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    • 1. 发明授权
    • Nested precoding codebook structures for MIMO systems
    • MIMO系统的嵌套预编码码本结构
    • US08259824B2
    • 2012-09-04
    • US12124529
    • 2008-05-21
    • Badri VaradarajanEko N. OnggosanusiRunhua ChenIl H. Kim
    • Badri VaradarajanEko N. OnggosanusiRunhua ChenIl H. Kim
    • H04K1/10
    • H04B7/0417H04B7/0465H04B7/0478H04B7/063H04B7/0632H04B7/0634H04B7/0639H04L27/2601
    • Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter is for use with NT transmit antennas and includes a precoder unit configured to precode data for transmission using a preceding matrix selected from a nested codebook, wherein the nested codebook provides codebooks corresponding to different transmission layers that are derived from column subsets of multiple NT×NT preceding matrices. The transmitter also includes a transmit unit configured to transmit the precoded data. In another embodiment, the receiver includes a receive unit configured to receive preceded data. The receiver also includes a precoder selection unit configured to select a preceding matrix from a nested codebook for the preceded data, wherein the nested codebook provides codebooks corresponding to different transmission layers that are derived from column subsets of multiple NT×NT preceding matrices.
    • 本公开的实施例提供发射机,接收机和操作发射机和接收机的方法。 在一个实施例中,发射机用于NT发射天线,并且包括预编码器单元,其配置为使用从嵌套码本中选择的先前矩阵来对数据进行预编码,其中嵌套码本提供对应于从列导出的不同传输层的码本 多个NT×NT以前的矩阵的子集。 发射机还包括被配置为发送预编码数据的发射单元。 在另一个实施例中,接收机包括被配置为接收先前数据的接收单元。 接收机还包括预编码器选择单元,其被配置为从先前数据的嵌套码本中选择前一矩阵,其中嵌套码本提供对应于从多个NT×NT先前矩阵的列子集导出的不同传输层的码本。
    • 2. 发明授权
    • CQI feedback for OFDMA systems
    • OFDMA系统的CQI反馈
    • US07961672B2
    • 2011-06-14
    • US12036066
    • 2008-02-22
    • Badri VaradarajanEko No. OnggosanusiRunhua ChenIl H. Kim
    • Badri VaradarajanEko No. OnggosanusiRunhua ChenIl H. Kim
    • H04W4/00
    • H04L1/0029H04L1/0026H04L5/0037H04L5/0053
    • Embodiments of a feedback generator and decoder and methods of operating the feedback generator and decoder are presented. In one embodiment, the feedback generator includes a CQI compression module configured to provide a compressed CQI for the user equipment corresponding to at least one sub-band, where a sub-band is composed of at least one resource block. The feedback generator also includes a transmit module coupled to the CQI compression module and configured to transmit the compressed CQI to a serving base station. In one embodiment, the feedback decoder includes a receive module configured to receive a compressed CQI in the base station from user equipment corresponding to at least one sub-band. The feedback decoder also includes a CQI restoration module coupled to the receive module and configured to provide a restored CQI from the compressed CQI for the at least one sub-band.
    • 提出了反馈发生器和解码器的实施例以及操作反馈发生器和解码器的方法。 在一个实施例中,反馈发生器包括CQI压缩模块,该CQI压缩模块被配置为针对与至少一个子带相对应的用户设备提供压缩CQI,其中子带由至少一个资源块组成。 反馈发生器还包括耦合到CQI压缩模块并被配置为将压缩的CQI发送到服务基站的发送模块。 在一个实施例中,反馈解码器包括接收模块,其被配置为从与至少一个子带对应的用户设备接收基站中的压缩CQI。 所述反馈解码器还包括耦合到所述接收模块的CQI恢复模块,并且被配置为从所述至少一个子带的压缩CQI提供恢复的CQI。