System capacity optimization method and device for satellite communication constellation

A system capacity, satellite communication technology, applied in the field of system capacity optimization of satellite communication constellations, can solve the problems of NGSO constellation unable to achieve system capacity, uneven resource allocation, complex modulation methods, etc.

Active Publication Date: 2019-09-24
TSINGHUA UNIV +1
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Problems solved by technology

In addition, due to the fact that many variables need to be considered in practical applications and the modulation method is relatively complex, resource allocation often occurs unevenly, so that the NGSO constellation cannot achieve the best system capacity

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  • System capacity optimization method and device for satellite communication constellation
  • System capacity optimization method and device for satellite communication constellation
  • System capacity optimization method and device for satellite communication constellation

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Embodiment Construction

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0042] With the increase of NGSO satellites, there are more and more satellites with the same frequency and close orbits, which makes the co-frequency interference between NGSO constellation and GSO satellite system more and more serious. According to ITU regulations, medium and low orbit satellites must take measures to avoid harmful interference to GSO satellites during communicati...

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Abstract

The invention provides a system capacity optimization method and device for a satellite communication constellation, and relates to the technical field of satellite communication. The satellite communication constellation comprises a plurality of non-geosynchronous orbit satellites, and the method comprises the steps of obtaining the constraint conditions of the system capacity performance in a satellite communication constellation, wherein the constraint conditions comprise the constraint conditions of the mapping relation between wave beams and earth stations, the constraint conditions of transmitting power and the constraint conditions of interference values, and the interference values are represented through the mapping relation and the transmitting power; calculating to obtain an optimal solution of the transmitting power and an optimal solution of the mapping relation according to the constraint condition; and communicating according to the optimal solution of the transmitting power and the optimal solution of the mapping relation, so that the maximum system capacity is achieved under the condition that the same-frequency geosynchronous orbit satellite communication system is not interfered.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a system capacity optimization method and device for a satellite communication constellation. Background technique [0002] According to the classification of satellite orbits, satellite communication systems include geosynchronous orbit (Geostationary Earth Orbit Satellite, GSO) satellite communication systems and non-synchronous orbit (NGSO) satellite communication systems. Compared with GSO satellites, NGSO satellite systems located in medium and low orbits have advantages such as short propagation delay and small link loss. Since the coverage of a single NGSO satellite is very limited, a constellation can be formed through orbit design to achieve global and full-time coverage. [0003] With the increase of NGSO satellites, there are more and more satellites with the same frequency and close orbits, which makes the co-frequency interference between NGSO conste...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185
CPCH04B7/18513H04B7/18519Y02D30/70
Inventor 靳瑾李婷林子翘
Owner TSINGHUA UNIV
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