Method for reducing mutual interference between different low-earth-orbit communication satellite systems

By adopting priority control and frequency judgment functions in low-orbit communication satellite systems, the frequency interference problem between low-orbit communication satellite systems is solved, spectrum sharing with geostationary orbit satellites is realized, spectrum usage efficiency and system reliability are improved sex.

WO2025001497A1PCT designated stage expired Publication Date: 2025-01-02CHINA ACADEMY OF SPACE TECHNOLOGY
View PDF 9 Cites 2 Cited by

Patent Information

Application Number
PCT/CN2024/091106
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-06-30
Filing Date
2024-05-06
Publication Date
2025-01-02

AI Technical Summary

Technical Problem

It is difficult to effectively reduce mutual frequency interference between existing low-orbit communication satellite systems, especially under high dynamic and full real-time operating conditions, and cannot share spectrum with geostationary orbit satellites at the same time.

Method used

By setting up low-orbit communication satellite systems of cooperative and non-cooperative classes, adopting priority control strategies, selecting switching beams or frequency to reduce interference, using movable point beams and frequency judgment functions, calculating beam space isolation angles, and formulating communication protocols Real-time notification to ensure spectrum sharing between different low-orbit communication satellite systems.

Benefits of technology

Spectrum sharing between different low-orbit communication satellite systems is realized, and frequency interference with geostationary orbit satellites is effectively reduced, and spectrum usage efficiency and system reliability are improved.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN2024091106_02012025_PF_FP_ABST
    Figure CN2024091106_02012025_PF_FP_ABST
Patent Text Reader

Abstract

Disclosed in the present invention is a method for reducing mutual interference between different low-Earth-orbit communication satellite systems, which can enable different low-Earth-orbit communication satellite systems to share a radio frequency spectrum therebetween. Antenna sub-beams transmitted and received by a first low-Earth-orbit communication satellite system are steerable spot beams, and an on-satellite terminal and a ground terminal thereof have an uplink frequency interference determination function and a downlink frequency interference determination function. For a cooperative second low-Earth-orbit communication satellite system, ephemeris and beam information notification are mutually performed between the first low-Earth-orbit communication satellite system and the second low-Earth-orbit communication satellite system, and the first low-Earth-orbit communication system determines, by means of a beam isolation angle, whether beams of the two systems interfere with each other; and for a non-cooperative second low-Earth-orbit communication satellite system, the first low-Earth-orbit communication satellite system actively performs uplink interference detection and downlink interference detection, and if there is interference, an interfered-with beam is switched to another beam meeting spatial isolation requirements in an adjacent satellite, or the frequency of the interfered-with beam is switched to another frequency. The first and second low-Earth-orbit communication satellite systems complete interference avoidance with respect to a GSO satellite by means of turning off beams in an area which does not meet the lowest isolation angle with respect to the GSO satellite.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Frequency reuse method and apparatus between high-orbit and low-orbit satellites

    CN106470486A

  • Low-orbit constellation GEO frequency interference avoidance method based on multiple coverage

    CN110958047A

  • Interference avoidance system and method for spatial internet constellation

    CN112600613A

  • Method capable of reducing frequency interference and communication satellite system

    CN112968729A

  • Method for reducing mutual interference between different low-orbit communication satellite systems

    CN117014059A

Cited By

  • Frequency spectrum autonomous monitoring method and system for low-orbit giant constellation, and storage medium

    CN120049944A

  • VDES uplink service channel interference avoidance method and device

    CN120750410A