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.
SIM- enabled hybrid digital-wave beamforming for fronthaul-constrained cell- free massive MIMO systems
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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.