CCSDS无损数据压缩算法的实现与应用研究

无损数据压缩是航天应用和遥感系统的重要业务之一。对CCSDS(空间数据系统咨询委员会)推荐的数据无损压缩标准进行了分析研究,讨论了其推荐算法的基本原理和编码方法,然后基于DSP(数字信号处理器)实现了该算法并对代码进行了优化。实验结果表明,DSP实现的CCSDS标准的无损数据压缩算法的数据处理速率可达11Mbit/s,可用于那些不需要很高数据吞吐率的星上数据处理任务。最后讨论了CCSDS无损数据压缩标准是如何融入CCSDS体制的星载数据系统中的。

Implementation and Application Study of CCSDS Lossless Data Compression Algorithm

Lossless data compression is one of the major services in space flight missions and remote-sensing systems.Based on the preliminary study of CCSDS (Consultative Committee for Space Data System) recommended standard for lossless data compression,the fundamental principles and coding methods for the Rice algorithm recommended by CCSDS were discussed.Then its DSP (Digital Signal Processor) implementation and optimization version were addressed with the input data rate 11Mbit/s.The results in terms of performances show that it can be integrated into on-board data processing module for missions that don't require high throughout rate.Finally,how the lossless data compression was integrated into the CCSDS-based on-board data systems was studied.