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Space-born Data Transmission

Space-born Data Transmission. Products & Heritages. Version 2015 V1. 30 Years Background. CAST Xi’an has been developing data transmission system and equipment since 1980’s.

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Space-born Data Transmission

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  1. Space-born Data Transmission Products & Heritages Version 2015 V1

  2. 30 Years Background • CAST Xi’an has been developing data transmission system and equipment since 1980’s. • More than 70 subsystems have been supplied and launched for application of Earth resources surveying, environment monitoring, meteorology, ocean surveying and Moon exploration. • CAST Xi’an owns 90% of space data transmission marketin China.

  3. Heritage * International program

  4. Heritage * International program

  5. Heritage Shenzhou-9 Rendezvous and docking Ziyuan 2 First image of the Moon by Chang’e Image of Toutatis by Cheng'e-2 Image of Xi’an City by Gaofen-2 CBERS Chang’e

  6. Data Transmission System • Block Diagram of Data Transmission System Inter-sat Terminal Data Handling OMUX P Amp Pre-processing Compressor Modulator Filter Data from payload LNA AOS Formatting Ciphering Channel Coding Data Stream Solid State Recorder Down Convertor Filter Demodulator Power Bus Data Stream Control Unit TM/TC Modulator Filter Data Bus Control Bus P Amp OMUX Down-link Terminal

  7. Data Transmission System Equipment Level Products • Compressor • Data Processor • Modulator • Demodulator • Controller

  8. Compressor • SPIHT Compressor • Wavelet based compression, with no-list SPIHT coding • Compression ratio is configurable • Program: CBERS-02B, Tianhui-1

  9. Compressor • JPEG2000 Compressor • Based on ISO/IEC CD15444-1 (JPEG2000) • Compression ratio is configurable • Cloud detection for Compression ratio control (optional) • Program: Gaofen-1, Gaofen-2

  10. Compressor • JPEG-LS Compressor • Based on ISO/IEC CD14495(JPEG-LS) • Adaptive compression ratio control (China patent) • Coding bit stream seamless splicing (China patent) • Timing refresh for FPGA • Program: Ziyuan-3, Gaofen 2

  11. Data Processor • Low Speed Processor • CCSDS Standards • Data Rate up to 300Mbps • SEU Tolerant (TMR & Refresh) • RS coding or LDPC coding • Program: Haiyang-2, CEBRS-02B, Yaogan series

  12. Data Processor • Mid Speed Processor • CCSDS Standards • Data Rate up to 3600Mbps • Intermittent work • RS coding or LDPC coding • Program: Gaofen-1, VRSS-1

  13. Data Processor • Integrated Processor • An integrated solution of compression coding, solid state storage and lower-computer control • CCSDS Standards • JPEG-LS • Bus Interface • Program: Kuaizhou I, Kuaizhou II

  14. Modulator • S-Band BPSK Modulator • S-band modulation • Data rate up to 20Mbps • Program: Chang'e-1, Chang'e-2

  15. Modulator • X-Band 450Mbps Modulator • X –band modulation • LDPC encoding functionfor option • Data rate up to 450Mbps • Program: Ziyuan-3, Gaofen-1, Yaogan series

  16. Modulator X-band Multi-ModeModulator • X-band modulation • LDPC encoding functionfor option • Multi-mode modulation • Digital shaping filter • Program: Fengyun 4 (to be launched in 2016)

  17. Modulator • Ka-Band Multi-ModeModulator • Ka-band vector modulation • LDPC encoding functionselectable • Multi-mode modulation • Digital shaping filter • Program: Gaofen 4 (to be launched in 2015)

  18. Demodulator • Low-Data-Rate Digital Demodulator • Low synchronization threshold, wide Doppler acquisition range • Data rate up to75Mbps • ASIC for prevent single event effects (SEE) • DNRZ/Concatenated code • Program: Yaogan-16, Zhongxing 2A

  19. Demodulator • High-Data-Rate Digital Demodulator • All digital parallel demodulation • Data rate up to 450Mbps • Scrubbing • CCSDS Low Density Parity Check (LDPC) decoding

  20. Demodulator • Adaptive-data-rate Digital Demodulator • Adaptive digital demodulation, equalization • Automatic frame synchronization • Data Rate Up to 300Mbps • Scrubbing • CCSDS LDPC and Turbo Product Code (TPC) Decoding

  21. Controller • SDC (Subsystem Distribution Controller) • Small footprint • Low mass • Low power • Program: Yaogan-I, Ziyuan-3, Haiyang-2

  22. Controller • SDC & RTU - I • MIL-STD-1553B • Integrated SDC & RTU • Program: Yaogan series

  23. Controller • SDC & RTU - II • CAN Specification 2.0A • Integrated SDC & RTU • Program: Gaofen-1, Yaogan-II, Tianhui I, Venezuela RS Sat 1

  24. Controller • Integrated Controller Integrated Controller • Integrated SDC & RTU & servocontrol  • ECSS-E-ST-50-12C • ECSS-E-ST-50-13C • MIL-STD-1553B • Reprogram for CPU • FDIR • Program: To be launched in 2017

  25. For more information please contact: marketing@castxian.com

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