Thesis (Ph.D) - University of Birmingham, School of Electronic and Electrical Engineering, Faculty of Engineering.
|Statement||by Christopher Andrew Zelley.|
Radiowave propagation over an irregular terrain using the. The finite difference implementation of the parabolic equation method provides a numerical solution to the problem of diffraction of radiowaves by irregular terrain in the presence of atmospheric refraction effects. The method has been validated by comparisons with theory and measured data.>Cited by: Research Article Parabolic Equation Modeling of Propagation over Terrain Using Digital Elevation Model Xiao-Wei Guan,1 Li-Xin Guo,1 Ya-Jiao Wang,1 and Qing-Liang Li2 1School of Physics and Optoelectronic Engineering, Xidian University, Xi’an , China 2China Research Institute of Radio Wave Propagation, Qingdao , China Correspondence should be addressed to Li-Xin Guo; Author: Xiao-Wei Guan, Li-Xin Guo, Ya-Jiao Wang, Qing-Liang Li. This book is the first to present the application of parabolic equation methods in electromagnetic wave propagation. These powerful numerical techniques have become the dominant tool for assessing clear-air and terrain effects on radiowave propagation and are growing increasingly popular for solving scattering problems. The book gives the mathematical background to parabolic equation modelling.
In this paper, a hybrid 2W-PE method is presented to model the low-frequency (LF) groundwave propagation over irregular terrain. The method Author: Mireille Levy. The two-dimensional (2-D) parabolic equation (PE) is widely used for making radiowave propagation predictions in the troposphere. The effects of transverse terrain gradients, propagation around the sides of obstacles, and scattering from large obstacles to the side of the great circle path are not modeled, leading to prediction errors in many situations. In this paper, these errors are. The Millington method, on the other hand, could not demonstrate the propagation characteristics over irregular terrain. As the topographic relief becoming larger, the integral equation method is. Firstly the staircase terrain and piecewise linear terrain model of PE method for electromagnetic wave propagation via troposphere over irregular terrains are addressed. Then the loss factors of electromagnetic wave propagation over a knife-edge and a wedge terrain are calculated using the UTD, Ray and PE algorithms.
Radio Wave Propagation and Parabolic Equation Modeling is a critical resource for electrical, electronics, communication, and computer engineers working on industrial and military applications that rely on the directed propagation of radio waves. It is also a useful reference for advanced engineering students and academic researchers. This book is the first to present the application of parabolic equation methods in electromagnetic wave propagation. These powerful numerical techniques have become the dominant tool for assessing clear-air and terrain effects on radiowave propagation and are growing increasingly popular for solving scattering problems. The book gives the mathematical background to parabolic equation modelling 5/5(2). A conventional method for modeling radio wave propagation in troposphere is the discrete mixed Fourier transform algorithm (DMFT) based on central difference formula, which will cause the numerical oscillations when calculating the problems over mixed dynamic impedance boundary. This paper describes the forward-backward difference DMFT, which solves the problem of blind spot in traditional. Formulation is given for efficient parabolic equation solution of radiowave propagation in inhomogeneous atmosphere and over irregular terrain. Both standard and wide angle parabolic equation derivations are presented. Impedance boundary conditions are used to characterize the ground. A tropospheric boundary.