Ιδρυματικό Αποθετήριο
Πολυτεχνείο Κρήτης
Πολυτεχνείο Κρήτης
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| URI | http://purl.tuc.gr/dl/dias/4560BCC7-819C-4E8D-8FB5-47EE9EF4CEF6 | - |
| Αναγνωριστικό | https://doi.org/10.1109/TWC.2022.3222733 | - |
| Αναγνωριστικό | https://ieeexplore.ieee.org/document/9961233 | - |
| Γλώσσα | en | - |
| Μέγεθος | 13 pages | en |
| Τίτλος | Intelligently wireless batteryless RF-powered reconfigurable surface: theory, implementation & limitations | en |
| Δημιουργός | Vardakis Iosif | en |
| Δημιουργός | Βαρδακης Ιωσηφ | el |
| Δημιουργός | Kotridis Georgios | en |
| Δημιουργός | Κοτριδης Γεωργιος | el |
| Δημιουργός | Peppas Spyridon | en |
| Δημιουργός | Πεππας Σπυριδων | el |
| Δημιουργός | Skyvalakis Konstantinos | en |
| Δημιουργός | Σκυβαλακης Κωνσταντινος | el |
| Δημιουργός | Vougioukas Georgios | en |
| Δημιουργός | Βουγιουκας Γεωργιος | el |
| Δημιουργός | Bletsas Aggelos | en |
| Δημιουργός | Μπλετσας Αγγελος | el |
| Εκδότης | Institute of Electrical and Electronics Engineers | en |
| Περιγραφή | This work was supported by the Hellenic Foundation for Research and Innovation (H.F.R.I.) under the “First Call for H.F.R.I. Research Projects through the Faculty Members and Researchers and the Procurement of High-Cost Research Equipment” under Project 2846. An earlier version of this paper was presented at the IEEE GLOBECOM, Madrid, Spain, December 2021 [DOI: 10.1109/GLOBECOM46510.2021.9685256]. | en |
| Περίληψη | This work exploits ultra-low cost, commodity, radio frequency identification (RFID) tags as elements of a reconfigurable intelligent surface (RIS). Such batteryless tags are powered and controlled by a software-defined radio reader, with properly modified software, so that a source-destination link is assisted, operating at a different band. Signal model includes small-scale and large-scale fading, direct link, as well as specific parameters relevant to reflection (i.e., backscatter) radio, such as antenna structural mode and reflection efficiency, typically overlooked in the literature. An algorithm is offered that computes the optimal RIS configuration with complexity of O(MlogM) in number of elements M , instead of intractable exponential complexity of exhaustive search, while accommodating any number K≥2 of loads. With the proposed algorithm, it is shown that performance gains reach a plateau for constant element spacing and increasing number of elements, suggesting that the weak, passive nature of backscattered links limits the performance gains, even with perfect channel estimation. Channel estimation with linear minimum mean squared error (LMMSE) estimator is shown to be effective, provided that there are sufficient number of pilot symbols. A concrete way is offered to design and prototype a wireless, batteryless, RF-powered, reconfigurable surface and a proof-of-concept is experimentally demonstrated. | en |
| Τύπος | Peer-Reviewed Journal Publication | en |
| Τύπος | Δημοσίευση σε Περιοδικό με Κριτές | el |
| Άδεια Χρήσης | http://creativecommons.org/licenses/by/4.0/ | en |
| Ημερομηνία | 2025-04-15 | - |
| Ημερομηνία Δημοσίευσης | 2023 | - |
| Θεματική Κατηγορία | Backscatter radio | en |
| Θεματική Κατηγορία | RFID | en |
| Θεματική Κατηγορία | Gen2 | en |
| Θεματική Κατηγορία | Reconfigurable surface | en |
| Βιβλιογραφική Αναφορά | I. Vardakis, G. Kotridis, S. Peppas, K. Skyvalakis, G. Vougioukas and A. Bletsas, "Intelligently wireless batteryless RF-powered reconfigurable surface: theory, implementation & limitations," IEEE Trans. Wireless Commun., vol. 22, no. 6, pp. 3942-3954, June 2023, doi: 10.1109/TWC.2022.3222733. | en |
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