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Emission in spectral lines can provide unique information on interstellar turbulence. Doppler shifts due to supersonic motions contain information on turbulent velocity field which is otherwise difficult to measure. However, the problem of…

天体物理学 · 物理学 2016-08-30 A. Lazarian

In underwater wireless optical communications (UWOC), the random obstruction of light propagation by air bubbles can cause fluctuations in the incoming light intensity of a receiver. In this paper, we propose a statistical model for…

信息论 · 计算机科学 2020-06-25 Myoungkeun Shin , Ki-Hong Park , Mohamed-Slim Alouini

In this paper, we jointly consider the downlink simultaneous wireless information and power transfer (SWIPT) and uplink information transmission in unmanned aerial vehicle (UAV)-assisted millimeter wave (mmWave) cellular networks, in which…

信号处理 · 电气工程与系统科学 2021-04-19 Xueyuan Wang , M. Cenk Gursoy

In the framework of the focusing Nonlinear Schrodinger (NLS) equation we study numerically the nonlinear stage of the modulation instability (MI) of the condensate. As expected, the development of the MI leads to formation of "integrable…

可精确求解与可积系统 · 物理学 2015-09-15 D. S. Agafontsev , V. E. Zakharov

Ultrawideband (UWB) technology has attracted a lot of attention for indoor and outdoor positioning systems due to its high accuracy and robustness in non-line-of-sight (NLOS) environments. However, UWB signals are affected by multipath…

信号处理 · 电气工程与系统科学 2023-08-16 Mohammed Dahiru Buhari , Tri Bagus Susilo , Irfan Khan , Bashir Olaniyi Sadiq

Near-field (NF) communications is receiving renewed interest in the context of multiple-input multiple-output (MIMO) systems involving large physical apertures with respect to the signal wavelength. While line-of-sight (LOS) links are…

信号处理 · 电气工程与系统科学 2025-11-26 Mohamadreza Delbari , George C. Alexandropoulos , Robert Schober , H. Vincent Poor , Vahid Jamali

Extensive numerical simulations were performed to investigate all stages of modulation instability development from the initial pulse of pico-second duration in photonic crystal fiber: quasi-solitons and dispersive waves formation, their…

斑图形成与孤子 · 物理学 2015-05-18 Dmitry Agafontsev

We discuss averaged turbulence modeling of multi-scales of length for an incompressible Newtonian fluid, with the help of the maximum information principle. We suppose that there exists a function basis to decompose the turbulent…

流体动力学 · 物理学 2010-09-10 L. Tao , M. Ramakrishna

In this paper, we study ultra-reliable and low-latency communication (URLLC) under fading using multiple frequency or time bins. We investigate an approach to find an upper-bound on the packet error rate when a finite-length code is used.…

信息论 · 计算机科学 2019-04-08 Jinho Choi

Optical turbulence occurring in the oceanic waters may be detrimental for light beams used in the short-link communication and sensing systems, and, in particular, in underwater LIDARs. We develop a theory capable of predicting the passage…

大气与海洋物理 · 物理学 2020-01-03 Olga Korotkova , Jin-Ren Yao

We design an optical feedback network making use of machine learning techniques and demonstrate via simulations its ability to correct for the effects of turbulent propagation on optical modes. This artificial neural network scheme only…

信号处理 · 电气工程与系统科学 2018-06-22 Sanjaya Lohani , Ryan T. Glasser

We study the evolution of higher-order nonclassicality and entanglement criteria in atmospheric fluctuating-loss channels. By formulating input-output relations for the matrix of moments, we investigate the influence of such channels on the…

量子物理 · 物理学 2017-01-25 M. Bohmann , J. Sperling , A. A. Semenov , W. Vogel

Statistical models are employed to characterize the clutter in the radar and the reflective signals of the telecommunication receivers. End to this, Rayliegh distribution is the simplest fading models in NLOS channels possessing…

信号处理 · 电气工程与系统科学 2019-01-23 Zabihollah Hasanshahi , Paeiz Azmi , Mohammad Khajezadeh

Observations reveal a uniform Kolmogorov turbulence throughout the diffuse ionized interstellar medium (ISM) and supersonic turbulence preferentially located in the Galactic plane. Correspondingly, we consider the Galactic distribution of…

星系天体物理 · 物理学 2017-01-25 Siyao Xu , Bing Zhang

In most countries, small (<2 kg) and medium (<25 kg) size unmanned aerial vehicles (UAVs) must fly at low altitude, below 120 m, and with permanent radio communications with ground for control and telemetry. These communications links can…

信号处理 · 电气工程与系统科学 2025-02-26 Cesar Briso , Cesar Calvo , Zhuangzhuang Cui , Lei Zhang , Youyun Xu

This published paper investigates the distributed tracking control problem for a class of Euler-Lagrange multi-agent systems when the agents can only measure the positions. In this case, the lack of the separation principle and the strong…

系统与控制 · 电气工程与系统科学 2019-07-02 Qingkai Yang , Hao Fang , Jie Chen , Zhong-Ping Jiang , Ming Cao

Wideband systems experience significant inter-channel stimulated Raman scattering (ISRS) and channel-dependent losses. Due to the non-uniform attenuation profile, the combined effects of ISRS and fiber loss can only be accurately estimated…

The free-space optical channel has the potential to facilitate inexpensive, wireless communication with fiber-like bandwidth under short deployment timelines. However, atmospheric effects can significantly degrade the reliability of a…

信息论 · 计算机科学 2008-04-02 Nick Letzepis , Albert Guillen i Fabregas

We adapt to neutrino physics a general formulation for particle propagation in fluctuating media, initially developed for applications to electromagnetism and neutron optics. In leading approximation this formalism leads to the usual MSW…

高能物理 - 唯象学 · 物理学 2014-11-17 C. P. Burgess , D. Michaud

The asymptotic mutual information (MI) analysis for multiple-input multiple-output (MIMO) systems over double-scattering channels has achieved engaging results, but the convergence rates of the mean, variance, and the distribution of the MI…

信息论 · 计算机科学 2023-01-18 Xin Zhang , Shenghui Song