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In this work, we identify RFID tags based on their inherent signal features, which can be another level of security on top of the traditional way of demonstrating knowledge of a secret key. Identification is the process of discovering the true identity of an entity from the entire collection of similar entities and requires one-to-many matching. Passive UHF RFID tags are identified by their signal...
A wide area and error free ultra high frequency (UHF) radio frequency identification (RFID) interrogation system based on the use of multiple antennas used in cooperation to provide high quality ubiquitous coverage, is presented. The system uses an intelligent distributed antenna system (DAS) whereby two or more spatially separated transmit and receive antenna pairs are used to allow greatly improved...
This paper introduces a real-time localization system (RTLS) using efficient multiple propagation models to compensate for the drawback of the received signal strength technique. The RTLS is implemented on an active RFID system and uses received signal strength measurements and reference tags for ranging. The RTLS is implemented purely in software that post processes the received signal strength data...
Automatic goods inventory on the shelf is an important Ultra High Frequency (UHF) Radio Frequency Identification (RFID) application. Compared to other applications, it has some unique requirements: 1) Confined read region to avoid the cross reads to other tiers and shelves; 2) Positioning capability to know where along the shelf the tag is; 3) Low total system cost to support many shelves in the application...
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