In this paper,the implementation of high precision positioning using impulse radio-ultra wideband is studied. Firstly,an all-digital transmitter based onfield programmable gate array board is proposed,which generates and outputs pulse signals from its I/O port.Then,the pulse signal is received by the receiving antenna and amplified by the low noise amplifier on each receiving branch.Thepulse signal is converted into a1-bit digital sample by a comparison algorithm. In order to reduce the noise power,the digitized samples are averaged according to the corresponding phase of the pulse frame,and the averaged pulse samples are correlated with the template signal,and the correlator output is compared with a threshold.The receiver estimates the timing of the pulse signal by detecting the correlatoroutput that exceeds the threshold.Finally,the processing unit estimates the position of the transmitter by the one way ranging-time difference of arrival method.The experimental results not only verify the effectiveness of the proposed positioning system,but also show that the proposed positioning system has a 41.48%and 23.11%increase in the positioning RMS error of transmitter and the RMS error of modal value,respectively,compared with the traditional receiver processing system based on an analog-to-digital converter.