| Presentation | 2022-01-20 [Short Paper] A Study of Beamforming Feedback-based Model-driven Angle of Departure Estimation Sohei Itahara, Takayuki Nishio, Koji Yamamoto, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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) |
| Keyword(in English) | Wireless sensing / channel state information / angle of departure / beamforming feedback |
| Paper # | SeMI2021-68 |
| Date of Issue | 2022-01-13 (SeMI) |
| Conference Information | |
| Committee | SeMI |
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| Conference Date | 2022/1/20(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Koji Yamamoto(Kyoto Univ.) |
| Vice Chair | Kazuya Monden(Hitachi) / Yasunori Owada(NICT) |
| Secretary | Kazuya Monden(Cyber Univ.) / Yasunori Owada(Waseda Univ.) |
| Assistant | Yuki Katsumata(NTT DOCOMO) / Akihito Taya(Aoyama Gakuin Univ.) / Yu Nakayama(Tokyo Univ. of Agri. and Tech.) |
| Paper Information | |
| Registration To | Technical Committee on Sensor Network and Mobile Intelligence |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Short Paper] 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 |
| 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.) |
| Date | 2022-01-20 |
| Paper # | SeMI2021-68 |
| Volume (vol) | vol.121 |
| Number (no) | SeMI-333 |
| Page | pp.pp.59-61(SeMI), |
| #Pages | 3 |
| Date of Issue | 2022-01-13 (SeMI) |