Radio communication base station based three-dimensional positioning method

Abstract

The invention provides a radio communication base station based three-dimensional positioning method. A mobile terminal is positioned on the basis of information of distance from a communication basestation to the terminal as well as position information of the base station. Spreading time of an electric signal is converted into distance, and coordinates of the terminal is solved on the basis that coordinates of the base station are known. The electric signal is influenced by factors including non-line-of-sight spreading, measuring precision and clock asynchrony in the spreading process, an error model of the measurement distance needs to be established, a conversion relation between the measurement distance and real-distance is found, and a relatively accurate positioning model is established in a certain specific scene. Positioning is carried out on the premise that there are at least for communication base stations within the communication radius scope of the mobile terminal. The precision of a positioning algorithm is dependent on the number of base stations of a place of the terminal. The invention further provides a communication base station selecting strategy in the scene.

Description

technical field [0001] The invention belongs to the field of wireless positioning, and the method realizes positioning through a wireless communication base station. technical background [0002] With the rapid development of wireless communication networks, providing Location Based SerXice (LBS for short) has become one of the services with the greatest development potential and market prospect. Although commercial GPS has been widely used with the development of mobile terminals, GPS positioning performance is poor in many scenarios such as urban areas with many tall buildings, inside buildings, and underground parking lots. Compared with GPS positioning, the positioning system based on wireless network base stations can achieve breakthroughs in the above scenarios, and has greater advantages in depth and breadth. Based on the wireless communication system, the measured physical and physical indicators such as signal strength and propagation time are converted into inform...

AI Technical Summary

Problems solved by technology

At present, most of the indoor positioning and navigation methods rely on the communication between Wi-Fi devices and mobile terminals, but the limited coverage of Wi-Fi devices and the information security of unfamiliar Wi-Fi devices have become obvious disadvantages of such methods.

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