公开(公告)号：US20230275729A1

公开(公告)日：2023-08-31

申请号：US18014667

申请日：2020-07-10

Applicant: LG ELECTRONICS INC. ,  Korea Advanced Institute of Science and Technology

Inventor： Seungwon Keum ,  Jaehoon Chung ,  Sangrim Lee ,  Dongho Cho ,  Juyong Lee ,  Sangmi Noh ,  Dangoh Kim ,  Seongjae Kim

IPC: H04L5/00 ,  H04W74/08 ,  H04L27/26

CPC classification number: H04L5/0051 ,  H04W74/0833 ,  H04L27/261 ,  H04L27/2605

Abstract: A method for estimating a phase noise by a wireless device in a wireless communication system according to an embodiment of the present disclosure comprises the steps of: receiving a pre-configured pilot signal and a phase tracking reference signal (PTRS); calculating a first phase noise on the basis of the pre-configured pilot signal; calculating a common phase error (CPE) on the basis of the phase tracking reference signal (PTRS); and estimating a phase noise (PN) on the basis of the first phase noise and the common phase error (CPE). The PN is estimated through interpolation based on a specific reference point, and the specific reference point is based on the first phase noise and the CPE.

公开(公告)号：US11296405B2

公开(公告)日：2022-04-05

申请号：US16006113

申请日：2018-06-12

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Dong-Ho Cho ,  Yun-Sik Kim ,  Lakju Sung ,  Sangmi Noh

IPC: H01Q1/52 ,  H01Q21/24 ,  H01Q15/02 ,  H01Q3/30 ,  H01Q19/06 ,  H01Q1/38

Abstract: A lens antenna apparatus includes a plurality of antenna units and a lens structure configured to change a phase of an electromagnetic wave, emitted by at least one antenna unit among the plurality of antenna units. The lens structure changes the phase such that the overall outputs from the plurality of antenna units have different radiation patterns.

公开(公告)号：US11469787B2

公开(公告)日：2022-10-11

申请号：US16925294

申请日：2020-07-09

Applicant: LG ELECTRONICS INC. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Dangoh Kim ,  Jaehoon Chung ,  Sangrim Lee ,  Dongho Cho ,  Juyong Lee ,  Seungwon Keum ,  Seongjae Kim ,  Sangmi Noh

IPC: H04B1/40 ,  H01P5/19 ,  H01Q15/04

Abstract: A divider for dividing a radio signal includes an input port, a plurality of output ports and a cavity having one surface coupled to the input port and other surface coupled to the plurality of output ports. The other surface is formed as a curved surface, and the plurality of output ports is disposed on the other surface at certain intervals. The side of the cavity is slantly formed from the one surface to the other surface at a certain angle. The distances between the input port and the plurality of output ports is the same.

公开(公告)号：US11115136B1

公开(公告)日：2021-09-07

申请号：US16926539

申请日：2020-07-10

Applicant: LG ELECTRONICS INC. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Seongjae Kim ,  Jaehoon Chung ,  Sangrim Lee ,  Dongho Cho ,  Juyong Lee ,  Seungwon Keum ,  Dangoh Kim ,  Sangmi Noh

IPC: H04B17/12 ,  H04B17/13 ,  H04B7/0452 ,  H01Q21/06 ,  H01Q3/26

Abstract: A method of calibrating an array antenna in a wireless communication system includes a first step of transmitting a radio signal through a first antenna and a second antenna determined among a plurality of antennas included in the array antenna, a second step of measuring the radio signal through a specific coupling antenna of a plurality of coupling antennas adjacent to the plurality of antennas, a third step of estimating an error of the second antenna based on a result of the measurement of the radio signal, and a fourth step of calibrating the second antenna based on the error.