Depicted in this research is a user-friendly MATLAB program that can be used to calculate co-channel interferences, both in the downlink and the uplink of a single satellite/space-based mobile communications system that utilizes frequency reuse in spot or cellular beams. The analysis and computer code can be applied to any type of satellite or platform elevated at any height above earth. The calculation is for a given instant of time for which the system parameters are input into the program. The results obtained are for the overall carrier to interference ratio (CIR) along with CIR for...