Effect of azimuth angle probability distribution on interference between mobile satellite gateway station and terrestrial radio-relay link

MSS-feeder links and terrestrial radio-relay links will share the same spectrum of bandwidth. This requires proper and strict regulations for coordinating these services. The azimuth angle probability distribution of the MSS-gateway station antenna plays a significant role in the interference scenario between the gateway station and terrestrial radio-relay link. This paper shows that the probability distribution of azimuth angle is not equally likely as was suggested in some previous studies, but has stronger likelihood in certain directions, usually in the vicinity of inclination angle. The carrier-to-interference ratio shows a strong dependence on this unequal distribution. The planning of the gateway station should take this effect into consideration whenever terrestrial radio-relay links are situated in the nearby area.