Channel coding/decoding apparatus and method for a cdma...

H - Electricity – 03 – M

Patent

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H03M 13/00 (2006.01) H03M 13/13 (2006.01) H04B 7/216 (2006.01) H04L 27/18 (2006.01) H04L 1/00 (2006.01)

Patent

CA 2387832

Disclosed is a method for generating (2k-2t first order Reed-Muller codes from 2k first order Reed-Muller codes based on k input information bits. The method comprises selecting t linearly independent k th order vectors; generating 2t linear combinations by linearly combining the t selected vectors; calculating 2t puncturing positions corresponding to the 2t linear combinations; selecting one kxk matrix out of a plurality of kxk matrixes having kxk inverse matrixes; calculating 2t new puncturing positions by multiplying each of the 2t puncturing positions by the selected kxk matrix; and generating (2k-2t) first order Reed-Muller codes by puncturing the 2t new puncturing positions from the 2k first order Reed-Muller codes.

L'invention concerne un procédé servant à générer des codes de Reed-Muller de premier ordre (2<k>-2<t>) à partir de codes de Reed-Muller de premier ordre 2<k> sur la base de k bits d'informations d'entrée. Ce procédé consiste à sélectionner des vecteurs d'ordre k<ième> de linéarité indépendante t; à générer des combinaisons linéaires 2<t> par combinaison linéaire des vecteurs sélectionnés t; à calculer des positions de perforation 2<t> correspondant aux combinaisons linéaires 2<t>; à sélectionner une matrice k x k dans une pluralité de matrices k x k possédant des matrices inverses k x k; à calculer de nouvelles positions de perforation 2<t> par multiplication de chacune des positions de perforation 2<t> par la matrice sélectionnée k x k; et à générer des codes de Reed-Muller de premier ordre (2<k>-2<t>) par perforation des nouvelles positions de perforation 2<t> à partir de ces codes de Reed-Muller de premier ordre 2<k>.

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