Terminal simulator for low-orbit satellite constellation communication system and control method

Abstract

The invention relates to a terminal simulator for a low-orbit satellite constellation communication system and a control method, and a multiple access mode for communication between the terminal simulator and a satellite comprises one or a combination of more of time division multiple access, frequency division multiple access, code division multiple access and space division multiple access. The terminal simulator comprises a terminal uplink and receiving parameter simulation module, a local pps signal synchronization module, a spread spectrum transmitting module and a spread spectrum receiving module, and the terminal uplink and receiving parameter simulation module is used for outputting a multiple access control signal which corresponds to a set multiple access mode and is used for terminal uplink and receiving; the spread spectrum receiving module is used for receiving and demodulating a downlink signal sent by a satellite, and the spread spectrum transmitting module is used for receiving the multiple access control signal and outputting an uplink signal to the satellite. By combining a plurality of multiple access modes, the communication capacity and the test efficiency of the satellite constellation communication system can be improved from multiple angles of time, frequency, address and space.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a terminal simulator and a control method for a low-orbit satellite constellation communication system. Background technique [0002] According to different operating altitudes, satellites can generally be divided into three categories: high-orbit satellites, medium-orbit satellites and low-orbit satellites. Due to its close distance from the ground, the low-orbit satellite communication system has the advantages of small delay, small path loss, and low transmission power, and is widely used in various fields. The low-orbit satellite constellation can provide global coverage and rapidly improve the capabilities of satellite communication and satellite remote sensing; it has great potential in communication broadband and can improve service quality with lower signal propagation delay; apply the low-orbit constellation to current global navigation satellites The si...

AI Technical Summary

Problems solved by technology

It solves the problem that in the prior art, the code division multiple access method is used to realize communication with different user terminals, the number of accessible users is too small, and the test efficiency of the communication system is low

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