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A Feasibility Study on the Extension of the Point Scatterer Formulation to Include Wind Induced Dynamics

Leonor, N. ; Caldeirinha, Rafael ; Sanchez , M. ; Fernandes, T. ; Rebelo, S. Morgadinho

A Feasibility Study on the Extension of the Point Scatterer Formulation to Include Wind Induced Dynamics, Proc Loughborough Antennas and Propagation Conf. – LAPC, Loughborough, United Kingdom, Vol. , pp. - , November, 2017.

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Abstract
This paper presents a feasibility study on the extension of the point scatterer formulation to include time-varying effects caused by wind induced channel dynamics. This modeling approach, which is based on a ray-tracing algorithm, employs various point scatterers with specific radiation characteristics, distributed within a computational volume, to characterize the electromagnetic behavior in the presence of trees and vegetation volumes. This propagation model has now been extended to include the time-varying received signal level, caused by the swaying motion of branches, twigs and leafs. To this extent, a statistical model is used to characterize the time-varying attenuation of each multipath component. The performance of the proposed model is assessed against measurements intended to record the dynamic re-radiation pattern of a tree in various windy conditions, which included four wind directions and two wind speeds.