Method for forecasting of interference immunity of low frequency satellite communication systems

Abstract

This article describes analysis of interference immunity of low frequency satellite communication systems under conditions of ionosphere disturbances accompanied by formation of small-scale irregularities of electron concentration The model of electron concentration distribution in disturbed ionosphere and the model of transionospheric communication channel have been developed allowing to determine probability of erroneous signal reception as a function of root-mean-square deviation of small-scale fluctuations of total electron content. In order to determine them by GPS sounding, dual frequency receiver GPStation-6 of satellite navigation systems has been modified expanding significantly its capabilities. It is exemplified by modification of interference immunity of Gonets-DIM satellite communication system upon increasing fluctuations of total electron content during formation of regions with small-scale irregularities of electron concentration in ionosphere. The obtained results allow to develop practical recommendations for improvement of interference immunity of satellite communication systems under ionosphere disturbances on the basis of GPS sounding