Application of S-UTD-CH Model into Multiple Diffraction Scenarios

Mehmet Baris Tabakcioglu,Ahmet Cansiz

doi:10.1155/2013/285304

Abstract

Propagation prediction models based on ray tracing in coverage estimation for digital broadcasting systems are compared. Geometrical Theory of Diffraction (GTD), Slope Uniform Theory of Diffraction (S-UTD), and Slope UTD with Convex Hull (S-UTD-CH) models are compared for computation time and propagation path loss. S-UTD-CH model is optimum model with respect to computation time and relative path loss.

Highlights

It is vital to calculate relative path loss of electromagnetic wave reaching to the receiver in multiple diffraction scenarios for more reliable radio broadcasting
A lot of electromagnetic wave propagation models based on ray tracing technique have been developed for a long time
Radio propagation models run for calculating electromagnetic wave strength in radio planning tools predicting coverage and field strength on the receiver

Summary

Introduction

It is vital to calculate relative path loss of electromagnetic wave reaching to the receiver in multiple diffraction scenarios for more reliable radio broadcasting. Radio propagation models run for calculating electromagnetic wave strength in radio planning tools predicting coverage and field strength on the receiver. In that case GTD model fails to calculate the electric field strength at the receiver accurately This model can be used in rural areas not having multiple diffractions with less computation time. To remove the continuity problem on the transition region, Slope Uniform Theory of Diffraction (S-UTD) model is proposed. This model based on adding of derivative of incoming fields [2, 3]. Effects of transmitter height to relative path loss are discussed

GTD Based Models

Comparison of GTD Based Models

Results and Discussions