公开(公告)号：US11363585B2

公开(公告)日：2022-06-14

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.