A soft-output decoding algorithm for concatenated systems

  title={A soft-output decoding algorithm for concatenated systems},
  author={Xiao-an Wang and Stephen B. Wicker},
  journal={IEEE Trans. Information Theory},
In order to fully utilize the SDD (soft-decision decoding) capacity of the outer codes in a concatenated system, reliability information on the inner decoder outputs (called soft outputs) needs to be provided to the outer decoder. This paper shows that a modif ied MAP algorithm can be effectively and accurately used to generate such information. In the course of the presentation, a metric based on the reliability information is proposed for the outer decoder. This metric has the Eucl idean… CONTINUE READING