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Asynchronous reception of 2 RFID tags

Skyvalakis Konstantinos, Bletsas Aggelos

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URIhttp://purl.tuc.gr/dl/dias/9E1CBBE8-F3BB-4519-BAF2-F79F0E2D5545-
Identifierhttps://doi.org/10.1109/TCOMM.2021.3077942-
Identifierhttps://ieeexplore.ieee.org/document/9424605-
Languageen-
Extent12 pagesen
TitleAsynchronous reception of 2 RFID tagsen
CreatorSkyvalakis Konstantinosen
CreatorΣκυβαλακης Κωνσταντινοςel
CreatorBletsas Aggelosen
CreatorΜπλετσας Αγγελοςel
PublisherInstitute of Electrical and Electronics Engineersen
Content SummaryCommercial radio frequency identification (RFID) readers have to resolve collisions between tags, without sacrificing throughput. This work proposes a Viterbi joint sequence detector as well as a 2-symbol joint tag information detector that can resolve a collision between two tags in the physical layer. In sharp contrast to prior art, the proposed closed-form signal model takes into account the asynchrony level between the two collided tag responses, which is not uncommon with commercial, low-cost RFID tags that follow industry’s Gen2 protocol. The asynchrony is considered as the time offset τ between the beginnings of the two tags’ responses and is modeled through a derived shaping matrix that depends on the delayed tag information. Performance evaluation of the proposed detectors with simulated data under Ricean fading, as well as experimental data with software-defined radio, reveals improved performance compared to prior art, under various operating regimes. It is also shown that for different values of the parameter τ , BER does not present a monotonic behaviour. As a collateral dividend, it is found that clustering techniques on the filtered received signal should explicitly take into account the time offset τ , since the latter modifies the number of observed clusters.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2022-10-21-
Date of Publication2021-
SubjectAsynchronous detectionen
SubjectSymbol synchronizationen
SubjectViterbien
SubjectFM0en
SubjectRFIDen
SubjectGen2en
Bibliographic CitationK. Skyvalakis and A. Bletsas, "Asynchronous reception of 2 RFID tags," IEEE Trans. Commun., vol. 69, no. 8, pp. 5243-5254, Aug. 2021, doi: 10.1109/TCOMM.2021.3077942.en

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