Precise and reliably tracking of players’ position during the action or during the game is important in many sports. Our motivation was to investigate and validate the use of ultra-wideband (UWB) systems for various player and coach applications that depend on tracking the position of the player and possible related events. We developed and implemented a real-time positioning system that allows (a) the validation of UWB positioning and (b) a test application to support tennis game strategy, which monitors the trajectory of players and analyzes their position frequency in different tennis court areas at the moment of ball impact. The accuracy of the UWB positioning system is verified by the professional high-precision optical tracking system Qualisys. The validation of our UWB system, which operates in a dynamic mode in open space, was performed at distances between the devices in the range of 4.7 to 14.9 m. The measured distance errors between the tag and two anchors show mean values of 0.1 cm and 1.8 cm and variances of 14.9 cm and 14.3 cm. The absolute position errors on the tennis court have mean values of 14.2 cm and a variance of 16.1 cm. The position error limits for the confidence intervals of 50%, 90%, and 95% are 10.2 cm, 25.6 cm, and 33.4 cm, respectively. The developed application helps trainers to organize and perform training exercises by providing accurate analysis results that are otherwise very difficult to obtain. At impact, the absolute position error is slightly smaller due to the lower speed of the player; the average measured position error at impact is therefore 11.3 cm. The results of the field tests confirm the usability of the UWB system for position tracking in tennis, as well as in other similar sports applications.

在许多运动中，在动作或比赛中准确，可靠地跟踪玩家的位置很重要。我们的动机是研究和验证超宽带（UWB）系统在各种球员和教练应用中的使用，这些系统依赖于跟踪球员的位置和可能的相关事件。我们开发并实施了实时定位系统，该系统允许（a）验证UWB定位和（b）测试应用程序以支持网球比赛策略，该程序可以监控运动员的运动轨迹并分析他们在不同网球场区域的位置频率球撞击的瞬间。UWB定位系统的准确性已通过专业的高精度光学跟踪系统Qualisys进行了验证。我们对UWB系统的验证，该系统在开放空间中以动态模式运行，设备之间的距离在4.7至14.9 m的范围内进行。标签和两个锚之间的距离误差显示平均值为0.1 cm和1.8 cm，方差为14.9 cm和14.3 cm。网球场上的绝对位置误差的平均值为14.2厘米，方差为16.1厘米。置信区间为50％，90％和95％的位置误差限制分别为10.2 cm，25.6 cm和33.4 cm。通过提供准确的分析结果（否则很难获得），开发的应用程序可帮助培训人员组织和进行培训。撞击时，由于播放器速度降低，绝对位置误差会稍小；因此，撞击时的平均测量位置误差为11.3厘米。