A High-Speed FPGA-Based Lossless Data Compression Design for the X-ray Spectrometer Solar Energy Spectra

In order to meet the real-time compression requirements effectively for the solar energy spectrum data of the X-ray spectrometer used as a key payload of Chang'E Mission, the design and implementation of the bit wise OR algorithm based on FPGA is presented in this paper. This algorithm is loss less, and according to the correspondence between different levels of decomposition and logic OR operations, the design can achieve its computational power by employing techniques as appropriate timing control, module reuse, parallel operating modules. Experiment results show that this hardware architecture can compress single data packet within the time range 27us-30us at 30MHz clock frequency and is adapted for compression ratios of about 2.7-31.4. This FPGA architecture has high speed and efficiency and can provide valuable experience and preparation for data compression applications of the particle X-ray spectrometer in ChangE-3 satellite.