A constellation design method for spectrum coexistence between LEO constellation systems

Abstract

The invention discloses a method for designing a spectrum coexistence constellation between low-orbit constellation systems, comprising the following steps: obtaining the number of orbital planes of the first satellite constellation, the initial ascending node right ascension and ascending node of the first orbital plane and the second orbital plane Right ascension spread and ascending node right ascension drift rate, as well as the orbital height and orbital eccentricity of the second satellite constellation; determine the orbital plane number of the second satellite constellation according to the orbital plane number of the first satellite constellation; The initial ascending node right ascension of one orbital plane and the second orbital plane, the distribution of ascending node right ascension, and the number of orbital planes of the second satellite constellation Obtain the initial ascending node right ascension of each orbital plane of the second satellite constellation; according to The orbital inclination of the second satellite constellation is obtained from the ascending node right ascension drift rate of the first satellite constellation, the orbital altitude and the orbital eccentricity of the second satellite constellation. The second satellite constellation obtained according to the technical solution of the present application can easily adopt a space isolation method to realize spectrum coexistence with the first satellite constellation.

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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