Title :
Two-dimension localization of passive RFID tags using AOA estimation
Author :
Zhou, Junru ; Zhang, Hongjian ; Mo, Lingfei
Author_Institution :
Dept. of Control Sci. & Eng., Zhejiang Univ., Hangzhou, China
Abstract :
RFID is widely used in electronic identification and tracking. Both identity and location information are important in object tracking applications. Recent techniques in RFID localization generally use active tags and pay attention to RSS (received signal strength). As the signal processing of passive RFID is more complicated, RSS based localization of passive tags has a high error. Note that phase characteristics play an important role in signal propagation. This paper presents a method to locate passive RFID tags by estimating AOA (angle of arrival) using the phase difference. Modelling and experimental results show that AOA estimation by phase difference can be used to locate RFID tags accurately.
Keywords :
direction-of-arrival estimation; object tracking; radiofrequency identification; signal processing; AOA estimation; RSS; angle of arrival estimation; electronic identification; electronic tracking; object tracking application; passive RFID tag; passive radiofrecrency identifιcation tag; phase difference; received signal strength; signal processing; signal propagation; two-dimension localization; Antenna measurements; Antennas; Backscatter; Equations; RFID tags; angle of arrival(AOA); passive tag; phase difference; radio frecrency identification(RFID); tag localization;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC), 2011 IEEE
Conference_Location :
Binjiang
Print_ISBN :
978-1-4244-7933-7
DOI :
10.1109/IMTC.2011.5944170
