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.
关键词
LEO卫星系统/干扰规避/信令波束/业务波束/相控阵天线
Key words
LEO satellite system/interference avoidance/signaling beam/service beam/phased-array antenna
维普
万方数据