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| Presentation | 2021-11-26 15:00 [Poster Presentation] Frame-Capture-Based CSI Recomposition Pertaining to Firmware-Agnostic WiFi Sensing Ryosuke Hanahara, Sohei Itahara, Kota Yamashita (Kyoto Univ.), Yusuke Koda (Univ. Oulu), Akihito Taya (Kyoto Univ./Aoyama Gakuin Univ.), Takayuki Nishio (Kyoto Univ./Tokyo Tech.), Koji Yamamoto (Kyoto Univ.)  SRW2021-48 SeMI2021-47 CNR2021-22 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This paper presents an estimation method of channel state information (CSI) matrices using corresponding beamforming feedback matrices (BFMs) contained in WLAN frames. The BFM is a right singular matrix computed by singular value decomposition of the CSI matrix. The CSI matrix is processed and discarded at the physical layer, while the BFM is exchanged between the access point and station and can be obtained by frame capturing. On the other hand, more sensing tasks are based on CSI matrices rather than BFM. To fill this gap, this method uses machine learning to reconstruct the CSI matrices from the BFMs. The simulation results show that the estimated CSI amplitude approximates the ground-truth, and leveraging BFMs on multiple subcarriers enhances prediction accuracy. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | channel state information / beamforming feedback / singular value decomposition / wireless sensing / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 121, no. 266, SeMI2021-47, pp. 58-60, Nov. 2021. | |
| Paper # | SeMI2021-47 | |
| Date of Issue | 2021-11-18 (SRW, SeMI, CNR) | |
| 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 | SRW2021-48 SeMI2021-47 CNR2021-22 |
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| Conference Information | |
| Committee | SRW SeMI CNR |
| Conference Date | 2021-11-25 - 2021-11-26 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | IoT Workshop |
| Paper Information | |
| Registration To | SeMI |
| Conference Code | 2021-11-SRW-SeMI-CNR |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Frame-Capture-Based CSI Recomposition Pertaining to Firmware-Agnostic WiFi Sensing |
| Sub Title (in English) | |
| Keyword(1) | channel state information |
| Keyword(2) | beamforming feedback |
| Keyword(3) | singular value decomposition |
| Keyword(4) | wireless sensing |
| Keyword(5) | |
| Keyword(6) | |
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| 1st Author's Name | Ryosuke Hanahara |
| 1st Author's Affiliation | Kyoto University (Kyoto Univ.) |
| 2nd Author's Name | Sohei Itahara |
| 2nd Author's Affiliation | Kyoto University (Kyoto Univ.) |
| 3rd Author's Name | Kota Yamashita |
| 3rd Author's Affiliation | Kyoto University (Kyoto Univ.) |
| 4th Author's Name | Yusuke Koda |
| 4th Author's Affiliation | University of Oulu (Univ. Oulu) |
| 5th Author's Name | Akihito Taya |
| 5th Author's Affiliation | Kyoto University/Aoyama Gakuin University (Kyoto Univ./Aoyama Gakuin Univ.) |
| 6th Author's Name | Takayuki Nishio |
| 6th Author's Affiliation | Kyoto University/Tokyo Institute of Technology (Kyoto Univ./Tokyo Tech.) |
| 7th Author's Name | Koji Yamamoto |
| 7th Author's Affiliation | Kyoto University (Kyoto Univ.) |
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| Speaker | Author-1 |
| Date Time | 2021-11-26 15:00:00 |
| Presentation Time | 120 minutes |
| Registration for | SeMI |
| Paper # | SRW2021-48, SeMI2021-47, CNR2021-22 |
| Volume (vol) | vol.121 |
| Number (no) | no.265(SRW), no.266(SeMI), no.267(CNR) |
| Page | pp.71-73(SRW), pp.58-60(SeMI), pp.48-50(CNR) |
| #Pages | 3 |
| Date of Issue | 2021-11-18 (SRW, SeMI, CNR) |
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