2026-03-07T12:50:21Z https://ipsj.ixsq.nii.ac.jp/oai

oai:ipsj.ixsq.nii.ac.jp:00229026 2025-01-19T11:38:08Z 1164:3980:11162:11356

Proposal for a simultaneous calibration and localization using Wi-Fi Fine-Time Measurement Round Trip Time method using both uncooperative and cooperative Access Points Proposal for a simultaneous calibration and localization using Wi-Fi Fine-Time Measurement Round Trip Time method using both uncooperative and cooperative Access Points Ngoc, Lam Nguyen Tomoyuki, Yashiro Ngoc, Lam Nguyen Tomoyuki, Yashiro 人流とネットワーク One-sided Wi-Fi fine-time measurement (FTM) of signal round trip time (RTT) is one of the more promising solutions to adapting the Wi-Fi FTM RTT protocol on uncooperative Wi-Fi access points (AP). One of the major obstacles to this approach is the measurements have a large bias, making the raw distance measurement 5-10 times bigger than the real distance, which is unusable for positioning. There has been previous study to mitigate this, by using Gauss-Newton algorithm to perform simultaneous localization and calibration. However, the study assumed a universal offset to be applied to all APs and did not consider the case of having Wi-Fi FTM capable APs or APs that have different characteristics in the environment. This paper presents a solution to integrate such APs to improve the offset calculation for uncooperative APs. One-sided Wi-Fi fine-time measurement (FTM) of signal round trip time (RTT) is one of the more promising solutions to adapting the Wi-Fi FTM RTT protocol on uncooperative Wi-Fi access points (AP). One of the major obstacles to this approach is the measurements have a large bias, making the raw distance measurement 5-10 times bigger than the real distance, which is unusable for positioning. There has been previous study to mitigate this, by using Gauss-Newton algorithm to perform simultaneous localization and calibration. However, the study assumed a universal offset to be applied to all APs and did not consider the case of having Wi-Fi FTM capable APs or APs that have different characteristics in the environment. This paper presents a solution to integrate such APs to improve the offset calculation for uncooperative APs. technical report 情報処理学会 2023-11-08 application/pdf 研究報告高度交通システムとスマートコミュニティ（ITS） 25 2023-ITS-95 1 7 2188-8965 AA11515904 https://ipsj.ixsq.nii.ac.jp/record/229026/files/IPSJ-ITS23095025.pdf eng