Discrete Turbulent Spectrum Modelling for 2D Split-Step Electromagnetic Propagation Schemes

Victor Darchy (1, 2) , Rémi Douvenot (3) , Hélène Galiègue (1) , Stéphane Jamme (4)

1 EMA - ENAC Equipe TELECOM-EMA
2 ENAC - Ecole Nationale de l'Aviation Civile
3 TELECOM - ENAC - Equipe télécommunications
4 DAEP - Département Aérodynamique Energétique et Propulsion

The multiple phase screen method is widely used for modelling the electromagnetic propagation in a turbulent medium. In this technique, the turbulent phase screens are classically generated from a continuous Von-Karman Kolmogorov scintillation spectrum. Recent works led to the development of an auto-coherent split-step wavelet propagation method based on a discrete formulation of the parabolic wave equation. In this configuration, the use of continuous spectra is no more suitable. In this paper, we propose an auto-coherent generation method of the turbulent phase screens. To do so, a discrete formulation of the classical Von-Karman Kolmogorov spectrum is introduced. The impact of the modelled turbulence is finally discussed through the computation of the log-amplitude variance to validate this approach.

Mots clés: split-step auto-coherent propagation turbulence wavelets; split-step; auto-coherent; propagation; turbulence; wavelets

Domaines: Physique [physics]

Victor Darchy, Rémi Douvenot, Hélène Galiègue, Stéphane Jamme. Discrete Turbulent Spectrum Modelling for 2D Split-Step Electromagnetic Propagation Schemes. European Conference on Antennas and Propagation, Mar 2023, Florence, Italy. ⟨hal-03967860⟩