Generation of an empiric propagation model for forest environment at GSM900/GSM1800/CDMA2100

This paper presents how to obtain an empiric propagation model in forest area by using both reference open area and field measurements. Empiric models for GSM 900, GSM 1800 and CDMA 2100 have been plotted through the number of tree passed in the forested area. While results conclude that path loss both in theory and measurements are increasing with respect to frequency, an obtained empiric formula for CDMA2100 is better good track in measurements than the others.