Estudo analítico e numérico de um enlace digital de comunicação via satélite em condição orbital geoestacionária

Abstract

Satellite links are affected by the propagation conditions offered by the And distortions generated by the orbital repeater itself. The attenuations and Losses due to the environment and the passive components are well discussed and Well defined. However, the systems in some cases are over dimensioned To attend to the possible degenerations that are not considered in the calculations. This one This work presents an analysis of all satellite links, discussing in a more Intermodulation products and the degenerations caused by Transponders that affect the carrier / noise ratio. With equations obtained through Of finite induction, it is possible to obtain the values ​​of the carrier-to-noise ratio of Intermodulation according to the amplitude of the carriers, the number of carriers That travel simultaneously through the orbital repeater, and the transfer function of the Transponder.