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Paper Abstract and Keywords
Presentation 2026-09-10 13:40
[Invited Lecture] Characteristics of High-Sensitivity Wi-Fi Sensing Exploiting Low-Multipath Environments
Toshinori Suzuki, Yu Morishima (Tohoku Gakuin Univ.) AP2026-94
Abstract (in Japanese) (See Japanese page) 
(in English) Motion-induced channel variations are generally small in outdoor low-multipath environments, which limits the sensitivity of conventional Wi-Fi sensing. We have proposed a high-sensitivity motion detection method that exploits the frequency-domain regularity of CSI phase under low-multipath conditions. By averaging inter-antenna CSI phase differences over subcarriers, the method suppresses device-induced phase errors and random noise. This paper analyzes the principle of the proposed method in comparison with bistatic radar and derives the relationship between CSI phase variation and bistatic Doppler. Field examples of bird detection and an outdoor walking experiment are then presented. The measured spatial characteristics of the phase variation rate are compared with those predicted by a propagation model. The results clarify the mechanism underlying the sensitivity improvement and provide insight into the detection range of the proposed Wi-Fi sensing method.
Keyword (in Japanese) (See Japanese page) 
(in English) Wi-Fi Sensing / Channel State Information / ISAC / Motion Detection / OFDM Radar / Bistatic Radar / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 172, AP2026-94, pp. 122-127, Sept. 2026.
Paper # AP2026-94 
Date of Issue 2026-09-02 (AP) 
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 AP2026-94

Conference Information
Committee MW AP  
Conference Date 2026-09-09 - 2026-09-11 
Place (in Japanese) (See Japanese page) 
Place (in English) Ishikawa Prefectural Library 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave, Millimeter wave, Radio propagation, Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2026-09-MW-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Characteristics of High-Sensitivity Wi-Fi Sensing Exploiting Low-Multipath Environments 
Sub Title (in English)  
Keyword(1) Wi-Fi Sensing  
Keyword(2) Channel State Information  
Keyword(3) ISAC  
Keyword(4) Motion Detection  
Keyword(5) OFDM Radar  
Keyword(6) Bistatic Radar  
Keyword(7)  
Keyword(8)  
1st Author's Name Toshinori Suzuki  
1st Author's Affiliation Tohoku Gakuin University (Tohoku Gakuin Univ.)
2nd Author's Name Yu Morishima  
2nd Author's Affiliation Tohoku Gakuin University (Tohoku Gakuin Univ.)
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Speaker Author-1 
Date Time 2026-09-10 13:40:00 
Presentation Time 20 minutes 
Registration for AP 
Paper # AP2026-94 
Volume (vol) vol.126 
Number (no) no.172 
Page pp.122-127 
#Pages 6 
Date of Issue 2026-09-02 (AP) 

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