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    • 6. 发明授权
    • Rotating reference codebook that is used in a multiple-input multiple-output (MIMO) communication system
    • 在多输入多输出(MIMO)通信系统中使用的旋转参考码本
    • US08488708B2
    • 2013-07-16
    • US12819428
    • 2010-06-21
    • Junil ChoiBruno ClerckxKi Il Kim
    • Junil ChoiBruno ClerckxKi Il Kim
    • H04L1/02
    • H04B7/0417
    • A rotating reference codebook used in a multiple input multiple output (MIMO) communication system is provided. The reference codebook includes codewords from a discrete Fourier transform (DFT) codebook. A base station and a terminal may calculate a rotation matrix based on a previous preferred codeword and a random codeword among codewords included in the DFT codebook. A reference codebook may be rotated using the rotation matrix and may be transformed to a new codebook. The reference codebook may include codewords of a polar cap codebook and the codewords of the DFT codebook. Even though the codewords of the DFT codebook are rotated, the codewords of the DFT codebook may remain in the new codebook as elements of the DFT codebook.
    • 提供了一种在多输入多输出(MIMO)通信系统中使用的旋转参考码本。 参考码本包括来自离散傅里叶变换(DFT)码本的码字。 基站和终端可以基于DFT码本中包括的码字中的先前优选码字和随机码字来计算旋转矩阵。 参考码本可以使用旋转矩阵旋转,并且可以被转换为新的码本。 参考码本可以包括极性码本码字的码字和DFT码本的码字。 即使旋转DFT码本的码字,DFT码本的码字也可以作为DFT码本的元素而保留在新码本中。
    • 7. 发明授权
    • Multiple-input multiple-output communication system using explicit feedback
    • 多输入多输出通信系统采用显式反馈
    • US08494074B2
    • 2013-07-23
    • US12852741
    • 2010-08-09
    • Bruno ClerckxSae hyung ParkJunil ChoiDavid Mazzarese
    • Bruno ClerckxSae hyung ParkJunil ChoiDavid Mazzarese
    • H04B7/02
    • H04B7/0626H04B7/0634
    • A multiple input multiple output (MIMO) communication system using an explicit feedback is provided. In the MIMO communication system using the explicit feedback, a receiver may generate an explicit feedback vector by calculating an explicit channel matrix, and by vectorizing the explicit channel matrix or an explicit channel matrix processed using a predefined function. Feedback information generated based on the explicit feedback vector may be provided to a transmitter. The transmitter may reconfigure the explicit channel matrix or the processed explicit channel matrix based on the feedback information. The transmitter and the receiver may share the explicit channel matrix or the processed explicit channel matrix using an adaptively transformed codebook.
    • 提供了使用明确反馈的多输入多输出(MIMO)通信系统。 在使用显式反馈的MIMO通信系统中,接收机可以通过计算显式信道矩阵,并通过对显式信道矩阵或使用预定义函数处理的显式信道矩阵进行向量化来产生显式反馈向量。 基于显式反馈矢量生成的反馈信息可以被提供给发射机。 发射机可以基于反馈信息来重新配置显式信道矩阵或处理的显式信道矩阵。 发射机和接收机可以使用自适应变换的码本共享显式信道矩阵或处理的显式信道矩阵。