IoT Localization for Bistatic Passive UHF RFID Systems With 3-D Radiation Pattern

被引：38

作者：

Ciftler, Bekir Sait ^{[1
]}

Kadri, Abdullah ^{[2
]}

Guevenc, Ismail ^{[3
]}

机构：

[1] Florida Int Univ, Dept Elect & Comp Engn, Miami, FL 33174 USA

[2] Qatar Univ, Qatar Mobil Innovat Ctr, Doha 210531, Qatar

[3] North Carolina State Univ, Dept Elect & Comp Engn, Raleigh, NC 27695 USA

来源：

IEEE INTERNET OF THINGS JOURNAL | 2017年 / 4卷 / 04期

基金：

美国国家科学基金会;

关键词：

Beamforming; bistatic; Cramer-Rao lower bound (CRLB); Internet of Things (IoT); localization; maximum likelihood estimation; monostatic; position estimation; public safety; radiation pattern; ultra high frequency (UHF) radio-frequency identification (RFID); INTERNET; TRACKING; THINGS;

D O I：

10.1109/JIOT.2017.2699976

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Passive radio-frequency identification (RFID) systems carry critical importance for Internet of Things (IoT) applications due to their energy harvesting capabilities. RFIDbased position estimation, in particular, is expected to facilitate a wide array of location-based services for IoT applications with low-power requirements. In this paper, considering monostatic and bistatic configurations and 3-D antenna radiation pattern, we investigate the accuracy of received signal strength-based wireless localization using passive ultra high frequency RFID systems. The Cramer-Rao lower bound (CRLB) for the localization accuracy is derived, and is compared with the accuracy of maximum likelihood estimators for various RFID antenna configurations. Numerical results show that due to RFID tag/antenna sensitivity, and the directional antenna pattern, the localization accuracy can degrade at blind locations that remain outside of the RFID reader antennas' main beam patterns. In such cases optimizing elevation angle of antennas are shown to improve localization coverage, while using bistatic configuration improves localization accuracy significantly.

引用

页码：905 / 916

页数：12

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