Provided by: Ternios AB
Often mobile devices like mobile phones or Personal Digital Assistants (PDA) are equipped with IEEE 802.11 WLAN adapters. Furthermore, within many buildings a WLAN infrastructure is available. The aim of this paper is to investigate the quality of different indoor positioning methods based on values of WLAN Received Signal Strength Index (RSSI) using commercially available devices (mobile phones, PDA). Three positioning algorithms were considered: minimal Euclidian distance, intersections of RSSI-Isolines and a stochastic model based on Bayes' theorem.