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Technical University of Crete
Technical University of Crete
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| URI | http://purl.tuc.gr/dl/dias/9E1CBBE8-F3BB-4519-BAF2-F79F0E2D5545 | - |
| Identifier | https://doi.org/10.1109/TCOMM.2021.3077942 | - |
| Identifier | https://ieeexplore.ieee.org/document/9424605 | - |
| Language | en | - |
| Extent | 12 pages | en |
| Title | Asynchronous reception of 2 RFID tags | en |
| Creator | Skyvalakis Konstantinos | en |
| Creator | Σκυβαλακης Κωνσταντινος | el |
| Creator | Bletsas Aggelos | en |
| Creator | Μπλετσας Αγγελος | el |
| Publisher | Institute of Electrical and Electronics Engineers | en |
| Content Summary | Commercial 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 Item | Peer-Reviewed Journal Publication | en |
| Type of Item | Δημοσίευση σε Περιοδικό με Κριτές | el |
| License | http://creativecommons.org/licenses/by/4.0/ | en |
| Date of Item | 2022-10-21 | - |
| Date of Publication | 2021 | - |
| Subject | Asynchronous detection | en |
| Subject | Symbol synchronization | en |
| Subject | Viterbi | en |
| Subject | FM0 | en |
| Subject | RFID | en |
| Subject | Gen2 | en |
| Bibliographic Citation | K. 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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