Abstract
This paper presents a novel Real-Time Localisation System (RTLS) based upon 2.45 GHz Surface Acoustic Wave (SAW) Radio Frequency Identification (RFID) systems. The system utilises a novel localisation method that combines the angular rotation of the RFID reader's antenna system with the inherent Time-of-Flight (TOF) distance measurement capabilities of the SAW RFID system. The system design rests upon the sound physical fundamentals of electromagnetic radiation and SAW operation. The system was implemented and empirically evaluated. It was determined to provide accurate 2-Dimensional (2D) location of the SAW tag that is within 3.17 cm of the actual location for a reader to tag range of up to 10 m.
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