Speaking
Naoki Torii, Yusuke Yano, Jianqing Wang (NITech), Shinji Uebayashi (Keycom) EMCJ2026-21
Abstract (in Japanese) (See Japanese page) 
(in English) Non-contact heart rate monitoring using Doppler sensors has been actively researched as an unobtrusive vital sign measurement technique. However, since the body surface displacement induced by heartbeats is extremely minute, accurately extracting heartbeats in environments contaminated by noise from daily body movements, such as typing and speaking, remains a significant challenge. To address this issue, this study proposes a novel R-R interval (RRI) estimation algorithm with improved robustness against body movement artifacts. The proposed method establishes a common baseline across three sensors based on past RRI estimates to detect and remove outliers caused by body movement noise. Furthermore, the estimation results from each sensor are integrated, and the optimal RRI is selected by introducing a reliability score that considers the number of calculated RRIs and the number of sensors contributing to the calculation. Evaluation experiments conducted on adult subjects during typing and speaking demonstrated that the RMSE rate was below 10 % in 10 of the 11 measurement cases. These results indicate that the proposed method enables highly accurate non-contact heart rate monitoring even in work environments that require typing or speaking.
Keyword (in Japanese) (See Japanese page) 
(in English) Millimeter Wave Doppler Sensor / Template Matching / Heartbeat Measurement / Optimal value Extraction / / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 114, EMCJ2026-21, pp. 29-34, July 2026.
Paper # EMCJ2026-21 
Date of Issue 2026-07-09 (EMCJ) 
ISSN Online edition: ISSN 2432-6380
Copyright
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reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EMCJ2026-21

Conference Information
Committee EMCJ  
Conference Date 2026-07-16 - 2026-07-16 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMCJ 
Conference Code 2026-07-EMCJ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Non-Contact Heartbeat Measurement Using Multiple Doppler Sensors During Typing and Speaking 
Sub Title (in English)  
Keyword(1) Millimeter Wave Doppler Sensor  
Keyword(2) Template Matching  
Keyword(3) Heartbeat Measurement  
Keyword(4) Optimal value Extraction  
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Keyword(6)  
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1st Author's Name Naoki Torii  
1st Author's Affiliation Nagoya Institute of Technology (NITech)
2nd Author's Name Yusuke Yano  
2nd Author's Affiliation Nagoya Institute of Technology (NITech)
3rd Author's Name Jianqing Wang  
3rd Author's Affiliation Nagoya Institute of Technology (NITech)
4th Author's Name Shinji Uebayashi  
4th Author's Affiliation Keycom Corporation (Keycom)
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Speaker Author-1 
Date Time 2026-07-16 15:20:00 
Presentation Time 25 minutes 
Registration for EMCJ 
Paper # EMCJ2026-21 
Volume (vol) vol.126 
Number (no) no.114 
Page pp.29-34 
#Pages 6 
Date of Issue 2026-07-09 (EMCJ) 

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