Generating codes in a communication system

H - Electricity – 04 – L

Patent

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H04L 12/56 (2006.01) H03M 13/23 (2006.01) H03M 13/45 (2006.01) H04L 1/18 (2006.01) H04L 1/00 (2006.01)

Patent

CA 2395219

There are provided an apparatus and method for generating an initial puncturing matrix from which a first sub-code is produced in a communication system having a turbo encoder for generating information symbols, first parity symbols, and second parity symbols for the input of an information bit stream and a sub-code generator for generating sub-codes from the information symbols, the first parity symbols, and the second parity symbols using puncturing matrices, a number of the sub-codes being identical to a number of the puncturing matrices, comprising the steps of selecting as many information symbols as a number of columns in the initial puncturing matrix from the information symbols output from the turbo encoder.

L'invention concerne un dispositif et un procédé permettant de créer une matrice de poinçonnement initiale permettant de produire un premier sous-code dans un système de communication. Ce système de communication comprend un turbocodeur qui génère des symboles de données, des premiers symboles de parité et des seconds symboles de parité pour un train binaire de données d'entrée, et un générateur de sous-code qui génère des sous-codes à partir de ces symboles de données, de ces premiers symboles de parité et de ces seconds symboles de parité au moyen de matrices de poinçonnement, le nombre de sous-codes étant identique au nombre de matrices de poinçonnement. Ce procédé consiste à sélectionner un nombre de symboles de données identique au nombre de colonnes de la matrice de poinçonnement initiale dans les symboles de données de sortie du turbo-codeur.

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