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In this article, a network model incorporating both line-of-sight (LOS) and non-line-of-sight (NLOS) transmissions is proposed to investigate impacts of blockages in urban areas on heterogeneous network coverage performance. Results show…

网络与互联网体系结构 · 计算机科学 2016-11-17 Bin Yang , Guoqiang Mao , Xiaohu Ge , Hsiao-Hwa Chen , Tao Han , Xuefei Zhang

A statistical model for the polarization of pulsar radio emission is enhanced to account for the heavy modulation of the emission, the possible covariance of the Stokes parameters, and the observed asymmetries in the distributions of total…

高能天体物理现象 · 物理学 2022-10-12 M. M. McKinnon

A system of ${N_{osc}}$ charged oscillators interacting with the electromagnetic field, spatially confined in a 3D lattice of sub-wavelength dimension, can condense into a superradiant coherent state if appropriate density and frequency…

综合物理 · 物理学 2023-10-24 L. Gamberale , G. Modanese

The advent of ultra-massive multiple-input-multiple output systems holds great promise for next-generation communications, yet their channels exhibit hybrid far- and near- field beam-squint (HFBS) effect. In this paper, we not only overcome…

信号处理 · 电气工程与系统科学 2024-11-11 Zhen Gao , Xingyu Zhou , Boyu Ning , Yu Su , Tong Qin , Dusit Niyato

Error performance is one of the main performance measures and derivation of its closed-form expression has proved to be quite involved for certain systems. In this letter, a unified closed-form expression, applicable to different binary…

Turbulence is a key element of the dynamics of astrophysical fluids, including those of interstellar medium, clusters of galaxies and circumstellar regions. Turbulent motions induce Doppler shifts of observable emission and absorption lines…

天体物理学 · 物理学 2009-03-27 A. Chepurnov , A. Lazarian

Small-scale fluctuations of different tracers of the interstellar the medium can be used to study the nature of turbulence in astrophysical scales. Of these, the `continuum' emission traces the fluctuations integrated along the line of…

星系天体物理 · 物理学 2019-01-30 Samir Choudhuri , Nirupam Roy

It was recently suggested by Boldyrev & Gwinn that the characteristics of radio scintillations from distant pulsars are best understood if the interstellar electron-density fluctuations that cause the time broadening of the radio pulses…

天体物理学 · 物理学 2010-11-11 Stanislav Boldyrev , Arieh Konigl

Turbulence is a crucial component of dynamics of astrophysical fluids dynamics, including those of ISM, clusters of galaxies and circumstellar regions. Doppler shifted spectral lines provide a unique source of information on turbulent…

天体物理学 · 物理学 2016-01-27 A. Lazarian

We investigate the impact of higher-order modulation formats on the sensing performance of single-carrier joint communication and sensing (JCAS) systems. Several separate components such as a beamformer, a modulator, a target detector, an…

信号处理 · 电气工程与系统科学 2025-10-01 Charlotte Muth , Benedikt Geiger , Daniel Gil Gaviria , Laurent Schmalen

Modulating retroreflectors (MRRs) offer a promising pathway to low-complexity and energy efficient asymmetric optical inter-satellite link (OISL) for small spacecrafts, such as CubeSats. In this paper, we develop a unified statistical…

光学 · 物理学 2026-01-21 Makafui Avevor , Hossein Safi , Harald Haas , Iman Tavakkolnia

An alternative approach to ultrasound computed tomography (USCT) for medical imaging is proposed, with the intent to (i) shorten acquisition time for devices with a large number of emitters, (ii) eliminate the calibration step, and (iii)…

医学物理 · 物理学 2022-01-25 Ines Elisa Ulrich , Christian Boehm , Andrea Zunino , Cyrill Bösch , Andreas Fichtner

Free space optics (FSO) is a promising solution for the need to very high data rate point-to point communication. FSO communication technology became popular due to its large bandwidth potential, unlicensed spectrum, excellent security and…

光学 · 物理学 2012-03-15 Bobby Barua , Tanzia Afrin Haque , Md. Rezwan Islam

We investigate interference and correlation effects when several detuned emitters are placed along a one-dimensional photonic waveguide. Such a setup allows multiple interactions between the photons and the strongly coupled emitters, and…

量子物理 · 物理学 2017-07-24 Yao-Lung L. Fang , Harold U. Baranger

We examine the general question of statistical changes experienced by ensembles of nonlinear random waves propagating in systems ruled by integrable equations. In our study that enters within the framework of integrable turbulence, we…

光学 · 物理学 2016-08-24 S. Randoux , P. Walczak , M. Onorato , P. Suret

Isothermal fluid turbulence simulations have been performed in the edge and scrape-off-layer (SOL) of an analytic stellarator configuration with an island divertor, thereby providing numerical insight into edge turbulence in regions around…

等离子体物理 · 物理学 2024-03-28 Brendan Shanahan , David Bold , Ben Dudson

In this paper, we provide a performance analysis for practical unmanned aerial vehicle (UAV)-enabled networks. By considering both line-of-sight (LoS) and non-line-of-sight (NLoS) transmissions between aerial base stations (BSs) and ground…

网络与互联网体系结构 · 计算机科学 2018-04-04 Chang Liu , Ming Ding , Chuan Ma , Qingzhi Li , Zihuai Lin , Ying-Chang Liang

In unmanned aerial vehicle (UAV) assisted millimeter wave (mmWave) communication, appropriate user-UAV association is crucial for improving system performance. In mmWave communication, user throughput largely depends on the line of sight…

网络与互联网体系结构 · 计算机科学 2025-05-26 Siddhanta Parial , Sasthi C. Ghosh , Anil K. Ghosh

The parallel fading channel, which consists of finite number of subchannels, is very important, because it can be used to formulate many practical communication systems. The outage probability, on the other hand, is widely used to analyze…

信息论 · 计算机科学 2013-07-19 Bo Bai , Wei Chen , Khaled B. Letaief , Zhigang Cao

Passive non-line-of-sight (NLOS) imaging has witnessed rapid development in recent years, due to its ability to image objects that are out of sight. The light transport condition plays an important role in this task since changing the…

计算机视觉与模式识别 · 计算机科学 2025-01-03 Jiarui Zhang , Ruixu Geng , Xiaolong Du , Yan Chen , Houqiang Li , Yang Hu
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