A novel positioning method for WLAN based on propagation modeling

In recent years, many researchers have paid attention to using the existing wireless local area network infrastructure to estimate position. There are two kinds of signal-strength-based modeling for WLAN positioning system: propagation modeling and fingerprinting modeling. The propagation modeling can not have high positioning accuracy; and the fingerprinting modeling will take great effort and time. In this paper, a novel method is proposed to determine the position of user according to the ratio of distances from the difference of RSSI, which improves the more accuracy than traditional propagation modeling and saves the more cost than fingerprinting modeling. Also, one filtering measure is presented to discard incorrect information. It makes the positioning system work efficiently.