Satellite communication on the non-geostationary system and the geostationary system in the Fixed-satellite service

This paper focused on satellite communication on compatibility study between non-geostationary system and the geostationary system in the fixed-satellite service. Nowadays, both geostationary and non-geostationary fixed-satellite service satellite systems may operate in the frequency bands 37.5-39.5 GHz (space-to-Earth), 39.5-42.5 GHz (space-to-Earth), 47.2-50.2 GHz (Earth-to-space) and 50.4-51.4 GHz (Earth-to-space). However, there is currently no protection standard shared by the two systems in the Q/V frequency bands. This study uses the representative Low Earth orbit satellite to calculate the interference of two systems. In order to evaluate the level of interference, this paper specially selects the medium-sized satellite constellation with 336 satellites to calculate the aggregate interference level. Study used two tracking communication strategies, the maximum antenna Gain identification and the best elevation angle, to choose related satellite for considering different levels of interference. Paper calculated and analysed the compatible application of geostationary and non-geostationary fixed-satellite service system, and obtained preliminary compatibility and sharing conditions.