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Intelligent Beam Steering for Wireless Communication Using Programmable Metasurfaces

Ashraf, Nouman; Saeed, Taqwa; Taghvaee, Hamidreza; Abadal, Sergi; Vassiliou, Vasos; Liaskos, Christos; Pitsillides, Andreas; Lestas, Marios


Nouman Ashraf

Taqwa Saeed

Hamidreza Taghvaee

Sergi Abadal

Vasos Vassiliou

Christos Liaskos

Andreas Pitsillides

Marios Lestas


Reconfigurable Intelligent Surfaces (RIS) are well established as a promising solution to the blockage problem in millimeter-wave (mm-wave) and terahertz (THz) communications, envisioned to serve demanding networking applications, such as 6G and vehicular. HyperSurfaces (HSF) is a revolutionary enabling technology for RIS, complementing Software Defined Metasurfaces (SDM) with an embedded network of controllers to enhance intelligence and autonomous operation in wireless networks. In this work, we consider feedback-based autonomous reconfiguration of the HSF controller states to establish a reliable communication channel between a transmitter and a receiver via programmable reflection on the HSF when Line-of-sight (LoS) between them is absent. The problem is to regulate the angle of reflection on the metasurface such that the power at the receiver is maximized. Extremum Seeking Control (ESC) is employed with the control signals generated mapped into appropriate metasurface coding signals which are communicated to the controllers via the embedded controller network (CN). This information dissemination process incurs delays which can compromise the stability of the feedback system and are thus accounted for in the performance evaluation. Extensive simulation results demonstrate the effectiveness of the proposed method to maximize the power at the receiver within a reasonable time even when the latter is mobile. The spatiotemporal nature of the traffic for different sampling periods is also characterized.


Ashraf, N., Saeed, T., Taghvaee, H., Abadal, S., Vassiliou, V., Liaskos, C., …Lestas, M. (2023). Intelligent Beam Steering for Wireless Communication Using Programmable Metasurfaces. IEEE Transactions on Intelligent Transportation Systems, 24(5), 4848-4861.

Journal Article Type Article
Acceptance Date Jan 10, 2023
Online Publication Date Feb 10, 2023
Publication Date 2023-05
Deposit Date Feb 21, 2023
Publicly Available Date Feb 23, 2023
Journal IEEE Transactions on Intelligent Transportation Systems
Print ISSN 1524-9050
Electronic ISSN 1558-0016
Publisher Institute of Electrical and Electronics Engineers (IEEE)
Peer Reviewed Peer Reviewed
Volume 24
Issue 5
Pages 4848-4861
Keywords Metasurfaces , Receivers , Wireless communication , Delays , Beam steering , Transmitters , Training, Beam steering , extremum seeking control , hyperSurface , intelligent reflecting surfaces , metamaterial , programmable wireless environments
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