| Presentation | 2021-03-02 [Poster Presentation] A Preliminary Study on Wi-Fi CSI Imaging Kazuki Okawara, Akira Uchiyama, Viktor Erdelyi, Tomoki Murakami, Hirantha Abeysekera, Teruo Higashino, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Human activity recognition using Wi-Fi CSI (Channel State Information) has been widely studied recently. CSI has advantages of low deployment cost and less privacy concern. On the other hand, CSI-based human activity recognition requires a heavy human effort for training data collection for each environment. One of solutions is Wi-Fi imaging which maps signal strength for each direction based on phase difference between antennas of an array. Because the phase difference is calculated based on the inter-antenna distance, Wi-Fi imaging is performed independently of environment. If Wi-Fi imaging is capable of capturing locations and/or poses of humans, it may be applicable to human localization and/or activity recognition. In this paper, we implemented Wi-Fi CSI imaging by an array of four antennas and conducted preliminary experiment by using a copper plate. From the results, we confirmed that imaging of the copper plate is possible for the angles between 60 and 120 degrees to the surface of the antenna array in the environment without reflection from surroundings. |
| Keyword(in Japanese) | (See Japanese page) |
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| Paper # | SeMI2020-68 |
| Date of Issue | 2021-02-22 (SeMI) |
| Conference Information | |
| Committee | SeMI / IPSJ-MBL / IPSJ-UBI |
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| Conference Date | 2021/3/1(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Mobile Computing, Ubiquitous Computing, etc. |
| Chair | Susumu Ishihara(Shizuoka Univ.) |
| Vice Chair | Kazuya Monden(Hitachi) / Koji Yamamoto(Kyoto Univ.) |
| Secretary | Kazuya Monden(Kyoto Univ.) / Koji Yamamoto(Cyber Univ.) / (Hitachi) / (Waseda Univ.) |
| Assistant | Yuki Katsumata(NTT DOCOMO) / Yu Nakayama(Tokyo Univ. of Agri. and Tech.) / Akira Uchiyama(Osaka Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Sensor Network and Mobile Intelligence / Special Interest Group on Mobile Computing and Pervasive Systems / Special Interest Group on Ubiquitous Computing System |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Poster Presentation] A Preliminary Study on Wi-Fi CSI Imaging |
| Sub Title (in English) | |
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| 1st Author's Name | Kazuki Okawara |
| 1st Author's Affiliation | Osaka University(Osaka Univ.) |
| 2nd Author's Name | Akira Uchiyama |
| 2nd Author's Affiliation | Osaka University/Japan Science and Technology Agency, PRESTO(Osaka Univ./JST PRESTO) |
| 3rd Author's Name | Viktor Erdelyi |
| 3rd Author's Affiliation | Osaka University(Osaka Univ.) |
| 4th Author's Name | Tomoki Murakami |
| 4th Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 5th Author's Name | Hirantha Abeysekera |
| 5th Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 6th Author's Name | Teruo Higashino |
| 6th Author's Affiliation | Osaka University(Osaka Univ.) |
| Date | 2021-03-02 |
| Paper # | SeMI2020-68 |
| Volume (vol) | vol.120 |
| Number (no) | SeMI-382 |
| Page | pp.pp.63-66(SeMI), |
| #Pages | 4 |
| Date of Issue | 2021-02-22 (SeMI) |