EVALUATION OF THE STATISTICAL CHARACTERISTICS OF THE SIGNAL FADING IN SATELLITE RADIOLINKS

The main objective of this paper is to find and ide ntify the fading fluctuations in telemetry signals caused by no homogeneities of the communication channel. The employed methodology follows the next steps: remove the envelope of the signal amplitude; identifying the Gaussian component; identifying the non-Gaussian component and obtaining the statistical characteris tics from Gaussian and non-Gaussian components. Then, the results are statistically tre ated in order to obtain a diffusion K parameter of Rician fading which are associated wit h fading in atmosphere and ionosphere layers. In this way the communications c hannel among satellite and ground station is characterized and a BER parameter can be obtained. The methodology is applied to telemetry signals of the Moscow State Un iversity microsatellite better known as "Universitetsky-Tatiana" and the results are dis cussed.