Fundamental bounds on RSS-based wireless localization in passive UHF RFID systems

Author

Ciftler, Bekir Sait ; Kadri, Abdullah ; Guvenc, Ismail

Author_Institution

Dept. of Electr. & Comput. Eng., Florida Int. Univ., Miami, FL, USA

fYear

2015

fDate

9-12 March 2015

Firstpage

1356

Lastpage

1361

Abstract

Radio-Frequency IDentification (RFID) systems carry critical importance for reaping the benefits of a diverse set of applications that will be enabled by the emerging Internet of Things (IoT). In particular, RFID based position estimation and tracking will facilitate a wide array of location based services. Considering a monostatic RFID configuration with a three dimensional antenna radiation pattern, this paper investigates the limits of localization accuracy for received signal strength (RSS) based wireless localization using passive UHF RFID systems. The Cramer-Rao Lower Bound (CRLB) for the localization accuracy are derived, and are compared with the localization accuracy of maximum likelihood estimators for various RFID antenna topologies. Numerical results show that due to the directional antenna pattern used in RFID systems, the localization accuracy can degrade at blind locations that remain outside of the RFID readers´ main beam patterns.Cramer-Rao Lower Bound (CRLB) for the localization accuracy are derived, and are compared with the localization accuracy of maximum likelihood estimators for various RFID antenna topologies. Numerical results show that due to the directional antenna

Keywords

Internet of Things; RSSI; UHF antennas; antenna radiation patterns; directive antennas; maximum likelihood estimation; radiofrequency identification; radionavigation; 3D antenna radiation pattern; CRLB; Cramer-Rao lower bound; Internet of Things; IoT; RFID based position estimation; RFID reader; RSS-based wireless localization; beam pattern; blind location; directional antenna pattern; localization accuracy; location based services; maximum likelihood estimation; monostatic RFID configuration; passive UHF RFID system; radiofrequency identification; received signal strength; Accuracy; Antenna radiation patterns; Maximum likelihood estimation; Passive RFID tags; Beamforming; CRLB; IoT; RFID; localization; maximum likelihood estimation; position estimation; radiation pattern;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference (WCNC), 2015 IEEE

Conference_Location

New Orleans, LA

Type

conf

DOI

10.1109/WCNC.2015.7127666

Filename

7127666