Cryptography Reference
In-Depth Information
in the associated decoders and by an exchange of information of a probabilistic
type. Turbo codes (1993) opened the way to this type of iterative processing
and, since then, many composite structures based on iterative decoding have
been imagined (or rediscovered). Three of these are detailed in this topic: turbo
codes, both their original version and their recent evolution, iteratively decoded
product codes and LDPC (
Low Density Parity Check
) codes. All these codes
have been adopted in international norms, and understanding their coding pro-
cesses and their decoding algorithms is a basis wide enough to tackle any other
principle of distributed coding and of associated iterative decoding.
