| Paper Abstract and Keywords |
| Presentation |
2021-11-17 11:00
Evaluation of Impulse Response Estimation Algorithm for Indoor Wi-Fi Localization
Takahiro Matsuura, Daisuke Umehara (Kyoto Inst. of Tech.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
In recent years, there has been much research work on indoor localization using Wi-Fi. In this study, we focus on a Wi-Fi localization algorithm to estimate the location of a station (STA) using a single access point (AP) with multiple antennas, and discuss the impulse response estimation algorithm which is a key component of Chronos. This algorithm estimates the impulse response with high time resolution from the frequency responses of tens of available Wi-Fi channels. The rising edge of the impulse response is the direct wave component from the STA, which represents the radio propagation delay from the STA, i.e., the distance from the STA. The equations to estimate the high-resolution impulse response is underdetermined, but the impulse response is sparse because it consists of a small number of propagation paths. Therefore, the impulse response is estimated using an optimization algorithm that add an L1 regularization term to the mean square error (MSE). In this study, we implement the impose estimation algorithm and verify the appropriate L1 regularization weight based on the root MSE (RMSE). We also verify the estimation accuracy of the impulse response according to the signal-to-noise ratio (SNR). Furthermore, we estimate the radio propagation delay by detecting the rising edge of the estimated channel impulse response. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
indoor localization / Wi-Fi channels / channel frequency response / channel impulse response / propagation delay / underdetermined system / NDFT / |
| Reference Info. |
IEICE Tech. Rep. |
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| Download PDF |
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| Conference Information |
| Committee |
RISING |
| Conference Date |
2021-11-15 - 2021-11-17 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
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| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
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| Paper Information |
| Registration To |
RISING |
| Conference Code |
2021-11-RISING |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Evaluation of Impulse Response Estimation Algorithm for Indoor Wi-Fi Localization |
| Sub Title (in English) |
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| Keyword(1) |
indoor localization |
| Keyword(2) |
Wi-Fi channels |
| Keyword(3) |
channel frequency response |
| Keyword(4) |
channel impulse response |
| Keyword(5) |
propagation delay |
| Keyword(6) |
underdetermined system |
| Keyword(7) |
NDFT |
| Keyword(8) |
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| 1st Author's Name |
Takahiro Matsuura |
| 1st Author's Affiliation |
Kyoto Institute of Technology (Kyoto Inst. of Tech.) |
| 2nd Author's Name |
Daisuke Umehara |
| 2nd Author's Affiliation |
Kyoto Institute of Technology (Kyoto Inst. of Tech.) |
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| Speaker |
Author-1 |
| Date Time |
2021-11-17 11:00:00 |
| Presentation Time |
50 minutes |
| Registration for |
RISING |
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vol. |
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