Carrier-to-interference (C/I) statistics on a dual polarized double diversity satellite system interfered by an adjacent terrestrial microwave system

Summary form only given. For frequencies above 10 GHz which are of high importance in current satellite systems, the dominant sources of interference are the following: interference due to differential rain attenuation induced by an adjacent satellite operating in the same frequency and crosstalk between orthogonally polarized signals. One of the most effective techniques to overcome potential fade margins and to decrease the outage time is site diversity. The reliable design of a modem satellite communication system must further take into account the interference effects. A method for the prediction of the carrier-to-interference statistics (C/I) on a dual polarized double diversity system interfered by an adjacent satellite path is properly modified for an adjacent terrestrial microwave system operating at the same frequency. The lognormal form for both the unconditional (including non-raining time) point rainfall rate R and attenuation A distribution is adopted and finally the convective raincell model is employed for the description of the horizontal variation of the rainfall medium. Numerical results taken from the present procedure are compared with existing predictive results for various geographic latitudes and climatic zones. The sensitivity of various parameters affecting the interference performance is also investigated. Some very useful conclusions are deduced towards the reliable and economic design of the future communication systems where orbital and frequency congestion is quite expectable