公开(公告)号：US11277178B2

公开(公告)日：2022-03-15

申请号：US16997670

申请日：2020-08-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ruiqi Zhang ,  Xueru Li ,  Di Zhang

IPC: H04B7/02 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/0413

Abstract: Channel state information (CSI) sending methods, apparatuses, and systems are disclosed. In an implementation, a method comprises: receiving, by a network device from a terminal device, channel state information (CSI) comprising a rank indicator (RI), indication information, and a second precoding matrix indicator (PMI2); determining, by the network device, the RI and the indication information from the CSI; determining, by the network device, the PMI2 based on the RI and the indication information; and determining, by the network device, a precoding matrix W based on the RI and the PMI2, wherein W satisfies W=W1×W2, W is an Nt by L matrix, W1 is an Nt by 2I matrix, W2 is a 2I by L matrix, L is a rank indicated by the RI, Nt is greater than or equal to L, and I is an integer greater than or equal to 1.

公开(公告)号：US11101955B2

公开(公告)日：2021-08-24

申请号：US16579647

申请日：2019-09-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xueru Li ,  Jianqin Liu ,  Kunpeng Liu ,  Bingyu Qu ,  Yongxing Zhou

IPC: H04L5/00 ,  H04B7/0413 ,  H04B7/06

Abstract: Embodiments of this application provide a channel state information transmission method, a terminal device, and a network device. The method includes: sending, by a terminal device, a first reference signal through a first antenna port set, where the first antenna port set includes n antenna ports; receiving, by the terminal device, a second reference signal through a second antenna port set, where the second antenna port set includes N antenna ports, and the first antenna port set is a proper subset of the second.

公开(公告)号：US11057085B2

公开(公告)日：2021-07-06

申请号：US16886143

申请日：2020-05-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xueru Li ,  Ruiqi Zhang

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

Abstract: A bit field indication manner is provided. A first field is determined, where the first field includes T1 bits, at least one of the T1 bits indicates at least two elements {bi0, bi1, . . . , bik} in a set B, the at least one bit further indicates at least one element {θj0, θj1, . . . , θjh} in a set Φ, and at least one element in {bi0, bi1, . . . , bik} and at least one element in {θj0, θj1, . . . , θjh} are used to form a preceding matrix, where the set B={b0, b1, L, bT2−1}, an element in the set B is a vector with a length of N/4, the set Φ={θ0, θ1, . . . , θS−1}, an element in Φ is a complex number of a unit amplitude.

公开(公告)号：US10693537B2

公开(公告)日：2020-06-23

申请号：US16560768

申请日：2019-09-04

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xueru Li ,  Ruiqi Zhang

IPC: H04B7/0456 ,  H04B7/0417

Abstract: A bit field indication manner is provided. A first field is determined, where the first field includes T1 bits, at least one of the T1 bits indicates at least two elements {bi0, bi1, . . . , bik} in a set B, the at least one bit further indicates at least one element {θj0, θj1, . . . , θjh} in a set Φ, and at least one element in {bi0, bi1, . . . , bik} and at least one element in {θj0, θj1, . . . , θjh} are used to form a precoding matrix, where the set B={b0, b1, . . . , bT2−1}, an element in the set B is a vector with a length of N/4, the set Φ={θ0, θ1, . . . , θS−1}, an element in Φ is a complex number of a unit amplitude.

公开(公告)号：US10270505B2

公开(公告)日：2019-04-23

申请号：US16146599

申请日：2018-09-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ruiqi Zhang ,  Xueru Li ,  Di Zhang

IPC: H04B7/02 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/0413

Abstract: A channel state information sending method, a channel state information receiving method, and a device are disclosed, to reduce resource overheads required when a terminal device feeds back CSI to a network device in a scenario of a high precision codebook-based precoding matrix. The method includes: determining, by a terminal device, a precoding matrix W; sending, by the terminal device, a signal including CSI to a network device; obtaining, by the network device, an RI and indication information based on the signal including the CSI; obtaining, by the network device, a PMI2 based on the RI and the indication information; and determining, by the network device, the precoding matrix W based on the rank indicator RI and the second precoding matrix indicator PMI2.