Search Results - "Douvenot, Rémi"

A Fast Wavelet-to-Wavelet Propagation Method for the Simulation of Long-Range Propagation in Low Troposphere by Zhou, Hang, Chabory, Alexandre, Douvenot, Remi

“…As an alternative method to the discrete split-step Fourier (DSSF) method, the split-step wavelet method has recently been derived. This method based on a…”
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Modeling the long-range wave propagation by a split-step wavelet method by Zhou, Hang, Douvenot, Rémi, Chabory, Alexandre

“…•A split-step wavelet method is introduced to model the long-range wave propagation.•The split-step wavelet technique is inspired by and faster than split-step…”
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A Local Split‐Step Wavelet Method for the Long Range Propagation Simulation in 2D by Bonnafont, Thomas, Douvenot, Rémi, Chabory, Alexandre

“…Modeling long‐range propagation of electromagnetic waves is necessary to study the performance of systems, for applications such as radar or navigation. Such…”
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A Variational Adjoint Approach on Wide-Angle Parabolic Equation for Refractivity Inversion by Karabas, Uygar, Diouane, Youssef, Douvenot, Remi

“…Radar systems performance under anomalous propagation conditions can be predicted if the atmosphere is properly known. This article introduces a tomographic…”
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A Deterministic VOR Error Modeling Method-Application to Wind Turbines by Claudepierre, Ludovic, Douvenot, Remi, Chabory, Alexandre, Morlaas, Christophe

“…VOR devices are sensitive to multipath. These perturbations yield an error on the azimuth information received by the aircraft. This article presents a…”
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Adaptive Metamodels for Crack Characterization in Eddy-Current Testing by Douvenot, Rémi, Lambert, Marc, Lesselier, Dominique

“…In the framework of nondestructive eddy-current testing, an inversion method is proposed. It relies on a metamodel-based optimization method: a fast…”
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Parameter-Based Rules for the Definition of Detectable Ducts for an RFC System by Douvenot, Remi, Fabbro, Vincent, Elis, Kevin

“…Refractivity from clutter (RFC) consists in inferring the lower atmospheric conditions from the clutter measured by a coastal or shipborne radar. A data…”
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A Phase Correction for Long Distance Propagation Using Split-Step Methods in Non-Rectangular Domains by Ligny, Lucas, El Ahdab, Zeina, Douvenot, Rémi

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A theoretical study of a radiofrequency wave propagation through a realistic turbulent marine atmospheric boundary layer based on large eddy simulation by Darchy, Victor, Douvenot, Rémi, Jamme, Stéphane, Galiègue, Hélène

“…This study aims at modeling and investigating the impact of realistic turbulence inhomogeneity on radiowave propagation by utilizing large eddy simulations…”
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A duct mapping method using least squares support vector machines by Douvenot, Rémi, Fabbro, Vincent, Gerstoft, Peter, Bourlier, Christophe, Saillard, Joseph

“…This paper introduces a “refractivity from clutter” (RFC) approach with an inversion method based on a pregenerated database. The RFC method exploits the…”
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A 3D Split-Step Fourier Algorithm Based on an Discrete Spectral Representation of the Propagation Equation by Zhou, Hang, Chabory, Alexandre, Douvenot, Rémi

“…A propagation method self-consistent in the discrete domain for the simulation of large distance scenarios in a 3D inhomogeneous atmosphere is proposed. First,…”
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Real time refractivity from clutter using a best fit approach improved with physical information by Douvenot, Rémi, Fabbro, Vincent, Gerstoft, Peter, Bourlier, Christophe, Saillard, Joseph

“…Refractivity from clutter (RFC) retrieves the radio frequency refractive conditions along a propagation path by inverting the measured radar sea clutter…”
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Particle optimization with metamodel for crack characterization by Douvenot, Rémi, Lambert, Marc, Lesselier, Dominique

“…A new inverse method for real time eddy current testing is introduced. It is based on particle swarm optimization coupled with a metamodel. This metamodel is…”
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Investigation on Vertical Resolution of Atmospheric Simulations for the Propagation in Realistic Turbulent Media by Victor, Darchy, Remi, Douvenot, Stephane, Jamme, Helene, Galiegue

“…In split-step methods, the contribution of tropospheric scintillation on the propagating electric field is taken into account by modifying the phase of the…”
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Stochastic Modeling of the Radiation Pattern of Airborne Antennas: Application to the Radar Altimeter by Djelloul, El Mehdi, Chabory, Alexandre, Morlaas, Christophe, Douvenot, Remi

“…Aircraft include several radio-frequency systems, providing services such as communication, navigation and surveillance. Frequency wise, these systems must…”
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Split-step wavelet with local operators for the 3D long-range propagation by BONNAFONT, Thomas, DOUVENOT, Remi, CHABORY, Alexandre

“…Modeling the long-range propagation in the low troposphere is a topic of major concern for many systems such as radar. In 3D, split-step Fourier methods are…”
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Discrete Turbulent Spectrum Modelling for 2D Split-Step Electromagnetic Propagation Schemes by Darchy, Victor, Douvenot, Remi, Galiegue, Helene, Jamme, Stephane

“…The multiple phase screen method is widely used for modelling the electromagnetic propagation in a turbulent medium. In this technique, the turbulent phase…”
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A Multiscale Parametrization for Refractivity Estimation in the Troposphere by Karabas, Uygar, Diouane, Youssef, Douvenot, Remi

“…This paper presents the idea of multiscale parametrization for tropospheric refractivity inversion using gradient-based optimization method. Our motivation is…”
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On the Use of Adjoint Methods for Refractivity Estimation in the Troposphere by Karabas, Uygar, Diouane, Youssef, Douvenot, Remi

“…This paper presents a preliminary study of a new inversion strategy combining the method of adjoint applied to the wide-angle parabolic equation and the method…”
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A speed up of split-step wavelet for the computation of long range propagation by Bonnafont, Thomas, Douvenot, Remi, Chabory, Alexandre

“…The atmospheric long-range propagation above the ground is of major importance for many ground systems as radars. The split-step wavelet method allows to…”
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