Device and method for positioning angle of signal arrival and measuring wave-path difference of signal

The invention relates to a positioning method in short range or indoor space and a system thereof, more particularly to a device and a method for positioning angle of signal arrival and measuring wave-path difference of signal. In order to provide the positioning method and the system thereof capable of offsetting the variation generated by an inference signal and greatly enhancing positioning precision, the technical proposal adopted in the invention is that: the device comprises an antenna for transmitting instruction radio frequency signals and receiving the radio frequency signals transmitted by responders; a transmitter for transmitting a responder communication instruction; a receiver for receiving the radio frequency signals transmitted by the responders and processing the signals; an AD converter for implementing uniform cycle sampling on baseband sine wave output by the receiver and converting voltage values of sampling into numerical codes with certain precision and sending the numerical codes to a computer for being processed; and a terminal processing computer for inputting pre-coded wave-path difference measurement algorithmic routine and coordinates positioning algorithmic routine, and outputting the coordinates of the responders through a display. The device and the method are mainly applied to the positioning in short range or indoor space.