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Paper Abstract and Keywords
Presentation 2023-09-28 11:35
Experimental Evaluation of Frequency Characteristics of Heartbeat Detection Accuracy in Microwave Biosensor
Naoki Sawada, Naoki Honma, Kentaro Murata, Koichiro Kobayashi, Morio Iwai (Iwate Univ.) AP2023-80
Abstract (in Japanese) (See Japanese page) 
(in English) In recent years, studies on heart rate detection radars have been conducted to realize non-contact vital sign sensing. However, none of the existing studies have experimentally evaluated the frequency dependence of heart rate detection accuracy under fair conditions from low microwave to millimeter wave. Therefore, this paper investigates and studies the effects of the radio frequency on the accuracy of heart rate detection. Specifically, this paper describes the quantitative evaluation results of the accuracy of heart rate detection during resting breathing in a wide range of frequency bands from 2 GHz to 40 GHz. In addition, two demodulation methods are used in heart rate detection. Two different demodulation methods are used to avoid the bias in heart rate detection accuracy due to the algorithms across a wide range of frequencies so that the characteristics of the demodulation method do not affect the final evaluation. The experiment results showed that both demodulation methods have similar heart rate errors in most subjects, with no significant degradation differences over the tested frequencies. In other words, no frequency dependence in the accuracy of heart rate detection was observed in the frequency range from 2 GHz to 40 GHz.
Keyword (in Japanese) (See Japanese page) 
(in English) heart rate / radar / microwave / millimeter-wave / / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 194, AP2023-80, pp. 10-15, Sept. 2023.
Paper # AP2023-80 
Date of Issue 2023-09-21 (AP) 
ISSN Online edition: ISSN 2432-6380
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 AP2023-80

Conference Information
Committee MW AP  
Conference Date 2023-09-28 - 2023-09-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Kochi Castle Museum of History 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave, Millimeter wave 
Paper Information
Registration To AP 
Conference Code 2023-09-MW-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Experimental Evaluation of Frequency Characteristics of Heartbeat Detection Accuracy in Microwave Biosensor 
Sub Title (in English)  
Keyword(1) heart rate  
Keyword(2) radar  
Keyword(3) microwave  
Keyword(4) millimeter-wave  
1st Author's Name Naoki Sawada  
1st Author's Affiliation Iwate University (Iwate Univ.)
2nd Author's Name Naoki Honma  
2nd Author's Affiliation Iwate University (Iwate Univ.)
3rd Author's Name Kentaro Murata  
3rd Author's Affiliation Iwate University (Iwate Univ.)
4th Author's Name Koichiro Kobayashi  
4th Author's Affiliation Iwate University (Iwate Univ.)
5th Author's Name Morio Iwai  
5th Author's Affiliation Iwate University (Iwate Univ.)
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Speaker Author-1 
Date Time 2023-09-28 11:35:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2023-80 
Volume (vol) vol.123 
Number (no) no.194 
Page pp.10-15 
Date of Issue 2023-09-21 (AP) 

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