公开(公告)号：US20200322933A1

公开(公告)日：2020-10-08

申请号：US16906292

申请日：2020-06-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Min ZHANG ,  Yingfei DIAO ,  Guangwei DONG

IPC: H04W72/04 ,  H04B7/0456

Abstract: A method and an apparatus for obtaining downlink channel information are provided. The method includes, at least, receiving a first pilot signal sent by user equipment by using N first antenna ports, and determining, based on the received first pilot signal, a downlink channel gain matrix corresponding to the N first antenna ports, determining, based on the downlink channel gain matrix corresponding to the N first antenna ports, a first weight matrix corresponding to the N first antenna ports, and sending a second pilot signal to the user equipment. The method further includes receiving a precoding matrix indicator PMI fed back by the user equipment, determining a second weight matrix based on the PMI, and determining, based on the first weight matrix and the second weight matrix, downlink channel information that corresponds to the N first antenna ports and that corresponds to the M second antenna ports.

公开(公告)号：US20240204829A1

公开(公告)日：2024-06-20

申请号：US18589563

申请日：2024-02-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Bolei WANG ,  Yifeng WANG ,  Yingfei DIAO ,  Hongjie HU

IPC: H04B7/0417 ,  H04B7/06

CPC classification number: H04B7/0417 ,  H04B7/0626 ,  H04B7/0634

Abstract: A communication method includes receiving N pilot signals from a network device by using N channel state information (CSI) resources. The N CSI resources are in a one-to-one correspondence with the N pilot signals, N is an integer greater than or equal to 2, and the N pilot signals correspond to N mapping relationships between antenna ports of the network device and transceiver antennas of the network device, wherein at least two of the N mapping relationships between the antenna ports of the network device and the transceiver antennas of the network device are different, or the N pilot signals correspond to N inter-polarization phases, wherein at least two of the N inter-polarization phases are different. The method also includes performing channel measurement on the N CSI resources based on the corresponding pilot signals. The method further includes sending channel state information to the network device.