Research on Interference Avoidance Technology of LEO Satellite Communication System to GSO System
In recent years,the prosperity and development of Low Earth Orbit(LEO)satellite constellation makes it common for LEO satellite system and Geosynchronous Orbit(GSO)satellite system to share the same frequency.LEO satellite system within the same frequency band needs to avoid uplink and downlink interference to GSO satellite system.The methods and strategies to avoid the interference LEO satellite system to GSO satellite interference include adjusting direction,changing frequency,reducing power,and closing beams.On the basis of simulating the interference avoidance mode and interference zone of the system,combined with the characteristics of LEO satellite system,a scheme is proposed to switch the gateway station or turn off the beam when the feed link and the ground gateway pass through the avoidance zone.The user link combines the characteristics of phased array antennas,and the signaling beam achieves interference avoidance by injecting the space borne phased array antenna wave position table.The traffic beam achieves interference avoidance by encoding the ground grid corresponding to the interference avoidance area through injection.Different implementation plans and implementation processes for link interference avoidance are proposed.The research results provide strong technical support for the design and construction of LEO satellite constellation system.
LEO satellite systeminterference avoidancesignaling beamservice beamphased-array antenna
万方数据
维普
