A randomized space-time coded stacked intelligent metasurface uses partial CSIT and limited feedback to achieve competitive sum rates with much lower channel acquisition overhead than conventional designs.
Stacked intelligent metasurfaces for multiuser downlink beamforming in the wave domain,
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Randomized Space-Time Stacked Intelligent Metasurfaces for Massive Multiuser Downlink Connectivity
A randomized space-time coded stacked intelligent metasurface uses partial CSIT and limited feedback to achieve competitive sum rates with much lower channel acquisition overhead than conventional designs.