Method and apparatus for encoding and decoding data

H - Electricity – 03 – M

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H03M 13/00 (2006.01) H03M 13/05 (2006.01) H04L 1/22 (2006.01)

Patent

CA 2531527

A deterministic structure for controlled distribution of weight-2 columns is proposed for a parity-check matrix H that reduces the occurrence of undetected frame errors and significantly enhances the code performance in comparison to a randomly-constructed parity-check matrix. H comprises a non-deterministic section H1 and a deterministic section H2, and wherein H2 comprises a first part comprising a column h having an odd weight greater than 2, and a second part comprising matrix elements for row i, column j equal to 1 for i=j, 1 for 1=j+1, 0 elsewhere.

Une structure de détermination pour une distribution contrôlée de deux colonnes de poids pour une matrice parité-vérification H réduisant l'occurrence d'erreurs de trame non détectées et améliorant considérablement la performance de cote par rapport à une matrice parité-vérification construite de manière aléatoire. H comprend une section de non détermination H¿1? et une section de détermination H¿2?, H¿2? comprenant une première partie renfermant une colonne h ayant un poids en nombre impair supérieur à 2; et une seconde partie comprenant des éléments matriciels pour la rangée i, la colonne j répondant à l'équation 1 pour i = j, 1 pour 1 = j + 1, 0 autrement.

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