Ground station system and method for avoiding collinear interference with geostationary satellite

Abstract

The invention belongs to the field of satellite communication technologies and particularly relates to a ground station system and a method for avoiding collinear interference with a geostationary satellite. The system comprises a ground station located at one position of the earth and a non-geostationary satellite constellation connected to the ground station, wherein the ground station traces one satellite in the non-geostationary satellite constellation through controlling antenna beam and establishes a communication link with the satellite; when a connecting line between the ground station and one non-geostationary satellite points at the geostationary satellite, the ground station adjusts the beam direction and selects another non-geostationary satellite in the different direction in view to communicate, so that the collinear interference with the geostationary satellite is avoided. According to the ground station system and the method, the restriction that shutdown of the non-geostationary satellite is needed or the transmitting power of the non-geostationary satellite is greatly reduced when the collinear interference occurs is avoided, and the satellite communication of the ground station keeps continuous, so that the availability and the message capacity of the non-geostationary satellite constellation are improved and the same frequency coexistence of the non-geostationary satellite and the geostationary satellite is realized.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and in particular relates to a ground station system and method for avoiding collinear interference with synchronous satellites by switching satellites. Background technique [0002] Satellite mobile communication system consists of space segment, ground segment and user end. The space segment refers to the satellites in orbit and their communication coverage on the ground, the ground segment refers to all ground stations such as gateway stations, network control centers, and satellite measurement and control centers, and the user end is the satellite mobile terminal. The coverage that satellite mobile communication systems can achieve is much larger than that of ground mobile communication systems. It is suitable for areas with sparse traffic or areas with imperfect ground communication systems. The communication quality is stable and reliable, but the delay in signal transmissio...

AI Technical Summary

Problems solved by technology

According to ITU rules, NGEO must unconditionally avoid geostationary satellites, so one of the problems that low-orbit satellites need to solve is not to interfere with geostationary satellites

[0005] If the low-orbit satellite and the geostationary satellite use the same frequency spectrum, and the two are in a collinear position with the ground station, there will be signal interference and cannot work normally

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