GEO and LEO cognitive satellite network and dynamic frequency distribution method therefor

Abstract

The invention discloses a GEO and LEO cognitive satellite network and a dynamic frequency distribution method therefor. Efficient spectrum sharing can be realized, and the performances of a primary user and a secondary user are both considered. The GEO and LEO cognitive satellite network comprises at least one GEO satellite serving as a primary user and at least one LEO satellite serving as a secondary user; the GEO satellite adopts a multi-beam antenna and seven-color frequency reuse; the LEO satellite adopts a multi-beam antenna and frequency reuse, and the frequency reuse factor is smallerthan seven; downlink links of the GEO satellite and the LEO satellite share the same frequency band, so as to provide broadband fixed services for users; the beam coverage area of the GEO satellite is10 times or more the beam coverage area of the LEO satellite; and the LEO beam located in the GEO beam uses any frequency other than frequency of the GEO beam to perform the space division frequencyreuse of the LEO multi beams, and the frequency reuse factor is smaller than the frequency reuse factor of the GEO.

Description

technical field [0001] The invention belongs to the technical field of satellite networks, in particular to a GEO and LEO cognitive satellite network and a dynamic frequency allocation method thereof. Background technique [0002] As the scope of human space exploration has greatly increased, more and more artificial satellites and aircraft have been deployed in space, and the resulting shortage of frequency resources has become increasingly prominent, and traditional, static, and single frequency allocation methods are difficult to meet Growing demand for services. The dynamic spectrum sharing technology provides an idea for the satellite system to find available spectrum resources, and it is also the guarantee for maintaining its efficient, reliable and stable operation. [0003] In 1999, Joseph Mitola, the "father of software radio", proposed the concept of cognitive radio for the first time. The most typical application of cognitive radio technology is spectrum sharing,...

AI Technical Summary

Problems solved by technology

However, as a commonly used technology for satellite system spectrum sharing, when using APC, in order to ensure the normal operation of the PU, the performance of the SU needs to be sacrificed, which will cause the decline of the spectrum efficiency of the SU

[0006] Therefore, the problem existing in the prior art is: when the frequency spectrum is shared in GEO and LEO satellite network, when guaranteeing the normal operation of primary user, the performance of secondary user is difficult to guarantee effectively

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