Indoor and Outdoor Fusion Positioning and Security Technology Based on Beidou Satellite

Location information service is especially important in complex environment. With the increasing demand of Beidou satellite navigation system in China, Beidou satellite navigation integrates with other GNSS positioning, navigation and timing technologies such as mobile base station, WLAN station and so on, and becomes an important means to solve the seamless positioning in and out of the room. A kind of indoor seamless fusion positioning technology which combines WiFi signal fingerprint matching and positioning technology with outdoor Beidou satellite high sensitivity receiving technology and anti-multipath technology is proposed in this paper. A dual-mode receiver with Beidou second generation receiving module and WiFi module was selected in the experiment. Beidou satellite positioning is used outdoors. When entering the room, the AP access point which is known to receive the position information is switched to the fingerprint matching algorithm to realize the indoor positioning. Simulation results show that the indoor and outdoor fusion positioning technology based on Beidou can realize seamless switching of indoor and outdoor positioning, and this indoor positioning algorithm based on WiFi can effectively improve the applicability and positioning accuracy of the positioning system.