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Paper Abstract and Keywords
Presentation 2021-08-20 10:25
Low Complexity Channel Analysis using Discrete Fourier Basis for Wireless LAN Sensing
Yuhei Nagao (Radrix), Kosuke Tsuji, Ryotaro Isshiki, Leonardo Lanante (Kyutech), Hiroshi Ochi (Radrix) AP2021-49
Abstract (in Japanese) (See Japanese page) 
(in English) Channel State Information (CSI) sensing over wireless LAN is gathering attention, because it enables economically and easily to apply several applications in smart homes and healthcare, such as a human detection, motion detection and vital signs monitoring. In CSI sensing, principal component analysis (PCA) is used for feature extraction and dimensionality reduction as a step of machine learning. However, the computational complexity of PCA is high due to its singular value decomposition (SVD). In this paper, we propose a low complexity CSI analysis
method which performs an imperfect diagonalization using discrete Fourier basis. This approach is based on the characteristics of OFDM transmission. The real experiments show that the proposed method has three effectiveness in following aspects, computational complexity, feature extraction, and dimensionality reduction.
Keyword (in Japanese) (See Japanese page) 
(in English) Wireless LAN / Sensing / Data Analysis / PCA / CSI / SVD / DFT / Diagonalization  
Reference Info. IEICE Tech. Rep., vol. 121, no. 141, AP2021-49, pp. 7-12, Aug. 2021.
Paper # AP2021-49 
Date of Issue 2021-08-13 (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 AP2021-49

Conference Information
Committee AP  
Conference Date 2021-08-20 - 2021-08-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2021-08-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Low Complexity Channel Analysis using Discrete Fourier Basis for Wireless LAN Sensing 
Sub Title (in English)  
Keyword(1) Wireless LAN  
Keyword(2) Sensing  
Keyword(3) Data Analysis  
Keyword(4) PCA  
Keyword(5) CSI  
Keyword(6) SVD  
Keyword(7) DFT  
Keyword(8) Diagonalization  
1st Author's Name Yuhei Nagao  
1st Author's Affiliation Radrix co.,ltd. (Radrix)
2nd Author's Name Kosuke Tsuji  
2nd Author's Affiliation Kyushu Institute of Technology (Kyutech)
3rd Author's Name Ryotaro Isshiki  
3rd Author's Affiliation Kyushu Institute of Technology (Kyutech)
4th Author's Name Leonardo Lanante  
4th Author's Affiliation Kyushu Institute of Technology (Kyutech)
5th Author's Name Hiroshi Ochi  
5th Author's Affiliation Radrix co.,ltd. (Radrix)
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Speaker Author-1 
Date Time 2021-08-20 10:25:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2021-49 
Volume (vol) vol.121 
Number (no) no.141 
Page pp.7-12 
Date of Issue 2021-08-13 (AP) 

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