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1. 发明授权

US09331758B2 Method and apparatus for sub-sampling of a codebook in LTE-A system 有权
标题翻译：在LTE-A系统中对码本进行子采样的方法和装置
公开(公告)号：US09331758B2
公开(公告)日：2016-05-03
申请号：US13877637
申请日：2011-10-06
申请人： Lu Wu , Hongwei Yang , Hao Liu
发明人： Lu Wu , Hongwei Yang , Hao Liu
IPC分类号： H04B7/02 , H04B7/04 , H04L25/03
CPC分类号： H04B7/0456 , H04B7/0469 , H04B7/0478 , H04L25/03343 , H04L25/03917 , H04L25/03923
摘要： 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.
摘要翻译：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。

2. 发明授权

US08861639B2 Method for determining precoding matrix and corresponding communication methods and devices 有权
标题翻译：用于确定预编码矩阵和相应的通信方法和装置的方法
公开(公告)号：US08861639B2
公开(公告)日：2014-10-14
申请号：US13822456
申请日：2011-08-24
申请人： Lu Wu , Jinhui Chen , Yang Song , Hongwei Yang , Di Lv , Hao Liu
发明人： Lu Wu , Jinhui Chen , Yang Song , Hongwei Yang , Di Lv , Hao Liu
IPC分类号： H04L27/00 , H04B7/06 , H04L25/03 , H04B7/04
CPC分类号： H04B7/0456 , H04B7/0426 , H04B7/0469 , H04B7/0617 , H04B7/0626 , H04B7/065 , H04L25/03343
摘要： 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.
摘要翻译：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。

3. 发明申请

US20130170578A1 METHOD FOR DETERMINING PRECODING MATRIX AND CORRESPONDING COMMUNICATION METHODS AND DEVICES 有权
标题翻译：用于确定预测矩阵的方法和相应的通信方法和设备
公开(公告)号：US20130170578A1
公开(公告)日：2013-07-04
申请号：US13822456
申请日：2011-08-24
申请人： Lu Wu , Jinhui Chen , Yang Song , Hongwei Yang , Di Lv , Hao Liu
发明人： Lu Wu , Jinhui Chen , Yang Song , Hongwei Yang , Di Lv , Hao Liu
IPC分类号： H04B7/04
CPC分类号： H04B7/0456 , H04B7/0426 , H04B7/0469 , H04B7/0617 , H04B7/0626 , H04B7/065 , H04L25/03343
摘要： A method for determining precoding matrix for the sub-band precoding in a transmitter, wherein the transmitter has M transmitting antennas, and the method comprises: a. determining an optimized first matrix W1 according to wideband and/or long-term channel properties, with the first matrix W1 corresponding to wideband and/or long-term channel properties; b. multiplying the optimized first matrix W1, with each second matrix W2, in a second codebook, so as to obtain a plurality of candidate precoding matrices, the second matrix W2 corresponds to frequency-selective and/or short-term channel properties; c. 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; characterized in that, the amount of DFT beams is increased to improve the spatial resolution; a diagonal matrix is involved in said first matrix W1; and phrase adjustment is involved in said second matrix W2, so as to guarantee the adjusted phrase is evenly distributed among the whole phrase space.
摘要翻译：一种用于确定发射机中的子带预编码的预编码矩阵的方法，其中所述发射机具有M个发射天线，并且所述方法包括：a。根据宽带和/或长期信道特性确定优化的第一矩阵W1，其中第一矩阵W1对应于宽带和/或长期信道特性; b。将优化的第一矩阵W1与每个第二矩阵W2相乘在第二码本中，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/或短期信道属性; C。根据频率选择和/或短期信道状态信息，从所述多个候选前置矩阵中选择优化的一个，用于对要发送的数据进行预编码; 其特征在于，增加DFT光束的量以提高空间分辨率; 所述第一矩阵W1中涉及对角矩阵; 并且在所述第二矩阵W2中涉及短语调整，以便保证所调整的短语在整个短语空间中均匀分布。

4. 发明授权

US08953701B2 Precoding method and precoder for cross-polarized antenna array 有权
标题翻译：交叉极化天线阵列的预编码方法和预编码器
公开(公告)号：US08953701B2
公开(公告)日：2015-02-10
申请号：US13977846
申请日：2012-01-03
申请人： Jinhui Chen , Lu Wu , Yang Song , Hongwei Yang , Di Lv , Hao Liu
发明人： Jinhui Chen , Lu Wu , Yang Song , Hongwei Yang , Di Lv , Hao Liu
IPC分类号： H04B7/02 , H04B7/04 , H04B7/06 , H04B7/10
CPC分类号： H04B7/0478 , H04B7/0469 , H04B7/0634 , H04B7/10
摘要： The present invention provides a precoding method for a cross-polarized antenna array, the cross-polarized antenna array comprising a first group of coplanar polarized antennas and a second group of coplanar polarized antennas, the method comprising the following steps: generating, for at least one layer of data stream, a feedback codebook comprising a plurality of codewords; receiving a selection of the codeword in the feedback codebook; determining a corresponding codeword from the feedback codebook according to the received selection; generating a precoding matrix based on the determined codeword to precode the at least one layer of data stream; wherein each codeword in the feedback codebook comprises a first coefficient portion corresponding to a first group of coplanar polarized antennas and a second coefficient portion corresponding to the second group of coplanar polarized antennas, and there is a complex scaling relation between the coefficients in the first coefficient portion and the second coefficient portion corresponding to the same layer of data stream. Correspondingly, the present invention further provides a precoder for a cross-polarized antenna array.
摘要翻译：本发明提供了一种交叉极化天线阵列的预编码方法，所述交叉极化天线阵列包括第一组共面极化天线和第二组共面极化天线，所述方法包括以下步骤：至少产生一层数据流，包括多个码字的反馈码本; 在所述反馈码本中接收所述码字的选择; 根据接收到的选择从反馈码本确定相应的码字; 基于所确定的码字生成预编码矩阵以对所述至少一个数据流层进行预编码; 其中所述反馈码本中的每个码字包括对应于第一组共面极化天线的第一系数部分和对应于所述第二组共面极化天线的第二系数部分，并且所述第一系数中的系数之间存在复数的缩放关系部分和第二系数部分对应于同一层数据流。相应地，本发明还提供了一种用于交叉极化天线阵列的预编码器。

5. 发明申请

US20140211684A1 METHOD AND SYSTEM FOR CHANNEL FEEDBACK IN WIRELESS COMMUNICATIONS 审中-公开
标题翻译：无线通信中信道反馈的方法与系统
公开(公告)号：US20140211684A1
公开(公告)日：2014-07-31
申请号：US14239437
申请日：2012-08-14
申请人： Hao Liu , Hongwei Yang , Lu Wu
发明人： Hao Liu , Hongwei Yang , Lu Wu
IPC分类号： H04W72/00
CPC分类号： H04W72/005 , H04B7/024 , H04B7/0469 , H04B7/0478 , H04B7/0639 , H04B7/065
摘要： Embodiments of the present invention generally relate to a method and system of channel feedback in wireless communications. Specifically, according to embodiments of the present invention, there is provided a two-stage Co MP feedback mechanism, such that different types of channel feedback are transmitted in each stage. Specifically, during the first stage, information regarding long-term features and/or wideband features of a channel is fed back; while during the second stage, information regarding short-term features and/or narrow features of channel is fed back. The first stage and the second stage may be periodically repeated. The information fed back during the first and second stages are used to calculate feedback information characterizing a joint-channel feature. In this way, overheads associated with channel feedback may be effectively reduced. Corresponding methods and apparatuses are also disclosed.
摘要翻译：本发明的实施例一般涉及无线通信中的信道反馈的方法和系统。具体地，根据本发明的实施例，提供了两级Co MP反馈机制，使得在每个级中传送不同类型的信道反馈。具体来说，在第一阶段期间，反馈信道的长期特征和/或宽带特征的信息; 而在第二阶段期间，反馈关于信道的短期特征和/或窄特征的信息。可以周期性地重复第一阶段和第二阶段。在第一和第二阶段反馈的信息用于计算表征联合频道特征的反馈信息。以这种方式，可以有效地减少与信道反馈相关联的开销。还公开了相应的方法和装置。

6. 发明申请

US20130279619A1 PRECODING METHOD AND PRECODER FOR CROSS-POLARIZED ANTENNA ARRAY 有权
标题翻译：用于跨极化天线阵列的预测方法和预编码
公开(公告)号：US20130279619A1
公开(公告)日：2013-10-24
申请号：US13977846
申请日：2012-01-03
申请人： Jinhui Chen , Lu Wu , Yang Song , Hongwei Yang , Di Lv , Hao Liu
发明人： Jinhui Chen , Lu Wu , Yang Song , Hongwei Yang , Di Lv , Hao Liu
IPC分类号： H04B7/04
CPC分类号： H04B7/0478 , H04B7/0469 , H04B7/0634 , H04B7/10
摘要： The present invention provides a precoding method for a cross-polarized antenna array, the cross-polarized antenna array comprising a first group of coplanar polarized antennas and a second group of coplanar polarized antennas, the method comprising the following steps: generating,for at least one layer of data stream,a feedback codebook comprising a plurality of code-words; receiving a selection of the codeword in the feedback codebook; determining a corresponding codeword from the feedback codebook according to the received selection; generating a precoding matrix based on the determined codeword to precode the at least one layer of data stream; wherein each codeword in the feedback codebook comprises a first coefficient portion corresponding to a first group of coplanar polarized antennas and a second coefficient portion corresponding to the second group of coplanar polarized antennas, and there is a complex scaling relation between the coefficients in the first coefficient portion and the second coefficient portion corresponding to the same layer of data stream. Correspondingly, the present invention further provides a precoder for a cross-polarized antenna array.
摘要翻译：本发明提供了一种交叉极化天线阵列的预编码方法，所述交叉极化天线阵列包括第一组共面极化天线和第二组共面极化天线，所述方法包括以下步骤：至少产生一层数据流，包括多个码字的反馈码本; 在所述反馈码本中接收所述码字的选择; 根据接收到的选择从反馈码本确定相应的码字; 基于所确定的码字生成预编码矩阵以对所述至少一个数据流层进行预编码; 其中所述反馈码本中的每个码字包括对应于第一组共面极化天线的第一系数部分和对应于所述第二组共面极化天线的第二系数部分，并且所述第一系数中的系数之间存在复数的缩放关系部分和第二系数部分对应于同一层数据流。相应地，本发明还提供了一种用于交叉极化天线阵列的预编码器。

7. 发明申请

US20130195064A1 METHOD AND APPARATUS FOR IMPROVING ACCURACY OF TRANSMITTING CSI VIA PUCCH 审中-公开
标题翻译：用于提高发送CSI VIA PUCCH的精度的方法和装置
公开(公告)号：US20130195064A1
公开(公告)日：2013-08-01
申请号：US13877625
申请日：2011-10-06
申请人： Hongwei Yang , Lu Wu , Hao Liu
发明人： Hongwei Yang , Lu Wu , Hao Liu
IPC分类号： H04W72/04
CPC分类号： H04W72/0413 , H04B7/0626 , H04B7/0639 , H04B7/0652 , H04L1/0026 , H04L1/003 , H04L1/06
摘要： The present invention discloses a method and apparatus for improving the accuracy of transmitting CSI via PUCCH. The method for improving the accuracy of transmission of channel status information via the physical uplink control channel comprises reducing the number of bits of other channel information transmitted via the physical uplink control channel under the condition that the payload of the physical uplink control channel remains unchanged, and utilizing the thus-saved bits to transmit the channel state information to reduce the degree of sub-sampling the channel state information and thereby improve the accuracy of transmission of the channel status information via the physical uplink control channel. According to the present invention, system performance loss can be reduced.
摘要翻译：本发明公开了一种用于提高通过PUCCH发送CSI的精度的方法和装置。通过物理上行链路控制信道提高信道状态信息的传输精度的方法包括：在物理上行链路控制信道的有效载荷保持不变的条件下，减少经由物理上行链路控制信道发送的其他信道信息的比特数，利用这样保存的比特来传送信道状态信息，以降低信道状态信息的次采样度，从而提高通过物理上行控制信道发送信道状态信息的准确性。根据本发明，可以降低系统性能损失。

8. 发明申请

US20130188745A1 METHOD AND APPARATUS FOR SUB-SAMPLING OF A CODEBOOK IN LTE-A SYSTEM 有权
标题翻译：在LTE-A系统中对子代码进行子采样的方法和装置
公开(公告)号：US20130188745A1
公开(公告)日：2013-07-25
申请号：US13877637
申请日：2011-10-06
申请人： Lu Wu , Hongwei Yang , Hao Liu
发明人： Lu Wu , Hongwei Yang , Hao Liu
IPC分类号： H04B7/04
CPC分类号： H04B7/0456 , H04B7/0469 , H04B7/0478 , H04L25/03343 , H04L25/03917 , H04L25/03923
摘要： 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.
摘要翻译：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。

9. 发明授权

US09094075B2 Methods and apparatuses for generating and feeding back high rank adaptive codebook in multiple input multiple output system 有权
标题翻译：用于在多输入多输出系统中产生和反馈高阶自适应码本的方法和装置
公开(公告)号：US09094075B2
公开(公告)日：2015-07-28
申请号：US13696427
申请日：2010-05-06
申请人： Hao Liu , Yang Song , Di Lv , Hongwei Yang
发明人： Hao Liu , Yang Song , Di Lv , Hongwei Yang
IPC分类号： H04B7/06 , H04B7/04
CPC分类号： H04B7/0639 , H04B7/0469 , H04B7/0482 , H04B7/0486 , H04B7/065
摘要： A method and device for generating and feeding back high rank adaptive codebook in multiple input multiple output system are disclosed in the embodiments of the invention. The method for generating high rank adaptive codebook includes: using different levels of a long time channel correlation matrix to transform different row vectors in high rank basic codebook, so as to aim at the directions of different eigenvectors of the long time channel correlation matrix; and using the transformed row vectors to construct the high rank adaptive codebook. The method of the invention has well system performance gain and no any additional feedback cost.
摘要翻译：在本发明的实施例中公开了一种用于在多输入多输出系统中产生和反馈高秩自适应码本的方法和装置。用于生成高秩自适应码本的方法包括：使用不同级别的长时间信道相关矩阵来变换高级基本码本中的不同行向量，以针对长时间信道相关矩阵的不同特征向量的方向; 并使用变换的行向量来构造高秩自适应码本。本发明的方法具有良好的系统性能增益，没有任何额外的反馈成本。

10. 发明授权

US09083411B2 Device and method of channel information feedback for multi-cell MIMO 有权
标题翻译：用于多小区MIMO的信道信息反馈的装置和方法
公开(公告)号：US09083411B2
公开(公告)日：2015-07-14
申请号：US13521901
申请日：2010-01-13
申请人： Dong Li , Hao Liu , Hongwei Yang , Yang Song
发明人： Dong Li , Hao Liu , Hongwei Yang , Yang Song
IPC分类号： H04B17/00 , H04B7/06 , H04B7/02
CPC分类号： H04B7/0632 , H04B7/024 , H04B7/0626 , H04B7/0639
摘要： A mobile terminal is provided in the present invention, comprising: a channel state information feedback calculating unit configured to calculate a channel state information feedback between the mobile terminal and a serving cell of the mobile terminal and those between the mobile terminal and all cooperating cells; a channel quality information feedback calculating unit configured to calculate a channel quality information feedback for the serving cell of the mobile terminal; and a transmission unit configured to transmit the channel state information feedbacks and the channel quality information feedback to the serving cell. The present invention greatly improves the performance of a LTE-A system and greatly reduces feedback overhead. The present invention is a scalable feedback solution and may be flexibly applied to various coordinated multipoint transmission scenarios.
摘要翻译：本发明提供一种移动终端，包括：信道状态信息反馈计算单元，被配置为计算移动终端与移动终端的服务小区之间的信道状态信息反馈以及移动终端与所有合作小区之间的信道状态信息反馈; 信道质量信息反馈计算单元，被配置为计算移动终端的服务小区的信道质量信息反馈; 以及发送单元，被配置为将信道状态信息反馈和信道质量信息反馈发送到服务小区。本发明大大提高了LTE-A系统的性能，大大降低了反馈开销。本发明是可扩展的反馈解决方案，并且可以灵活地应用于各种协调的多点传输场景。

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