Wireless network system for indoor human positioning

A local positioning system utilizing propagation loss of Bluetooth wireless technology is developed for indoor human positioning. The distance between a fixed station and a mobile station carried by a person is derived from the propagation loss. The position of the person is calculated from distance measurements on three different fixed stations. The positioning accuracy was 1.2 m at average fixed station installation density of one station in every 8.3 m². The system is intended for tracking worker´s position in a work environment such as in shipyards.