Article (Scientific journals)
Wireless Energy Harvesting For Autonomous Reconfigurable Intelligent Surfaces
Ntontin, Konstantinos; Boulogeorgos, Alexandros-Apostolos A.; Björnson, Emil et al.
2023In IEEE Transactions on Green Communications and Networking, 7 (1), p. 114 - 129
Peer reviewed
 

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Abstract :
[en] In the current contribution, we examine the feasibility of fully-energy-autonomous operation of reconfigurable intelligent surfaces (RIS) through wireless energy harvesting (EH) from incident information signals. Towards this, we first identify the main RIS energy-consuming components and present a suitable and accurate energy-consumption model that is based on the recently proposed integrated controller architecture and includes the energy consumption needed for channel estimation. Building on this model, we introduce a novel RIS architecture that enables EH through RIS unit-cell (UC) splitting. Subsequently, we introduce an EH policy, where a subset of the UCs is used for beamsteering, while the remaining UCs absorb energy. In particular, we formulate a subset al.ocation optimization problem that aims at maximizing the signal-to-noise ratio (SNR) at the receiver without violating the RIS’s energy consumption demands. As a problem solution, we present low-complexity heuristic algorithms. The presented numerical results reveal the feasibility of the proposed architecture and the efficiency of the presented algorithms with respect to both the optimal and very high-complexity brute-force approach and the one corresponding to random subset selection. Furthermore, the results reveal how important the placement of the RIS as close to the transmitter as possible is, for increasing the harvesting effectiveness.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Ntontin, Konstantinos ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
Boulogeorgos, Alexandros-Apostolos A.;  University of Piraeus > Digital Systems
Björnson, Emil;  KTH > Computer Science
Alves Martins, Wallace ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
Kisseleff, Steven ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
Abadal, Sergi;  Universitat Politècnica de Catalunya > NaNoNetworking Center in Catalunya (N3Cat)
Alarcón, Eduard;  Universitat Politècnica de Catalunya > NaNoNetworking Center in Catalunya (N3Cat)
Papazafeiropoulos, Anastasios;  University of Hertfordshire > Communications and Intelligent Systems Research Group
Lazarakis, Fotis;  National Centre for Scientific Research–“Demokritos" > Institute of Informatics and Telecommunications
Chatzinotas, Symeon  ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
External co-authors :
yes
Language :
English
Title :
Wireless Energy Harvesting For Autonomous Reconfigurable Intelligent Surfaces
Publication date :
2023
Journal title :
IEEE Transactions on Green Communications and Networking
ISSN :
2473-2400
Publisher :
Institute of Electrical and Electronics Engineers (IEEE)
Volume :
7
Issue :
1
Pages :
114 - 129
Peer reviewed :
Peer reviewed
FnR Project :
FNR14773976 - Reconfigurable Intelligent Surfaces For Smart Cities, 2020 (01/06/2021-31/05/2024) - Bjorn Ottersten
Funders :
https://ieeexplore.ieee.org/document/9866567/authors
Available on ORBilu :
since 14 December 2022

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