Results 51 to 60 of about 5,091,880 (125)

Reconfigurable Intelligent Surface (RIS) Aided Multi-User Networks: Interplay Between NOMA and RIS [PDF]

, 2021
This article focuses on the exploitation of reconfigurable intelligent surfaces (RISs) in multi-user networks employing orthogonal multiple access (OMA) or non-orthogonal multiple access (NOMA), with an emphasis on investigating the interplay between ...
Schober, Robert, Liu, Yuanwei, Ding, Zhiguo, Di Renzo, Marco, Mu, Xidong, Liu, Xiao   +5 more
core   +1 more source

Multi-Functional Reconfigurable Intelligent Surface Assisted Security Communication Systems Under Imperfect CSI of Eavesdroppers

IEEE Access
In order to overcome the “multiplicative fading” loss and half-space coverage limitations faced by reconfigurable intelligent surfaces (RIS) in secure communications, a more practical multi-functional reconfigurable intelligent surface (MF ...
Rui-Bao Zhang, Dian-Wu Yue, Yu Sun
doaj   +1 more source

Updatable Closed‐Form Evaluation of Arbitrarily Complex Multiport Network Connections

Advanced Electronic Materials, EarlyView.
The inverse design of electrically large wave devices often uses reduced‐order multiport models with discrete optimization, requiring many evaluations of complex interconnections between subsystems that differ only in a few blocks. This paper introduces a closed‐form framework enabling efficient Woodbury low‐rank updates of related, previous ...
Hugo Prod'homme, Philipp del Hougne
wiley   +1 more source

Path Loss Modeling for RIS-Assisted Wireless Communication in Tunnel Scenarios

Sensors
Aiming to address the problem of limited transmission distance in applying reconfigurable intelligent surface (RIS) technology, this study leverages a tunnel simulation platform to investigate RIS-assisted wireless communication systems.
Qi Yang, Yating Wu, Hengkai Zhao, Yichen Feng, Yanqiong Sun, Zhou Fang, Guoxin Zheng   +6 more
doaj   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

Analysis of reconfigurable intelligent surface assisted networking

Dianxin kexue
Network assisted with reconfigurable intelligent surface is a kind of low-cost and low-power solution which can provide stable, continuous and ubiquitous connection to satisfy deep coverage requirements in 5G-Advanced (5G-A) and 6G era.
LIU Qiuyan, LI Bei, CAO Yanxia, YAO Saibin, JIANG Zhenwei, MO Xiaohao, WANG Yafeng   +6 more
doaj   +2 more sources

A Novel Reconfigurable Intelligent Surface for Wide-Angle Passive Beamforming

, 2022
A design for a highly reconfigurable intelligent surface (RIS) that can provide 3-D passive reflective beamforming suitable for sub-6-GHz frequency bands is proposed.
Shanpu Shen, Chi-Yuk Chiu, Chiu, Chi Yuk, Rao, Junhui, Zan Li, Murch, Ross, Yujie Zhang, Junhui Rao, Zhang, Yujie, Li, Zan, Shiwen Tang, Tang, Shiwen, Ross Murch, Shen, Shanpu   +13 more
core   +2 more sources

Recent Advances in Programmable Metasurfaces and Meta‐Devices

Advanced Electronic Materials, EarlyView.
Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao, Chong He, Nan Wang, Liming Si, Weiren Zhu   +4 more
wiley   +1 more source

Design of Active Reconfigurable Intelligent Surface for Sub-6 GHz

, 2023
This paper proposes a channel model for reconfigurable intelligent surfaces (RIS). The model takes into account the losses incurred by digital phase shifters in different phase states and considers the influence of antenna polarization, making it more ...
Wu, Chi-Hung
core  

Physics Informed Generative Surrogate Learning for Full Wave Validated Real Time Beamforming in Programmable Metasurfaces

Advanced Electronic Materials, EarlyView.
A physics‐guided generative surrogate framework is developed for programmable metasurface beamforming. Mode‐conditioned binary state generation, aperture‐physics prediction, routed residual correction, NSGA‐II optimization, and CST validation are combined to support fast candidate screening and full‐wave beam refinement across single‐beam, dual‐beam ...
Wenqian Liu, Weidong Chen, Chang Chen, Xiang Zhang, Sensong An   +4 more
wiley   +1 more source