Results 21 to 30 of about 5,058,583 (266)

Experimental Demonstration of a mmWave Passive Access Point Extender Based on a Binary Reconfigurable Intelligent Surface

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, Mikhail Odit, Jean-Baptiste Gros, Vladimir Lenets, Akira Kumagai, Mathias Fink, Kotaro Enomoto, Geoffroy Lerosey   +7 more
doaj   +1 more source

Autonomous Reconfigurable Intelligent Surfaces Through Wireless Energy Harvesting [PDF]

, 2022
In this paper, we examine the potential for a reconfigurable intelligent surface (RIS) to be powered by energy harvested from information signals. This feature might be key to reap the benefits of RIS technology's lower power consumption compared to ...
Abadal Cavallé, Sergi, Martins, Wallace Alves, Alexiou, Angeliki, Lazarakis, Fotis, Abadal, Sergi, ALVES MARTINS, Wallace, Boulogeorgos, Apostolos-Alexandros A., Selimis, Dimitrios, NTONTIN, Konstantinos, Björnson, Emil, CHATZINOTAS, Symeon, KISSELEFF, Steven, Boulogeorgos, Alexandros Apostolos A.   +12 more
core   +1 more source

A Reconfigurable Intelligent Surface at mmWave Based on a Binary Phase Tunable Metasurface

IEEE Open Journal of the Communications Society, 2021
Originally introduced in the early 2010’s, the idea of smart environments through reconfigurable intelligent surfaces (RIS) controlling the reflections of the electromagnetic waves has attracted much attention in recent years in preparation for ...
Jean-Baptiste Gros, Vladislav Popov, Mikhail A. Odit, Vladimir Lenets, Geoffroy Lerosey   +4 more
doaj   +1 more source

Trusted Reconfigurable Intelligent Surface for Multi-User Quantum Key Distribution [PDF]

, 2023
peer reviewedWe consider a multi-user quantum key distribution (QKD) system based on free-space optics (FSO) in terrestrial environment. Due to obstacles in the signal path, FSO-QKD is heavily affected by decoherence and other harmful effects.
Steven Kisseleff, Symeon Chatzinotas, CHATZINOTAS, Symeon, KISSELEFF, Steven   +3 more
core   +1 more source

Artificial noise aided directional modulation via reconfigurable intelligent surface: Secrecy guarantee in range domain

IET Communications, 2022
Recently, the physical limitation of range‐domain security guarantee for directional modulation with frequency diverse array was disclosed in Ding et al. (IEEE Access 8, 63302–63309 (2020)).
Jiangong Chen, Yue Xiao, Xia Lei, Hong Niu, Yanli Yuan   +4 more
doaj   +1 more source

Reconfigurable Intelligent Surface for Massive Connectivity

CoRR, 2021
With the rapid development of Internet of Things (IoT), massive machine-type communication has become a promising application scenario, where a large number of devices transmit sporadically to a base station (BS). Reconfigurable intelligent surface (RIS) has been recently proposed as an innovative new technology to achieve energy efficiency and ...
Shuhao Xia, Yuanming Shi, Yong Zhou 0006, Xiaojun Yuan 0002   +3 more
openaire   +2 more sources

Corrections to “WiThRay: A Versatile Ray-Tracing Simulator for Smart Wireless Environments”

IEEE Access, 2023
In the above article [1], the reconfigurable intelligent surface (RIS) response model in (17) needs to be modified as follows:
Hyuckjin Choi, Jaeky Oh, Jaehoon Chung, George C. Alexandropoulos, Junil Choi   +4 more
doaj   +1 more source

Reconfigurable Intelligent Surface-Empowered MIMO Systems [PDF]

IEEE Systems Journal, 2021
To appear in IEEE SYSTEMS JOURNAL, 9 pages, 6 figures, and 1 ...
Aymen Khaleel, Ertugrul Basar
openaire   +6 more sources

Application of reconfigurable intelligent surface in beamforming and information modulation

Dianxin kexue, 2021
In modern mobile communications, the randomness, uncertainty, and uncontrollability of wireless channels are the pivotalfactors that affect the communication quality, which often leads to the deterioration of the signal quality at the receiving terminal,
Qiang CHENG, Junyan DAI, Junchen KE, Jingcheng LIANG, Siran WANG   +4 more
doaj   +2 more sources

A Survey on the Impact of Intelligent Surfaces in the Terahertz Communication Channel Models

Sensors, 2023
Terahertz (THz) band will play an important role in enabling sixth generation (6G) envisioned applications. Compared with lower frequency signals, THz waves are severely attenuated by the atmosphere temperature, pressure, and humidity.
Jefferson D. S. E Silva, Jéssica A. P. Ribeiro, Vignon F. Adanvo, Samuel B. Mafra, Luciano L. Mendes, Yonghui Li, Rausley A. A. de Souza   +6 more
doaj   +1 more source