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2ème Année CPST
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Détail de l'indexation
M000501
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Ouvrages de la bibliothèque en indexation M000501
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Titre : Les turbo codes et le décodage itératif Type de document : texte imprimé Auteurs : Maali, Abdelmadjid, Auteur ; Berkani, Daoud, Directeur de thèse Editeur : [S.l.] : [s.n.] Année de publication : 2001 Importance : 70 f. Présentation : ill. Format : 30 cm. Note générale : Mémoire de Magister : Électronique : Alger, École Nationale Polytechnique : 2001
Bibliogr. f. 71 - 72Langues : Français (fre) Mots-clés : Turbo codes concaténés
Décodage itératif
Codes correcteurs d'erreursIndex. décimale : M000501 Résumé : Les premiers turbo codes ont été introduit par des codes convolutifs systématiques récursifs et parallèles. Ces codes utilisés en codage de canal, étaient capables d'atteindre un taux d'erreur (BER) arbitrairement faible de 10‾5 avec un SNR de 0.7dB. Les turbo codes peuvent être utilisés dans tous les systèmes de communications qui exigent le minimum d'énergie. Les communications dans l'espace, les communications mobiles par satellite/cellulaire, les liaisons micro-ondes, etc..., sont quelques exemples d'applications de cette nouvelle technique de codage.
Ce travail décrit les performances de la concaténation parallèle et série de deux codeurs convolutifs systématiques récursifs pour de faibles SNR (Eb/N0dB) itérativement décodés avec l'algorithme MAP (maximum a posteriori). En utilisant le domaine du logarithme de vraisemblance, nous montrons que chaque décodeur utilise à son entrée des valeurs a priori et délivre la sortie décodée, les entrées a priori et la valeur extrinsèque. La valeur extrinsèque est utilisée comme une valeur a priori pour la prochaine itération. Les résultats de simulation montrent comment les entrelaceurs aident les décodeurs pour améliorer leur capacité de correction en gardant l'information extrinsèque et les données reçues incorrelées, ils montrent aussi l'influence des différents paramètres sur les performances des turbo codes. Les résultats obtenus sont très satisfaisants.Les turbo codes et le décodage itératif [texte imprimé] / Maali, Abdelmadjid, Auteur ; Berkani, Daoud, Directeur de thèse . - [S.l.] : [s.n.], 2001 . - 70 f. : ill. ; 30 cm.
Mémoire de Magister : Électronique : Alger, École Nationale Polytechnique : 2001
Bibliogr. f. 71 - 72
Langues : Français (fre)
Mots-clés : Turbo codes concaténés
Décodage itératif
Codes correcteurs d'erreursIndex. décimale : M000501 Résumé : Les premiers turbo codes ont été introduit par des codes convolutifs systématiques récursifs et parallèles. Ces codes utilisés en codage de canal, étaient capables d'atteindre un taux d'erreur (BER) arbitrairement faible de 10‾5 avec un SNR de 0.7dB. Les turbo codes peuvent être utilisés dans tous les systèmes de communications qui exigent le minimum d'énergie. Les communications dans l'espace, les communications mobiles par satellite/cellulaire, les liaisons micro-ondes, etc..., sont quelques exemples d'applications de cette nouvelle technique de codage.
Ce travail décrit les performances de la concaténation parallèle et série de deux codeurs convolutifs systématiques récursifs pour de faibles SNR (Eb/N0dB) itérativement décodés avec l'algorithme MAP (maximum a posteriori). En utilisant le domaine du logarithme de vraisemblance, nous montrons que chaque décodeur utilise à son entrée des valeurs a priori et délivre la sortie décodée, les entrées a priori et la valeur extrinsèque. La valeur extrinsèque est utilisée comme une valeur a priori pour la prochaine itération. Les résultats de simulation montrent comment les entrelaceurs aident les décodeurs pour améliorer leur capacité de correction en gardant l'information extrinsèque et les données reçues incorrelées, ils montrent aussi l'influence des différents paramètres sur les performances des turbo codes. Les résultats obtenus sont très satisfaisants.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire M000501 M000501 Papier Bibliothèque centrale Mémoire de Magister Disponible Documents numériques
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