Channel equalizing method and apparatus, and receiving system

H - Electricity – 04 – N

Patent

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H04N 7/015 (2006.01)

Patent

CA 2656881

A digital broadcast system is disclosed. More specifically, the present invention may estimate a remaining carrier phase error and phase noise by using the equalized data and the decision data of the equalized data. And the present invention may remove the estimated remaining carrier phase error and phase noise from the equalized data. Furthermore, the present invention may estimate and remove an amount of phase change of a channel impulse response (CIR) estimated from the inputted data, and then may perform channel equalization, the phase change is prevented from being compensated by the channel equalizer. Thus, the present invention maximizes the performance of a remaining carrier phase compensation loop, thereby enhancing the receiving performance of the receiving system in a situation undergoing severe and frequent channel changes.

L'invention concerne un système de diffusion numérique. L'invention est caractérisée en ce qu'elle permet l'estimation d'une erreur de phase de la porteuse restante et un bruit de phase au moyen des données égalisées et des données de décision des données égalisées, et elle permet également d'éliminer l'erreur de phase de la porteuse restante et le bruit de phase à partir de données égalisées. De plus, ledit système permet l'estimation et l'élimination d'une quantité de transformations de phases d'une réponse en impulsions des canaux (CIR) estimée à partir de données d'entrée, puis il peut effectuer une égalisation des canaux, ce qui permet d'éviter la compensation de la transformation de phase par l'égaliseur de canaux. Ainsi, l'invention permet de maximiser les performances d'une boucle à compensation à phase de la porteuse, tout en améliorant les performances de réception du système de réception dans une situation soumise à des modifications de canaux sévères et fréquentes.

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