Interference Mitigation Technology Solution for 5G Base Stations to Satellite Earth Stations

Widespread adoption of 5G systems may interfere with fixed satellite service (FSS) earth stations operating in nearby frequency bands. Some countries and regions are currently considering 5G services in the 3.5 GHz range. This study first examines the feasibility of coexistence of satellite FSS operating in nearby frequencies and 5G systems operating in the 3.5 GHz range. The coexistence analysis is performed for the reception of the downlink of a 5G base station in the 3.5 GHz band to a nearby FSS ground station with parameters taken from the ITU-R guidelines related to IMT and FSS systems. The possibility of interference between 5G systems and satellite fixed services, the criteria required for compatibility studies, and the interference deterministic analysis study techniques and results of the study are then presented. Based on a thorough study of interference mitigation strategies that can be used to implement inter-system coexistence, the results of the study outline the protection distances required for the coexistence of 5G systems and FSS ground stations at different spacing frequencies. Finally, the separation distances required for the coexistence of the two systems in adjacent frequencies and the options of interference mitigation techniques that can be considered are given.