Indoor positioning system based on array antenna

The invention discloses an indoor positioning system based on an array antenna, and relates to the technical field of indoor positioning. The system comprises a positioning tag, a positioning base station and a positioning server, wherein the positioning tag intermittently sends a signal which contains tag ID (Identity) information; the positioning base station receives the signal and analyzes therelative position of the positioning tag, and sends the relative position information to the positioning server; and the positioning server calculates the position of the positioning tag according toa preset coordinate. By use of the system, low-cost array antenna+Bluetooth can be adopted to realize high-accuracy indoor positioning, and positioning accuracy can be 10cm and is more than 10 timesof pure Bluetooth positioning accuracy. The whole deployment cost of the system is equivalent to Bluetooth positioning, the angle measurement function of the array antenna is used for measuring the direction of a signal emissio