Interleaver using co-set partitioning

H - Electricity – 03 – M

Patent

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Details

H03M 13/27 (2006.01) H03M 13/00 (2006.01) H03M 13/29 (2006.01)

Patent

CA 2337914

Construction of a Turbo code interleaves for blocks of any size is facilitated by partitioning the block into co-sets of predetermined size, permuting each co-set with an interleaves whose parameters are selected and optimized for the predetermined size, and recombining the elements of the permuted co-sets according to a predetermined order. Partitioning of the block into co-sets is accomplished by choosing a value n for the number of co-sets, and assigning to each co-set those positions of the block having a common value for modulo-n of the block size. The permuted output may be punctured to maintain a desired ratio.

La construction d'un entrelaceur de codes Turbo destiné à des blocs de toute taille est facilitée par l'exécution des opérations suivantes: partitionnement d'un bloc donné en co-ensembles de taille déterminée, permutation de chaque co-ensemble au moyen d'un entrelaceur dont les paramètres sont sélectionnés et optimisés pour la taille déterminée, et recombinaison des éléments des co-ensembles permutés selon un ordre donné. Le partitionnement du bloc en co-ensembles est réalisé par la sélection d'une valeur n pour le nombre de co-ensembles et par l'attribution à chaque co-ensemble des positions de bloc ayant une valeur commune pour modulo-n de la longueur du bloc. Les éléments de sortie permutés peuvent faire l'objet d'un poinçonnement afin d'obtenir un nombre déterminé d'éléments.

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