Holographic Prediction of Ray Parameters in Line-of-Sight Links Due to Tropospheric Multipath

Ducting in LOS radio links is investigated. A technique is proposed to estimate the number of refracted rays that could reach the receiver due to the presence of a duct, their angle of arrival and their relative amplitude in comparison to the direct ray

Holographic Prediction of Ground Multipath Parameters From Range Gain Patterns

A new technique is presented where the range gain pattern produced by ground multipath interference is considered as a hologram. The technique can be applied to both flat and spherical earth models. Field distribution at the transmitting antenna side is obtained by digital reconstruction from the range gain pattern. Transmitting antenna height and ground reflection coefficient can therefore be predicted. The technique is validated by calculated and measured range gain patterns, and the predicted values are in good agreement with actual ones