| Presentation | 2020-01-30 A Proposal of People Counting by Using Wi-Fi Channel State Information of Mobile Devices Masahide Mizutani, Akira Uchiyama, 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) | People's distribution in public areas is useful for various services. Wi-Fi Channel State Information (CSI) has attracted attention as it does not require any additional deployment. However, the existing approaches assume multiple fixed infrastructures, such as Wi-Fi access points (APs). To solve this problem, we estimate the number of people (i.e., people counting) by using mobile devices and a small number of fixed APs. Since CSI represents the difference between the amplitude and the phase of the transmitted and received radio waves, we can estimate the change of the propagation environment from CSI. However, CSI is very noisy due to various factors. In this paper, we focus on Sampling frequency Offset (SFO), Carrier Frequency Offset (CFO), A/D Converter (ADC) delay and quantization error, and design methods to reduce their effects. Then, we construct a people estimation model by regression using the variance of CSI with noise removal as a location-independent feature. The evaluation results have shown that our method improves the Root-Mean-Squared-Error (RMSE) to 0.49. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Channel State Information / CSI / People Counting |
| Paper # | SeMI2019-102 |
| Date of Issue | 2020-01-23 (SeMI) |
| Conference Information | |
| Committee | SeMI |
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| Conference Date | 2020/1/30(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Susumu Ishihara(Shizuoka Univ.) |
| Vice Chair | Kazuya Monden(Hitachi) / Koji Yamamoto(Kyoto Univ.) |
| Secretary | Kazuya Monden(Kyoto Univ.) / Koji Yamamoto(NTT DOCOMO) |
| Assistant | Akira Uchiyama(Osaka Univ.) / Kenji Kanai(Waseda Univ.) / Masafumi Hashimoto(Osaka Univ.) |
| 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) | A Proposal of People Counting by Using Wi-Fi Channel State Information of Mobile Devices |
| Sub Title (in English) | |
| Keyword(1) | Channel State Information |
| Keyword(2) | CSI |
| Keyword(3) | People Counting |
| 1st Author's Name | Masahide Mizutani |
| 1st Author's Affiliation | Osaka University(Osaka Univ.) |
| 2nd Author's Name | Akira Uchiyama |
| 2nd Author's Affiliation | Osaka University(Osaka Univ.) |
| 3rd Author's Name | Tomoki Murakami |
| 3rd Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 4th Author's Name | Hirantha Abeysekera |
| 4th Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 5th Author's Name | Teruo Higashino |
| 5th Author's Affiliation | Osaka University(Osaka Univ.) |
| Date | 2020-01-30 |
| Paper # | SeMI2019-102 |
| Volume (vol) | vol.119 |
| Number (no) | SeMI-406 |
| Page | pp.pp.17-22(SeMI), |
| #Pages | 6 |
| Date of Issue | 2020-01-23 (SeMI) |