Real-Time Position Tracking of Indoor Games Player Based on Radio Frequency (RF) and Ultrasonic (US)

In this paper, we have proposed a low-cost position tracking system for track indoor game players using minimal infrastructures with cost effective electronic components. Various positioning systems were introduced in previous to track game players, but they have complication due to time synchronization. To overcome this problem the proposed positioning system is constructed by using Ultrasonic (US) and Radio frequency (RF). This system uses open-source platforms with good user-friendly interface software, so the system can be operated by a user without prior knowledge of it. The system has two segments, which are transmitting unit and receiver unit. The transmitting unit has one RF transmitter and one ultrasonic Transmitter. The receiver unit has one RF receiver and three ultrasonic receivers. In this system the arduino module used to control the components and calculate the position estimation. The proposed system is using the theory of time difference of arrival for range measuring. The performance limitation of the system was also analyzed experimentally, such as a single range and positional accuracy in 2D & 3D space. Based on the results of analysis, major changes and substitutes in the circuits will improve the accuracy and performance limitation of the system such as making the circuits with high quality ICs & ultrasonic transducers, implementation of high pass or band pass filters in receiver circuits and integrating the receiver circuits with voltage regulators.