Method for designing frequency spectrum coexisting constellation between low-orbit constellation systems

Abstract

The invention discloses a method for designing a frequency spectrum coexisting constellation between low-orbit constellation systems. The method comprises the following steps: acquiring the orbital surface number of a first satellite constellation, the initial ascending node right ascension of a first orbital surface and a second orbital surface, the dispersion and ascending node right ascension drift rate of the ascending node right ascension, and the orbital height and orbit eccentricity of the second satellite constellation; determining the orbital plane number of the second satellite constellation according to the orbital plane number of the first satellite constellation; obtaining the initial ascending node right ascension of each orbit plane of the second satellite constellation according to the initial ascending node right ascension and ascending node right ascension dispersion of the first orbit plane and the second orbit plane of the first satellite constellation and the orbitplane number of the second satellite constellation; and obtaining the orbit inclination angle of the second satellite constellation according to the ascending node right ascension drift rate of the first satellite constellation, the orbit height of the second satellite constellation and the orbit eccentricity. According to the second satellite constellation obtained according to the technical scheme of the invention, coexistence with the frequency spectrum of the first satellite constellation is easily realized by adopting a spatial isolation method.

Description

technical field [0001] The invention relates to the technical field of satellite communication. More specifically, it relates to a constellation design method for spectrum coexistence among low-orbit constellation systems. Background technique [0002] In recent years, many countries are accelerating the declaration and development of low-orbit broadband communication constellation systems. The low-orbit broadband communication constellation usually adopts the Walker constellation. The Walker constellation is composed of multiple satellites with the same orbital semi-major axis and orbital inclination, and is divided into several orbital planes evenly distributed along the equator. The relative phases between satellites within an orbital plane maintain a specific relationship. [0003] The space isolation method is a relatively mature spectrum coexistence technology. The current low-orbit broadband communication constellation system plans to adopt this method to achieve sp...

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Problems solved by technology

[0005] However, low-orbit satellites move rapidly relative to the earth's surface, and the earth stations of the low-orbit constellation system must frequently switch satellites to achieve long-term continuous communication. The connection relationship between the earth station and the satellite of the low-orbit constellation system changes with time, and the connection process The earth station antenna pointing of the low-orbit constellation system also changes rapidly with the movement of the connected satellites. Therefore, for two low-orbit satellite constellation systems without a specific spatial relationship, when the space isolation strategy is used to realize the two low-orbit satellite constellation systems When the frequency is compatible, the space isolation strategy is bound to be more complicated

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