| 講演名 | 2017-12-19 Tracking 1D Hand Motion Directivity by Estimating Doppler Frequency of CSI Information from Commodity Wi-Fi Devices Nopphon Keerativoranan(東工大), Jun-ichi Takada(東工大), |
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| 抄録(和) | Device-free hand motion tracking in the air becomes an essential tool for today human-computing interaction applications such as smart home, virtual and augmented reality. Typical tracking, mostly a camera-based application, has some limitations; small tracking coverage, surrounding light dependency, and requirement of obstacle-free area. In this report, we show the possibility of tracking 1D hand motion by exploiting channel state information (CSI) from commercial Wi-Fi infrastructure. Empirically, it was proved that, after removing linear phase offset, sanitized CSI could be sufficiently reconstructed from its sanitized phase and amplitude where motion pattern and directivity are well-preserved. In the experiment, the velocity profile of hand moving toward and away from Wi-Fi receiver was retrieved as a temporal-Doppler representation by taking Wavelet transform of sanitized CSI. Moreover, it was found that this motion pattern, unfortunately, could be able to retrieve at only some subcarriers. According to our observation, it is possibly due to amplitude fading and an anomaly phase jump during sanitization resulting in directivity losing after reconstruction of Sanitized CSI. |
| 抄録(英) | Device-free hand motion tracking in the air becomes an essential tool for today human-computing interaction applications such as smart home, virtual and augmented reality. Typical tracking, mostly a camera-based application, has some limitations; small tracking coverage, surrounding light dependency, and requirement of obstacle-free area. In this report, we show the possibility of tracking 1D hand motion by exploiting channel state information (CSI) from commercial Wi-Fi infrastructure. Empirically, it was proved that, after removing linear phase offset, sanitized CSI could be sufficiently reconstructed from its sanitized phase and amplitude where motion pattern and directivity are well-preserved. In the experiment, the velocity profile of hand moving toward and away from Wi-Fi receiver was retrieved as a temporal-Doppler representation by taking Wavelet transform of sanitized CSI. Moreover, it was found that this motion pattern, unfortunately, could be able to retrieve at only some subcarriers. According to our observation, it is possibly due to amplitude fading and an anomaly phase jump during sanitization resulting in directivity losing after reconstruction of Sanitized CSI. |
| キーワード(和) | Channel state information / Wireless LAN / Motion detection / Human computer interaction / Doppler effect / Wavelet transforms |
| キーワード(英) | Channel state information / Wireless LAN / Motion detection / Human computer interaction / Doppler effect / Wavelet transforms |
| 資料番号 | MW2017-145 |
| 発行日 | 2017-12-12 (MW) |
| 研究会情報 | |
| 研究会 | MW |
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| 開催期間 | 2017/12/19(から2日開催) |
| 開催地（和） | 国士舘大学 |
| 開催地（英） | |
| テーマ（和） | 学生研究会/マイクロ波一般 |
| テーマ（英） | |
| 委員長氏名（和） | 村口 正弘(東京理科大) |
| 委員長氏名（英） | Masahiro Muraguchi(TUC) |
| 副委員長氏名（和） | 古神 義則(宇都宮大) / 岡崎 浩司(NTTドコモ) / 田島 賢一(三菱電機) |
| 副委員長氏名（英） | Yoshinori Kogami(Utsunomiya Univ.) / Hiroshi Okazaki(NTTdocomo) / Kenichi Tajima(Mitsubishi Electric) |
| 幹事氏名（和） | 平野 拓一(東工大) / 中村 宝弘(日立) |
| 幹事氏名（英） | Takuichi Hirano(Tokyo Inst. of Tech.) / Takahiro Nakamura(HITACHI) |
| 幹事補佐氏名（和） | 小野 哲(電通大) / 本良 瑞樹(東北大) |
| 幹事補佐氏名（英） | Satoshi Ono(Univ. of Electro-Comm.) / Mizuki Motoyoshi(Tohoku Univ.) |
| 講演論文情報詳細 | |
| 申込み研究会 | Technical Committee on Microwaves |
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| 本文の言語 | ENG |
| タイトル（和） | |
| サブタイトル（和） | |
| タイトル（英） | Tracking 1D Hand Motion Directivity by Estimating Doppler Frequency of CSI Information from Commodity Wi-Fi Devices |
| サブタイトル（和） | |
| キーワード(1)（和/英） | Channel state information / Channel state information |
| キーワード(2)（和/英） | Wireless LAN / Wireless LAN |
| キーワード(3)（和/英） | Motion detection / Motion detection |
| キーワード(4)（和/英） | Human computer interaction / Human computer interaction |
| キーワード(5)（和/英） | Doppler effect / Doppler effect |
| キーワード(6)（和/英） | Wavelet transforms / Wavelet transforms |
| 第 1 著者 氏名（和/英） | Nopphon Keerativoranan / Nopphon Keerativoranan |
| 第 1 著者 所属（和/英） | Tokyo Institute of Technology(略称：東工大) Tokyo Institute of Technology(略称：Titech) |
| 第 2 著者 氏名（和/英） | Jun-ichi Takada / Jun-ichi Takada |
| 第 2 著者 所属（和/英） | Tokyo Institute of Technology(略称：東工大) Tokyo Institute of Technology(略称：Titech) |
| 発表年月日 | 2017-12-19 |
| 資料番号 | MW2017-145 |
| 巻番号（vol） | vol.117 |
| 号番号（no） | MW-366 |
| ページ範囲 | pp.19-24(MW), |
| ページ数 | 6 |
| 発行日 | 2017-12-12 (MW) |