Exact Beam Synthesis with RIS-Augmented Receiver

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Authors

Date

2025

Department

Department of Information and Communications Engineering

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Mcode

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Language

en

Pages

16

Series

IEEE Access, Volume 13, pp. 162731-162746

Abstract

This article introduces an exact, first-principles method for beamforming with a receiver that is augmented by a reconfigurable intelligent surface (RIS). We demonstrate a way to synthesize a target beam from a finite set of elementary beams. The article also discusses a way to optimize the codebook of the augmented receiver. The goal is to optimize the average utility of the synthesized beam pattern. The analysis is based on full-wave electromagnetic field theory and its analytical solutions. In particular, we make use of the theory of multiple scattering to model the electromagnetic interactions between the RIS elements. We consider three geometries of the receiver array: (a) linear, (b) wedge-like, and (c) circular. The scattering elements in the arrays are taken to be circular cylinders of infinite length, so that the model is effectively two-dimensional. The authors show that the method of exact beam synthesis outperforms their foregoing beam synthesis methods and conventional beamforming.

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Publisher Copyright: © 2013 IEEE.

Keywords

Beam steering, codebook optimization, electromagnetic fields, multiple scattering, reconfigurable intelligent surfaces (RIS)

Other note

DOI

10.1109/ACCESS.2025.3608937

Citation

Rimpiläinen, T E & Jäntti, R 2025, 'Exact Beam Synthesis with RIS-Augmented Receiver', IEEE Access, vol. 13, pp. 162731-162746. https://doi.org/10.1109/ACCESS.2025.3608937

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https://urn.fi/URN:NBN:fi:aalto-202510087871

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