Patent ID: 11962372
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of controlling multi-antenna transmission, the method comprising:
determining a channel matrix representing characteristics of a multi-path channel between a transmitter device equipped with multiple transmitter antennas and at least one receiver device equipped with one or more receiver antennas, the channel matrix being organized in one or more channel vectors each associated with a corresponding one of the one or more receiver antennas;
applying an iterative optimization algorithm to determine a precoding matrix from the channel matrix;
setting at least one step size of the iterative optimization algorithm depending on a vector norm of at least one of the one or more channel vectors; and
controlling multi-antenna transmission by the transmitter device based on the determined precoding matrix.