On redundant index assignments for iterative source-channel decoding

Iterative source-channel decoding (ISCD) exploits the residual redundancy of source codec parameters by using the Turbo principle. A powerful improvement for ISCD is the concept of redundant index assignments. In this letter we present new design and optimization guidelines for redundant index assignments. For block code based redundant index assignments, weak block codes such as a repetition code should be preferred. Simulation results show significant performance improvements.