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An Efficient Indoor Wi-Fi Positioning Method Using Virtual Location of AP

Xu, Fan and Hu, Xuke and Luo, Shuaiwei and Shang, Jianga (2020) An Efficient Indoor Wi-Fi Positioning Method Using Virtual Location of AP. ISPRS International Journal of Geo-Information. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/ijgi9040261. ISSN 2220-9964.

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Wi-Fi fingerprinting has been widely used for indoor localization because of its good cost-effectiveness. However, it suffers from relatively low localization accuracy and robustness owing to the signal fluctuations. Virtual Access Points (VAP) can effectively reduce the impact of signal fluctuation problem in Wi-Fi fingerprinting. Current techniques normally use the Log-Normal Shadowing Model to estimate the virtual location of the access point. This would lead to inaccurate location estimation due to the signal attenuation factor in the model, which is difficult to be determined. To overcome this challenge, in this study, we propose a novel approach to calculating the virtual location of the access points by using the Apollonius Circle theory, specifically the distance ratio, which can eliminate the attenuation parameter term in the original model. This is based on the assumption that neighboring locations share the same attenuation parameter corresponding to the signal attenuation caused by obstacles. We evaluated the proposed method in a laboratory building with three different kinds of scenes and 1194 test points in total. The experimental results show that the proposed approach can improve the accuracy and robustness of the Wi-Fi fingerprinting techniques and achieve state-of-art performance.

Item URL in elib:https://elib.dlr.de/140278/
Document Type:Article
Title:An Efficient Indoor Wi-Fi Positioning Method Using Virtual Location of AP
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Xu, FanChina University of GeosciencesUNSPECIFIED
Hu, XukeXuke.Hu (at) dlr.deUNSPECIFIED
Luo, ShuaiweiChina University of GeosciencesUNSPECIFIED
Shang, JiangaChina University of GeosciencesUNSPECIFIED
Journal or Publication Title:ISPRS International Journal of Geo-Information
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.3390/ijgi9040261
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Keywords:indoor positioning; Wi-Fi fingerprinting; virtual AP; Apollonius circle
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Communication, Navigation and Surveillance (old)
Location: Jena
Institutes and Institutions:Institute of Data Science > Citizen Science
Institute of Data Science
Deposited By: Hu, Xuke
Deposited On:12 Jan 2021 10:20
Last Modified:12 Jan 2021 10:20

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