Patent ID: 11956039
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. The method of claim 9, wherein the first set of beam vectors is created by:
obtaining a channel matrix Hm for each of a number, M, of terminal devices, where Hm is a Tm×TA matrix for an m-th terminal device out of the M terminal devices, m is an integer and M≥m>1, TA is a number of antennas at the network device and TA=K, and Tm is a number of antennas at the m-th terminal device;
calculating Rm=HmHHm, where HmH is a Hermitian conjugate of Hm;
calculating a covariance of Rm over the M terminal devices as R=E(Rm), where E( ) denotes mathematical expectation; and
calculating an eigen decomposition of R as R=QHDQ, wherein each column of Q is one beam vector of the first set.