抄録
Measurement of a person's facing direction is useful in location-based context-aware systems. This paper presents an indoor location and facing direction measurement system based on propagation loss of Bluetooth wireless communication. Several fixed Bluetooth stations are installed in a room. A person carries two Bluetooth transceivers: one in the front and the other in the back. Distance between a transceiver and a fixed station is estimated from received signal strength indication (RSSI). Location is calculated from three estimated distances, and facing direction is obtained from RSSI difference between the two transceivers. The transceiver that has the direct view of the fixed station gives higher RSSI. Overall accuracies were 1m for location and 11 degrees for facing direction.
