Patent ID: 11923929
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A channel information obtaining method, comprising:
receiving, by a second network device, N third reference signals from a first network device, wherein N is a quantity of ports of the third reference signals, and N is an integer greater than or equal to 2;
generating, by the second network device, N fourth reference signals, wherein an nth fourth reference signal is generated after the second network device precodes an nth third reference signal based on a second precoding matrix θn(n=1, 2, . . . , N), n∈[1, N], the second precoding matrix is used to process a second channel vector h4,d to obtain a third channel vector h3,d, a quantity of ports of h3,d is less than a quantity of ports of h4,d, h4,d is a channel vector of a channel between the first network device, the second network device, and a dth port of a terminal device, d∈[1, D], D is a quantity of ports of the terminal device, and D is a positive integer; and
sending, by the second network device, the N fourth reference signals to the terminal device.