On the use of Tamir's model for site-specific path loss prediction of HF/VHF systems in forests

Abstract

One of the most referenced analytical methods to calculate the HF and VHF radio propagation loss in forests is Tamir's model. Though it is very straightforward for point-area radio coverage planning, its extension for site-specific predictions is actually an open problem. In the present work, a heuristic approach is proposed to this matter, when digital terrain and treetops heights models are available. Preliminary outcomes were computed by a Matlab code implementation of the adapted model. Coherent results were observed, with a “height gain” typical of site-specific methods clearly standing out.