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  • COMPUTER OPERATIONS AND HARDWARE  (1)
  • 2000-2004
  • 1985-1989
  • 1980-1984  (1)
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  • 2000-2004
  • 1985-1989
  • 1980-1984  (1)
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    Cut-off rate calculations for the outer channel in a concatenated cooling system (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Concatenated codes were long used as a practical means of achieving long block or constraint lengths for combating errors on very noisy channels. The inner and outer encoders are normally separated by an interleaver, so that decoded error bursts coming from the inner decoder are randomized before entering the outer decoder. The effectiveness of this interleaver is examined by calculating the cut-off rate of the outer channel seen by the outer decoder with and without interleaving. Interleaving never hurts the performance of a concatenated code, and when the inner code rate is near the cut-off rate of the inner channel, interleaving significantly improves code performance.
    Keywords: COMPUTER OPERATIONS AND HARDWARE
    Type: NASA-CR-173612 , NAS 1.26:173612
    Format: application/pdf
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