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

A technology of synchronous satellites and geostationary orbit satellites, which is applied in the field of satellite communications, can solve the problems of non-synchronous satellite interference, signal interference, and failure to work normally, and achieve the effect of improving usability and communication capacity, and achieving co-frequency coexistence

Active Publication Date: 2018-07-13
TSINGHUA UNIV
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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

Method used

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  • Ground station system and method for avoiding collinear interference with geostationary satellites

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Embodiment

[0033] Figure 1-Figure 3 A schematic diagram of the relative positions of the ground station, non-synchronous orbit satellite constellation and synchronous orbit satellite provided by the implementation example of the present invention is given, wherein the solid line with arrows represents the real-time communication link, and the dotted line represents the connection line from the ground station to the synchronous orbit satellite. The solid arrows indicate the orbits of non-geostationary orbit satellites. The details are as follows:

[0034] Implementation of the invention The system is a ground station located at a certain location on the ground. The ground station can track a certain satellite in the non-geostationary orbit satellite constellation by controlling the antenna beam, such as figure 1 Satellite a in the satellite, and establish a communication link with it, implement satellite communication. The antenna beam pointing to the non-synchronous orbit satellite c...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185
CPCH04B7/18519H04B7/18517H04B7/195
Inventor 靳瑾晏坚匡麟玲向蕾陆建华
Owner TSINGHUA UNIV
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