公开(公告)号：US20240030981A1

公开(公告)日：2024-01-25

申请号：US18358459

申请日：2023-07-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Li FAN ,  Shibin GE ,  Jie WANG ,  Zhimeng ZHONG ,  Qibo QIN ,  Huangping JIN

IPC: H04B7/06

CPC classification number: H04B7/0626 ,  H04B7/0639

Abstract: This application discloses a channel state information feedback method and a communication apparatus. The method includes: determining channel state information based on a first codebook, and sending the channel state information. The first codebook is determined based on a channel represented by one or more spatial-frequency domain column vectors, and the one or more spatial-frequency domain column vectors indicate the channel in joint spatial-frequency domain. In this solution, the first codebook may be determined based on the channel represented by the one or more spatial-frequency domain column vectors. Because the one or more spatial-frequency domain column vectors may represent the channel in joint spatial-frequency domain, that is, the first codebook represents the channel based on joint spatial-frequency domain, a joint spatial-frequency domain feature may be fully used, to explore a sparse feature of the channel, thereby improving system performance.

公开(公告)号：US20230239111A1

公开(公告)日：2023-07-27

申请号：US18191350

申请日：2023-03-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping JIN ,  Xiaohan WANG ,  Wei HAN ,  Shibin GE ,  Xiang REN ,  Yong LIU ,  Xiaoyan BI

IPC: H04L5/00

CPC classification number: H04L5/0051 ,  H04L5/0005

Abstract: This application discloses a method for sending a demodulation reference signal, a method for receiving a demodulation reference signal, and a communication apparatus. The method for sending a demodulation reference signal includes: A network device generates a first signal and sends the first signal on a first time-frequency resource, where the first signal is formed by superimposing M DMRS port signals, and delay segmentation locations corresponding to at least two of the M DMRS port signals are different. Because the first signal is formed by superposing the M DMRS port signals, that is, the network device sends a plurality of DMRS port signals on a same time-frequency resource, reference signal overheads can be reduced. The network device sends more DMRS port signals on the same time-frequency resource. In this way, the network device can send more streams without increasing pilot overheads.

公开(公告)号：US20230170951A1

公开(公告)日：2023-06-01

申请号：US18063621

申请日：2022-12-08

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping JIN ,  Xiaohan WANG ,  Xiaoyan BI

IPC: H04B7/0456 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/0626 ,  H04B7/0663

Abstract: This disclosure provides methods and apparatuses for generating precoding vectors. One method includes: receiving a channel state information (CSI) report, wherein the CSI report indicates a quantity of space-frequency vector pairs to be reported for a quantity of R transport layers, wherein a size of an overhead for indicating the quantity of the space-frequency vector pairs is same when the quantity of R is greater than or equal to 2, wherein each of the space-frequency vector pairs comprises one spatial domain vector and one frequency domain vector, and wherein for each of the R transport layers, one or more frequency domain units associated with the transport layer correspond to one or more precoding vectors, and determining the quantity of space-frequency vector pairs according to the CSI report.

公开(公告)号：US20230155646A1

公开(公告)日：2023-05-18

申请号：US18155205

申请日：2023-01-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping JIN ,  Zhimeng ZHONG ,  Haifan YIN ,  Xiaoyan BI

IPC: H04B7/0456

CPC classification number: H04B7/0456 ,  H04B7/0413

Abstract: A channel measurement method and a communications apparatus. The method includes: a terminal device receives precoded reference signals from a network device, where the precoded reference signals are obtained by precoding reference signals based on K angle vectors; and generates and sends first indication information, where the first indication information is used to indicate P weighting coefficients corresponding to P angle-delay pairs, the P weighting coefficients are determined based on the precoded reference signals, each of the P angle-delay pairs includes one angle vector and one delay vector corresponding to the angle vector, a delay vector corresponding to each angle vector is preconfigured, each angle vector and the delay vector corresponding to each angle vector are obtained through uplink channel measurement, and the P angle-delay pairs and the P weighting coefficients corresponding to the P angle-delay pairs are used to determine a precoding matrix.

公开(公告)号：US20220182122A1

公开(公告)日：2022-06-09

申请号：US17681281

申请日：2022-02-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang REN ,  Shibin GE ,  Huangping JIN ,  Xiaohan WANG ,  Peng SHANG

IPC: H04B7/06 ,  H04B7/0413

Abstract: This application provides example channel measurement methods and example communication apparatuses. One example method includes determining L weighting coefficients for determining channels of K moments based on channels of M moments, where L, M, and K are all positive integers. Information about the L weighting coefficients can then be sent.

公开(公告)号：US20220014251A1

公开(公告)日：2022-01-13

申请号：US17486536

申请日：2021-09-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaohan WANG ,  Yongping ZHANG ,  Huangping JIN ,  Xiang GAO ,  Xiaoyan BI

IPC: H04B7/06 ,  H04B7/0417

Abstract: Embodiments of this application provide a communication method and a communications apparatus. The method includes: determining a plurality of frequency domain units on which reporting of a PMI is based in reporting bandwidth. The plurality of frequency domain units include one or more first frequency domain units and third frequency domain units obtained by dividing one or more second frequency domain units. A granularity of the first frequency domain unit is less than a preconfigured first granularity, a granularity of the second frequency domain unit is a first granularity, and a granularity of the third frequency domain unit is a predetermined second granularity. The first granularity is a granularity preconfigured for reporting a CQI, a second granularity is a granularity predetermined for reporting the PMI, and the second granularity is less than the first granularity.

公开(公告)号：US20210314122A1

公开(公告)日：2021-10-07

申请号：US17352108

申请日：2021-06-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huangping JIN ,  Hongzhe SHI ,  Zhimeng ZHONG ,  Haifan YIN ,  Xiaoyan BI

IPC: H04L5/00

Abstract: This application provides a method for configuring channel state information CSI reporting and a communication apparatus. The method includes: A terminal device receives configuration information for CSI reporting, where the configuration information for the CSI reporting is associated with configuration information of a first reference signal and configuration information of a second reference signal, the second reference signal is used for measuring an uplink channel, and the first reference signal is used for measuring a downlink channel. The terminal device performs channel measurement based on the first reference signal and the second reference signal to generate a CSI, and feeds back CSI. By using uplink and downlink channel reciprocity, the terminal device may not need to feed back information with reciprocity, for example, an angle and a delay, so that feedback overheads of the terminal device are reduced.

公开(公告)号：US20210175936A1

公开(公告)日：2021-06-10

申请号：US17157318

申请日：2021-01-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping JIN ,  Xiaohan WANG ,  Xiaoyan BI

IPC: H04B7/0417 ,  H04L25/02 ,  H04B7/0456 ,  H04B7/06

Abstract: Embodiments of this application disclose a channel estimation method and apparatus, and relate to the field of communications technologies. The method may include: generating and sending indication information, where the indication information is used to indicate L space-frequency basis vectors for constructing an M×N-dimensional space-frequency vector; the space-frequency vector includes M N-dimensional precoding vectors, each precoding vector is used in one of M frequency bands, and the space-frequency vector is generated by performing a weighted combination on L space-frequency component vectors; each of the L space-frequency component vectors is a vector including M×N elements that are in one of the L space-frequency basis vectors, and each of the L space-frequency basis vectors is an Nf×N-dimensional vector; the space-frequency basis vector is a three-dimensional oversampled (DFT) vector; and L≥2, Nf≥M≥1, N≥2, and L, M, N, and Nf are all integers.

公开(公告)号：US20210099214A1

公开(公告)日：2021-04-01

申请号：US17119611

申请日：2020-12-11

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang REN ,  Xiaoyan BI ,  Huangping JIN

IPC: H04B7/06 ,  H04B7/0456 ,  H04W72/04 ,  H04W72/06 ,  H04L25/02 ,  H04L5/00

Abstract: Embodiments of this application relate to the field of communications technologies, and disclose a precoding matrix configuration method and apparatus, to help improve performance of decoding data. The method may include: receiving first configuration information, where the first configuration information is used to configure M precoding matrices, M≥2, and M is an integer; and aggregately sending a signal in N time domain units based on the first configuration information, where the signal is a signal obtained after precoding is performed by using a precoding matrix corresponding to each of the N time domain units, the precoding matrix corresponding to each time domain unit is one of the M precoding matrices, N≥2, and N is an integer.

公开(公告)号：US20200212974A1

公开(公告)日：2020-07-02

申请号：US16812658

申请日：2020-03-09

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ye WU ,  Huangping JIN ,  Wei HAN ,  Xiaoyan BI

IPC: H04B7/0456 ,  H04L5/00 ,  H04B7/06 ,  H04B7/0417

Abstract: This application provides a communication method, a communications apparatus, and a system. The method may include receiving, by a terminal device, a first group of precoded reference signals and a second group of precoded reference signals. The method may also include feeding back first indication information based on a channel state information (CSI) feedback-based transmission scheme, where the first indication information is used to determine a plurality of precoding vectors, at least one of the plurality of precoding vectors is determined by using the first group of precoded reference signals, and at least one of the plurality of precoding vectors is determined by using the second group of precoded reference signals.