The active badge location system
ACM Transactions on Information Systems (TOIS)
Personal area networks: near-field intrabody communication
IBM Systems Journal
Cyberguide: a mobile context-aware tour guide
Wireless Networks - Special issue: mobile computing and networking: selected papers from MobiCom '96
The anatomy of a context-aware application
Wireless Networks - Selected Papers from Mobicom'99
The smart floor: a mechanism for natural user identification and tracking
CHI '00 Extended Abstracts on Human Factors in Computing Systems
A Novel Broadband Ultrasonic Location System
UbiComp '02 Proceedings of the 4th international conference on Ubiquitous Computing
Multi-Camera Multi-Person Tracking for EasyLiving
VS '00 Proceedings of the Third IEEE International Workshop on Visual Surveillance (VS'2000)
RFID Handbook: Fundamentals and Applications in Contactless Smart Cards and Identification
RFID Handbook: Fundamentals and Applications in Contactless Smart Cards and Identification
Stride and Cadence as a Biometric in Automatic Person Identification and Verification
FGR '02 Proceedings of the Fifth IEEE International Conference on Automatic Face and Gesture Recognition
RFID Information Grid for Blind Navigation and Wayfinding
ISWC '05 Proceedings of the Ninth IEEE International Symposium on Wearable Computers
The cricket indoor location system
The cricket indoor location system
AINAW '07 Proceedings of the 21st International Conference on Advanced Information Networking and Applications Workshops - Volume 02
Smart Carpet: A Footstep Tracking Interface
AINAW '07 Proceedings of the 21st International Conference on Advanced Information Networking and Applications Workshops - Volume 02
Personal and Ubiquitous Computing
The RF in RFID: Passive UHF RFID in Practice
The RF in RFID: Passive UHF RFID in Practice
TileTrack: Capacitive human tracking using floor tiles
PERCOM '09 Proceedings of the 2009 IEEE International Conference on Pervasive Computing and Communications
A proactive space for rehabilitation, gaming and multimodal interaction: a poster presentation
Proceedings of the 13th International MindTrek Conference: Everyday Life in the Ubiquitous Era
A novel concept of a wearable information appliance using context-based human---computer interaction
Personal and Ubiquitous Computing
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In this study, an improved version of the low-frequency indoor location system, with a larger detection range and more durable antenna laminate, is presented. The basic system uses quad antennas, placed under the floor surface, to locate tags with 125-kHz radio signals. The improvements were achieved with a one-layer laminate construction and transmitter electronics that can feed larger currents to the antennas. The measured tag detection height was 2 m, which is adequate for location applications. The low-frequency signal was not affected by normal objects. The tag location reliability of 96.3% was verified with a practical test.