Results 41 to 50 of about 14,424 (285)

Modeling Analysis for Downlink RIS-UAV-Assisted NOMA over Air-to-Ground Line-of-Sight Rician Channels

Drones
This paper proposes a drone-assisted NOMA communication system equipped with a reconfigurable intelligent surface (RIS). Given the Line-of-Sight nature of the Air-to-Ground link, a more realistic Rician fading environment is chosen for the study of ...
Suoping Li, Xiangyu Liu, Jaafar Gaber, Guodong Pan   +3 more
doaj   +1 more source

Trajectory Optimization for Cellular-Enabled UAV With Connectivity Outage Constraint

IEEE Access, 2020
This paper studies the trajectory optimization problem of a single cellular-enabled unmanned aerial vehicle (UAV), taking into account the outage performance of the entire trajectory.
Yu-Jia Chen, Da-Yu Huang
doaj   +1 more source

Defeating Jamming Using Outage Performance Aware Joint Power Allocation and Access Point Placement in Uplink Pairwise NOMA

IEEE Open Journal of the Communications Society, 2021
In this paper, an uplink pairwise Non-Orthogonal Multiple Access (NOMA) scenario using a mobile access point (AP) or an unmanned aerial vehicle in the presence of a jamming attack is considered.
Van-Lan Dao, Le-Nam Hoang, Svetlana Girs, Elisabeth Uhlemann   +3 more
doaj   +1 more source

Advances and Perspectives in Graphene‐Based Quantum Dots Enabled Neuromorphic Devices

Advanced Science, EarlyView.
Graphene‐based QDs are zero‐dimensional carbon nanomaterials with pronounced quantum confinement and tunable electronic structures. Herein, we summarize their synthesis strategies and functionalization methods, and highlight their functional roles and operating mechanisms in devices, as well as recent advances in neuromorphic electronics. We anticipate
Yulin Zhen, Wei Zeng, Zherui Zhao, JiYu Zhao, Ziyan Huang, Zhuo Chen, Kui Zhou, Guanglong Ding, Su‐Ting Han, Ye Zhou   +9 more
wiley   +1 more source

Outage performance of secure multicasting in the presence of multiple eavesdroppers [PDF]

2015 Eighth International Conference on Mobile Computing and Ubiquitous Networking (ICMU), 2015
Recently, there has been a growing interest in applying multiple antennas to achieve information-theoretic security in wireless communication networks. In this paper, we consider the transmission of common confidential data from a single-antenna transmitter to multiple multi-antenna receivers in the presence of multiple multi-antenna eavesdroppers ...
Jinxiao Zhu, Yin Chen 0001, Yoshitaka Nakamura, Xiaohong Jiang 0001, Osamu Takahashi, Norio Shiratori   +5 more
openaire   +1 more source

Interfacial Growth of 420 nm Ultrathin and Dense MOFs for Composite Electrolyte to Reduce Li+ Conduction Resistance and Inhibit Lithium Dendrite

Advanced Science, EarlyView.
In this work, an interfacial growth method using PVDF‐HFP enables controlled permeation of 2‐methylimidazole to react with Co2+, forming an ultrathin (420 nm) ZIF‐67 layer by precisely tuning the reaction time. This dense layer promotes lithium salt dissociation and suppresses dendrite growth, while its ultrathin nature reduces Li+ transport resistance,
Xinhong Qi, Zhaokai Rui, Shichen Zhang, Yihang Li, Ziyi Xin, Mengjuan Li, Lu Gao, Yuchen He, Xiaobin Jiang, Xiangcun Li, Gaohong He   +10 more
wiley   +1 more source

Asymptotic outage performance of power allocation in block-fading channels [PDF]

, 2008
We characterize the asymptotic outage performance of power allocation techniques for systems with average power constraints. We show that the outage diversity of a system with average power constraints can be obtained from the diversity of the ...
Rasmussen, L., Guillen, I.F.A., Nguyen, D.K.   +2 more
core   +3 more sources

Performance of multiple-input multiple-output wireless communications systems using distributed antennas [PDF]

, 2005
In this contribution we propose and investigate a multiple-input multiple-output (MIMO) wireless communications system, where multiple receive antennas are distributed in the area covered by a cellular cell and connected with the base-station (BS).
Yang, Lie-Liang, Fang, Wei, Chen, X.-C.
core  

Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective

Advanced Electronic Materials, EarlyView.
Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe, Ivan Iudice, Giuseppe Castaldi, Marco Di Renzo, Vincenzo Galdi   +4 more
wiley   +1 more source

Organizational Sensemaking Theory Perspective of Developing AI‐Driven Strategies for Sustainability Initiatives

Business Strategy and the Environment, EarlyView.
ABSTRACT Although artificial intelligence (AI) is increasingly being touted to assist organizations, AI integration for sustainability efforts has been limited AND sporadic and tends to follow an ad hoc strategy. The existing literature therein focuses on the technological capabilities of AI, overlooking how organizations make sense of and ...
Amanda Balasooriya, Darshana Sedera
wiley   +1 more source