公开(公告)号：US20160344465A1

公开(公告)日：2016-11-24

申请号：US15229576

申请日：2016-08-05

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jianguo Wang ,  Yongxing Zhou ,  Leiming Zhang

IPC: H04B7/06

CPC classification number: H04B7/0626 ,  G06F17/16 ,  H04B7/0413 ,  H04B7/0634 ,  H04B7/0639 ,  H04N19/124

Abstract: Embodiments of the present invention provide a method for feeding back channel state information, a user equipment, and a base station, to improve feedback precision of channel state information. The method includes: receiving a reference signal sent by a base station; selecting a precoding matrix W from a codebook according to the reference signal, where a column vector of the precoding matrix W may be expressed as α[v ejφv]T, v=[1 ejθ]; and sending a precoding matrix indicator PMI to the base station, where the PMI is corresponding to the selected precoding matrix W. The present invention may further improve quantization precision and achieve balance between overheads and the quantization precision. The base station performs precoding on a sent signal according to a fed back precoding matrix indicator, which can improve precoding precision, thereby improving a data transmission rate and system throughput.

Abstract translation: 本发明的实施例提供了一种用于反馈信道状态信息，用户设备和基站的方法，以提高信道状态信息的反馈精度。 该方法包括：接收由基站发送的参考信号; 根据参考信号从码本中选择预编码矩阵W，其中预编码矩阵W的列向量可以表示为α[vejφv] T，v = [1ejθ]; 并向基站发送预编码矩阵指示符PMI，其中PMI对应于所选择的预编码矩阵W.本发明可以进一步提高量化精度并实现开销和量化精度之间的平衡。 基站根据反馈预编码矩阵指示符对发送的信号进行预编码，这可以提高预编码精度，从而提高数据传输速率和系统吞吐量。

公开(公告)号：US20160197662A1

公开(公告)日：2016-07-07

申请号：US15073147

申请日：2016-03-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Qiang Wu ,  Leiming Zhang ,  Jianghua Liu

IPC: H04B7/06 ,  H04W24/02 ,  H04W72/04

CPC classification number: H04B7/0632 ,  H04B7/0639 ,  H04L1/0026 ,  H04L1/0028 ,  H04W24/02 ,  H04W72/042 ,  H04W88/02

Abstract: The present invention discloses a channel state information feedback method and apparatus. User equipment determines a PMI and a CQI, and a feedback expression manner of the PMI and the CQI, where the feedback expression manner includes a first or a second feedback expression manner, and sends the PMI and the CQI to a network device in the determined feedback expression manner of the PMI and the CQI, where the first feedback expression manner includes: using T CQI values to express CQI of M codewords, and using one PMI value to indicate one PMI, where T is less than M, and there is at least one CQI value that can express CQI of at least two codewords; and the second feedback expression manner includes: using M CQI values to express CQI of M codewords. The present invention may be applied to a scenario in which an antenna quantity increases.

Abstract translation: 本发明公开了一种信道状态信息反馈方法及装置。 用户设备确定PMI和CQI以及反馈表达方式包括第一或第二反馈表达方式的PMI和CQI的反馈表达方式，并将PMI和CQI发送到确定的网络设备 PMI和CQI的反馈表达方式，其中第一反馈表达方式包括：使用T CQI值来表示M个码字的CQI，并且使用一个PMI值来指示一个PMI，其中T小于M，并且存在 可以表示至少两个码字的CQI的至少一个CQI值; 并且第二反馈表达方式包括：使用M个CQI值来表示M个码字的CQI。 本发明可以应用于天线数量增加的情况。

公开(公告)号：US09258044B2

公开(公告)日：2016-02-09

申请号：US14844714

申请日：2015-09-03

Applicant: Huawei Technologies Co., Ltd.

Inventor： Leiming Zhang ,  Qiang Wu ,  Jianghua Liu ,  Jianguo Wang

IPC: H04B7/02 ,  H04B7/04 ,  H04B7/06 ,  H04L1/00

CPC classification number: H04B7/0456 ,  H04B7/0469 ,  H04B7/0639 ,  H04B7/0691 ,  H04L1/0026

Abstract: The present disclosure provides a method for feeding back a precoding matrix indicator, a receive end and a transmit end, where the method includes: selecting, by a receive end, a precoding matrix W from a codebook based on a reference signal, where W ∈ [ X 1 ⁡ ( θ 1 ) X 2 ⁡ ( θ 2 , φ n ) ] , the θ1 and the θ2 indicate a phase difference of weighted values for signal transmission between two neighboring antennas in a first antenna group of a transmit end and a phase difference of weighted values for signal transmission between two neighboring antennas in a second antenna group of the transmit end, the φn indicates a phase difference of weighted values for signal transmission between the first antenna group and the second antenna group, where the signal transmission between the first antenna group and the second antenna group is for a same transmission layer, φ n = ⅇ j ⁢ ⁢ 2 ⁢ π ⁢ ⁢ n M , and sending, by the receive end, a precoding matrix indicator PMI to the transmit end.

Abstract translation: 本公开提供了一种用于反馈预编码矩阵指示符，接收端和发送端的方法，其中该方法包括：基于参考信号从码本中选择预编码矩阵W，其中W∈ [X 1⁡（＆thetas; 1）X 2⁡（＆thetas; 2，＆phgr; n）]，第一个天线中的两个相邻天线之间的信号传输的加权值的相位差 发送端的第二天线组中的两个相邻天线之间的信号传输的加权值的发送端组和相位差表示第一天线组和第二天线组之间的信号传输的加权值的相位差 第二天线组，其中第一天线组和第二天线组之间的信号传输用于相同的传输层， n =ⅇj⁢2＆pgr; ，并且由接收端向发送端发送预编码矩阵指示符PMI。