System and method for distributed input distributed output...

H - Electricity – 04 – W

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H04W 24/00 (2009.01) H04W 72/00 (2009.01) H04B 7/005 (2006.01) H04B 7/01 (2006.01)

Patent

CA 2695799

A system and method are described for compensating for frequency and phase offsets in a multiple antenna system (MAS) with multiuser (MU) transmissions ("MU-MAS"). The method may include transmitting a training signal from each antenna of a base station to one of a plurality of wireless client devices, generating frequency offset compensation data, receiving the frequency offset compensation data at the base station, computing MU-MAS precoder weights based on the frequency offset compensation data to precancel the frequency offset at the transmitter, and computing a plurality of MU-MAS precoder weights based on channel characterization data.

L'invention concerne un système et un procédé permettant de compenser les décalages de fréquence et de phase dans un système d'antenne multiple (MAS) avec des transmissions multi-utilisateur (MU) (= MU-MAS =). Le procédé peut comprendre la transmission d'un signal d'entraînement à partir de chaque antenne d'une station de base à l'un d'une pluralité de dispositifs client sans fil, la génération de données de compensation de décalage de fréquence, la réception des données de compensation de décalage de fréquence au niveau de la station de base, le calcul de poids de précodeur MU-MAS en se basant sur les données de compensation de décalage de fréquence pour préannuler le décalage de fréquence au niveau de l'émetteur, et le calcul d'une pluralité de poids de précodeur MU-MAS en se basant sur des données de caractérisation de canal.

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