Small satellite satellite-ground communication integrated system

Abstract

The invention relates to a satellite-earth communication integration system for a minisatellite, which is composed of a TT & C antenna network, a USB transponder, a remote control unit, a data processing unit, a data transmission ejector as well as a data transmission antenna. The system realizes the integration of the measurement and control and data transmission communication in the structure and the function, decreases the weight of the whole satellite, reduces the power consumption of the equipment and saves the manufacturing cost. The telemetering information and the load information share the same channel to download, which improves the utilization efficiency of the communications channel. Meanwhile, the remote control unit of the system is capable of demodulating to the uplink PSK signal, and also to the uplink acquisition data. The system has strong expansibility, which lays a basis for the application of the new data transmission technology in the satellite-earth communication integration system.

Description

technical field [0001] The invention relates to a satellite communication system, in particular to an integrated satellite-ground communication system for small satellites. Background technique [0002] With the development of information technology, the integrated and functional design of small satellite satellite-ground communication has become a necessary trend. The integrated design of satellite-ground communication has not started in China, and there are few reports abroad. The existing satellite-to-ground communication of small satellites still adopts the method of separate transmission of the measurement and control channel and the data transmission channel (payload data channel). Figure 1 and Figure 2 respectively show a typical satellite measurement and control subsystem and data transmission subsystem. Composition structure diagram. As shown in Figure 1, the measurement and control subsystem is composed of a transponder, a mixer, a broadband network and a measure...

AI Technical Summary

Problems solved by technology

The satellite data transmission subsystem and the measurement and control subsystem shown in Figure 1 and Figure 2 are independent in structure and function, and there are the following main problems: increase the weight of the whole star, occupy more volume; consume more energy of the whole star; The uplink remote control mode is only PSK mode, which occupies the communication channel but transmits a small amount of data, and the utilization efficiency of the communication channel is low; it is difficult to meet the higher requirements for satellite-to-ground communication in terms of reliability and security

Therefore, the existing method of separate system design for measurement and control and data transmission is not suitable for further application on small satellites

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