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              <p>Les codes spatio-temporels pour les systèmes multi-antennaires MIMO sont traditionnellement conçus selon les critères  du rang-déterminant appropriés pour les rapports signal-sur-bruit (RSB) élevés. Cependant, les systèmes de communications utilisent des codes correcteurs d’erreur à fort pouvoir de correction garantissant un faible taux d’erreurs même à des faibles RSB. Dans ce papier, nous proposons un critère de conception des codes espace-temps non-asymptotique basé sur l’information mutuelle au niveau binaire. Selon ce critère, nous optimisons la structure du code trace-orthonormal pour tous les RSB. Ainsi, le code trace-orthonormal proposé devient adaptatif selon le RSB. Le code adaptatif proposé améliore les performances du système, en termes de taux d’erreur binaire, comparativement aux codes spatio-temporels du système WiMAX pour tous les rendements de codage de canal, et ce sans augmenter la complexité du système.</p>
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