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    • 68. 发明申请
    • SIGNAL TRANSMISSION METHOD AND APPARATUS USING CODEBOOK IN WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS
    • 信号传输方法和装置在支持多天线的无线通信系统中使用代码
    • WO2011126341A3
    • 2012-03-08
    • PCT/KR2011002488
    • 2011-04-08
    • LG ELECTRONICS INCKO HYUN SOOCHUNG JAE HOONHAN SEUNG HEELEE MOON IL
    • KO HYUN SOOCHUNG JAE HOONHAN SEUNG HEELEE MOON IL
    • H04B7/04H04L27/26H04W88/02H04W88/08
    • H04B7/0473H04B7/0456H04B7/0465H04B7/0469H04B7/0478H04B7/0639H04B7/0669H04L25/03898H04L25/03949H04L27/2602H04L27/2633H04L27/2636H04W72/02H04W72/0446H04W88/02H04W88/08
    • The present invention relates to a wireless communication system, and more particularly to a transmission method and apparatus using a codebook in a wireless communication system supporting multiple antennas. According to one embodiment of the present invention, a method for transmitting, by a base station, a downlink signal using a plurality of transmission antennas comprises the steps of: receiving a PMI from a terminal; applying a precoding matrix indicated by the PMI in a codebook to a plurality of layers, and performing a precoding; and transmitting the precoded signal to the terminal through a plurality of transmission antennas. Among precoding matrices included in the codebook, a precoding matrix for transmission layers which are even in number can be constructed as a 2x2 matrix which contains matrices (W1) as four elements, the matrix (W1) having the number of rows equal to the number of transmission antennas and the number of columns equal to half the number of transmission antennas, wherein the first and second columns of the first row in the 2x2 matrix may be multiplied by a coefficient of 1, the first column of the second row may be multiplied by coefficient "a" of a phase, and the first column of the second row may be multiplied by "-a".
    • 无线通信系统技术领域本发明涉及无线通信系统,更具体地说,涉及在支持多个天线的无线通信系统中使用码本的发送方法和装置。 根据本发明的一个实施例,一种用于使用多个发送天线由基站发送下行链路信号的方法包括以下步骤:从终端接收PMI; 将由码本表示的PMI的预编码矩阵应用于多个层,并执行预编码; 以及通过多个发送天线向所述终端发送所述预编码信号。 在代码本中包括的预编码矩阵中,用于传输层数的预编码矩阵可以被构造为包含矩阵(W1)作为四个元素的2×2矩阵,矩阵(W1)的行数等于数 的发射天线数和等于发射天线数量的一半的列数,其中2×2矩阵中的第一行的第一和第二列可以乘以系数1,第二行的第一列可以被乘以 通过相位的系数“a”,并且第二行的第一列可以乘以“-a”。