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    • 21. 发明授权
    • Communication method and apparatus using codebook in MIMO system
    • MIMO系统中使用码本的通信方法和装置
    • US08391394B2
    • 2013-03-05
    • US12819744
    • 2010-06-21
    • Myung Hoon YeonJoon Young ChoJu Ho Lee
    • Myung Hoon YeonJoon Young ChoJu Ho Lee
    • H04B7/02H04L1/02
    • H04B7/0465H04B7/0447H04B7/0617H04B7/0619H04L5/0023H04L27/2614
    • A method and apparatus for transmitting and receiving signals using a codebook which maps each codeword to at least two different antennas is provided for a MIMO system. A transmission method includes mapping multiple codewords to multiple layers; mapping the multiple layers to multiple antennas using a precoding matrix selected from a rank-3 codebook which is designed to map the codewords to different antennas; and transmitting the codewords through paths formed by mapping the layers and the antennas. The precoding matrix of the rank-3 codebook is designed to equalize transmit power ratios between the antennas. The communication method and apparatus is advantageous to solve the problem of transmit power imbalance among the layers and the problem of performance degradation at the high SNR region in the conventional system using the rank-3 precoding matrices.
    • 为MIMO系统提供使用将每个码字映射到至少两个不同天线的码本发送和接收信号的方法和装置。 传输方法包括将多个码字映射到多个层; 使用从被设计为将码字映射到不同天线的等级3码本中选择的预编码矩阵将多层映射到多个天线; 以及通过映射层和天线形成的路径来发送码字。 第3级码本的预编码矩阵被设计为使天线之间的发射功率比相等。 该通信方法和装置有利于解决传统系统中使用秩3预编码矩阵的层间发射功率不平衡问题和高SNR区域性能退化问题。