Propagation Path Loss Models in Forest Scenario at 605 MHz

TL;DR

This paper evaluates existing propagation models in forest environments at 605 MHz, introduces a new model tailored for various forests, and demonstrates its improved accuracy through measurements and simulations.

Contribution

It proposes a novel short-range propagation model for forests that outperforms traditional models in fitting measured data at 605 MHz.

Findings

Proposed model has lower fitting errors than traditional models.

Measurements conducted in different forest types validate the model.

Model maintains reasonable computational complexity.

Abstract

When signals propagate through forest areas, they will be affected by environmental factors such as vegetation. Different types of environments have different influences on signal attenuation. This paper analyzes the existing classical propagation path loss models and the model with excess loss caused by forest areas and then proposes a new short-range wireless channel propagation model, which can be applied to different types of forest environments. We conducted continuous-wave measurements at a center frequency of 605 MHz on predetermined routes in distinct types of forest areas and recorded the reference signal received power. Then, we use various path loss models to fit the measured data based on different vegetation types and distributions. Simulation results show that the proposed model has substantially smaller fitting errors with reasonable computational complexity, as compared with representative traditional counterparts.