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：US10454546B2

公开(公告)日：2019-10-22

申请号：US16248344

申请日：2019-01-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ruiqi Zhang ,  Jianqin Liu

IPC: H04B7/02 ,  H04B7/0456 ,  H04L1/06 ,  H04B7/06 ,  H04W84/04

Abstract: A method and apparatus for precoding matrix indicator feedback reduce a quantity of bits in the feedback. In the method, a terminal device receive a reference signal from a base station and determines a precoding matrix W in a precoding matrix set corresponding to a rank indication. W satisfies W=W1×W2×W3, where W1, W2 and W3 are matrices and respectively corresponding to a first, second and third precoding matrix indicator. None of W1, W2, and W3 is an identity matrix, and the 2M columns in W1 comprise every column in W1×W2. The terminal device transmits the rank indication, the first precoding matrix indicator, the second precoding matrix indicator, and the third precoding matrix indicator to the base station.

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.