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    • 10. 发明公开
    • METHOD AND ARRANGEMENT IN A WIRELESS COMMUNICATION SYSTEM
    • 无线通信系统中的方法和安排
    • EP2567465A1
    • 2013-03-13
    • EP10727168.6
    • 2010-05-04
    • Telefonaktiebolaget LM Ericsson (publ)
    • RAHMAN, Muhammad ImadurSUN, FanASTELY, David
    • H04B7/04H04B7/06
    • H04B7/0417H04B7/0465H04B7/0617H04B7/0626H04B7/0639H04B7/0665
    • Method and arrangement in a base station for sending data to a user equipment. The base station comprises an instance of a codebook, corresponding to another instance of the codebook comprised in the user equipment. The method comprises obtaining channel state information from a signal received from the user equipment, estimating a channel to be used for transmitting data to the user equipment, calculating a precoder, based on the obtained channel state information. Further is comprised the steps of selecting a precoding index from the codebook based on the calculated precoder, or selecting a precoding index received from the user equipment, precoding data to be transmitted to the user equipment using the calculated precoder and transmitting the precoded data, a non-user dedicated reference signal and the precoding index on the estimated channel to the user equipment. Further, corresponding method and arrangement in a user equipment are described.
    • 用于向用户设备发送数据的基站中的方法和装置。 基站包括码本的实例,对应于包括在用户设备中的码本的另一个实例。 该方法包括从从用户设备接收的信号中获得信道状态信息,估计将被用于向用户设备发送数据的信道,基于所获得的信道状态信息来计算预编码器。 进一步包括以下步骤:基于所计算的预编码器从码本选择预编码索引或者选择从用户设备接收的预编码索引;使用计算出的预编码器对要发送到用户设备的数据进行预编码并发送预编码数据; 非用户专用参考信号和估计信道上的预编码索引发送到用户设备。 此外,描述了用户设备中的对应方法和布置。