Results 61 to 70 of about 1,048 (180)

Reconfigurable Intelligent Surface (RIS)-Assisted Entanglement Distribution in FSO Quantum Networks

IEEE Transactions on Wireless Communications
Quantum networks (QNs) relying on free-space optical (FSO) quantum channels can support quantum applications in environments wherein establishing an optical fiber infrastructure is challenging and costly. However, FSO-based QNs require a clear line-of-sight (LoS) between users, which is challenging due to blockages and natural obstacles. In this paper,
Mahdi Chehimi, Mohamed Elhattab, Walid Saad, Gayane Vardoyan, Nitish K. Panigrahy, Chadi Assi, Don Towsley   +6 more
openaire   +2 more sources

6G MIMO Spatio-Temporal Data Scattering for Reconfigurable Intelligent Surface (RIS) Performance

, 2023
Orbital Angular Momentum (OAM), provides the new angular or mode dimension for wireless communications, offers an intriguing way for anti-jamming. The unprecedented demands for high- quality and seamless wireless services impose continuous challenges to existing cellular networks.
openaire   +1 more source

Optical STAR-RIS-Aided VLC Systems: RSMA Versus NOMA

IEEE Open Journal of the Communications Society
A critical concern within the realm of visible light communications (VLC) pertains to enhancing system data rate, particularly in scenarios where the direct line-of-sight (LoS) connection is obstructed by obstacles.
Omar Maraqa, Sylvester Aboagye, Telex M. N. Ngatched   +2 more
doaj   +1 more source

Cascaded channel decoupling based solution for RIS regulation matrix

Intelligent and Converged Networks
This article presents a pioneering solution to address the challenges of reconfigurable intelligent surface (RIS), employing a cascaded channel decoupling strategy.
Yajun Zhao
doaj   +1 more source

STAR-RIS-Assisted Millimeter-Wave Secure Communication with Multiple Eavesdroppers

Mathematics
Aiming to address the limited coverage of conventional reconfigurable intelligent surfaces (RISs), this study proposes a millimeter-wave secure communication scheme based on the simultaneously transmitting and reflecting reconfigurable intelligent ...
Binghui Qian, Jingping Qiao, Chuanting Zhang   +2 more
doaj   +1 more source

Robust and secure communications using dynamic rotations reconfigurable intelligent surface

ICT Express
This paper investigates the secure transmission problem using a dynamically reconfigurable intelligent surface (RIS). Considering an eavesdropping scenario where a multi-antenna eavesdropper has inadequate channel state information, a resilient ...
Kunyu Li, Guoping Zhang, Hongbo Xu, Ruijie Li, Yun Chen, Xingxing Huang   +5 more
doaj   +1 more source

STAR-RIS-assisted key generation method in quasi-static environment

EURASIP Journal on Wireless Communications and Networking
In this paper, we introduce a new method to solve the low-entropy problem in a quasi-static environment. We utilize a simultaneous transmission and reflection reconfigurable intelligent surface (STAR-RIS) that transmits and reflects incoming signals to ...
Yang Ma, Liquan Chen, Tianyu Lu, Yufan Song, Kailin Cao   +4 more
doaj   +1 more source

A Survey of Multiple Reconfigurable Intelligent Surface Aided Systems

IEEE Access
Reconfigurable intelligent surface (RIS) can establish reflection links between base stations and users, providing high passive beamforming gain that significantly enhances the system’s achievable rate. Given the outstanding performance of RIS, we
Renjie Liang, Junjie Liang
doaj   +1 more source

Proposed Multiple Reconfigurable Intelligent Surfaces to Mitigate the Inter-User-Interference Problem in NLOS

Journal of Communications Software and Systems
Reconfigurable Intelligent Surfaces (RIS) are gaining significant global interest as a potential technology that could enable 6G. An efficient method employs passive element reflectors to extend coverage of the non-line of sight (NLOS) millimeter-wave ...
Bushra Jarjees Qeryaqos, Saad Ahmed Ayoob   +1 more
doaj   +1 more source

Plug-In RIS: A Novel Approach to Fully Passive Reconfigurable Intelligent Surfaces

IEEE Transactions on Wireless Communications
This paper presents a promising design concept for reconfigurable intelligent surfaces (RISs), named plug-in RIS, wherein the RIS is plugged into an appropriate position in the environment, adjusted once according to the location of both base station and blocked region, and operates with fixed beams to enhance the system performance. The plug-in RIS is
Mahmoud Raeisi, Ibrahim Yildirim, Mehmet C. Ilter, Majid Gerami, Ertugrul Basar   +4 more
openaire   +2 more sources