基于FPGA的CCSDS星载数据无损压缩系统设计

孙建伟; 张忠伟; 郑铁; 薛长斌; 陈聪

doi:10.11728/cjss2019.05.694

基于FPGA的CCSDS星载数据无损压缩系统设计

doi: 10.11728/cjss2019.05.694

孙建伟^1,2,
张忠伟¹,
郑铁^1,2,
薛长斌¹,
陈聪^1,2

1. 中国科学院国家空间科学中心北京 100190;
2. 中国科学院大学北京 100049

基金项目:

中国科学院空间科学战略性先导科技专项Ⅱ期项目资助（XDA15020101）

详细信息

作者简介:
孙建伟,sunjianwei729@163.com

中图分类号: V527;TP391
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- 被引次数: 0
出版历程
- 收稿日期: 2018-07-18
- 修回日期: 2019-01-08
- 刊出日期: 2019-09-15

Design of Lossless Compression System for CCSDS On-board Data Based on FPGA

1. National Space Science Center, Chinese Academy of Sciences, Beijing 100190;
2. University of Chinese Academy of Sciences, Beijing 100049

摘要

摘要: 星载数据的无损压缩对星载数据的存储和传输具有重要意义.CCSDS推荐的RICE算法对于实现数据的无损压缩具有很好的效果.本文针对RICE算法中k值选择算法计算量大的缺点，利用预处理样本最大值优化k值的方法，使优化后的算法计算复杂度更低，资源占用率更小，运行时间更短，但压缩比相近.利用FPGA进行硬件实现并通过仿真和试验测试，使星载数据的压缩比达到1.5以上，可以满足星载系统对数据压缩的要求，为星上其他载荷提供更多资源.
- RICE /
- FPGA /
- 星载数据 /
- 无损压缩
Abstract: The growth volume of on-board data such as imagery, spectrum or radar data challenges the storage and transmission tasks on orbits. Hence, a universal lossless data compression algorithm is necessary. The lossless compression algorithm which is based on RICE code and recommended by CCSDS has an efficient performance for on-board data. However, the selection of parameter k consumes much time in this algorithm. In this paper, the method which uses maximum value of samples to optimize the parameter k can be adopted to reduce the complexity and the hardware resource. The proposed algorithm has the same compression ration but shorter run-time comparing with the traditional one. Finally, the proposed algorithm has been implemented by FPGA. The results of the simulation and experiment illustrate that the compression ratio of on-board data can reach 1.5 or more. It can fulfill the requirement of data compression for space borne system and spare more resources for the other payloads on the satellite.
- RICE /
- FPGA /
- On-board data /
- Lossless compression

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参考文献(10)

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