DEVICE AND METHOD OF BEAMFORMING FOR UPLINK RECEPTION Russian patent published in 2024 - IPC H04B7/417 

FIELD: wireless communication.

SUBSTANCE: present invention relates generally to wireless communication and more specifically to devices and methods of beamforming for receiving data over an uplink (UL). At base station (BS) number (L) of UL reception streams is determined. Configuration data for the CSI are generated at the BS, wherein the configuration data contain at least codebook parameters, wherein the codebook is formed by a set of DFT vectors, and configuration data is transmitted from the BS to the user equipment (UE). At the UE, based on the CSI-RS measurements received from the BS, at least one channel matrix is determined. At the UE: based on at least one channel matrix, calculating a quality metric for each DFT vector from at least part of the set of DFT vectors; based on quality metrics, selecting a subset of DFT vectors using a threshold quantisation parameter (e.g., relative reception power); generating a CSI, wherein the CSI includes at least DFT vector subset information; and transmitting the CSI to the BS. At BS generating beamforming matrix for UL reception, wherein the beamforming matrix is generated based on information on a subset of DFT vectors from the CSI, received from the UE, wherein the number of beamforming vectors making up the BF matrix is set based on L. BS may comprise a radio unit (RU) and a distributed unit (DU), wherein the beamforming matrix is generated in the DU and transmitted to the RU.

EFFECT: present invention provides beamforming in BS for UL reception with required accuracy and maintaining low complexity of LMMSE-IRC receiver, with extension to support communication systems, where extra-large antenna arrays are used, which, in turn, provides high quality of UL reception on the BS side.

35 cl, 13 dwg