Optimally extracting the advantages available from reconfigurable intelligent surfaces (RISs)
in wireless communications systems requires estimation of the channels to and from the RIS …

Reconfigurable Intelligent Surfaces (RISs) have been recently proposed as an enabling
technology for programmable wireless environments. In this paper, we present asymptotic …

Reconfigurable intelligent surfaces (RIS) is a revolutionary technology to cost-effectively
improve the performance of wireless networks. We first review the existing framework of …

In reconfigurable intelligent surface (RIS)-assisted systems the acquisition of channel state
information and the optimization of reflecting coefficients constitute major design challenges …

Intelligent surfaces comprising of cost effective, nearly passive, and reconfigurable unit
elements are lately gaining increasing interest due to their potential in enabling fully …

The demanding objectives for the future sixth generation (6G) of wireless communication
networks have spurred recent research efforts on novel materials and radio-frequency front …

Reconfigurable Intelligent Surfaces (RISs) are envisioned to play a key role in future
wireless communications, enabling programmable radio propagation environments. They …

Using reconfigurable intelligent surfaces (RISs) to improve the coverage and the data rate of
future wireless networks is a viable option. These surfaces are constituted of a significant …

We consider multi-antenna wireless systems aided by reconfigurable intelligent surfaces
(RIS). RIS presents a new physical layer technology for improving coverage and energy …

Next-generation communication systems aim for providing pervasive services, including the
high-mobility scenarios routinely encountered in mission-critical applications. Hence we …