摘要：The positioning system based on RSSI is extremely affected by the multipath transmission medium, the signal transmission and shadow. Even changing the angle of the antenna is likely to affect the ranging accuracy. In order to solve the problems above, this paper proposes an indoor optimal positioning algorithm based on Wi-Fi signal strength. It introduces positioning evaluation function, using the optimal algorithm to get a set of path loss exponent to improve the positioning accuracy. Experiment results show that the algorithm can obtain higher positioning accuracy without priori information of indoor environment or additional hardware investment.
关键词：WiFi; RSSI; Distance Loss Model; Optimal Positioning
