A New Method to Minimize the Multipath Effects of Digital Microwave Lossystems, Based on Wideband Measurements at 5 and 15 GHz

Abstract

Measurements have been carried out on a 60 km path in the 5 and 15 GHz range. The analysis of the records revealed two important results: First, the statistical consideration of the long term experiments yields to a prediction about the availability of digital radio links as a function of the occupied bandwidth provided that no additional diversity measures are used. Second, the analysis of the determined coherence bandwidth allows a physical interpretation of the interference phenomena. The model of a dominating 3-path propagation found by these experiments could be proved with the aid of a high-directive tracked antenna system in the 15 GHz frequency range.