Institutional Repository
Technical University of Crete
Technical University of Crete
EN
|
EL
| URI | http://purl.tuc.gr/dl/dias/4560BCC7-819C-4E8D-8FB5-47EE9EF4CEF6 | - |
| Identifier | https://doi.org/10.1109/TWC.2022.3222733 | - |
| Identifier | https://ieeexplore.ieee.org/document/9961233 | - |
| Language | en | - |
| Extent | 13 pages | en |
| Title | Intelligently wireless batteryless RF-powered reconfigurable surface: theory, implementation & limitations | en |
| Creator | Vardakis Iosif | en |
| Creator | Βαρδακης Ιωσηφ | el |
| Creator | Kotridis Georgios | en |
| Creator | Κοτριδης Γεωργιος | el |
| Creator | Peppas Spyridon | en |
| Creator | Πεππας Σπυριδων | el |
| Creator | Skyvalakis Konstantinos | en |
| Creator | Σκυβαλακης Κωνσταντινος | el |
| Creator | Vougioukas Georgios | en |
| Creator | Βουγιουκας Γεωργιος | el |
| Creator | Bletsas Aggelos | en |
| Creator | Μπλετσας Αγγελος | el |
| Publisher | Institute of Electrical and Electronics Engineers | en |
| Description | 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 |
| Content Summary | 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 |
| 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 | 2025-04-15 | - |
| Date of Publication | 2023 | - |
| Subject | Backscatter radio | en |
| Subject | RFID | en |
| Subject | Gen2 | en |
| Subject | Reconfigurable surface | en |
| Bibliographic Citation | 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 |
Copyright © DIAS 2013
