Collinear Interference Estimation Method for High and Low Orbit Co-Frequency Coexistence Satellite Communication Systems

Abstract

The invention discloses a method for estimating collinear interference of a high-low orbit satellite communication system with co-frequency coexistence, comprising the following steps: according to the ephemeris data of the high-low orbit satellite communication system and the latitude and longitude of a ground station, an interference analysis scene between the two is constructed; According to the ephemeris data, screen out the collinear interference links between the high and low orbit satellite communication systems; distinguish the types of interference links according to the screened out collinear interference links; configure the ground station, the communication terminal parameters of each satellite, and the satellite ephemeris And the location parameters of the earth station; respectively estimate the carrier power, noise power and carrier power from the interference source received by the receiving end. This method aims at the specific calculation methods of corresponding parameters such as signal source carrier power, noise power and interference source carrier power under different interference link types, which improves the accuracy and pertinence of collinear interference estimation, and can be applied to S, Ku, Ka and other frequency band satellite communication system design and declaration coordination of space frequency resources.

Description

technical field [0001] The invention belongs to the field of satellite communication, and in particular relates to a method for estimating collinear (In-Line) interference of a high-orbit and low-orbit co-frequency coexistence satellite communication system. Background technique [0002] With the continuous development of satellite communication technology, the LEO low-orbit broadband satellite communication constellation has become a research hotspot in various countries and institutions around the world. Due to limited space frequency resources, it is inevitable that multiple systems work at the same frequency between LEO constellations and high-throughput GEO satellites. For high and low orbit co-existence satellite communication systems, in the process of spectrum sharing, when some satellites or terminals are close to each other, communication links will overlap, and collinear (In-Line) interference will occur at this time , which has a great impact on normal satellite...

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Problems solved by technology

[0003] At present, the research on co-channel interference estimation mainly focuses on the co-channel interference caused by multi-user access in a single satellite communication system.

In the Chinese patent with the publication number CN110572192, a method and device for frequency avoidance of low-orbit satellites are proposed, and a collinear interference avoidance strategy for LEO and GEO satellites is proposed, but there is no research on the In-Line conditions of LEO and GEO systems Interference analysis method

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