RF-Mirror: Mitigating Mutual Coupling Interference in Two-Tag Array Labeled RFID Systems

Wang, Z; Xu, M; Ye, N; Huang, H; Wang, R; Xiao, F

RF-Mirror: Mitigating Mutual Coupling Interference in Two-Tag Array Labeled RFID Systems

Wang, Z

Xu, M

Ye, N Huang, H Wang, R Xiao, F

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Publisher:: IEEE
Publication Type:: Conference Proceeding
Citation:: Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks workshops, 2020, 00
Issue Date:: 2020-06-01

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Field	Value	Language
dc.contributor.author	Wang, Z https://orcid.org/0000-0003-3611-9540
dc.contributor.author	Xu, M https://orcid.org/0000-0001-9581-8849
dc.contributor.author	Ye, N
dc.contributor.author	Huang, H
dc.contributor.author	Wang, R
dc.contributor.author	Xiao, F
dc.date	2020-06-22
dc.date.accessioned	2021-06-04T05:22:57Z
dc.date.available	2021-06-04T05:22:57Z
dc.date.issued	2020-06-01
dc.identifier.citation	Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks workshops, 2020, 00
dc.identifier.isbn	9781728166308
dc.identifier.issn	2155-5486
dc.identifier.issn	2155-5494
dc.identifier.uri	http://hdl.handle.net/10453/149417
dc.description.abstract	Recent RFID systems start attaching a tag array consisting of two or more tags on an object to deal with polarization mismatch and RF phase periodicity for battery-free sensing and localization. The multi-tag solution can also provide target orientation estimation. However, when these tags are closely spaced apart, mutual coupling will be induced, producing the unexpected changes in reported RSSI and RF phase. In this paper, we present RF-Mirror that enables compensating the distortion in a two-tag array labeled RFID system. The system would output the accurate difference in tag-to-antenna distances between two tags, which is a fundamental parameter in previous works for use. Firstly, we model the backscatter signal of a responding tag in a two-tag scenario, and then formulate novel RSSI- and RF phase-distance models with coupling terms. Secondly, we design an algorithm to characterize the coupling effect on tag gain by fusing RSSI and RF phase. Thirdly, we design a decoupling algorithm based on an observation that tag mutual coupling is independent of the position of a tag array relative to a reader antenna. Our experiments show the effectiveness of our models and RF-Mirror achieves the decoupling error of 0.197 cm in calculating the tag-to-antenna distance difference.
dc.language	en
dc.publisher	IEEE
dc.relation.ispartof	Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks workshops
dc.relation.ispartof	17th Annual IEEE International Conference on Sensing, Communication and Networking (IEEE SECON)
dc.relation.ispartofseries	IEEE International Conference on Sensing Communication and Networking
dc.relation.isbasedon	10.1109/SECON48991.2020.9158443
dc.rights	info:eu-repo/semantics/closedAccess
dc.title	RF-Mirror: Mitigating Mutual Coupling Interference in Two-Tag Array Labeled RFID Systems
dc.type	Conference Proceeding
utslib.citation.volume	00
utslib.location.activity	ELECTR NETWORK
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - INEXT - Innovation in IT Services and Applications
pubs.organisational-group	/University of Technology Sydney/Strength - GBDTC - Global Big Data Technologies
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2021-06-04T05:22:40Z
pubs.finish-date	2020-06-25
pubs.publication-status	Published
pubs.start-date	2020-06-22
pubs.volume	00

Abstract:

Recent RFID systems start attaching a tag array consisting of two or more tags on an object to deal with polarization mismatch and RF phase periodicity for battery-free sensing and localization. The multi-tag solution can also provide target orientation estimation. However, when these tags are closely spaced apart, mutual coupling will be induced, producing the unexpected changes in reported RSSI and RF phase. In this paper, we present RF-Mirror that enables compensating the distortion in a two-tag array labeled RFID system. The system would output the accurate difference in tag-to-antenna distances between two tags, which is a fundamental parameter in previous works for use. Firstly, we model the backscatter signal of a responding tag in a two-tag scenario, and then formulate novel RSSI- and RF phase-distance models with coupling terms. Secondly, we design an algorithm to characterize the coupling effect on tag gain by fusing RSSI and RF phase. Thirdly, we design a decoupling algorithm based on an observation that tag mutual coupling is independent of the position of a tag array relative to a reader antenna. Our experiments show the effectiveness of our models and RF-Mirror achieves the decoupling error of 0.197 cm in calculating the tag-to-antenna distance difference.

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http://hdl.handle.net/10453/149417