Frequency avoidance method and device for low-earth-orbit satellite

Abstract

The invention discloses a frequency avoidance method and device for a low-orbit satellite. One embodiment of the method comprises the following steps: controlling the switching state of each beam in aplurality of beams of a low-orbit satellite through a switching matrix of the low-orbit satellite so as to adjust the first beam coverage range of the low-orbit satellite and enable the beams of thelow-orbit satellite to avoid the interference on the beams of a high-orbit satellite; and controlling the on-off state of each beam in the plurality of beams of the other low-orbit satellites throughthe on-off matrixes of the other low-orbit satellites in the same constellation so as to adjust the second beam coverage range of the other low-orbit satellites and enable the second beam coverage range and the first beam coverage range to be matched to meet the beam coverage requirement. According to the embodiment, a satellite communication system does not depend on a satellite attitude controlsystem; and the frequency avoidance method for beam control based on the switch matrix enables the beam to be used more flexibly, and reduces the difficulty of a task planning algorithm.

Description

Technical field [0001] The invention relates to the field of satellite communications. More specifically, it relates to a low-orbit satellite frequency avoidance method and device. Background technique [0002] In order to provide users with larger capacity and higher rate communication services, the communication frequency of satellite communication has to choose a higher frequency band to meet the communication requirements of larger bandwidth and faster rate. In order to make full use of frequency orbit resources and provide a communication experience closer to the ground network, LEO (Low Earth Orbit) satellite communication is a good choice. However, due to the orbital position relationship between high-orbit satellite communication systems (including GSO satellite systems, Geostationary Earth Orbit Satellite, geostationary satellite systems and NGSO satellite systems, Non-Geostationary Satellite Orbit, non-geostationary satellite systems) and LEO communication constellatio...

AI Technical Summary

Problems solved by technology

[0004] Although the purpose of avoiding the frequency of high-orbit satellites can be achieved by changing the communication coverage and beam pointing by adjusting the satellite attitude, it will bring two problems in use

First, the satellite needs the cooperation of the GNC (GuideNavigation and Control, GNC for short) subsystem when doing frequency avoidance, so that the satellite GNC subsystem can be coupled with the communication system; All the beams that are fixedly connected to the main body will move together, and the use of beams lacks flexibility

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