Results 31 to 40 of about 888,402 (309)

Experimental study of bit error rate of free space optics communications in laboratory controlled turbulence [PDF]

open access: yes, 2010
This paper reports experimental results for the performance of an free space optical (FSO) communication link employing different modulation schemes under the influence of the atmospheric scintillation.
Z. Ghassemlooy   +13 more
core   +1 more source

Restoration of Atmospheric Turbulence-degraded Images Based on Contrastive Learning [PDF]

open access: yesJisuanji kexue
Image degradation caused by atmospheric turbulence seriously affects the performance of downstream computer vision tasks such as object detection and image recognition.Existing deep learning-based image restoration models for atmospheric turbulence ...
MIAO Zhuang, CUI Haoran, ZHANG Qiyang, WANG Jiabao, LI Yang
doaj   +1 more source

Coherent polarization shift keying modulated free space optical links over a Gamma-Gamma turbulence channel [PDF]

open access: yes, 2011
Problem statement: The optical signal propagating through the Free Space Optical (FSO) channel suffers from irradiance and phase fluctuations caused by the atmospheric turbulence, which results in Bit Error Rate (BER) performance degradation ...
Ghassemlooy, Zabih   +7 more
core   +1 more source

Passenger comfort during formation flight within atmospheric turbulence [PDF]

open access: yes, 2012
Includes abstract.Includes bibliographical references.Formation flight is currently being investigated as a means to reduce drag and improve fuel efficiency in commercial aviation.
Bizinos, Nicholas
core   +1 more source

A statistical approach to surface renewal: The virtual chamber concept

open access: yesAgrosystems, Geosciences & Environment, 2021
In the stable conditions prevailing at night, concentrations of emitted gases (e.g., radon [Rn], carbon dioxide [CO2], methane [CH4], ammonia [NH3], and nitrous oxide [N2O]) build up at the surface, with intermittent interruptions due to the passage of ...
Bruce B. Hicks   +6 more
doaj   +1 more source

Structure of Atmospheric Turbulence

open access: yesAtmosphere, 2022
Turbulence is a phenomenon observed in the motions of fluids and gases [...]
Artem Yurievich Shikhovtsev   +1 more
doaj   +1 more source

Transmission Characteristics of Adaptive Compensation for Joint Atmospheric Turbulence Effects on the OAM-Based Wireless Communication System

open access: yesApplied Sciences, 2019
Atmospheric turbulence has an impact on the transmission of electromagnetic vortex waves with an orbital angular momentum (OAM) mode. In this paper, based on the joint atmospheric turbulence model, we examine the influence of atmospheric turbulence on ...
Jingxuan Yang   +4 more
doaj   +1 more source

Temporal Variations of the Turbulence Profiles at the Sayan Solar Observatory Site

open access: yesAtmosphere, 2019
The paper focuses on the development of the method to estimate the mean characteristics of the atmospheric turbulence. Using an approach based on the shape of the energy spectrum of atmospheric turbulence over a wide range of spatial and temporal scales,
Artem Shikhovtsev   +2 more
doaj   +1 more source

Free space optical system performance for a Gaussian beam propagating through non Kolmogorov weak turbulence [PDF]

open access: yes, 2009
Atmospheric turbulence has been described for many years by Kolmogorov's power spectral density model because of its simplicity. Unfortunately several experiments have been reported recently that show Kolmogorov theory is sometimes incomplete to describe
LARRY C. ANDREWS   +6 more
core   +1 more source

Quantitative Analysis of the Effect of Atmospheric Turbulence on a Bessel–Gaussian Beam

open access: yesPhotonics, 2023
Suppressing the impact of atmospheric turbulence on laser beam propagation is a bottleneck problem in the application of free space optical communications, with the primary difficulty being the lack of a quantitative description of the effect of ...
Wei Wen
doaj   +1 more source

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