Results 101 to 110 of about 332,498 (295)

Reconfigurable Intelligent Surfaces for 6G Systems: Principles, Applications, and Research Directions [PDF]

arXiv, 2020
Reconfigurable intelligent surfaces (RISs) or intelligent reflecting surfaces (IRSs), are regarded as one of the most promising and revolutionizing techniques for enhancing the spectrum and/or energy efficiency of wireless systems. These devices are capable of reconfiguring the wireless propagation environment by carefully tuning the phase shifts of a ...
arxiv  

Zero-Energy Reconfigurable Intelligent Surfaces (zeRIS)

IEEE Transactions on Wireless Communications
A primary objective of the forthcoming sixth generation (6G) of wireless networking is to support demanding applications, while ensuring energy efficiency. Programmable wireless environments (PWEs) have emerged as a promising solution, leveraging reconfigurable intelligent surfaces (RISs), to control wireless propagation and deliver exceptional quality-
Dimitrios Tyrovolas, Sotiris A. Tegos, Vasilis K. Papanikolaou, Yue Xiao, Prodromos-Vasileios Mekikis, Panagiotis D. Diamantoulakis, Sotiris Ioannidis, Christos K. Liaskos, George K. Karagiannidis   +8 more
openaire   +3 more sources

DNA‑Directed Assembly of Photonic Nanomaterials for Diagnostic and Therapeutic Applications

Advanced Materials, EarlyView.
DNA‐directed assembly offers a powerful strategy for constructing structured photonic nanomaterials with precise spatial control. This review provides a comprehensive overview of recent advancements in DNA‐assembled photonic nanomaterials for diagnostics and therapeutics, highlighting key design principles, functionalization strategies, and optical ...
Longjiang Ding, Bing Liu, Andreas Peil, Sisi Fan, Jie Chao, Na Liu   +5 more
wiley   +1 more source

Throughput maximization for irregular reconfigurable intelligent surface assisted NOMA systems

EURASIP Journal on Advances in Signal Processing, 2023
Reconfigurable intelligent surface (RIS) is an emerging technology to improve the spectral efficiency of wireless communication systems. However, the high complexity of beam design and the non-negligible overhead associated with RIS limit the number of ...
Weilin Zhang, Lingyi Wang, Hangtao Mao, Zi Wang, Wei Wu   +4 more
doaj   +1 more source

Reconfigurable Intelligent Surface Enabled Spatial Modulation for Visible Light Communications

IEEE Photonics Journal, 2023
An important issue in visible light communications (VLC) is how to boost up the system throughput even when the line-of-sight (LOS) link is blocked by obstacles. In this paper, we propose reconfigurable intelligent surface (RIS) based spatial modulation (
Pengfei Shen, Lu Lu
doaj   +1 more source

Reconfigurable Intelligent Surface -Assisted Ambient Backscatter Communications -- Experimental Assessment [PDF]

arXiv, 2021
Sixth generation (6G) mobile networks may include new passive technologies, such as ambient backscatter communication or the use of reconfigurable intelligent surfaces, to avoid the emission of waves and the corresponding energy consumption. On the one hand, a reconfigurable intelligent surface improves the network performance by adding electronically ...
arxiv  

Transforming Healthcare: Intelligent Wearable Sensors Empowered by Smart Materials and Artificial Intelligence

Advanced Materials, EarlyView.
Wearable sensors, empowered by AI and smart materials, revolutionize healthcare by enabling intelligent disease diagnosis, personalized therapy, and seamless health monitoring without disrupting daily life. This review explores cutting‐edge advancements in smart materials and AI‐driven technologies that empower wearable sensors for diagnostics and ...
Shuwen Chen, Shicheng Fan, Zheng Qiao, Zixiong Wu, Baobao Lin, Zhijie Li, Michael A. Riegler, Matthew Yu Heng Wong, Arve Opheim, Olga Korostynska, Kaare Magne Nielsen, Thomas Glott, Anne Catrine T. Martinsen, Vibeke H. Telle‐Hansen, Chwee Teck Lim   +14 more
wiley   +1 more source

Overview of reconfigurable intelligent surface for new-generation mobile communication

Dianxin 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

Impact of Reconfigurable Intelligent Surface Geometry on Communication Performance

IEEE Wireless Communications Letters, 2023
When beamforming is applied at the transmitter, only part of reconfigurable intelligent surfaces (RISs) will be active, and it becomes indispensable to study the impact of RIS geometry. This letter aims at evaluating RIS geometry, ranging from linear (1D), and planar (2D), to cylindrical (3D) structures.
Zhuangzhuang Cui, Sofie Pollin
openaire   +2 more sources

Advancement in Colloidal Metasurfaces: Approaches for Scalable Photonic Devices

Advanced Materials Interfaces, EarlyView.
This perspective explores colloidal metasurfaces composed of plasmonic and emitting nanoparticles assembled by laser interference lithography and template‐assisted self‐assembly methods. Precise design strategies achieve directional emission, low‐threshold lasing, and tunable photonic bandgaps.
Sezer Seçkin, Swagato Sarkar, Tobias A.F. König   +2 more
wiley   +1 more source