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                <term xml:lang="en">Channel estimation</term>
                <term xml:lang="en">SNR</term>
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              <p>Cet article présente un algorithme itératif permettant l'estimation conjointe du RSB (Rapport Signal à Bruit) et du canal de transmission multi-trajets pour la modulation OFDM (Orthogonal Frequency Division Multiplexing). L'estimation du RSB et du canal, basée sur le critère de l'erreur quadratique moyenne minimale (ou MMSE), aboutit à une structure d'estimateur itérative et conjointe. Aucune connaissance a priori des statistiques des deux paramètres n'est nécessaire pour la mise en oeuvre de la méthode. Nous montrons que cette solution se base sur un algorithme qui converge rapidement, et que les performances d'estimation sont très bonnes, aussi bien pour le RSB que pour le canal. De plus, à performance d'estimation du RSB comparable, notre technique utilise un nombre de pilotes plus faible comparativement à des techniques de référence.</p>
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