D-Watch: Embracing “bad” multipaths for device-free localization with COTS RFID devices

Device-free localization, which does not require any device attached to the target, is playing a critical role in many applications, such as intrusion detection, elderly monitoring and so on. This paper introduces D-Watch, a device-free system built on the top of low cost commodity-off-the-shelf RFI...

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Main Authors: WANG, Ju, XIONG, Jie, JIANG, Hongbo, CHEN, Xiaojiang, FANG, Dingyi
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Language:English
Published: Institutional Knowledge at Singapore Management University 2017
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AoA
Online Access:https://ink.library.smu.edu.sg/sis_research/3840
https://ink.library.smu.edu.sg/context/sis_research/article/4842/viewcontent/08048021.pdf
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spelling sg-smu-ink.sis_research-48422020-04-07T05:23:34Z D-Watch: Embracing “bad” multipaths for device-free localization with COTS RFID devices WANG, Ju XIONG, Jie JIANG, Hongbo CHEN, Xiaojiang FANG, Dingyi Device-free localization, which does not require any device attached to the target, is playing a critical role in many applications, such as intrusion detection, elderly monitoring and so on. This paper introduces D-Watch, a device-free system built on the top of low cost commodity-off-the-shelf RFID hardware. Unlike previous works which consider multipaths detrimental, D-Watch leverages the ''bad'' multipaths to provide a decimeter-level localization accuracy without offline training. D-Watch harnesses the angle-of-arrival information from the RFID tags' backscatter signals. The key intuition is that whenever a target blocks a signal's propagation path, the signal power experiences a drop which can be accurately detected by the proposed novel P-MUSIC algorithm. The proposed wireless phase calibration scheme does not interrupt the ongoing data communication and thus reduces the deployment burden. We implement and evaluate D-Watch with extensive experiments in three different environments. D-Watch achieves a median accuracy of 16.5 cm for library, 25.5 cm for laboratory, and 31.2 cm for hall environment, outperforming the state-of-the-art systems. In a table area of 2 m$x$2 m, D-Watch can track a user's fist at a median accuracy of 5.8 cm. D-Watch is also capable of localizing multiple targets which is well known to be challenging in passive localization. 2017-12-01T08:00:00Z text application/pdf https://ink.library.smu.edu.sg/sis_research/3840 info:doi/10.1109/TNET.2017.2747583 https://ink.library.smu.edu.sg/context/sis_research/article/4842/viewcontent/08048021.pdf http://creativecommons.org/licenses/by-nc-nd/4.0/ Research Collection School Of Computing and Information Systems eng Institutional Knowledge at Singapore Management University Antennas AoA Calibration Device-free localization Estimation multipath Multiple signal classification RFID tags Target tracking Intrusion detection Target tracking Watches Commodity off the shelves Device-free localizations Localization accuracy Multipath Multiple signal classification Passive localization RF-ID tags State-of-the-art system Radio frequency identification (RFID) Databases and Information Systems Software Engineering
institution Singapore Management University
building SMU Libraries
continent Asia
country Singapore
Singapore
content_provider SMU Libraries
collection InK@SMU
language English
topic Antennas
AoA
Calibration
Device-free localization
Estimation
multipath
Multiple signal classification
RFID tags
Target tracking
Intrusion detection
Target tracking
Watches
Commodity off the shelves
Device-free localizations
Localization accuracy
Multipath
Multiple signal classification
Passive localization
RF-ID tags
State-of-the-art system
Radio frequency identification (RFID)
Databases and Information Systems
Software Engineering
spellingShingle Antennas
AoA
Calibration
Device-free localization
Estimation
multipath
Multiple signal classification
RFID tags
Target tracking
Intrusion detection
Target tracking
Watches
Commodity off the shelves
Device-free localizations
Localization accuracy
Multipath
Multiple signal classification
Passive localization
RF-ID tags
State-of-the-art system
Radio frequency identification (RFID)
Databases and Information Systems
Software Engineering
WANG, Ju
XIONG, Jie
JIANG, Hongbo
CHEN, Xiaojiang
FANG, Dingyi
D-Watch: Embracing “bad” multipaths for device-free localization with COTS RFID devices
description Device-free localization, which does not require any device attached to the target, is playing a critical role in many applications, such as intrusion detection, elderly monitoring and so on. This paper introduces D-Watch, a device-free system built on the top of low cost commodity-off-the-shelf RFID hardware. Unlike previous works which consider multipaths detrimental, D-Watch leverages the ''bad'' multipaths to provide a decimeter-level localization accuracy without offline training. D-Watch harnesses the angle-of-arrival information from the RFID tags' backscatter signals. The key intuition is that whenever a target blocks a signal's propagation path, the signal power experiences a drop which can be accurately detected by the proposed novel P-MUSIC algorithm. The proposed wireless phase calibration scheme does not interrupt the ongoing data communication and thus reduces the deployment burden. We implement and evaluate D-Watch with extensive experiments in three different environments. D-Watch achieves a median accuracy of 16.5 cm for library, 25.5 cm for laboratory, and 31.2 cm for hall environment, outperforming the state-of-the-art systems. In a table area of 2 m$x$2 m, D-Watch can track a user's fist at a median accuracy of 5.8 cm. D-Watch is also capable of localizing multiple targets which is well known to be challenging in passive localization.
format text
author WANG, Ju
XIONG, Jie
JIANG, Hongbo
CHEN, Xiaojiang
FANG, Dingyi
author_facet WANG, Ju
XIONG, Jie
JIANG, Hongbo
CHEN, Xiaojiang
FANG, Dingyi
author_sort WANG, Ju
title D-Watch: Embracing “bad” multipaths for device-free localization with COTS RFID devices
title_short D-Watch: Embracing “bad” multipaths for device-free localization with COTS RFID devices
title_full D-Watch: Embracing “bad” multipaths for device-free localization with COTS RFID devices
title_fullStr D-Watch: Embracing “bad” multipaths for device-free localization with COTS RFID devices
title_full_unstemmed D-Watch: Embracing “bad” multipaths for device-free localization with COTS RFID devices
title_sort d-watch: embracing “bad” multipaths for device-free localization with cots rfid devices
publisher Institutional Knowledge at Singapore Management University
publishDate 2017
url https://ink.library.smu.edu.sg/sis_research/3840
https://ink.library.smu.edu.sg/context/sis_research/article/4842/viewcontent/08048021.pdf
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