Medium-low earth orbit satellite constellation and beam design method thereof

A technology of low-orbit satellites and design methods, applied in radio transmission systems, electrical components, transmission systems, etc., can solve problems such as large dynamic range of service allocation, uneven distribution of services over time and region, and complex changes in relative position relationships. , to achieve the effect of reducing the power consumption of the whole star, reducing the complexity, and compensating for inconsistent landing levels

Active Publication Date: 2020-02-25
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

[0006] The problem solved by the technology of the present invention is: to overcome the deficiencies of the prior art, and to provide a beam design method for low-orbit satellites, which is aimed at complex changes in the relative positional relationship between satellites, a large dynamic range of service allocation between beams and within a beam, and a large range of service allocation. The problem of extremely uneven distribution over time and region can effectively improve the ability of beam C / I and dynamic power allocation

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  • Medium-low earth orbit satellite constellation and beam design method thereof
  • Medium-low earth orbit satellite constellation and beam design method thereof
  • Medium-low earth orbit satellite constellation and beam design method thereof

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Embodiment Construction

[0041] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0042]The invention provides a beam design method for improving the C / I and power dynamic allocation capability of the medium and low orbit satellites. For the transmission beam, in order to improve the efficiency of the power amplifier of the radio frequency channel, the phase-only weighting of the beam is adopted. For the intra-satellite beam, in order to improve the C / I as much as possible, there should be a certain spatial isolation between the beams of the same frequency, and the corresponding pattern suppression should be provided between the beams of the same frequency. Due to the large variation of the link distance in the coverage area of ​​low-orbit satellites, after adopting the earth-matched beam design, the influence of the side lobes of the edge beams on the sub-satellite beam increases. Beam effect. In order to improve the C / I of the u...

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Abstract

The invention relates to a medium-low earth orbit satellite constellation and a beam design method thereof. By adoption of earth matching wave beams, satellite signal landing level inconsistency caused by path difference is compensated. Wave beam arrangement optimization is carried out in two dimensions of a constellation and a single satellite, and high C / I full coverage of wave beams is realized. Meanwhile, for the problem of non-uniform distribution of the low-orbit satellite service, the power adjustment capability of the beams is improved by adopting the phase-only weighted optimization of the transmitted beam. The invention can be applied to beam optimization design of medium and low orbit multi-beam satellites and constellations, and has very strong practicability and market competitiveness.

Description

technical field [0001] The invention belongs to the technical field of medium and low orbit satellite constellation communication antennas, and relates to an optimization method for improving beam performance and power allocation capability in constellations. Background technique [0002] LEO satellites have the advantages of low orbit height, low transmission delay, miniaturization of user terminals, and seamless global coverage. Foreign low-orbit satellite systems have been developed for many years. The first-generation low-orbit systems represented by the Iridium system and the Global Star system have been in orbit and successfully operated, and are constantly being upgraded and improved; The second-generation low-orbit system represented by China is also gaining momentum, and test satellites have been launched one after another. [0003] At present, my country is also working hard to develop its own low-orbit satellite constellation, including Hongyan constellation and ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185
CPCH04B7/1851H04B7/18519
Inventor 李彪崔蕾吴欢薛江波李荣军龙毛张晓阳张启涛
Owner XIAN INSTITUE OF SPACE RADIO TECH
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