Estimation of Path Loss Propagation Model on Homogeneous Vegetation for 2100 MHz Mobile Communication Networks

This study discusses the estimation of propagation model for urban areas in the University of Sumatera Utara which are surrounded by many trees. Measurement data obtained by the drive test method were taken from 3 routes, each route was covered by homogeneous vegetation. This study compares the calculation results of propagation models such as the Lee model, the COST 231 Hata model, the Walfich-Bertoni model, and the COST 231 Walfich-Ikegami model to obtain an estimation model that is suitable for the University of North Sumatra. To obtain the estimation model used quadratic parabolic regression method and the addition of the coefficient of Root Mean Square Error (RMSE). Based on the results of the quadratic parabolic regression method and the results of the RMSE values for each propagation model, a propagation model that is close to the research results is obtained, namely the Walfisch-Bertoni propagation model. By adding the RMSE coefficient to the Walfisch-Bertoni equation, an adjusted Walfisch-Bertoni model is obtained with a decreasing value of up to 25 dB for all routes. This shows that the appropriate propagation model for the University of Sumatera Utara is the Walfisch-Bertoni propagation model.