Satellite communication system and communication method optimized by adaptive code modulation mode

A satellite communication system and adaptive coding technology, applied in the field of satellite communication, can solve the problems of wasting channel resources, limitations, high communication bandwidth, etc., and achieve the effect of improving system performance

Active Publication Date: 2019-03-26
TSINGHUA UNIV
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Problems solved by technology

[0002] Satellite communication can cover a large area and provide network access for areas lacking ground network infrastructure, but the complex and changeable channel conditions also limit higher communication bandwidth
The channel quality between the satellite and the ground station is affected by various noise and attenuation factors, and the long-delay characteristics of the sate

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  • Satellite communication system and communication method optimized by adaptive code modulation mode
  • Satellite communication system and communication method optimized by adaptive code modulation mode
  • Satellite communication system and communication method optimized by adaptive code modulation mode

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[0024] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0025] figure 1 It shows a schematic structural diagram of a satellite communication system optimized for adaptive coding and modulation according to an embodiment of the present invention.

[0026] Such as figure 1 As shown, the adaptive coding and modulation optimized satellite communication system provided by the embodiment of the pr...

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Abstract

Embodiments of the invention provide a satellite communication system and communication method optimized by an adaptive code modulation mode. The system comprises a ground receiving terminal, a gateway station, and a satellite. The ground receiving terminal is used for: collecting and measuring channel state information; predicting a signal to noise ratio of a next round of transmission through amachine learning algorithm according to the channel state information; selecting an optimal code modulation mode according to the signal to noise ratio; and sending the number of the optimal code modulation mode to the gateway station. The gateway station is used for receiving the number of the optimal code modulation mode sent by the ground receiving terminal, and sending the number of the optimal code modulation mode to the satellite. The satellite is used for receiving the number of the optimal code modulation sent by the gateway station, and sending signals to the ground receiving terminalaccording to the optimal code modulation mode. According to the satellite communication system and communication method optimized by an adaptive code modulation mode, the channel resources can be used to the greatest extent, and the system performance can be improved by adaptively optimizing the code modulation mode.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of satellite communication, and in particular to a satellite communication system and communication method for adaptive coding and modulation optimization. Background technique [0002] Satellite communication can cover a large area and provide network access for areas lacking ground network infrastructure, but the complex and changeable channel conditions also limit higher communication bandwidth. The channel quality between the satellite and the ground station is affected by various noise and attenuation factors, and the long-delay characteristics of the satellite link and the channel state information often fluctuate greatly, resulting in large fluctuations in the signal-to-noise ratio. In order to ensure reliable communication However, the traditional fixed coding and modulation method uses the channel signal-to-noise ratio in the worst case as the basis for the selection of the...

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Application Information

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IPC IPC(8): H04B7/185H04B17/309H04B17/373H04B17/391H04L1/00
CPCH04B7/18513H04B7/18517H04B17/309H04B17/373H04B17/3913H04L1/0006H04L1/0015
Inventor 李贺武王鑫穆吴茜
Owner TSINGHUA UNIV
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