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Turbo codes with rate-m/(M+1) constituent convolutional codes

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Figure

Fig. 1. General structure of a rate- m=(m + 1) RSC encoder with code memory  .
Fig. 2. Possible rectangular error patterns. For (a) binary and (b) double-binary TCs with regular permutations.
Fig. 5. Performance in BER of single 8-state RSC codes with m = 1 and m = 2 . Encoder polynomials: 15 (feedback) and 13 (redundancy) in octal form (DVB-RCS constituent encoder for m = 2 )
Fig. 7. Comparison of performance in FER of two TCs based on both 8-state RSC codes of Fig
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