Comparison of rain attenuation prediction models for terrestrial links and their impact on the performance of link transformation

As rainfall has a serious effect on wireless microwave transmission, performance of rain rate and rain attenuation prediction models are vital for planning of networks consisting of such links. As several different prediction models exist in the literature we give a comparison of the performance of the most applied ones. Moreover, we introduce the transformation of rain attenuation over different microwave links based on the investigated methods. We identify the most suitable rain attenuation prediction model and verify the proposed link transformation model with the ITU-P.530-15 model on long-term statistics. The purpose of this document is to investigate different rain attenuation prediction models for terrestrial links and to find a suitable prediction method to perform a transformation of rain attenuation on microwave links with different physical parameters.