Results 1 to 10 of about 496,345 (292)

Structure Radio Beam Construction in Azimuthal Domain [PDF]

IEEE Access, 2020
Structure radio beams with diverse radiation patterns exhibit huge potentials in many applications. In this paper, we propose a plane spiral orbital angular momentum (PS-OAM) based structure radio beam construction scheme, in which several PS-OAM waves ...
Zhixia Wang, Shilie Zheng, Xiaowen Xiong, Zelin Zhu, Yuqi Chen, Xianbin Yu, Xiaofeng Jin, Xianmin Zhang   +7 more
doaj   +2 more sources

Hierarchical MAB Framework for Energy-Aware Beam Training for Near-Field Communications [PDF]

Sensors
For XL-MIMO multi-user frequency division duplex systems, this paper proposes a near-field beam training scheme using a two-phase combinatorial multi-armed bandit (MAB) framework.
Yunxing Xiang, Yi Yan, Yunchao Song, Jing Gao, Xiaohui You, Jun Wang, Huibin Liang, Yixin Jiang   +7 more
doaj   +2 more sources

Beam Domain MIMO-OFDM Optical Wireless Communications With PAPR Reduction

IEEE Photonics Journal, 2023
Multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM), confirmed as an efficient technique, has been applied in optical wireless communications (OWCs) to improve the transmission rate.
Chen Sun, Jia Zhao, Jiaheng Wang, Liang Xia, Xiqi Gao, Qixing Wang   +5 more
doaj   +1 more source

Manipulation of curved beams using beam-domain optimization

Optics Express, 2022
An efficient scheme for the design of aperture fields (distributed sources) that radiate arbitrary trajectory curved (accelerating) beams, with enhanced controllability of various beam features, is presented. The scheme utilizes a frame-based phase-space representation of aperture fields to overcome the main hurdles in the design for large apertures ...
Gabriel Lasry, Yaniv Brick, Timor Melamed   +2 more
openaire   +2 more sources

A Multi-Frequency Tomographic Inverse Scattering Using Beam Basis Functions

Sensors, 2022
We present an overview of a beam-based approach to ultra-wide band (UWB) tomographic inverse scattering, where beam-waves are used for local data-processing and local imaging, as an alternative to the conventional plane-wave and Green’s function ...
Ram Tuvi
doaj   +1 more source

Controllability of a fluid-structure interaction system coupling the Navier–Stokes system and a damped beam equation

Comptes Rendus. Mathématique, 2023
We show the local null-controllability of a fluid-structure interaction system coupling a viscous incompressible fluid with a damped beam located on a part of its boundary.
Buffe, Rémi, Takahashi, Takéo
doaj   +1 more source

A Time-Domain Finite-Difference Method for Bending Waves on Infinite Beams on an Elastic Foundation

Acoustics, 2022
To model the vibration and structure-borne sound excitation and propagation of a railway rail, it can be modeled as an infinite beam on an elastic foundation.
Katja Stampka, Ennes Sarradj
doaj   +1 more source

Spatial Domain Interactions between Ultraweak Optical Beams [PDF]

Physical Review Letters, 2013
17 pages, 5 ...
Khadka, Utsab, Sheng, Jiteng, Xiao, Min
openaire   +3 more sources

Manipulating Ferroelectric Domains in Nanostructures Under Electron Beams [PDF]

Physical Review Letters, 2013
Freestanding BaTiO3 nanodots exhibit domain structures characterized by distinct quadrants of ferroelastic 90 domains in transmission electron microscopy (TEM) observations. These differ significantly from flux-closure domain patterns in the same systems imaged by piezoresponse force microscopy.
Ahluwalia, R., Ng, N., Schilling, A., McQuaid, R.G.P, Evans, D. M., Gregg, J. M., Srolovitz, D. J., Scott, J. F.   +7 more
openaire   +6 more sources

Time domain beam propagation method for the simulation of temporal solitons in periodic media [PDF]

, 1995
A time domain beam propagation method for the simulation of optical pulses propagating through Kerr-nonlinear structures is presented.
Driessen, A., Hoekstra, Hugo, Horst, F., Horst, F., Popma, T.J.A.   +4 more
core   +7 more sources