Results 71 to 80 of about 380,841 (317)

Performance Analysis of CR-Enabled AmBC NOMA Under IQI and Sensitivity Constraints

IEEE Access
Considering tag sensitivity and in-phase and quadrature-phase imbalance (IQI), this paper investigates the reliability and security of a cognitive radio (CR)-aided ambient backscatter communication (AmBC) non-orthogonal multiple access (NOMA) system ...
Wenjing Zhao, Nanxi Li, Jing Guo, Jianchi Zhu, Yi Gu, Gongpu Wang, Chintha Tellambura   +6 more
doaj   +1 more source

Ultrahigh‐Yield, Multifunctional, and High‐Performance Organic Memory for Seamless In‐Sensor Computing Operation

Advanced Functional Materials, EarlyView.
Molecular engineering of a nonconjugated radical polymer enables a significant enhancement of the glass transition temperature. The amorphous nature and tunability of the polymer, arising from its nonconjugated backbone, facilitates the fabrication of organic memristive devices with an exceptionally high yield (>95%), as well as substantial ...
Daeun Kim, Jaehyoung Ko, Namju Kim, Quynh H. Nguyen, Hoyeon Lee, Joohwan Eo, Seongeon Jin, Ji Eon Kwon, Seung‐Yeol Jeon, Youngdo Jeong, Dongseok Kwon, Sung Gap Im, Sanghan Lee, Byung Chul Jang, Yongho Joo   +14 more
wiley   +1 more source

6G Wireless Communication Systems: Applications, Requirements, Technologies, Challenges, and Research Directions [PDF]

IEEE Open Journal of the Communications Society, 2019
The demand for wireless connectivity has grown exponentially over the last few decades. Fifth-generation (5G) communications, with far more features than fourth-generation communications, will soon be deployed worldwide.
M. Z. Chowdhury, M. Shahjalal, Shakil Ahmed, Y. Jang   +3 more
semanticscholar   +1 more source

Echoes: An Open RAN-Enabled System for Indoors Localization Using Smart Surfaces

IEEE Open Journal of the Communications Society
Indoor localization systems are poised to revolutionize mobile applications, enabling precise navigation, immersive augmented reality, and context-aware pervasive computing.
Pau Baguer, Josep Xavier Salvat Lozano, Guillermo Encinas-Lago, Placido Mursia, Esteban Municio, Marco Rossanese, Vincenzo Sciancalepore, Xavier Costa-Perez   +7 more
doaj   +1 more source

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

Advanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou, Yu Mao, Mengyao Chang, Ziyun Wang, Wenke Xie, Cuizhu Ye, Shanghai Wei, Lars Thomsen, Geoffrey I. N. Waterhouse   +8 more
wiley   +1 more source

When Large Language Model Agents Meet 6G Networks: Perception, Grounding, and Alignment [PDF]

IEEE wireless communications
AI agents based on multimodal large language models (LLMs) are expected to revolutionize human-computer interaction, and offer more personalized assistant services across various domains like healthcare, education, manufacturing, and entertainment ...
Minrui Xu, D. Niyato, Jiawen Kang, Zehui Xiong, Shiwen Mao, Zhu Han, Dong In Kim, K. B. Letaief   +7 more
semanticscholar   +1 more source

High-Throughput, Sorted QR Accelerator for Non-Linear Processing in Open-RAN Systems

IEEE Access
Open Radio Access Networks (Open-RANs) require cost- and energy-efficient solutions to facilitate their large-scale deployment. A significant concern in multiple-input multiple-output (MIMO) systems employing traditional linear processing is the ...
Thomas James Thomas, Marcin Filo, Konstantinos Nikitopoulos   +2 more
doaj   +1 more source

Structural Disorder, Octahedral Coordination, and 2-Dimensional Ferromagnetism in Anhydrous Alums

, 2008
The crystal structures of the triangular lattice, layered anhydrous alums KCr(SO4)2, RbCr(SO4)2 and KAl(SO4)2 are characterized by X-ray and neutron powder diffraction at temperatures between 1.4 and 773 K.
Bazarov, Bramwell, D.V. West, Fehrmann, Graeber, H.W. Zandbergen, Klevtsova, Kohler, Leclaire, Manoli, Oyetola, Pannetier, Piffard, Q. Huang, R.J. Cava, Serrano-Gonzalez, Serrano-Gonzalez, Shirane, T.M. McQueen, Toby, Vegard   +20 more
core   +1 more source

Joint Control of Radiated and Surface Waves via Space‐Time Coding Metasurfaces

Advanced Functional Materials, EarlyView.
A unified space‐time coding metasurface platform enables simultaneous control of radiated and surface‐confined waves across multiple harmonics. Demonstrated functionalities include multi‐frequency beam shaping; surface‐wave excitation, and hybrid multiplexing.
Zihao Dai, Yi Ning Zheng, Lei Zhang, Xiao Qing Chen, Giuseppe Castaldi, Tie Jun Cui, Vincenzo Galdi   +6 more
wiley   +1 more source

At the Dawn of Generative AI Era: A Tutorial-cum-Survey on New Frontiers in 6G Wireless Intelligence [PDF]

IEEE Open Journal of the Communications Society
As we transition from the 5G epoch, a new horizon beckons with the advent of 6G, seeking a profound fusion with novel communication paradigms and emerging technological trends, bringing once-futuristic visions to life along with added technical ...
A. Çelik, Ahmed M. Eltawil
semanticscholar   +1 more source