Advancing RIS Beamforming Efficiency: Moving Beyond Diagonal Matrix Techniques

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date

2025

Department

Department of Electronics and Nanoengineering

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Language

en

Pages

14

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IEEE Transactions on Vehicular Technology, pp. 1-14

Abstract

Optimizing wireless propagation channels is essential for advancing future communication technologies, particularly in dynamic vehicular environments where high vehicle mobility is a challenge. This paper introduces a novel practical implementation of reconfigurable intelligent surfaces (RIS) that achieve highly efficient beamforming, significantly surpassing the limitations of the conventional diagonal phase shift approach. We expand the theoretical and optimization framework based on the discrete impedance model to accommodate practical design scenarios. We validate our approach by fabricating an RIS prototype and conducting experimental measurements using the parallel plate waveguide technique. The experimental results confirm the superior performance of our approach, demonstrating at least a 30% improvement in efficiency over diagonal matrix methods, thereby enhancing signal quality and coverage. This ensures seamless communication and ubiquitous connectivity, improving the quality of service by boosting the received signal.

Description

| openaire: EC/H2020/956256/EU//META WIRELESS

Keywords

Array signal processing, Impedance, Metasurfaces, Reconfigurable intelligent surfaces, Reflection, Surface impedance, Surface waves, Transmission line matrix methods, Vehicle dynamics, Wireless communication

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DOI

10.1109/TVT.2025.3583421

Citation

Shabanpour, J, Wang, X, Kosulnikov, S & Simovski, C 2025, 'Advancing RIS Beamforming Efficiency: Moving Beyond Diagonal Matrix Techniques', IEEE Transactions on Vehicular Technology, pp. 1-14. https://doi.org/10.1109/TVT.2025.3583421

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https://urn.fi/URN:NBN:fi:aalto-202507045560

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[article-cris] Sähkötekniikan korkeakoulu / ELEC