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    • 91. 发明申请
    • METHOD FOR TRANSMITTING/RECEIVING A COMP REFERENCE SIGNAL
    • 用于发送/接收COMP参考信号的方法
    • WO2011010904A3
    • 2011-06-30
    • PCT/KR2010004880
    • 2010-07-26
    • LG ELECTRONICS INCKOO JA HOHAN SEUNG HEEKO HYUN SOOCHUNG JAE HOONIHM BIN CHULLEE MOON IL
    • KOO JA HOHAN SEUNG HEEKO HYUN SOOCHUNG JAE HOONIHM BIN CHULLEE MOON IL
    • H04L27/26
    • H04L5/0035H04L5/0048H04L25/0226H04L27/2613H04W72/042
    • Disclosed is a method for transmitting a CoMP reference signal for accurate channel estimation. The CoMP reference signal to be transmitted to a terminal which performs a CoMP operation in a multi-cell environment is a cell-specific reference signal or a CoMP-zone-specific reference signal. A method for transmitting the cell-specific reference signal uses an ID of a CoMP set constituted by cells that perform a CoMP operation, or does not apply a frequency shift value while using the ID of a relevant cell, or uses an ID of a serving cell or a frequency shift value of the serving cell. The cell-specific reference signal is transmitted using a preset specific resource region. A method for transmitting the CoMP-zone-specific reference signal is configured such that the pattern of the sequence of CoMP reference signals varies in each of the CoMP zones, and the pattern can be set in advance. In addition, the reference signal is multiplexed and transmitted using an orthogonal code resource in the event the reference signal is transmitted to a plurality of terminals using the same CoMP zone.
    • 公开了一种用于发送用于准确信道估计的CoMP参考信号的方法。 要发送到在多小区环境中执行CoMP操作的终端的CoMP参考信号是小区特定参考信号或CoMP特定区域参考信号。 用于发送小区特定参考信号的方法使用由执行CoMP操作的小区构成的CoMP集合的ID,或者在使用相关小区的ID时不应用频移值,或者使用服务的ID 小区或服务小区的频移值。 使用预设的特定资源区域发送小区特定参考信号。 配置用于发送CoMP区专用参考信号的方法被配置为使得CoMP参考信号序列的模式在每个CoMP区域中变化,并且可以预先设置模式。 此外,在使用相同的CoMP区域将参考信号发送到多个终端的情况下,使用正交码资源来复用和发送参考信号。
    • 92. 发明申请
    • TRANSMISSION METHOD AND DEVICE FOR A DOWNLINK REFERENCE SIGNAL
    • 用于下行链路参考信号的传输方法和装置
    • WO2011040797A2
    • 2011-04-07
    • PCT/KR2010006750
    • 2010-10-04
    • LG ELECTRONICS INCKO HYUN SOOCHUNG JAE HOONIHM BIN CHULLEE MOON ILHAN SEUNG HEE
    • KO HYUN SOOCHUNG JAE HOONIHM BIN CHULLEE MOON ILHAN SEUNG HEE
    • H04J11/00H04B1/69H04B7/04
    • H04L5/0048H04J13/00
    • The present invention relates to a wireless communication system, and a method and device are disclosed for transmitting a downlink reference signal in the wireless communication system. According to one embodiment of the present invention, a method in which a base station transmits a downlink signal by using a plurality of layers comprises the steps of: multiplexing and transmitting a reference signal for the plurality of layers on the basis of a reference signal pattern on a data region of a downlink subframe; and transmitting data for the plurality of layers on the data region of the downlink subframe, wherein the reference signal for the plurality of layers is a dedicated reference signal (DRS) which is used to demodulate the data for the plurality of layers at a receiving end, and, in the multiplexing of the reference signal, 24 resource element positions comprised in the reference signal pattern are set as 6 groups, the 6 groups are set as 2 higher groups, the reference signal for the plurality of layers is split and placed in the 2 higher groups, and the reference signal for 2 or more layers placed in the same group is subjected to code-division multiplexing (CDM).
    • 无线通信系统技术领域本发明涉及无线通信系统,并且公开了用于在无线通信系统中发送下行链路参考信号的方法和装置。 根据本发明的一个实施例,基站通过使用多个层发送下行链路信号的方法包括以下步骤:基于参考信号模式复用并发送多个层的参考信号 在下行链路子帧的数据区域上; 以及在所述下行链路子帧的数据区域上发送所述多个层的数据,其中,所述多个层的参考信号是用于在接收端解调所述多个层的数据的专用参考信号(DRS) ,并且在参考信号的多路复用中,包括在参考信号模式中的24个资源元素位置被设置为6组,将6组设置为2个较高组,将多个层的参考信号分离并放置在 2个较高组以及放置在同一组中的2个或更多个层的参考信号进行码分复用(CDM)。
    • 93. 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”。