公开(公告)号：US20200007205A1

公开(公告)日：2020-01-02

申请号：US16482618

申请日：2018-01-31

Applicant: LG Electronics Inc. ,  Sogang University Research Foundation

Inventor： Haewook PARK ,  Changhyeon KIM ,  Sungin SHIN ,  Wonjin SUNG ,  Hyukjun LEE ,  Jonghyun PARK

IPC: H04B7/0456 ,  H04B7/06 ,  H04B7/08

Abstract: A method for reporting channel state information of a terminal comprises: a step of measuring CSI-RS transmitted from a base station; and a step of reporting CSI generated on the basis of the CSI-RS measurement to the base station, wherein the CSI comprises: a PMI for indicating a precoding matrix from a codebook and an RI for indicating a rank, wherein the PMI comprises a first PMI for a beam group selected by the terminal and a second PMI which comprises a beam sub-group selection information for beams included in the beam group and phase-matching information for each antenna port polarization for the selected beam sub-group, and wherein as the rank increases, the phase-matching information may be indicated with different granularity from each other depending on whether the beam sub-groups selected from the beam group are the same or different.

公开(公告)号：US20210242919A1

公开(公告)日：2021-08-05

申请号：US17274156

申请日：2019-09-05

Applicant: LG ELECTRONICS INC ,  SOGANG UNIVERSITY RESEARCH FOUNDATION

Inventor： Jonghyun PARK ,  Wonjae RYOO ,  Wonjin SUNG ,  Hyukjun LEE ,  Haewook PARK

IPC: H04B7/06 ,  H04B7/0456 ,  H04B7/0491

Abstract: A method for reporting channel state information (CSI) by user equipment (UE) for beamforming based on an antenna array in a wireless communication system according to an embodiment of the present disclosure includes: receiving a channel state information reference signal (CSI-RS); generating channel state information using the CSI-RS and a codebook generated in advance; and reporting the channel state information. The channel state information includes information related to a codevector determined in the codebook, the antenna array has a three-dimensional shape having omnidirectional symmetry, the codebook is generated based on a position of the UE having a center of the three-dimensional shape as an origin, and the position of the UE is represented based on a polar coordinate system.