Research on Indoor Positioning System Based on UWB Technology

This paper proposes the research of high-precision indoor positioning system based on UWB. Compared with traditional indoor wireless positioning technology, this technology has the function of providing high-precision positioning information for multiple positioning points in real time at the same time. First use UWB ultra-wideband technology to calculate the position distance based on the time difference of signal pulses sent between each base station and the tag, and then obtain the original position of the tag according to the TDOA position algorithm; Then in this paper, a sliding window filtering (also known as recursive average filtering) algorithm is used to filter the original data to obtain more accurate positioning data, and the accuracy can be improved to the centimeter level. Finally, in this paper, a positioning experiment on a stroller in a shopping mall is performed. The results show that the positioning error can be controlled within a range of 20 cm.