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Joint source-channel decoding of variable-length codes for convolutional codes and turbo codes

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3 Author(s)
Jeanne, M. ; R&D Div. of France Telecom, Cesson Sevigne, France ; Carlach, J.-C. ; Siohan, P.

Several recent publications have shown that joint source-channel decoding could be a powerful technique to take advantage of residual source redundancy for fixed- and variable-length source codes. This letter gives an in-depth analysis of a low-complexity method recently proposed by Guivarch et al., where the redundancy left by a Huffman encoder is used at a bit level in the channel decoder to improve its performance. Several simulation results are presented, showing for two first-order Markov sources of different sizes that using a priori knowledge of the source statistics yields a significant improvement, either with a Viterbi channel decoder or with a turbo decoder.

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Communications, IEEE Transactions on  (Volume:53 ,  Issue: 1 )