articleIEEE Signal Processing MagazineFeb 24, 2022GREEN OA

Reconfigurable Intelligent Surfaces: A signal processing perspective with wireless applications

EBEmil BjörnsonHWHenk WymeerschBMBho MatthiesenPPPetar PopovskiLSLuca Sanguinetti

KTH Royal Institute of Technology · Chalmers University of Technology · +3 more institutions

Indexed inarxivcrossref

Abstract

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 [1] , but it was with the deployment of 5G wireless mobile networks that the technology became mainstream [2] . 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…

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Topics
Keywords
  • Computer science
  • Signal processing
  • Wireless
  • Perspective (graphical)
  • Digital signal processing
  • Telecommunications
  • Computer hardware
  • Artificial intelligence
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