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Paper Abstract and Keywords
Presentation 2025-03-14 14:05
An Improvement Study on Frequently-occurred Large Errors with Mode Values for Non-contact Vital Signs Sensing based on mm-Wave Radar
Sora Nagayama, Tatsunori Saito (Nihon Univ.), Yaokun Hu (Fujitsu Ltd.), Takeshi Toda (Nihon Univ.) MICT2024-66
Abstract (in Japanese) (See Japanese page) 
(in English) We have found that relatively long time measurements using millimeter-wave band frequency-modulated continuous wave (FMCW) have resulted in long-lasting estimation errors in some subjects due to the effects of bursty disturbances. Therefore, we reduced the effect of such bursty outliers from the original heart rate by replacing them with a moving average of the mode of the historical data, and found that the root-mean-square error (RMSE) of the heart rate estimation results for the five subjects improved significantly, from approximately 3.2 to 8.1 bpm. However, one subject who had a high frequency of outliers did not show significant improvement in accuracy compared to the other subjects. In this study, we compared the previous method with the proposed method of selecting the mode of the past data by referring to the distribution of estimated heartbeats and replacing the mode with a moving average of the mode. The results showed that subjects who did not show any improvement in the previous study showed a maximum improvement of 3.09 bpm when data from the previous 3 minutes were used.
Keyword (in Japanese) (See Japanese page) 
(in English) ICEEMDAN / FMCW Radar / Heart Rate / Vital Sign / Healthcare / mm-Wave Radar / Radar Signal Processing /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 437, MICT2024-66, pp. 22-27, March 2025.
Paper # MICT2024-66 
Date of Issue 2025-03-07 (MICT) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
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 MICT2024-66

Conference Information
Committee EMCJ MICT  
Conference Date 2025-03-14 - 2025-03-14 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MICT 
Conference Code 2025-03-EMCJ-MICT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) An Improvement Study on Frequently-occurred Large Errors with Mode Values for Non-contact Vital Signs Sensing based on mm-Wave Radar 
Sub Title (in English)  
Keyword(1) ICEEMDAN  
Keyword(2) FMCW Radar  
Keyword(3) Heart Rate  
Keyword(4) Vital Sign  
Keyword(5) Healthcare  
Keyword(6) mm-Wave Radar  
Keyword(7) Radar Signal Processing  
Keyword(8)  
1st Author's Name Sora Nagayama  
1st Author's Affiliation Nihon University (Nihon Univ.)
2nd Author's Name Tatsunori Saito  
2nd Author's Affiliation Nihon University (Nihon Univ.)
3rd Author's Name Yaokun Hu  
3rd Author's Affiliation Fujitsu Limited. (Fujitsu Ltd.)
4th Author's Name Takeshi Toda  
4th Author's Affiliation Nihon University (Nihon Univ.)
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Speaker Author-1 
Date Time 2025-03-14 14:05:00 
Presentation Time 20 minutes 
Registration for MICT 
Paper # MICT2024-66 
Volume (vol) vol.124 
Number (no) no.437 
Page pp.22-27 
#Pages 6 
Date of Issue 2025-03-07 (MICT) 

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