Results 31 to 40 of about 1,622,378 (238)
Study and Design of Reconfigurable Intelligent Surfaces [PDF]
, 2022 In this thesis, we introduce the fundamental equations behind the estimation of the link budget in a communications channel, highlighting the key limitations of conventional systems.
Spanakis-Misirlis, Apostolos
core +1 more source
Codebook-Based Solutions for Reconfigurable Intelligent Surfaces and Their Open Challenges [PDF]
IEEE wireless communications, 2022 Reconfigurable intelligent surfaces (RIS) is a revolutionary technology to cost-effectively improve the performance of wireless networks. We first review the existing framework of channel estimation and passive beamforming (CE & PBF) in RIS-assisted ...
Jiancheng An +6 more
semanticscholar +1 more source
Reconfigurable Intelligent Surfaces Relying on Non-Diagonal Phase Shift Matrices [PDF]
IEEE Transactions on Vehicular Technology, 2022 Reconfigurable intelligent surfaces (RIS) have been actively researched as a potential technique for future wireless communications, which intelligently ameliorate the signal propagation environment.
Qing-Chao Li +6 more
semanticscholar +1 more source
Review Paper on Hardware of Reconfigurable Intelligent Surfaces
IEEE Access, 2023 Recently reconfigurable intelligent surface (RIS) has attracted great attention because it can create a smart wireless environment. Hence it can enhance the capacity and coverage of the wireless network significantly.
Biswarup Rana, Sung-Sil Cho, Ic-Pyo Hong
doaj +1 more source
STAR-RISs: Simultaneous Transmitting and Reflecting Reconfigurable Intelligent Surfaces
IEEE Communications Letters, 2021 In this letter, simultaneous transmitting and reflecting reconfigurable intelligent surfaces (STAR-RISs) are studied. Compared with the conventional reflecting-only RISs, the coverage of STAR-RISs is extended to 360 degrees via simultaneous transmission ...
Jiaqi Xu +3 more
semanticscholar +1 more source
Channel Estimation With Reconfigurable Intelligent Surfaces—A General Framework [PDF]
Proceedings of the IEEE, 2021 Optimally extracting the advantages available from reconfigurable intelligent surfaces (RISs) in wireless communications systems requires estimation of the channels to and from the RIS.
A. Swindlehurst +4 more
semanticscholar +1 more source
Survey on reconfigurable intelligent surfaces below 10 GHz
EURASIP Journal on Wireless Communications and Networking, 2021 Reconfigurable intelligent surface (RIS) is a programmable structure that can be used to control the propagation of electromagnetic waves by changing the electric and magnetic properties of the surface.
Visa Tapio +4 more
doaj +1 more source
Reconfigurable Intelligent Surfaces 2.0: Beyond Diagonal Phase Shift Matrices [PDF]
IEEE Communications Magazine, 2023 Reconfigurable intelligent surface (RIS) has been envisioned as a promising technique to enable and enhance future wireless communications due to its potential to engineer the wireless channels in a cost-effective manner. Extensive research attention has
Hongyu Li +3 more
semanticscholar +1 more source
Over‐the‐air equalization with reconfigurable intelligent surfaces
IET Communications, 2022 Reconfigurable intelligent surface (RIS)‐empowered communications is on the rise and is a promising technology envisioned to aid in 6G and beyond wireless communication networks.
Emre Arslan +3 more
doaj +1 more source
Frontiers in Communications and Networks, 2021 As data rates demands are exploding, 5G will soon rely on mmWaves that offer much higher bandwidths. Yet at these frequencies, attenuation and diffraction of waves require point to point communications with beamforming base stations that are complex and ...
Vladislav Popov +7 more
doaj +1 more source