Exploració per tema "Atmospheric turbulence"
Ara es mostren els items 21-36 de 36
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Global intermittency and collapsing turbulence in a stratified planetary boundary layer
(2014-07-19)
Article
Accés obert -
Hybrid testbed of a free-space laser communications system for atmospheric turbulence compensation
(Universitat Politècnica de Catalunya, 2016-07-27)
Treball Final de Grau
Accés restringit per decisió de l'autorIn the last few years free-space laser communications have become a feasible and high-bandwidth wireless alternative to fiber optic cabling and radio frequency (RF) systems due to its extremely robustness against interference ... -
Inter-island optical link tests
(1990-05)
Article
Accés obert -
Mezcla turbulenta por rejilla oscilante : nuevos experimentos y técnicas de alta resolución
(2015-07-05)
Report de recerca
Accés obertWe present several experimental studies on Turbulent Mixing produced by the advance of a density interface produced by brine when an oscilating grid produces zero-mean turbulence at a certain vertical distance. The older ... -
Ocean classification of dynamical structures detected by SAR and spectral methods
(European Space Agency (ESA), 2016)
Text en actes de congrés
Accés obertWe discuss a taxonomy of different dynamical featuresin the ocean surface and provide some eddy and frontstatistics, as well as describing some events detected byseveral satellites and even with additional cruise observationsand ... -
Optimal modes for spatially multiplexed free-space communications
(Institute of Electrical and Electronics Engineers (IEEE), 2022)
Text en actes de congrés
Accés restringit per política de l'editorialThere exist optimal modes for free-space spatial-mode multiplexing with minimum degradation, under a realistic assumption that a transmitter knows the statistics of propagated fields. Using these modes as transmit and ... -
Parametric UAS leg design for atmostpheric structure investigation
(Universitat Politècnica de Catalunya, 2015-05-29)
Treball Final de Grau
Accés obertTornadoes are one of the most devastating atmospheric phenomena worldwide. Only in the EEUU, there are more than 1400 tornadoes yearly. Despite the great effort trying to understand and predict the behavior and path of the ... -
Performance analysis of satellite-to-ground downlink optical communications with spatial diversity over Gamma–Gamma atmospheric turbulence
(2015-12-08)
Article
Accés restringit per política de l'editorialThe performances of satellite-to-ground downlink optical communications over Gamma–Gamma distributed turbulence are studied for a multiple-aperture receiver system. Equal gain-combining (EGC) and selection-combining (SC) ... -
Project design third axis of paragliding simulator
(Universitat Politècnica de Catalunya / Universidade de Fortaleza, 2014)
Projecte/Treball Final de Carrera
Accés obert
Realitzat a/amb: Universidade de FortalezaParagliding accidents are often caused by unpredictable weather conditions that may produce air turbulence. Air turbulence is equally dangerous to both experienced and inexperienced pilots alike, as it is invisible and can ... -
Proof of concept for adaptive sequential optimization of free-space communication receivers
(Optical Society of American (OSA), 2019-07-05)
Article
Accés obertIn a downlink scenario, the performance of laser satellite communications is limited due to atmospheric turbu- lence, which causes fluctuations in the intensity and the phase of the received signal, leading to an increase ... -
Reconstruction subgrid models for nonpremixed combustion
(2003-09-16)
Article
Accés obertLarge-eddy simulation of combustion problems involves highly nonlinear terms that, when filtered, result in a contribution from subgrid fluctuations of scalars, Z, to the dynamics of the filtered value. This subgrid ... -
Simulating atmospheric turbulence: Code development and educational applications
(Universitat Politècnica de Catalunya, 2022-04-29)
Comunicació de congrés
Accés obertEarth atmosphere turbulence affects many areas of interest related with Space studies, such as optical communications or Astronomy. In fact, it is a key topic for such applications and, thus, it is important for students ... -
Temporal analysis of laser beam propagation in the atmosphere using computer-generated long phase screens
(2008-02-04)
Article
Accés obertTemporal analysis of the irradiance at the detector plane is intended as the first step in the study of the mean fade time in a free optical communication system. In the present work this analysis has been performed for a ... -
Two applications for teaching and Telecommunication Engineering students the atmospheric effects on the optical channels. Applications in Astronomy, Mechanical Engineering and Telecommunications
(Universitat Politècnica de Catalunya, 2022-09)
Text en actes de congrés
Accés obertAtmospheric turbulence is one of the limiting phenomena in interesting applications and fields such of optical telecommunications and Observational Astronomy. Both Telecommunication and Aerospace Engineering students may ... -
Two applications for teaching Telecommunication Engineering students the atmospheric effects on the optical channels. Applications in Astronomy, Mechanical Engineering and Telecommunications
(Universitat Politècnica de Catalunya (UPC), 2022)
Comunicació de congrés
Accés obertAtmospheric turbulence is one of the limiting phenomena in interesting applications and fields such of optical telecommunications and Observational Astronomy. Both Telecommunication and Aerospace Engineering students may ... -
Wind effects on fluctuations of the received power in FSO Communications due to atmospheric turbulence
(Universitat Politècnica de Catalunya, 2018-06)
Treball Final de Grau
Accés restringit per acord de confidencialitat