Interleaving / deinterleaving device and method for...

H - Electricity – 03 – M

Patent

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H03M 13/27 (2006.01) H04B 7/005 (2006.01) H04Q 7/36 (2006.01)

Patent

CA 2315648

A device for sequentially storing input bit symbols of a given interleaver size N in a memory at an address from 1 to N and reading the stored bit symbols from the memory. The device comprises a look-up table for providing a first variable m and a second variable J satisfying the equation N=2mxJ; and an address generator for generating a read address depending on the first and second variables m and J provided from the look-up table. The read address is determined by 2m(K mod J) + BRO(K/J), where K (0<=K<=(N-1)) denotes a reading sequence and BRO is a function for converting a binary value to a decimal value by bit reversing.

La présente invention concerne un dispositif destiné à stocker séquentiellement des symboles de bit d'entrée d'un entrelaceur donné de taille N dans une mémoire à une adresse allant de 1 à N et à lire les symboles de bit à partir de la mémoire. Le dispositif comprend une table de recherche destinée à fourni une première variable m et une seconde variable J satisfaisant l'équation N=2?m¿xJ; et un générateur d'adresse destiné à générer une adresse de lecture, fonction des première et seconde variables m et J fournie par la table de recherche. L'adresse de lecture est déterminée par 2?m¿(K mod J) + BRO(K/J), où K (0<=K<=(N-1)) dénote une séquence de lecture et BRO est une fonction de conversion de valeur binaire en valeur décimale par inversion de bit.

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