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Volume 40 Issue 11
Nov.  2014
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Journal of Beijing University of Aeronautics and Astronautics  > 2014  >  40(11): 1507-1511.
Zhao Qi, Du Yujiao. Simulation of universal CCSDS Turbo-codes decoder of non-standard parameters[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(11): 1507-1511. doi: 10.13700/j.bh.1001-5965.2013.0732(in Chinese)
Citation: Zhao Qi, Du Yujiao. Simulation of universal CCSDS Turbo-codes decoder of non-standard parameters[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(11): 1507-1511. doi: 10.13700/j.bh.1001-5965.2013.0732(in Chinese)
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Simulation of universal CCSDS Turbo-codes decoder of non-standard parameters

doi: 10.13700/j.bh.1001-5965.2013.0732

  • School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 07 Jan 2014
  • Publish Date: 20 Nov 2014
    Abstract
  • A universal Turbo-codes decoder was designed, which not only covers the parameters suggested by consultative committee for space data systems (CCSDS), but also supports other frame length (an integral multiple of 255bit) within 16384bit. Standard and non-standard frame lengths, as comparisons, were both simulated on three decoding algorithms, including MAP, SW-MAP and log-MAP. The algorithms were realized in the form of C++ dynamic link library. Python test program was written to generate random signal of needed length and call the DLL mentioned above for encoding and decoding. The graphs about the relation between signal noise ratio and bit error rate were drawn after data calculation. By simulation, the decoder designed was proved universal. In addition, performance of different algorithms were compared and analyzed. Simulations were done to study the relations between decoding performance and some key parameters, including frame length, bit rate, the number of iterations and so on.

     

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