LANDMARC: indoor location sensing using active RFID
Wireless Networks - Special issue: Pervasive computing and communications
Random Sampling Algorithm in RFID Indoor Location System
DELTA '06 Proceedings of the Third IEEE International Workshop on Electronic Design, Test and Applications
An Indoor Localization Mechanism Using Active RFID Tag
SUTC '06 Proceedings of the IEEE International Conference on Sensor Networks, Ubiquitous, and Trustworthy Computing -Vol 1 (SUTC'06) - Volume 01
R-LIM: an Affordable Library Search System Based on RFID
ICHIT '06 Proceedings of the 2006 International Conference on Hybrid Information Technology - Volume 01
Perspectives on Projective Geometry: A Guided Tour Through Real and Complex Geometry
Perspectives on Projective Geometry: A Guided Tour Through Real and Complex Geometry
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In this paper, we propose an indoor localisation system using radio frequency identification RFID technology. Locations of passive RFID tags are determined by scanning multiple RFID reader antennas' radiation beams. During each scan, the horizontal and elevation angles of the reader antenna are recorded when the transition of a tag entering or leaving the antenna beam's coverage area occurs, and this angle information is used in the developed algorithm to calculate the tag's location. The proposed system requires a minimum of two reader antennas, without the need for reference tags. In order to mitigate the multipath impact on the localisation accuracy and system coverage, an improved algorithm is also developed. Simulations are performed for a typical small indoor environment and validated by experiments using ultra-high frequency UHF RFID devices. The results demonstrate that for effective operations of the proposed system, directive antennas are necessary, and systems using antennas with narrower beam widths provide a higher localisation accuracy.