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    • 9. 发明授权
    • Method and apparatus for sub-sampling of a codebook in LTE-A system
    • 在LTE-A系统中对码本进行子采样的方法和装置
    • US09331758B2
    • 2016-05-03
    • US13877637
    • 2011-10-06
    • Lu WuHongwei YangHao Liu
    • Lu WuHongwei YangHao Liu
    • H04B7/02H04B7/04H04L25/03
    • H04B7/0456H04B7/0469H04B7/0478H04L25/03343H04L25/03917H04L25/03923
    • The embodiments of the present invention disclose a method and an apparatus for sub-sampling of a codebook in the LTE-A system where a precoding matrix W is a product of two matrices W1 and W2, i.e. W=W1W2, codebooks for W, W1 and W2 are denoted as C, C1 and C2 respectively, and r indicates a rank. The method includes sub-sampling the codebook C such that the sub-sampled codebook C has a size of equal to or less than 4 bits. In the sub-sampling, codewords evenly distributed in the codebook C are extracted, where some or all of the codewords are in a form of discrete Fourier transform (DFT) vector to be suitable for evenly linear arrays, and the other codewords are suitable for cross-polarized linear arrays.
    • 本发明的实施例公开了一种在LTE-A系统中对码本进行子采样的方法和装置,其中预编码矩阵W是两个矩阵W1和W2的乘积,即W = W1W2,用于W,W1的码本 W2分别表示为C,C1,C2,r表示秩。 该方法包括对码本C进行子采样,使得子采样码本C具有等于或小于4位的大小。 在子采样中,提取均匀分布在码本C中的码字,其中一些或全部码字是离散傅里叶变换(DFT)向量的形式,以适合均匀的线性阵列,其他码字适用于 交叉极化线性阵列。