Feasibility Study of Practical AoA Estimation Using Compressed CSI on Commercial WLAN Devices
Wireless local area network (WLAN)-based localization is key for advanced indoor Internet-of-Things and embedded sensor applications. To further improve the accuracy of indoor localization, attention has been focused on WLAN-based indoor localization using channel-state information (CSI) in addition...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9733911/ |
| _version_ | 1828810979410968576 |
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| author | Takeru Fukushima Tomoki Murakami Hirantha Abeysekera Takuya Fujihashi Takashi Watanabe Shunsuke Saruwatari |
| author_facet | Takeru Fukushima Tomoki Murakami Hirantha Abeysekera Takuya Fujihashi Takashi Watanabe Shunsuke Saruwatari |
| author_sort | Takeru Fukushima |
| collection | DOAJ |
| description | Wireless local area network (WLAN)-based localization is key for advanced indoor Internet-of-Things and embedded sensor applications. To further improve the accuracy of indoor localization, attention has been focused on WLAN-based indoor localization using channel-state information (CSI) in addition to the existing information provided by received signal strength (RSS). For easy and low cost installation of wireless sensing, wireless sensing based on standardized protocols and commercial WLAN devices, such as IEEE 802.11ac and IEEE 802.11ax, is necessary. There are few papers demonstrating AoA estimation results by using commercial WLAN devices based on CSI. Therefore, we propose a practical method for estimating the AoA to solve four problems: 1) compressed CSI, which cannot be used for AoA estimation directly, 2) the antenna wireline, in which the phase changes depending on the length of the wireline, 3) the antenna spacing, in which the distance between antennas places a restriction on AoA estimation, and 4) antenna individuality, in which the antennas used in actual MIMO communication have different characteristics. We implemented the proposed method on IEEE 802.11ac devices and evaluated it in a lecture room and shield tent. The results indicate that the proposed method can estimate AoA with an average error of 9.1° and reduce the estimation error by 85.4 % compared with a straightforward approach. |
| first_indexed | 2024-12-12T09:20:09Z |
| format | Article |
| id | doaj.art-b04bf3ba266b43539f072d5713052b9d |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-12T09:20:09Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-b04bf3ba266b43539f072d5713052b9d2022-12-22T00:29:15ZengIEEEIEEE Access2169-35362022-01-0110491284914110.1109/ACCESS.2022.31593329733911Feasibility Study of Practical AoA Estimation Using Compressed CSI on Commercial WLAN DevicesTakeru Fukushima0https://orcid.org/0000-0001-6107-1513Tomoki Murakami1https://orcid.org/0000-0002-5617-155XHirantha Abeysekera2Takuya Fujihashi3https://orcid.org/0000-0002-6960-0122Takashi Watanabe4https://orcid.org/0000-0002-3227-9048Shunsuke Saruwatari5https://orcid.org/0000-0002-1625-5521Access Network Service Systems Laboratories, NTT Corporation, Yokosuka, JapanAccess Network Service Systems Laboratories, NTT Corporation, Yokosuka, JapanAccess Network Service Systems Laboratories, NTT Corporation, Yokosuka, JapanGraduate School of Information Science and Technology, Osaka University, Osaka, JapanGraduate School of Information Science and Technology, Osaka University, Osaka, JapanGraduate School of Information Science and Technology, Osaka University, Osaka, JapanWireless local area network (WLAN)-based localization is key for advanced indoor Internet-of-Things and embedded sensor applications. To further improve the accuracy of indoor localization, attention has been focused on WLAN-based indoor localization using channel-state information (CSI) in addition to the existing information provided by received signal strength (RSS). For easy and low cost installation of wireless sensing, wireless sensing based on standardized protocols and commercial WLAN devices, such as IEEE 802.11ac and IEEE 802.11ax, is necessary. There are few papers demonstrating AoA estimation results by using commercial WLAN devices based on CSI. Therefore, we propose a practical method for estimating the AoA to solve four problems: 1) compressed CSI, which cannot be used for AoA estimation directly, 2) the antenna wireline, in which the phase changes depending on the length of the wireline, 3) the antenna spacing, in which the distance between antennas places a restriction on AoA estimation, and 4) antenna individuality, in which the antennas used in actual MIMO communication have different characteristics. We implemented the proposed method on IEEE 802.11ac devices and evaluated it in a lecture room and shield tent. The results indicate that the proposed method can estimate AoA with an average error of 9.1° and reduce the estimation error by 85.4 % compared with a straightforward approach.https://ieeexplore.ieee.org/document/9733911/Wireless sensingangle-of-arrival estimationIEEE 80211acIEEE 80211axcompressed CSI |
| spellingShingle | Takeru Fukushima Tomoki Murakami Hirantha Abeysekera Takuya Fujihashi Takashi Watanabe Shunsuke Saruwatari Feasibility Study of Practical AoA Estimation Using Compressed CSI on Commercial WLAN Devices IEEE Access Wireless sensing angle-of-arrival estimation IEEE 80211ac IEEE 80211ax compressed CSI |
| title | Feasibility Study of Practical AoA Estimation Using Compressed CSI on Commercial WLAN Devices |
| title_full | Feasibility Study of Practical AoA Estimation Using Compressed CSI on Commercial WLAN Devices |
| title_fullStr | Feasibility Study of Practical AoA Estimation Using Compressed CSI on Commercial WLAN Devices |
| title_full_unstemmed | Feasibility Study of Practical AoA Estimation Using Compressed CSI on Commercial WLAN Devices |
| title_short | Feasibility Study of Practical AoA Estimation Using Compressed CSI on Commercial WLAN Devices |
| title_sort | feasibility study of practical aoa estimation using compressed csi on commercial wlan devices |
| topic | Wireless sensing angle-of-arrival estimation IEEE 80211ac IEEE 80211ax compressed CSI |
| url | https://ieeexplore.ieee.org/document/9733911/ |
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