Cognitive Uplink FSS and FS Links Coexistence in Ka-band: Propagation based Interference Analysis

Cognitive Radio (CR) is a promising technology for the flexible spectrum utilization in wireless communications. Very recently, there has been increasing interest in the applicability of CR techniques in satellite communication systems. This paper investigates the impact of the propagation phenomena in a co-existence scenario of satellite uplink Fixed Satellite Service (FSS) and terrestrial Fixed Service (FS) systems operating in Ka-band. Specifically, we analytically derive the Signal-to-Interference Ratio (SIR) and the Signal-to-Noise plus Interference Ratio (SNIR) statistical distributions considering an accurate space-time dependent propagation channel model, which is appropriate for these frequencies and is also used for validation. Numerical results highlight the impact of the propagation phenomena and some useful conclusions for the cognitive satellite system design are drawn.