Real-time wireless channel simulator and its simulation method for deep space communication

Abstract

Disclosed are a wireless channel realtime simulator and a simulation method oriented to deep space communication. The wireless channel realtime simulator and the simulation method are supportive of realtime duplex communication channel simulation of an uplink and a downlink. The wireless channel realtime simulator comprises a main control unit, a baseband signal channel simulation unit, a frequency changer unit and an attenuator unit, the main control unit is in data and order transmission with the baseband signal channel simulation unit, the frequency changer unit and the attenuator unit through a CPCI bus, and the baseband channel simulation unit, the frequency changer unit and the attenuator unit are in analog signal transmission through an SMA interface. By combining the wireless channel realtime simulator with the simulator method, transmission conditions of wireless signals under a deep space background can be effectively simulated in real time, and debugging, testing and performance evaluating of deep space communication equipment are realized in a ground laboratory.

Description

technical field [0001] The invention belongs to the technical field of deep space communication, and in particular relates to a wireless channel real-time simulator and a simulation method thereof for deep space communication. Background technique [0002] At present, the aerospace industry at home and abroad is booming, and a large number of spacecraft have been sent to carry out scientific research on extraterrestrial space and extraterrestrial celestial bodies. In these aerospace projects, ensuring reliable communication between spacecraft and ground stations, and between spacecraft and spacecraft is the key to the success or failure of space missions. The deep space communication environment is completely different from the ground communication environment and is relatively complex. Therefore, research on wireless channels in the deep space background in aerospace engineering, especially the development and testing of deep space communication systems for deep space chann...

AI Technical Summary

Problems solved by technology

[0005] In addition, the deep space channel is different from the wireless mobile channel on the ground. The transmission distance of the deep space signal is extremely long, which will inevitably lead to a huge path loss; Le frequency shift; deep space links are interfered by non-uniform charged particles ejected by solar activities, which will cause multipath effects, resulting in flickering of signal amplitude (also known as solar scintillation); deep space communication has complex noise interference, including cosmic background noise , solar noise, lunar noise, planetary noise, earth station noise and antenna noise, etc.

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