Troposcatter transmission loss subsectoin model

Abstract

Caused by atmospheric irregularities, tropospheric scatter is the principal mechanism for radio trans-horizon propagation which occurs permanently at frequencies higher/larger than 30 MHz. The study of Tropospheric scatter propagation characteristics is a hot issue. The transmission loss is a vital factor to describe those characteristics for designing the scatter link. Various predicting methods of transmission loss are proposed on similar application conditions. However, there is not a unified approach guiding us to obtain the propagation loss. In this article, we propose a semi-empirical troposcatter transmission loss subsection model to calculate the average annual troposcatter transmission loss accounting for the relationships between link parameters and transmission loss provided by public models for one hand. On the other hand, the model is also determined by trans-horizon propagation loss data banks released by International Telecommunication Union. The prediction results of this new troposcatter model are compared with other current troposcatter models using the measured data. The comparison results show that the new model has a better performance in stability.