Modelling of short-term frequency scaling for rain attenuation using ITALSAT data

摘要

In this article we describe a statistical model for the assessment of the short-term frequency scaling ratio between rain attenuations at cm and mm wavelengths, taking into consideration the fluctuations arising from the type of rain (mainly the raindrop size distribution). The model has been derived from measured data, using the large attenuation database collected in Spino d'Adda, Italy, during the ITALSAT 8-years experiment at 18.7, 39.6 and 49.5 GHz, but can be applied to any pair of frequencies. By applying the model it is possible to generate, by means of a generator of random Gaussian numbers, samples of the up-link attenuation, for a given down link attenuation, to be employed in the simulation of up-link power control (ULPC) slant path channels.