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Fingerprinting Based Indoor Localization Considering the Dynamic Nature of Wi-Fi Signals

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Abstract

Current localization techniques in outdoors cannot work well in indoors. Wi-Fi fingerprinting technique is an emerging localization technique for indoor environments. However in this technique, the dynamic nature of WiFi signals affects the accuracy of the measurements. In this paper, we use affinity propagation clustering method to decrease the computation complexity in location estimation. Then, we use the least variance of Received Signal Strength (RSS) measured among Access Points (APs) in each cluster. Also we assign lower weights to altering APs for each point in a cluster, to represent the level of similarity to Test Point (TP) by considering the dynamic nature of signals in indoor environments. A method for updating the radio map and improving the results is then proposed to decrease the cost of constructing the radio map. Simulation results show that the proposed method has 22.5% improvement in average in localization results, considering one altering AP in the layout, compared to the case when only RSS subset sampling is considered for localization because of altering APs.

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Acknowledgements

Vahideh Moghtadaiee gratefully acknowledges the support provided by the Iran National Science Foundation (INSF) for this work.

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Authors and Affiliations

  1. Cyberspace Research Institute, Shahid Beheshti University, Tehran, Iran

    Nasim Alikhani & Vahideh Moghtadaiee

  2. Cognitive Telecommunication Research Group, Department of Telecommunications, Faculty of Electrical Engineering, Shahid Beheshti University, Tehran, Iran

    Seyed Ali Ghorashi

  3. School of Architecture, Computing and Engineering, University of East London, London, UK

    Seyed Ali Ghorashi

Authors
  1. Nasim Alikhani
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  2. Vahideh Moghtadaiee
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  3. Seyed Ali Ghorashi
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Correspondence to Seyed Ali Ghorashi.

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Alikhani, N., Moghtadaiee, V. & Ghorashi, S.A. Fingerprinting Based Indoor Localization Considering the Dynamic Nature of Wi-Fi Signals. Wireless Pers Commun 115, 1445–1464 (2020). https://doi.org/10.1007/s11277-020-07636-0

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