Prediction of multipath fading on terrestrial microwave links at frequencies of 11 GHz and greater
Abstract
Published data on the probability of multipath fading on different paths with lengths of to 45 km, at frequencies up to 37 GHz, measured in different countries, were analyzed. For the paths which have probabilities greater than 0.001% for 20 dB fades, it is found that the fading probability increases with antenna beam width. In addition, it is found that increasing the clearance of the path above surrounding terrain reduces the fading probability. Inclusion of these two variables, in addition to frequency and path length, reduces the uncertainty in prediction of fading probability by a factor of 80.
 Publication:

In AGARD Characteristics of the Lower Atmosphere Influencing Radio Wave Propagation 9 p (SEE N8424943 1532
 Pub Date:
 February 1984
 Bibcode:
 1984clai.agar.....C
 Keywords:

 Atmospheric Attenuation;
 Microwave Transmission;
 Multipath Transmission;
 Prediction Analysis Techniques;
 Signal Fading;
 Clearances;
 Fresnel Region;
 Probability Theory;
 Communications and Radar