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• W2890196784 abstract "Fingerprinting-based Wi-Fi indoor positioning has great potential for positioning in GPS-denied areas. However, establishing a fingerprinting map (also called a radio map) prior to positioning (site survey) is normally a labor-intensive task. This paper proposes a method for easy site survey without need for any extra hardware. The user can conduct the site survey adopting only a smart phone. The collected inertial-based readings are processed using the pedestrian dead-reckoning algorithms to generate a raw trajectory. Then a factor graph optimization method is proposed to re-estimate the trajectory by adding constraints originated from collected Wi-Fi fingerprints and landmark positions. The proposed method is verified through an experiment in a mall. The mean positioning error is 1.10 m and the maximum error is 2.25 m. This level of positioning accuracy is considered sufficient for radio map generation purposes. A classical baseline algorithm, the k-Nearest Neighbor (kNN) algorithm, is adopted to test the positioning performance of the radio map (RM), which also validates the quality of the constructed RM from the proposed method." @default.
• W2890196784 created "2018-09-27" @default.
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• W2890196784 date "2018-09-14" @default.
• W2890196784 modified "2023-10-06" @default.
• W2890196784 title "Optimization-Based Wi-Fi Radio Map Construction for Indoor Positioning Using Only Smart Phones" @default.
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• W2890196784 doi "https://doi.org/10.3390/s18093095" @default.
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