Patent ID: 11943029
Assignee: LG ELECTRONICS INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 10:
11. A base station operating in a wireless communication system, the base station comprising:
a radio frequency, RF, unit;
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
transmitting, to a terminal, codebook configuration information including information related to a multi-panel codebook,
wherein, based on the information related to the multi-panel codebook, (i) a number of a plurality of panels, (ii) a number of a first antenna ports within a first domain of each of the plurality of panels, and (iii) a number of a second antenna ports within a second domain of each of the plurality of panels are configured; and
transmitting, to the terminal, a Channel State Information (CSI)-Reference Signal (RS),
wherein a number of CSI-RS ports related to the CSI-RS is based on a product of the number of the plurality of panels, the number of the first antenna ports and the number of the second antenna ports; and
receiving, from the terminal, CSI that is computed based on the CSI-RS,
wherein receiving the CSI related to a Precoding Matrix Indicator (PMI) comprises:
receiving first information related to the PMI for wideband; and
receiving second information related to the PMI for each subband,

wherein the first information related to the PMI for wideband includes first fields and a bitwidth of each of the first fields is,
wherein the second information related to the PMI for each subband includes second fields and a bitwidth of each of the second fields is 1,
wherein the first fields and the second fields are used for phase compensation for the plurality of panels, and
wherein the phase compensation for the plurality of panels is applied by compensating for a phase difference between a reference panel, which is one of the plurality of panels, and each of the panels other than the reference panel.