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G. Retscher, A. Stangl:
"A Self-learning Fingerprinting Matching Algorithm for Indoor Wi-Fi Positioning";
Talk: ION PLANS 2018 Conference, Monterey, USA (invited); 2018-04-23 - 2018-04-26; in: "ION PLANS 2018 Conference", (2018), Paper ID 124, 11 pages.

Wi-Fi location fingerprinting is nowadays a popular indoor localization technique. The self-learning fingerprinting matching approach presented in this paper is a new strategy to reduce the labor and time consuming system training. Continuous training is performed instead of a dedicated training phase before positioning of a user is possible. Verified RSSI (Received Signal Strength Indicator) scans made by the users´ mobile device are then included into the fingerprinting database and continuously update the system. Due to this continuous system training spatial and temporal RSSI variations can be accommodated and modelled. With this approach a significant increase in localization accuracy and performance is achieved. Tests in a multi-storey office environment and a two storey residential apartment as well as a medical praxis showed matching rates of over 90 % for the localization of the mobile user in a certain room.

Indoor positioning, Wi-Fi, location fingerprinting, RSSI measurements, system training, matching approach, self-learning strategy