Simultaneously transmitting and reflecting reconfigurable intelligent surfaces (STAR-RISs) can dynamically adjust wireless channels through joint controls. The recent development of dual STAR-RISs (D-STAR) architecture provides capacity improvement by utilizing signals impinging from 360-degree for full-plane service c...
Yu-Ting Li, Kai-Ten Feng, Li-Hsiang Shen et al.· IEEE Transactions on Communi...· 0 citations
Simulation results reveal that a compact FSIM with a small inter-layer thickness is preferable, as increasing the thickness weakens inter-layer coupling and degrades the achievable sum rate, and the proposed AO-based algorithm achieves superior rate performance compared to sub-schemes, metaheuristic methods, and conven...
This letter investigates an energy-efficient active stacked intelligent metasurfaces (ASIM)-assisted downlink transmission framework, where a multi-antenna base station (BS) serves multiple users through a multi-layer metasurface architecture. Unlike conventional passive intelligent surfaces, the considered ASIM employ...