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基于FPGA的CCSDS星载数据无损压缩系统设计
Alternative TitleDesign of Lossless Compression System for CCSDS On-board Data Based on FPGA
孙建伟; 张忠伟; 郑铁; 薛长斌; 陈聪
Department空间技术部
Source Publication空间科学学报
2019
Volume39Issue:5Pages:694-700
Language中文
Keyword星载数据 无损压缩
Abstract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.
Other AbstractThe 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.
Indexed ByCSCD
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7227
Collection空间技术部
Recommended Citation
GB/T 7714
孙建伟,张忠伟,郑铁,等. 基于FPGA的CCSDS星载数据无损压缩系统设计[J]. 空间科学学报,2019,39(5):694-700.
APA 孙建伟,张忠伟,郑铁,薛长斌,&陈聪.(2019).基于FPGA的CCSDS星载数据无损压缩系统设计.空间科学学报,39(5),694-700.
MLA 孙建伟,et al."基于FPGA的CCSDS星载数据无损压缩系统设计".空间科学学报 39.5(2019):694-700.
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