METHOD OF DECODING CORRECTING CODE, FOR EXAMPLE, TURBO-CODE BY ANALYSIS OF EXTENDED SPECTRUM OF WORDS OF CODE

摘要

PROBLEM TO BE SOLVED: To provide a method of decoding a correcting code, for example, a turbo-code by analysis of the extended spectrum of words of the code.SOLUTION: An improved decoding method is provided making it possible to solve the problem of the error floor of a turbo-code or of an LDPC code or more generally of a correcting code from the family of "turbo-like codes", while preserving the same spectral efficiency, without any decrease in the useful throughput of the encoded stream. This result is obtained by an identification, on input to a decoder, of the bits on which an error has a strong impact, and a modification of the likelihoods corresponding to these bits so as to improve the convergence of the decoder.