Results 51 to 60 of about 3,109,645 (230)

A General and Efficient Framework for the Rapid Design of Miniaturized, Wideband, and High‐Bit RIS

Advanced Electronic Materials, EarlyView.
A general and efficient framework is proposed for the rapid design of high‐performance reconfigurable intelligent surfaces (RISs). This framework integrates advanced antenna design techniques and incorporates various load types, quantities, and values to achieve the design of high‐performance RISs.
Jun Wei Zhang, Zheng Xing Wang, Wanwan Cao, Zhen Jie Qi, Li Jie Wu, Han Qing Yang, Qun Yan Zhou, Si Ran Wang, Hui Dong Li, Jun Yan Dai, Jiang Luo, Jun Wei Wu, Jia Nan Zhang, Zhen Zhang, Qiang Cheng   +14 more
wiley   +1 more source

Joint Robust Design for Secure AF Relay Networks With SWIPT

IEEE Access, 2017
In this paper, we investigate the physical layer security for amplify-and-forward relay networks with simultaneous wireless information and power transfer.
Hehao Niu, Bangning Zhang, Daoxing Guo, Yuzhen Huang   +3 more
doaj   +1 more source

Multifocal skull-compensated transcranial focused ultrasound system for neuromodulation applications based on acoustic holography

Microsystems & Nanoengineering, 2023
Transcranial focused ultrasound stimulation is a promising therapeutic modality for human brain disorders because of its noninvasiveness, long penetration depth, and versatile spatial control capability through beamforming and beam steering. However, the
Geon Kook, Yehhyun Jo, Chaerin Oh, Xiaojia Liang, Jaewon Kim, Sang-Mok Lee, Subeen Kim, Jung-Woo Choi, Hyunjoo Jenny Lee   +8 more
doaj   +1 more source

Abnormal resting-state functional connectivity underlies cognitive and clinical symptoms in patients with schizophrenia

Frontiers in Human Neuroscience, 2023
IntroductionThe cognitive and psychotic symptoms in patients with schizophrenia (SZ) are thought to result from disrupted brain network connectivity.MethodsWe capitalize on the high spatiotemporal resolution of magnetoencephalography imaging (MEG) to ...
Yingxin Jia, Namasvi Jariwala, Leighton B. N. Hinkley, Srikantan Nagarajan, Karuna Subramaniam   +4 more
doaj   +1 more source

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

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

History of acoustic beamforming [PDF]

, 2006
The development of the beamforming method (also called microphone antenna, phased array of microphones, acoustic telescope, or acoustic camera) is reviewed in this paper.
Michel, U., Ulf Michel
core  

An Efficient Scheme for Broadband Adaptive Beamforming [PDF]

, 1999
This paper introduces an oversampled subband approach to linearly constrained minimum variance adaptive broadband beamforming. This method is motivated by the considerable reduction in computation over fullband implementation and resulting large ...
S. Weiss, I.K. Proudler, Weiss, S., R.W. Stewart, Schabert, M, Hoffman, M W, Stewart, R.W., Stewart, R W, M.W. Hoffman, Schabert, Marion, Hoffman, Michael, Weiss, Stephan, Proudler, I., Weiss, S, Schabert, M., Proudler, I K, M. Schabert, Hoffman, M.W., Stewart, Robert   +18 more
core   +1 more source

Dynamic Role Allocation in Cooperative Secure UAV-ISAC Networks

IEEE Open Journal of the Communications Society
This paper proposes a novel physical-layer security framework for multi-UAV Integrated Sensing and Communication (ISAC) networks operating in adversarial environments.
Mahmoud M. Selim, Mohamed Rihan, Armin Dekorsy, M. A. Aboulhassan   +3 more
doaj   +1 more source

Recent Advances in Programmable Metasurfaces and Meta‐Devices

Advanced Electronic Materials, EarlyView.
Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao, Chong He, Nan Wang, Liming Si, Weiren Zhu   +4 more
wiley   +1 more source