@techreport{oai:ipsj.ixsq.nii.ac.jp:00228977,
 author = {Ngoc, Lam Nguyen and Tomoyuki, Yashiro and Ngoc, Lam Nguyen and Tomoyuki, Yashiro},
 issue = {25},
 month = {Nov},
 note = {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.},
 title = {Proposal for a simultaneous calibration and localization using Wi-Fi Fine-Time Measurement Round Trip Time method using both uncooperative and cooperative Access Points},
 year = {2023}
}