Two-dimension localization of passive RFID tags using AOA estimation

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 passi...

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Main Authors: Junru Zhou, Hongjian Zhang, Lingfei Mo
Format: Conference Proceeding
Language:English
Subjects:
angle of arrival(AOA)
Antenna measurements
Antennas
Backscatter
Equations
passive tag
phase difference
radio frecrency identification(RFID)
RFID tags
tag localization
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Hongjian Zhang
Lingfei Mo
description 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.
doi_str_mv 10.1109/IMTC.2011.5944170
format conference_proceeding
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source IEEE Electronic Library (IEL) Conference Proceedings
subjects angle of arrival(AOA)
Antenna measurements
Antennas
Backscatter
Equations
passive tag
phase difference
radio frecrency identification(RFID)
RFID tags
tag localization
title Two-dimension localization of passive RFID tags using AOA estimation
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