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Combining Wi-Fi Fingerprinting and Pedestrian Dead Reckoning to Mitigate External Factors for a Sustainable Indoor Positioning System

Author

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  • Bhulakshmi Bonthu

    (School of Computer Science and Engineering, Vellore Institute of Technology, Vellore 632014, India)

  • Subaji Mohan

    (Institute for Industry and International Programmes, Vellore Institute of Technology, Vellore 632014, India)

Abstract

Wi-Fi-based indoor positioning systems are becoming increasingly prevalent in digital transitions; therefore, ensuring accurate and robust positioning is essential to supporting the growth in demand for smartphones’ location-based services. The indoor positioning system on a smartphone, which is generally based on Wi-Fi received signal strength (RSS) measurements or the fingerprinting comparison technique, uses the K-NN algorithm to estimate the position due to its high accuracy. The fingerprinting algorithm is popular due to its ease of implementation and its ability to produce the desired accuracy. However, in a practical environment, the Wi-Fi signal strength-based positioning system is highly influenced by external factors such as changes in the environment, human interventions, obstacles in the signal path, signal inconsistency, signal loss due to the barriers, the non-line of sight (NLOS) during signal propagation, and the high level of fluctuations in the RSS, which affects location accuracy. In this paper, we propose a method that combines pedestrian dead reckoning (PDR) and Wi-Fi fingerprinting to select a k-node to participate in the K-NN algorithm for fingerprinting-based IPSs. The selected K-node is used for the K-NN algorithm to improve the robustness and overall accuracy. The proposed hybrid method can overcome practical environmental issues and reduces the KNN algorithm’s complexity by selecting the nearest neighbors’ search space for comparison using the PDR position estimate as the reference position. Our approach provides a sustainable solution for indoor positioning systems, reducing energy consumption and improving the overall environmental impact. The proposed method has potential applications in various domains, such as smart buildings, healthcare, and retail. The proposed method outperforms the traditional KNN algorithm in our experimental condition since its average position error is less than 1.2 m, and provides better accuracy.

Suggested Citation

  • Bhulakshmi Bonthu & Subaji Mohan, 2023. "Combining Wi-Fi Fingerprinting and Pedestrian Dead Reckoning to Mitigate External Factors for a Sustainable Indoor Positioning System," Sustainability, MDPI, vol. 15(14), pages 1-18, July.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:14:p:10943-:d:1192581
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    References listed on IDEAS

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    1. Tao Liu & Xing Zhang & Huan Zhang & Nadeem Tahir & Zhixiang Fang, 2021. "A Structure Landmark-Based Radio Signal Mapping Approach for Sustainable Indoor Localization," Sustainability, MDPI, vol. 13(3), pages 1-18, January.
    2. Haoran Zhuang & Jian Zhang & Sivaparthipan C. B. & Bala Anand Muthu, 2020. "Sustainable Smart City Building Construction Methods," Sustainability, MDPI, vol. 12(12), pages 1-17, June.
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