NDLI: Radio frequency-based personnel location systems

Content Provider	IEEE Xplore Digital Library
Author	Christ, R. Lavigne, R.
Copyright Year	2000
Description	Author affiliation: Dominion Wireless Inc. (Christ, R.)
Abstract	This paper presents the technologies available to locate the origin of radio frequency transmissions for Personnel Location Systems. The development and application of these systems will be discussed. A new class of signal strength location systems will be introduced that sets the standard for locating accuracy in indoor and campus environments. Many technologies have been applied to locating radio signals. Early radio frequency location systems used mechanically-rotated directional antennas or pseudo-Doppler array techniques. They were developed for outdoor use over relatively long ranges. The reliability and accuracy fall short of today's personnel location requirements that demand both indoor and outdoor coverage of large building campuses. Ubiquitous Global Positioning System (G.P.S.) service delivers reliable radio frequency location in outdoor areas. Differential G.P.S. provides sufficient accuracy for most outdoor personnel tracking applications. Recent cost reductions in OEM-grade G.P.S. receiver printed circuit assemblies have made G.P.S. solutions economically feasible for outdoor personnel location. Bi-directional LEOs-based satellite location systems are under development that also can be applied to personnel location. Various users have attempted to locate transmitters using relative time of arrival (TOA) algorithms, with mixed results. Ultrawideband (UWB) technology, offers the potential for accurate RF location indoors and out but FCC concerns with potential interference to GPS services are preventing approval. The most accurate radio frequency location systems operational within the security industry today employ relative signal strength to calculate position. Recent advances in signal strength modeling software and search algorithms have extended the accuracy of signal strength locating systems. These advances have been incorporated into the FLARE/sup TM/ system developed by Dominion Wireless. Originally designed to meet specifications developed by Correctional Service Canada, the FLARE signal strength locating system has now been adopted by other corrections authorities in the United States and Canada. The theory of operation of FLARE will be presented. Current implementations will be discussed and the capabilities and limitations of actual deployed systems will be reviewed. Finally, the future plans for the refinement and advancement of FLARE will be presented and projections of enhanced performance will be supplied.
Starting Page	141
Ending Page	150
File Size	1091625
Page Count	10
File Format	PDF
ISBN	0780359658
DOI	10.1109/CCST.2000.891180
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-10-25
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radio frequency Personnel Global Positioning System Directional antennas Antenna arrays Costs Receivers Printed circuits Assembly Environmental economics
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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