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• W1569613094 abstract "In this poster submission we present a high-level overview of a radio-based sensor system for tracking participants and equipment in ball games. We state the motivation for building such a system and describe the individual components in brief. We conclude by discussing the research challenges and the general applicability of the tracking system. MOTIVATION AND OBJECTIVES The state-of-the art sports tracking technology is largely based on severely limited video image processing. Inspired by advances in the field of real-time sensor data gathering, this proposal addresses the tracking issue by using radiobased sensors to deliver true real-time performance. The objectives of the system discussed are as follows: • to provide a system for real-time radio-based accurate tracking of the position of the ball or other equipment and of the players in team ball games; to extend the system to measure physiological signals such as heart rate, blood pressure and body orientation; • to communicate the tracked data securely and reliably in real-time to an interpreting component of the system; • to process the tracked data in real-time and determine the occurrence and order of pre-defined significant events (i.e., a particular action by a particular player); • to analyze and visualize the processed data, to instantaneously react to predefined events (e.g. signal an offside event to a referee) and to make the data available to further user applications; The possible applications include, among others: • improving refereeing decisions by delivering automated real-time game rules evaluation; • improving coaching decisions by supplying detailed realtime statistics about the games’ participants; • improving the spectator experience by displaying detailed immediate game statistics and enabling the spectator to take the participants’ perspective of the game; • improving media broadcasts on sports events by supplying real-time statistics and enabling immediate detailed analysis of the game’s events. SKETCH OF THE MODULAR SYSTEM DESCRIPTION The design of the proposed tracking system is divided into three groups of modules, the back-end, the processing units and the front-end (see Figure 1). Back-end The sports venue, players and the ball are instrumented with radio-based devices (mix of r.f. ‘tags’, transmitters and receivers), which are used to estimate distances (ranges) between devices. Various techniques can be used to measure ranges, including the Time of Arrival (TOA) and Differential Time of Arrival (DTOA) [1] of signals transmitted from the devices. The ultra wide band (UWB) radio sensor module provides distance estimates between the radio devices. Processing Units Instantaneous position and its high-order derivatives (e.g. velocity and acceleration) can be calculated from the set of distance estimates received from the UWB Radio Sensor module. Exactly how the (x,y,z) position at time t may be computed is under investigation. Techniques that use Bayesian [2] or Kalman [3] filtering or distributed location protocols based on orthogonal triangularization [4] have been proposed recently. Football players can travel up to 10 m/s, so finding the trade-off between position uncertainty, velocity and accuracy is a challenge. Different ball games have different characteristics. Events occurring in football matches, for instance, may be unrelated to the ones observed in rugby. A domain knowledge-base module stores the semantics of a particular ball game. Such a database is useful for detecting game actions from the observed data. In a football match, for instance, the event of a free-kick may be followed by the action of ‘goalkeeper jump’. A rule-based technique is introduced in [5], where football events are checked against event-rule specifications. Front-end Real-time visualization of the processed data enables immediate detailed analysis of the game. Other real-time tools assist the decision-making process of coaching and refereeing. Further modules present data such as match statistics and instant replays to the users of the system (spectators, broadcasters)." @default.
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• W1569613094 date "2006-07-01" @default.
• W1569613094 modified "2023-09-25" @default.
• W1569613094 title "A System for Radio Tracking of Team-Sports Players" @default.
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