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

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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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 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 The traditional fixed coding and modulation method uses the worst-case channel signal-to-noise ratio as the basis for the selection of the coding and modulation scheme, which will greatly waste channel resources

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