Results 61 to 70 of about 5,091,880 (125)

On Propagation Characteristics of Reconfigurable Surface Wave Platform: Simulation and Experimental Verification

IEEE Access
Reconfigurable intelligent surface (RIS) as a smart reflector is revolutionizing research for next-generation wireless communications. In contrast to this is a concept of using RIS as an efficient propagation medium for superiorly low path loss ...
Zhiyuan Chu, Kin-Fai Tong, Kai-Kit Wong, Chan-Byoung Chae, Chi Hou Chan   +4 more
doaj   +1 more source

Stair‐Climbing Wheelchairs for Enhanced Mobility: A Comprehensive Review of Fundamental Mechanisms, Design Concepts, and Performance Analysis

Journal of Field Robotics, EarlyView.
ABSTRACT People with physical disabilities face significant mobility challenges while climbing uneven surfaces and staircases. In these circumstances, traditional wheelchairs do not provide stable, safely controlled mobility, underscoring the importance of building superior stair‐climbing wheelchairs for both medical and infrastructure purposes.
Gopisetti Manikanta, S. M. Abhinandan, Anand Reddy, G. Chandana, Divya, P. Anil Kumar, Ch. Venkata Rao, Ashish Garg, Ravi C. Soni, Jogendra Kumar, Bhargav Akkinepally   +10 more
wiley   +1 more source

Two-Timescale Design for Reconfigurable Intelligent Surface-Aided Massive MIMO Systems with Imperfect CSI

, 2021
Revision in IEEE TIT. Keywords: Reconfigurable Intelligent Surface, Intelligent Reflecting Surface, Massive MIMO, Channel estimation, etcRevision in IEEE TIT.
Zhi, K, Poor, HV, Wang, J, Elkashlan, M, Renzo, MD, Wang, K, Schober, R, Ren, H, Hanzo, L, Pan, C   +9 more
core   +3 more sources

Low‐Complexity Phase–Transition‐Based VO2 Transmissive Reconfigurable Intelligent Surface for Indoor Millimeter‐Wave Communications

Nanophotonics, Volume 15, Issue 17, 11 September 2026.
We demonstrate a VO2‐based transmissive reconfigurable intelligent surface for indoor millimeter‐wave communication. The TRIS replaces conventional PIN and varactor diodes with geometrically tailored VO2 switches, enabling transmitted phase control through phase‐transition‐based switching.
Junghyeon Kim, Sumin Bark, Minjae Lee, Sungjoon Lim   +3 more
wiley   +1 more source

Broadband Silicon‐On‐Glass Reflective Dielectric Metasurface for THz Beam Steering in 6G Wireless Networks

Advanced Functional Materials, Volume 36, Issue 75, 17 September 2026.
A CMOS‐compatible, all‐dielectric Silicon‐on‐Glass reflective metasurface enables low–loss terahertz wavefront control for future 6G wireless communication. Mie‐resonant silicon pillars provide full phase coverage near 500 GHz, achieving experimentally validated single‐, dual‐, and five‐beam steering with sub‐1.5° angular error and less than 3 dB ...
Rithwik Premanand, Yi Ji Tan, Thomas CaiWei Tan, Prakash Pitchappa, Hemanth Kumar Cheemalamarri, A. S. Madhukumar, Ranjan Singh   +6 more
wiley   +1 more source

Channel-space endogenous anti-jamming method based on multi-reconfigurable intelligent surface

Tongxin xuebao, 2023
In view of the concern that the traditional anti-jamming method based on jamming recognition is challenging to defend against both the unknown and the intelligent jamming attacks, a dynamic, heterogeneous, and redundant channel-space anti-jamming ...
Yonggang ZHU, Yifu SUN, Fuqiang YAO, Cheng LI, Wenlong GUO, Kang AN   +5 more
doaj   +2 more sources

Sub‐Terahertz Memristor Switches Using MoS2 by Liquid–Liquid Interface Assembly

Advanced Science, Volume 13, Issue 49, 3 September 2026.
This work introduces application‐ready sub‐terahertz memristor switches fabricated from electrochemically exfoliated MoS2 nanosheets assembled at a liquid–liquid interface. The devices exhibit robust unipolar resistive switching, low insertion loss, and high isolation across 10–110 GHz.
Tomás Mingates, Mohamed E. Ghatas, Jonas Deuermeier, Adam G. Kelly, Joseph Neilson, Jonathan N. Coleman, Luís Mendes, João C. Vaz, Sérgio Matos, Luca Lucci, Antonio Clemente, Zdeněk Sofer, Luís M. Pessoa, Elvira Fortunato, Rodrigo Martins, Asal Kiazadeh   +15 more
wiley   +1 more source

Joint 3D User and 6D Hybrid Reconfigurable Intelligent Surface Localization [Elektronisk resurs]

The latest assessments of the emerging technologies for reconfigurable intelligent surfaces (RISs) have indicated the concept's significant potential for localization and sensing, either as individual or simultaneously realized tasks.
Ghazalian, Reza,, Alexandropoulos, G. C.,, Seco-Granados, G.,, Jäntti, Riku,, Wymeersch, Henk,   +4 more
core   +1 more source

A Reinforcement Learning Approach for Reconfigurable Intelligent Surface (RIS)-Assisted Multi-User Wireless Networks: Experimental Testbed Validation [PDF]

To address the application challenges of reconfigurable intelligent surface (RIS) optimizations in practical wireless networks, this paper proposes a model-free and channel state information (CSI)-free reinforcement learning algorithm, named cross ...
Zappone, Alessio, Wassell, Ian, Gradoni, Gabriele, Chen, Tianrui, You, Minglei, Zhang, Yangyishi, Paolis, Fabrizio De, Zhong, Yi   +7 more
core   +1 more source

Fairness Optimization for VLC Systems With Liquid Crystal-Based RIS-Enabled Transmitters

IEEE Photonics Journal
The application of liquid crystal (LC)-based reconfigurable intelligent surface (RIS)-assisted transmitters in visible light communication (VLC) systems can guide and amplify the light emitted by light emitting diodes (LEDs).
Xin-Yu Zhang, Jian Zhang, Qi Wu
doaj   +1 more source