Turbo Coding
Iterative decoding of binary block and convolutional codes
IEEE Transactions on Information Theory
On the iterative approximation of optimal joint source-channel decoding
IEEE Journal on Selected Areas in Communications
Method for improvement of soft input decryption performances
ICCOMP'08 Proceedings of the 12th WSEAS international conference on Computers
An efficient variable-length code construction foriterative source-channel decoding
IEEE Transactions on Communications
Analysis of serial and parallel soft input decryption schemes over a wireless channel
SPECTS'09 Proceedings of the 12th international conference on Symposium on Performance Evaluation of Computer & Telecommunication Systems
EURASIP Journal on Advances in Signal Processing
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The error robustness of digital communication systems using source and channel coding can be improved by iterative source-channel decoding (ISCD). The turbo-like evaluation of natural residual source redundancy and of artificial channel coding redundancy makes step-wise quality gains possible by several iterations. The maximum number of profitable iterations is predictable by an EXIT chart analysis. In this contribution, we exploit the EXIT chart representation to improve the error correcting/concealing capabilities of ISCD schemes. We propose new design guidelines to select appropriate bit mappings and to design the channel coding component. A parametric source coding scheme with some residual redundancy is assumed. Applying both innovations, the new EXIT-optimized index assignment as well as the appropriately designed recursive nonsystematic convolutional (RNSC) code allow to outperform known approaches to ISCD by far in the most relevant channel conditions.