Unobtrusive long-range detection of passive RFID tag motion

被引：37
|
作者：
Jiang, B [1 ]
Fishkin, KP
Roy, S
Philipose, M
机构：
[1] Univ Washington, Dept Elect Engn, Seattle, WA 98195 USA
[2] Intel Res Seattle, Seattle, WA 98105 USA
来源：
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2006年 / 55卷 / 01期
关键词：
movement detection; passive tags; radiofrequency identification (RFID); radio-frequency (RF)-signal processing; response rate;
D O I：
10.1109/TIM.2005.861489
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper presents a novel method for detecting the motion of passive radio-frequency-identification (RFID) tags within the field of a detecting antenna. The method allows the unobtrusive detection of human interactions with RFID-tagged objects without requiring any modifications to existing communications protocols or RFID hardware. We use the response rate (a metric in lieu of the true received RF-signal intensity) at the reader to study the impact of tag translation, rotation, and coupling, as well as environmental effects. Performance is improved by introducing the idea of multiple tags/readers. Movement detection algorithms are developed and integrated into the RFID monitoring system, and verified by experiments that demonstrate excellent results.
引用
收藏
页码：187 / 196
页数：10
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