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    • 8. 发明授权
    • Method and apparatus for transmitting signals using codebooks in a wireless communication system that supports multiple antennas
    • 在支持多个天线的无线通信系统中使用码本发送信号的方法和装置
    • US08964866B2
    • 2015-02-24
    • US13807219
    • 2011-07-01
    • Hyunsoo KoJaehoon ChungMoonil Lee
    • Hyunsoo KoJaehoon ChungMoonil Lee
    • H04K1/10H04L27/28H04B7/04H04L25/03H04B7/06H03M13/09H04L27/26
    • H04B7/0456H03M13/09H04B7/0465H04B7/0469H04B7/0478H04B7/0639H04B7/065H04L25/03343H04L25/0391H04L25/03949H04L27/2613
    • The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting signals using codebooks in a wireless communication system that supports multiple antennas. A method in which a base station transmits downlink signals according to one embodiment of the present invention comprises the following steps: receiving a first precoding matrix indicator (PMI) and a second precoding matrix indicator from a terminal; determining a first matrix (W1) from a first codebook including precoding matrixes indicated by the first PMI, determining a second matrix (W2) from a second codebook, including precoding matrices indicated by the second PMI, and determining a precoding matrix (W) based on the first matrix (W1) and second matrix (W2); performing precoding on one or more layers, to which the downlink signals are mapped, using the determined precoding matrix (W); and transmitting the precoded signals to the terminal. Each of the precoding matrices included in the first codebook is a block diagonal matrix, and one block has, as compared to the other block, a form multiplied by a predetermined phase value.
    • 无线通信系统技术领域本发明涉及一种无线通信系统,更具体地,涉及一种在支持多个天线的无线通信系统中使用码本发送信号的方法和装置。 根据本发明的一个实施例的基站传输下行链路信号的方法包括以下步骤:从终端接收第一预编码矩阵指示符(PMI)和第二预编码矩阵指示符; 从包括由所述第一PMI指示的预编码矩阵的第一码本确定第一矩阵(W1),从包括由所述第二PMI指示的预编码矩阵的第二码本确定第二矩阵(W2),以及基于所述预编码矩阵 在第一矩阵(W1)和第二矩阵(W2)上; 使用所确定的预编码矩阵(W)对在所述下行链路信号进行映射的一个或多个层上执行预编码; 并将预编码的信号发送到终端。 包括在第一码本中的每个预编码矩阵是块对角矩阵,并且与其他块相比,一个块具有乘以预定相位值的形式。