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    • 2. 发明授权
    • Method and apparatus for obtaining precoding matrix indicator
    • 获取预编码矩阵指示符的方法和装置
    • US08553799B2
    • 2013-10-08
    • US13434540
    • 2012-03-29
    • Jianguo WangYongxing Zhou
    • Jianguo WangYongxing Zhou
    • H04B7/02
    • H04B7/0641H04B7/0626H04B7/0639H04B7/065H04B7/0663
    • A method and an apparatus for obtaining a precoding matrix indicator is disclosed, which relates to the field of communication technologies. The method includes: obtaining a first rotation matrix according to first channel information; obtaining a first differential matrix according to the first rotation matrix and a currently-obtained instantaneous beam forming matrix/precoding matrix; and quantizing, according to a first differential codebook, a pre-acquired first rank indicator, and preset quantization criteria, the first differential matrix to obtain a differential precoding matrix indicator. The apparatus includes: a first rotation matrix obtaining module, a first differential matrix obtaining module, and a differential precoding matrix indicator obtaining module. The differential PMI is obtained according to the channel information, and the differential PMI is used for feedback.
    • 公开了一种用于获得预编码矩阵指示符的方法和装置,其涉及通信技术领域。 该方法包括:根据第一信道信息获得第一旋转矩阵; 根据第一旋转矩阵和当前获得的瞬时波束形成矩阵/预编码矩阵获得第一差分矩阵; 以及根据第一差分码本量化预先获取的第一秩指示符和预设的量化标准,所述第一差分矩阵以获得差分预编码矩阵指示符。 该装置包括:第一旋转矩阵获取模块,第一差分矩阵获取模块和差分预编码矩阵指示器获取模块。 根据信道信息获得差分PMI,差分PMI用于反馈。
    • 6. 发明申请
    • Method, Codebook, and Base Station for Precoding
    • 方法,码本和预编码基站
    • US20110090985A1
    • 2011-04-21
    • US12983103
    • 2010-12-31
    • Yongxing ZhouQiang Wu
    • Yongxing ZhouQiang Wu
    • H04L27/00H03M7/00
    • H04L25/03929H04B7/043H04B7/0465H04B17/318H04W72/042Y02D70/1262Y02D70/1264Y02D70/444
    • A method, a codebook, and a Base Station (BS) for precoding are provided. The precoding method includes: obtaining a total uplink power of a User Equipment (UE); if the total uplink power is greater than ¾ of a rated total transmit power of antennas, selecting a codeword from a first codebook with imbalanced power between layers; otherwise, selecting a codeword from the first codebook and a second codebook with balanced power between layers, so as for precoding data to be transmitted according to the selected codeword. Thus, a loss of an antenna performance at a high signal-to-noise ratio is reduced, and the loss of the power amplification of the antenna is reduced if the transmit power of the antenna is restricted.
    • 提供了一种用于预编码的方法,码本和基站(BS)。 预编码方法包括:获得用户设备(UE)的总上行链路功率; 如果总上行链路功率大于天线的额定总发射功率的3/4,则选择来自第一码本的码字,其中层之间具有不平衡的功率; 否则,从第一码本中选择码字和在层之间具有平衡功率的第二码本,以便根据所选择的码字对要发送的数据进行预编码。 因此,降低了高信噪比下的天线性能的损失,并且如果天线的发射功率受到限制,天线的功率放大的损失将被降低。
    • 7. 发明申请
    • MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) COMMUNICATION SYSTEM FOR FEEDFORWARDING INTERFERENCE VECTOR INDICATOR
    • 多输入多输出(MIMO)通信系统,用于进行干扰矢量指示
    • US20100329371A1
    • 2010-12-30
    • US12812550
    • 2009-01-09
    • Yongxing ZhouJoon-Il Choi
    • Yongxing ZhouJoon-Il Choi
    • H04B15/00H04L27/28
    • H04B7/0434H04L27/28
    • Provided are a base station configured to provide an interference vector indicator to a terminal, and the terminal configured to recognize at least one remaining precoding vector using the interference vector indicator. Each of the base station and the terminal may configure a mapping table between at least one bit for the interference vector indicator indicating the at least one remaining precoding vector, and a plurality of vectors included in a codebook, based on a probability that the plurality of vectors may be included in a precoding matrix. In this instance, the base station may generate the interference vector indicator using the mapping table, and the terminal may recognize the at least one remaining precoding vector using the mapping table. The mapping table may be differently configured according to various modes.
    • 提供了一种被配置为向终端提供干扰矢量指示符的基站,并且终端被配置为使用干扰矢量指示符来识别至少一个剩余的预编码向量。 基站和终端中的每一个可以在指示所述至少一个剩余预编码向量的干扰矢量指示符的至少一个比特和码本中包括的多个向量之间,基于多个 向量可以包括在预编码矩阵中。 在这种情况下,基站可以使用映射表生成干扰矢量指示符,并且终端可以使用映射表来识别至少一个剩余的预编码向量。 映射表可以根据各种模式被不同地配置。