Research on UWB-Based Indoor Ranging Positioning Technology

Abstract

In recent years, with the development of the Internet and Internet of Things technology, people's demand for high-precision indoor positioning technology is increasing. The traditional ranging positioning methods (such as Bluetooth, ultrasound, GPS, etc.) have some limitations. In this paper, an indoor location ranging method based on UWB technology, TOA and TOF principle is proposed. UWB is widely used in high-precision indoor positioning because of its strong anti-interference performance, high transmission rate, wide bandwidth, low power consumption, and low transmission power. An inverse star location model was established based on the principle of spatial 4-point location. This scheme adopts STM32 to control DW1000 to realize the UWB signal to receive and dispatch on the hardware. The software algorithm uses the TOA and TOF principles combined with the spatial 4-point positioning method to determine the location of the target point. In addition, the accuracy of the system was tested and corrected through experiments, which further improved the system accuracy.