Heuristic UTD coefficients for radiowave coverage prediction in a urban scenario

Abstract

This paper presents a comparison of three heuristic coefficients for the Uniform Theory of Diffraction (UTD), used to characterize the radiowave scattering in typical urban scenarios. The coefficients were implemented in a propagation model based on ray-tracing techniques based in image theory. In order to evaluate each coefficient we analyze the statistical behavior of the mean and standard deviation of the absolute errors between the estimated values and the measured data of path loss in a large number of receptor points provided in the literature. Finally, we show the path loss prediction for each UTD coefficients proposed.

Analysis of Heuristic Uniform Theory of Diffraction Coefficients for Electromagnetic Scattering Prediction

“…We implemented the three different coefficients in three different realistic urban scenarios, which will be described next. [8]. The urban scenario is a typical downtown area of 0.6 km × 0.9 km with complex building architecture.…”

“…The receiver system consisted of a TeamCast professional receiver with a vertical quarter-wavelength monopole, a GPS, and software to collect and store the data. This system was in a test car with a receiver antenna on the top of the vehicle; data were collected at 1380 points in the drive test [8]. International Journal of Antennas and Propagation Figure 14 shows a 3D digital terrain model (DTM) of Valencia.…”

“…Previous work has shown that the Luebbers, Schettino, and Guevara coefficients can be used to accurately estimate the path loss in real outdoor environments [8][9][10][11], but such works were oriented to the evaluation of the implemented tools in real scenarios against measurements. Thus, the objective of this work is to evaluate the reciprocity and accuracy of these three heuristic UTD coefficients suited to characterize the electromagnetic scattering in realistic urban scenarios and compare with canonical examples.…”