Message remapping and encoding

H - Electricity – 03 – M

Patent

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Details

H03M 13/13 (2006.01)

Patent

CA 2630616

Techniques for remapping messages prior to encoding to improve performance are described. L designated messages among K total messages are remapped to L remapped messages, which are associated with L codewords having larger relative distance between these codewords, where L may be much less than K. The L designated messages may be more frequently used messages and/or more important messages. The remapping allows the L codewords with larger relative distance to be sent for the L designated messages, which may improve performance. A transmitter remaps an input message to a remapped message, encodes the remapped message to obtain a codeword, and sends the codeword to convey the input message. A receiver decodes a received codeword to obtain a decoded message and demaps the decoded message to obtain a demapped message, which is an estimate of the input message sent by the transmitter.

l'invention concerne des techniques de remappage de messages avant codage destinées à améliorer les performances. Des messages désignés par L parmi une totalité de messages K sont remappés en messages remappés L qui sont associés à des mots de code L séparés par une distance relative plus importante, L étant bien inférieur à K. Les messages désignés L peuvent être des messages plus fréquemment utilisés et/ou des messages plus importants. Le remappage permet d'envoyer des mots de code séparés par des distances relatives plus importantes pour les messages désignés L, ce qui peut permettre d'améliorer les performances. Un émetteur remappe un message d'entrée en un message remappé, code ce message remappé pour obtenir un mot de code et envoie ce mot de code pour la communication du message d'entrée. Un récepteur décode un mot de code reçu pour obtenir un message décodé, lequel est une estimation du message d'entrée envoyé par l'émetteur.

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