Reconfigurable Intelligent Surfaces: A signal processing perspective with wireless applications
By Emil Björnson, Henk Wymeersch, Bho Matthiesen, Petar Popovski, Luca Sanguinetti, E. de Carvalho. IEEE Signal Processing Magazine, 2021
479 citations recorded by the source corpus.
Antenna array technology enables the directional transmission and reception of wireless signals for communication, localization, and sensing purposes. The signal processing algorithms that underpin it began to be developed several decades ago <xref ref-type="bibr" rid="ref1">[1]</xref>, but it was with the deployment of 5G wireless mobile networks that the technology became mainstream <xref ref-type="bibr" rid="ref2">[2]</xref>. The number of antenna elements in the arrays of 5G base stations (BSs) and user devices can be measured on the order of hundreds and tens, respectively. As networks shift toward using higher-frequency bands, more antennas fit into a given aperture. For communication purposes, the arrays are harnessed to form beams in desired directions to improve the signal-to-noise ratio (SNR) and multiplex data signals in the spatial domain (to one or multiple devices) and to suppress interference by spatial filtering <xref ref-type="bibr" rid="ref2">[2]</xref>. For localization purposes, these arrays are employed to maintain the SNR when operating across wider bandwidths, for angle-of-arrival estimation, and to separate multiple sources and scatterers <xref ref-type="bibr" rid="ref3">[3]</xref>. The practical use of these features requires that each antenna array is equipped with well-designed signal processing algorithms.
Subfields: Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/6eddc270e0641c2e1f21917bb20962c25a430982
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Citations in the corpus
- The Integrated Sensing and Communication Revolution for 6G: Vision, Techniques, and Applications (2024, unknown): “The role of RIS for positioning lies in the ability to provide: 1) an additional position reference, similar to a BS; 2) additional measurements as any other path [e.g., the AoA, AoD, delay, and Doppler in (23)]; and 3) unique measurements of the AoA or AoD in (24) [173].”
- RIS-Aided Wireless Communications: Prototyping, Adaptive Beamforming, and Indoor/Outdoor Field Trials (2021, methodology): “described in [12], where different voltages result in widely different phase shifts over the considered frequency range.”
- An Overview of Signal Processing Techniques for Terahertz Communications (2020, unknown): “IRS signal processing enables both communications and sensing [395].”