Research On The Configurable High-Speed Data Demultiplex Technique Based On CCSDS

The transmission of audio, video and lots of experiment data becomes more and more important in the space data transmission system with the development of space science. Aiming at that the spacecrafts adopt CCSDS AOS report in transmitting multiplex audio, video and experiment data in single channel, the research on the demultiplexer to high-speed CADU multi-frame data is carried out to make the data receiving end can demultiplex CADU multi-frame data in different levels of CADU transmission.According as the design assignment of the downlink test device for the aircraft's high-speed communication processor, the configurable high-speed data demultiplexer is carried out ,which can demultiplex the downlink CADU multi-frame data of the high-speed communication processor and validate the performance of the communication processor by comparing the demultiplexer's output data with the source data of the communication processor. The demultiplexer can work with the input multi-frame data in CADU form at 144Mbps which meets the design requirement.Through the research for this thesis, a design scheme of the configurable demultiplexer for different transmission levels of CADU is given and carried out. The configurable high-speed demultiplexer designed in the project can be used not only as a tester but also as a real-time frame-data demultiplexer facing the multi-frame data sent by space crafts. The research in this program has great referenced meaning for the development of multi-level multifunctional demultiplexer.