Results 121 to 130 of about 231,801 (304)
Advanced Science, EarlyView.This work provides a multifunctional programmable transmissive metasurface with phase and amplitude manipulation capability in the sub‐6G band. By applying different coding strategies, the proposed metasurface can realize vortex beam generation, holographic imaging under phase coding mode, and multi‐beam forming in phase‐amplitude joint coding mode ...
Hao Tian Shi +8 more
wiley +1 more source
Performance of MB-OFDM UWB and WiMAX IEEE 802.16e converged radio-over-fiber in PON [PDF]
, 2009 Experimental results about the performance of converged radio-over- fiber transmission including multiband- OFDM UWB and WiMAX 802.16e wireless over a passive optical network are reported in this paper. The experimental study indicates that UWB and WiMAX
Beltran, Marta +3 more
core
Advanced Science, EarlyView.This study introduces a novel metamaterial absorber integrating water as a lossy medium with patterned indium tin oxide (ITO) films to achieve simultaneous optical transparency and ultra‐wideband electromagnetic absorption over 0.52‐40 GHz. It effectively overcomes the limitations of conventional opaque and bulky shielding materials, offering a ...
Xiaojun Huang +5 more
wiley +1 more source
Dynamic Spectrum Access With Physical Layer Security: A Game-Based Jamming Approach
IEEE Access, 2018 The paper investigates the issue of physical layer security in spectrum overlay networks. First, in order to enhance security performance of the primary system, the secondary users are motivated to act as friendly jamming nodes with the compensation of ...
Yanjun Yao +3 more
doaj +1 more source
Investigation of turbulence effect on the free space optical link for ground-to-train communications [PDF]
, 2011 There is a growing demand for high mobility and ultrafast internet/data services which drives the motivation for free space optical (FSO) communications for high speed trains.
Ghassemlooy, Zabih +4 more
core
Advanced Science, EarlyView.Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel +3 more
wiley +1 more source
CAAI Transactions on Intelligence Technology, EarlyView., 2023 Abstract The Internet of Things is emerging as a crucial technology in aiding humans and making their lives easier. Among the human population, a large percentage of people suffer from disabilities resulting in challenges in everyday life particularly people with visual disabilities.
Hania Tarik +8 more
wiley +1 more source
IEEE Photonics Journal, 2017 In addition to large path loss, non-line-of-sight (NLOS) optical wireless scattering communication suffers time dispersion due to the multipath nature of the NLOS scattering channel.
Yu Sun +3 more
doaj +1 more source
XOR‐Logic Phase Coding Programmable Metasurface for Low Power‐Consumption Systems
Advanced Science, EarlyView.By leveraging XOR logic, the biasing‐network complexity of 2D programmable metasurfaces is reduced from m×n to m+n through efficient row‐column control. This enables versatile functions including beam deflection and beamforming, facilitating applications in wireless communications and beyond.
Ruichao Zhu +10 more
wiley +1 more source
IET Networks, EarlyView., 2022 Abstract Everything can be connected in the Internet of Things (IoTs) technology that enables efficient communication between connected objects. IoTs industry‐based meta‐heuristic and mining algorithms, which are considered an important field of Artificial Intelligence will be used to construct a healthcare application in this study for lowering costs,
Muhaned Al‐Hashimi +4 more
wiley +1 more source