Multipath Propagation Modeling and Measurement in a Clear-Air Environment for LOS Link Design Application

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Executive Summary

The impairment to radio signal propagation in clear-air environment requires accurate prediction method and modeling for terrestrial line of sight links. This is necessary because of the unstable nature of the environment the signal is traversing. Prediction methods based on global radioclimatic models of the ITU-R can currently be made for three significant clear-air propagation effects on terrestrial line of sight links: multipath fading, distortion and depolarization. In addition, such predictions can also be made for multipath fading on very low angle satellite links, and interference between terrestrial and satellite communication systems resulting from duct propagation beyond the horizon.

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