Results 41 to 50 of about 6,053 (218)

RIS-aided integrated sensing and communication: a mini-review

open access: yesFrontiers in Signal Processing, 2023
Integrating sensing and communication (ISAC) is a cutting-edge technology aimed at achieving high-resolution target sensing and high data-rate communications using a shared spectrum. This innovative approach optimizes the usage of the radio spectrum with
Mirza Asif Haider, Yimin D. Zhang
doaj   +1 more source

Overview of reconfigurable intelligent surface for new-generation mobile communication

open access: yesDianxin kexue, 2022
Reconfigurable intelligent surface technology, which features low cost, low energy consumption and easy deployment, is the potential key technology of 6G.By intelligently regulating electromagnetic waves in space, RIS can assist in building an ...
Zilu GAO, Shaohui SUN, Li LI
doaj   +2 more sources

Passive RIS vs. Hybrid RIS : A Comparative Study on Channel Estimation [PDF]

open access: yes, 2021
The reconfigurable intelligent surface (RIS) plays an important role in maintaining the connectivity in millimeter wave (mmWave) MIMO systems when the direct channel between the transceivers is blocked.
He, Jiguang   +2 more
core   +1 more source

iRIS: A Deep Policy Learning Framework for Intelligent Distribution of RIS Elements

open access: yesIEEE Open Journal of the Communications Society
In the recent past, extensive research has been conducted considering reconfigurable intelligent surface (RIS) as an important building block in wireless communication systems.
Sudhanshu Arya   +3 more
doaj   +1 more source

Reconfigurable Intelligent Surfaces for Energy Efficiency in Wireless Communication

open access: yes, 2019
The adoption of a Reconfigurable Intelligent Surface (RIS) for downlink multi-user communication from a multi-antenna base station is investigated in this paper.
Alexandropoulos, George C.   +4 more
core   +1 more source

Ray Tracing Based Radio Channel Modelling Applied to RIS [PDF]

open access: yes, 2023
We present a ray tracing based approach for deterministic radio channel modelling and as a target application simulations giving channel characteristics of a reconfigurable intelligent surface (RIS) in urban environment.
Juntti, Markku   +4 more
core  

Active RIS-Assisted MIMO-OFDM System: Analyses and Prototype Measurements [PDF]

open access: yes, 2023
In this study, we develop an active reconfigurable intelligent surface (RIS)-assisted multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) prototype compliant with the 5G New Radio standard at 3.5 GHz.
Chae, CB   +7 more
core  

Wireless Communication in the Presence of Illegal Reconfigurable Intelligent Surface Signal Leakage and Interference Attack [PDF]

open access: yes, 2022
Reconfigurable intelligent surface (RIS) is a promising technology in realizing a smart wireless communication system. RIS is a man-made surface consisting of massive passive reflecting elements, where each element can reflect the incident signal with ...
Deng, Y   +4 more
core   +1 more source

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

open access: yes, 2022
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.
Azeemi, Naeem Zafar   +1 more
openaire   +1 more source

n‐Type Polymer Radio Frequency Rectifiers Operating at 18.5 GHz

open access: yesAdvanced Materials, EarlyView.
Combining an n‐doped polymer semiconductor with wafer‐scale asymmetric planar electrodes featuring work function‐engineered contacts yields radio‐frequency diodes and rectifying circuits operating at up to 18.5 GHz. The devices combine scalable manufacturing with an operating frequency previously unattainable by large‐area organic electronics ...
Lazaros Panagiotidis   +19 more
wiley   +1 more source

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