Wave propagation models Comparison of prediction results with measurements

Models that estimate diffraction effects on the propagation of radio waves over irregular terrain in the VHF and UHF bands available for digital TV applications will be used to predict field strengths that will be compared with those from the corresponding measurements. A basis for comparison between predictions and experimental data was obtained from a special measurement series performed by BFH-TI (Berne University of Applied Sciences, Engineering and Information Technology, Bienne, Switzerland) [1] to determine the height function of the received field strength. Thousands of path profiles and measurements are incorporated also into the ITU-R DBSG5 database. All these data (BFH-TI and DBSG5) will be described; the mean value and the standard deviation of the difference between measurements and predictions will be presented as functions of their number of main obstacles.