Results 31 to 40 of about 5,091,880 (125)

Joint User Localization and Location Calibration of A Hybrid Reconfigurable Intelligent Surface

, 2023
The recent research in the emerging technology of reconfigurable intelligent surfaces (RISs) has identified its high potential for localization and sensing.
Ghazalian, Reza,, Jäntti, Riku,, George C Alexandropoulos, Riku Jäntti, Ghazalian, Reza, Gonzalo Seco-Granados, Henk Wymeersch, Alexandropoulos, G. C., Reza Ghazalian, Hui Chen, Seco-Granados, G., Alexandropoulos, G. C.,, Seco-Granados, G.,, Chen, Hui, Wymeersch, Henk,, Wymeersch, Henk, J\ue4ntti, Riku, Chen, Hui,   +17 more
core   +1 more source

AI-Native Entanglement-Sustained Reconfigurable Intelligent Surfaces for Hybrid Quantum-Classical THz-Enabled 6G Networks

IEEE Open Journal of the Communications Society
Quantum-classical hybrid communication is emerging as a key enabler for future 6G networks, where THz communication and quantum services are expected to coexist over intelligent and reconfigurable wireless infrastructures. A fundamental challenge in such
Shweta Singh, Kumar Sekhar Roy, Rahul Kumar   +2 more
doaj   +1 more source

A Multifunctional Ionograsper Enabling Ion‐Redistribution Proximity Sensing and Structural‐Reconfiguration‐Driven Bidirectional Actuation

Advanced Materials, EarlyView.
A solid‐state ionic actuator integrates sensing, actuation, and memory within one material. A brief UV pulse induces long‐lasting deformation via coupled network rearrangement, dehydration, and rehydration, while ionic redistribution enables self‐powered sensing, supporting multifunctional, energy‐efficient soft robotic functions without continuous ...
Yong Min Kim, Jin Han Kwon, Hyeon Woo Yang, Sungryong Kim, Gyeong Rok Lee, Hong Chul Moon   +5 more
wiley   +1 more source

Liquid‐Crystal‐Based Reconfigurable Intelligent Surface for 7 GHz Mobile Communication

Advanced Materials Technologies, EarlyView.
The glass‐based liquid‐crystal reconfigurable intelligent surface (LC‐RIS) integrates active‐matrix driving and blind‐greedy phase optimization within a 5G‐NR OFDM framework. This enables continuously tunable and autonomous enhancement of wireless coverage. Leveraging the transparency and manufacturability of liquid crystal panels, it is ideally suited
Tien‐Lun Ting, Yuh‐Chyi Chang, Yi‐Chan Hung, Cheng‐Yuan Hsiao, Chao‐Kai Wen, Tsung‐Hsien Lin   +5 more
wiley   +1 more source

Active Reconfigurable Intelligent Surface-Assisted Cell-Free Massive MIMO

, 2023
International audienceThis work analyzes the spectral efficiency (SE) of theactive Reconfigurable intelligent surfaces (RIS)-assisted cell-free(CF) massive multiple-input multiple-output (mMIMO) underRayleigh fading channels.
Shin, Suho, Theodore, Woode, Anokye, Prince, Lee, Kyoung-Jae, Asiedu, Derek, Kwaku Pobi   +4 more
core   +1 more source

Enhanced Spectral Efficiency in RIS-Assisted MIMO Systems Through Joint Precoding and RIS Configuration

IEEE Access
Reconfigurable Intelligent Surfaces (RIS) offer a promising solution to enhance wireless communication performance, particularly for 6G networks. This paper proposes a unified joint optimization framework to enhance spectral efficiency in reconfigurable ...
Mohammed Adil Abbas, Aqiel N. Almamori, Ahmed Jumaa Lafta, Asaad H. Sahar   +3 more
doaj   +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, Ibrahim Hemadeh, Alain Mourad, Arman Shojaeifard, Markku Juntti   +4 more
doaj   +1 more source

Gate‐Tunable Polarity‐Reconfigurable Photovoltaic Response With Dual Linearity in NbS3/WSe2 Heterostructures for In‐Sensor Image Processing

Advanced Science, EarlyView.
An NbS3/WSe2 van der Waals heterostructure realizes a continuously gate‐tunable self‐powered photovoltaic response through interfacial band‐alignment modulation and reversible built‐in electric‐field switching. The short‐circuit photocurrent scales linearly with incident power density, while short‐circuit photoresponsivity varies linearly with gate ...
Jidong Liu, Jianxiong Xie, Qiaoyan Hao, Yutao Hu, Zhen He, Haolin Liu, Danting Lin, Haibo Gan, Yudi Tu, Wenjing Zhang   +9 more
wiley   +1 more source

Reconfigurable intelligent surface design using PIN diodes via rotation technique -Proof of concept

, 2023
International audienceIn this paper, we present the design of a reconfigurable intelligent surface (RIS) operating in the Kaband (27 – 31GHz). The considered RIS operates in reflection mode; thus, it is a reflectarray antenna.
Errico, Raffaele, D, Clemente, Antonio, Gharbieh, Samara   +2 more
core   +1 more source

From Sensing Mechanisms to System Co‐Design: Graphene‐Based Sensors and Readout Circuits

Advanced Science, EarlyView.
This review establishes a unified PS–EQ–RF framework linking graphene sensing mechanisms, native electrical outputs, and output‐specific readout circuits. Voltage‐, current‐, resistance‐, and capacitance‐type sensing systems are systematically classified to guide architecture selection, low‐noise design, system co‐design, and practical integration ...
Jinduo Zhang, Meng Chen, Guanchen Li, Ruifeng Liu, Yingxin Wang, Ziran Zhao   +5 more
wiley   +1 more source