1.School of Electrical and Control Engineering,North University of China,Taiyuan 030051,China
2.State Key Laboratory of Extreme Environment Optoelectronic Dynamic Measurement Technology and Instrument,North University of China,Taiyuan 030051,China
3.Technology Innovation Center of Shanxi Provincial for Intelligent Microwave Photoelectric,North University of China,Taiyuan 030051,China
4.National Key Laboratory of Intelligent Sensing Functional Materials,Tianjin University,Tianjin 300072,China
5.School of Physical Education,North University of China,Taiyuan 030051,China
Aiming at the problem that it is difficult to monitor the movement parameters of athletes and the team as a whole in real time and accurately during daily football training and competitions, a portable high-precision positioning system based on UWB wireless technology is proposed. The Kalman filtering and weighted least squares algorithms are used in this system to calculate ranging information for positioning. In the standard football field environment, the horizontal dilution of precision is used to discriminate and select the base station layout scheme, and the weighted least squares method is adopted to calculate the tag position. On this basis, the base station clock error model is analyzed, and error compensation algorithms are used to reduce manual layout errors and clock synchronization intervals, increase tag capacity, and reduce system power consumption. Simulation and experimental verification show that the static positioning error is ≤15 cm, the dynamic positioning error is ≤20 cm, the clock synchronization interval can be increased to 2 s, and the personnel capacity is ≥20 cm. This technology improves the availability and reliability of the portable high-precision positioning system.
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