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    • 5. 发明授权
    • Method for determining precoding matrix and corresponding communication methods and devices
    • 用于确定预编码矩阵和相应的通信方法和装置的方法
    • US08861639B2
    • 2014-10-14
    • US13822456
    • 2011-08-24
    • Lu WuJinhui ChenYang SongHongwei YangDi LvHao Liu
    • Lu WuJinhui ChenYang SongHongwei YangDi LvHao Liu
    • H04L27/00H04B7/06H04L25/03H04B7/04
    • H04B7/0456H04B7/0426H04B7/0469H04B7/0617H04B7/0626H04B7/065H04L25/03343
    • A method for determining precoding matrix for the sub-band precoding in a transmitter with M transmitting antennas. The method includes determining an optimized first matrix W1 according to wideband and/or long-term channel properties, multiplying the optimized first matrix W1, with each second matrix W2, in a second codebook, to obtain a plurality of candidate precoding matrices, the second matrix W2 corresponds to frequency-selective and/or short-term channel properties; selecting an optimized one from the plurality of candidate preceding matrices for precoding the data to be transmitted, according to a frequency selection and/or a short-term channel state information. The amount of DFT beams may be increased to improve the spatial resolution; a diagonal matrix is involved in the first matrix W1; and phase adjustment is involved in the second matrix W2, so as to guarantee the adjusted phase is evenly distributed among the whole phase space.
    • 一种用于确定具有M个发射天线的发射机中的子带预编码的预编码矩阵的方法。 该方法包括:根据宽带和/或长期信道特性,在第二码本中将优化的第一矩阵W1与每个第二矩阵W2相乘,以确定优化的第一矩阵W1,以获得多个候选预编码矩阵,第二 矩阵W2对应于频率选择和/或短期信道特性; 根据频率选择和/或短期信道状态信息,从所述多个候选先前矩阵中选择优化的一个,用于对要发送的数据进行预编码。 可以增加DFT光束的量以提高空间分辨率; 对角矩阵涉及第一矩阵W1; 并且第二矩阵W2中涉及相位调整,以保证调整后的相位在整个相位空间内均匀分布。
    • 6. 发明授权
    • Method and device used for feedback of channel information and precoding
    • 用于信道信息和预编码反馈的方法和设备
    • US08817634B2
    • 2014-08-26
    • US13522084
    • 2010-01-13
    • Jinhui ChenDong Li
    • Jinhui ChenDong Li
    • H04L12/26
    • H04L1/0026H04B7/0417H04B7/0421H04B7/0639H04L1/0028H04L1/06
    • The invention proposes a technical scheme (called as explicit feedback (used for feeding the information of downlink channels back to a base station at the user terminal of a wireless communication system, and a technical scheme for precoding the data transmitted to the user terminal based on the information of downlink channels feed back by the user terminal in the base station. The user terminal determines an approximately equivalent matrix of the transmission matrix of downlink channel, based on the transmission matrix of downlink channel, the number of downlink data streams, the spatial correlation matrix of multiple transmitting antennas in the base station and a predetermined codebook; then feeds the information concerning the approximately equivalent matrix back to the base station. The base station recovers the approximately equivalent matrix based on the information concerning the approximately equivalent matrix fed back from the user terminal, and precodes the downlink data transmitted to the user terminal by using the approximately equivalent matrix.
    • 本发明提出了一种技术方案(被称为显式反馈(用于将下行链路信道的信息反馈给无线通信系统的用户终端处的基站,以及用于对根据用户终端发送的用户终端的数据进行预编码的技术方案) 下行链路信道的信息由基站中的用户终端反馈,用户终端基于下行链路信道的传输矩阵,下行链路数据流的数量,空间的数量来确定下行链路信道的传输矩阵的近似等效矩阵 基站中的多个发射天线的相关矩阵和预定的码本;然后将关于近似等效的矩阵的信息反馈给基站,基站基于从大约等效的矩阵反馈的信息来恢复近似等效的矩阵 用户终端,并对下行链路数据t进行预编码 通过使用近似等效的矩阵发送到用户终端。
    • 7. 发明申请
    • TRANSFORMATION APPARATUS AND METHOD
    • 转换装置和方法
    • US20130022141A1
    • 2013-01-24
    • US13639580
    • 2010-04-07
    • Yang SongJinhui ChenHongwei Yang
    • Yang SongJinhui ChenHongwei Yang
    • H04L27/28
    • H04L25/03343H04B7/0617H04B7/0634H04B7/065H04L2025/03414H04L2025/03426H04L2025/03808
    • The present invention provides a transformation apparatus for transforming a long-term wideband channel property feedback. The transformation apparatus comprises: a first transformation unit for constructing an estimation Restimation of a long-term wideband transmit spatial correlation matrix with a long-term wideband beamforming matrix u1 as fed back from a receiver, wherein Restimation=u1u1H, wherein H indicates the conjugate transposition of a matrix; and/or a second transformation unit for directly obtaining a long-term wideband beamforming matrix or a precoding matrix by using a long-term wideband transmit spatial correlation matrix as fed back from a receiver. According to the technical solution of the present invention, a corresponding transformation method and apparatus is also provided.
    • 本发明提供一种用于变换长期宽带频道特性反馈的变换装置。 该变换装置包括:第一变换单元,用于构建估计值从接收器反馈的长期宽带发射空间相关矩阵与长期宽带波束成形矩阵u1的重新构成,其中Restimation = u1u1H,其中H表示共轭 矩阵的转置; 和/或第二变换单元,用于通过使用从接收器反馈的长期宽带发射空间相关矩阵直接获得长期宽带波束形成矩阵或预编码矩阵。 根据本发明的技术方案,还提供了相应的变换方法和装置。