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.


    Access

    Download


    Export, share and cite



    Title :

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


    Contributors:
    Xu, Fan (author) / Hu, Xuke (author) / Luo, Shuaiwei (author) / Shang, Jianga (author)


    Publication date :

    2020



    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Location Drift Detection Method for Monocular Vision based Indoor Positioning

    Jia, Shuang / Ma, Lin / Wei, Shouming et al. | IEEE | 2022


    INDOOR POSITIONAL INFORMATION POSITIONING SYSTEM AND INDOOR POSITIONAL INFORMATION POSITIONING METHOD

    SAKURAI ATSUSHI / UENO MASAMI / TAKAYA KAZUYUKI | European Patent Office | 2016

    Free access

    Indoor taxi-cab : real-time Indoor positioning and location-based services with Ekahau and Android OS

    Kilinc, Caner / Mostafa, Seraj al Mahmud / Islam, Raihan Ul et al. | BASE | 2014

    Free access

    Geometry-Aided BLE-Based Smartphone Positioning for Indoor Location-Based Services

    Rudic, Branislav / Klaffenbock, Maria Anneliese / Pichler-Scheder, Markus et al. | IEEE | 2020