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Paper Abstract and Keywords
Presentation 2022-01-20 15:20
[Short Paper] A Study of Beamforming Feedback-based Model-driven Angle of Departure Estimation
Sohei Itahara (Kyoto Univ.), Takayuki Nishio (Kyoto Univ./Tokyo Tech.), Koji Yamamoto (Kyoto Univ.) SeMI2021-68
Abstract (in Japanese) (See Japanese page) 
(in English) This paper introduces the angle of departure (AoD) estimation method [1] using the multiple signal classification (MUSIC) with only WiFi control frames for beamforming feedback (BFF), defined in IEEE 802.11ac/ax. Although channel state information (CSI) enables model-driven AoD estimation, most BFF-based sensing techniques are data-driven because they only contain the right singular vectors of CSI and subcarrier-averaged stream gain. Specifically, we find that right singular vectors with a subcarrier-averaged stream gain of zero have the same role as the noise subspace vectors in the CSI-based MUSIC algorithm. Numerical evaluations confirm that the proposed BFF-based MUSIC successfully estimates the AoDs and gains for all propagation paths. Meanwhile, this result implies a potential privacy risk; a malicious sniffer can carry out AoD estimation only with unencrypted BFF frames.
Keyword (in Japanese) (See Japanese page) 
(in English) Wireless sensing / channel state information / angle of departure / beamforming feedback / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 333, SeMI2021-68, pp. 59-61, Jan. 2022.
Paper # SeMI2021-68 
Date of Issue 2022-01-13 (SeMI) 
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)
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Conference Information
Committee SeMI  
Conference Date 2022-01-20 - 2022-01-21 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SeMI 
Conference Code 2022-01-SeMI 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study of Beamforming Feedback-based Model-driven Angle of Departure Estimation 
Sub Title (in English)  
Keyword(1) Wireless sensing  
Keyword(2) channel state information  
Keyword(3) angle of departure  
Keyword(4) beamforming feedback  
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1st Author's Name Sohei Itahara  
1st Author's Affiliation Kyoto University (Kyoto Univ.)
2nd Author's Name Takayuki Nishio  
2nd Author's Affiliation Kyoto University/Tokyo Institute of Technology (Kyoto Univ./Tokyo Tech.)
3rd Author's Name Koji Yamamoto  
3rd Author's Affiliation Kyoto University (Kyoto Univ.)
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Speaker Author-1 
Date Time 2022-01-20 15:20:00 
Presentation Time 10 minutes 
Registration for SeMI 
Paper # SeMI2021-68 
Volume (vol) vol.121 
Number (no) no.333 
Page pp.59-61 
#Pages 3 
Date of Issue 2022-01-13 (SeMI) 

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