PRECODING WEIGHT GENERATION METHOD, MOBILE STATION DEVICE AND BASE STATION DEVICE

The data rate of the system overall (frequency use rate) is increased even when dynamically switching between SU-MIMO transmission and MU-MIMO transmission. In a mobile station device (10), a PMI corresponding to the precoding matrix containing a matrix component of the stream most closely approxima...

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Bibliographic Details
Main Authors KUSUME, KATSUTOSHI, TAOKA, HIDEKAZU
Format Patent
LanguageEnglish
French
Japanese
Published 28.07.2011
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Summary:The data rate of the system overall (frequency use rate) is increased even when dynamically switching between SU-MIMO transmission and MU-MIMO transmission. In a mobile station device (10), a PMI corresponding to the precoding matrix containing a matrix component of the stream most closely approximating a channel matrix indicating the channel state of a channel transmission path is selected and fed back to a base station device (20); in a base station device (20), a matrix component for the stream most closely approximating the channel state of the channel path is extracted from among the precoding matrices associated to the PMI fed back from the mobile station device (10), and a precoding weight is generated on the basis of the extracted matrix component. Le débit de données du système dans son ensemble (taux d'utilisation des fréquences) augmente lors de la commutation entre une transmission SU-MIMO (multi-entrées multi-sorties à utilisateur unique) et une transmission MU-MIMO (multi-entrées multi-sorties à utilisateurs multiples. Dans un dispositif de station mobile, un PMI (indicateur de matrice de pré-codage) d'un flux se rapprochant le plus d'une matrice de canal indiquant l'état du chemin de canal de transmission est sélectionné et relayé vers un dispositif de station de base (20). Dans un dispositif de station de base (20), un composant de matrice pour le flux se rapprochant le plus de l'état du chemin de canal est extrait des matrices de pré-codage associées au PMI retourné par le dispositif de station mobile (10) et une pondération de pré-codage est générée sur la base du composant de matrice extrait.
Bibliography:Application Number: WO2011JP50947