Method of enhanced max-log-a posteriori probability processing

Details Method of enhanced max-log-a posteriori probability processing Method of enhanced max-log-a posteriori probability processing

G - Physics

06

F

G06F 11/08 (2006.01) G11B 20/18 (2006.01) H03M 13/27 (2006.01) H03M 13/29 (2006.01) H03M 13/39 (2006.01)

Patent

CA 2245603

The invention comprises an enhancement to max-log-APP processing that significantly reduces performance degradation associated with introducing the "max" approximation into log-APP computations, while still maintaining lower computational complexity associated with max-log-APP processing. This enhancement is achieved by adjusting extrinsic information produced by a max-log-APP process where the magnitude of the extrinsic information is reduced, for example, by multiplying it with a scale factor between 0 and 1. An embodiment of the invention further provides an efficient method of storing the extrinsic information.

Cette invention comporte une amélioration au traitement max-log-APP qui réduit notablement la dégradation de la performance associée à l'approximation "max" dans les calculs log-APP tout en maintenant la moindre complexité informatique associée au traitement max-log-APP. Cette amélioration est obtenue en ajustant l'information extrinsèque produite par un traitement max- log-APP dans lequel la grandeur de l'information extrinsèque est réduite, par exemple, en la multipliant par un facteur d'échelle compris entre 0 et 1. Une version de cette invention fournit de plus une méthode de stockage de l'information extrinsèque.

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