公开(公告)号：US10992038B2

公开(公告)日：2021-04-27

申请号：US16703154

申请日：2019-12-04

Applicant: Electronics and Telecommunications Research Institute

Inventor： Chung Sup Kim ,  hyuk Je Kim ,  Jong Soo Lim ,  Ju Yeon Hong ,  Young Jun Chong

IPC: H04B17/21 ,  H01Q21/22 ,  H01Q3/26 ,  H04L27/26 ,  H04B17/336

Abstract: A method and apparatus for calibrating a phased array antenna system is disclosed. The method includes receiving a first transmission signal transmitted from a transmitting antenna device, receiving a second transmission signal that is generated by the transmitting antenna device based on an unoccupied frequency band of a receiving array antenna system and a bandwidth of the frequency band, and generating a calibration matrix to calibrate a plurality of antenna elements included in the receiving array antenna system based on a signal magnitude and a phase difference which are calculated for each of the antenna elements using the first transmission signal and the second transmission signal.

公开(公告)号：US11792050B2

公开(公告)日：2023-10-17

申请号：US17537175

申请日：2021-11-29

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Chung Sup Kim ,  Jun Seok Kim ,  Jong Soo Lim ,  Ju Yeon Hong ,  Young Jun Chong

IPC: H04L25/02 ,  H04B17/30 ,  H01Q1/24

CPC classification number: H04L25/0248 ,  H01Q1/242 ,  H04B17/30

Abstract: An operating method of a power estimation apparatus comprising a fixed antenna and a mobile antenna may comprise: a first operation of obtaining N measurement values by receiving a signal from signal sources using the fixed antenna and the mobile antenna that moves at a speed v from a first point to an Nth point; a second operation of generating a two-dimensional (2D) data collection set comprising N×M measurement values, by repeating the first operation M times; applying an approximation singular value decomposition (SVD) algorithm to the 2D data collection set; and obtaining information of the signal sources based on an application result of the approximation SVD algorithm, wherein N and M are natural numbers.

公开(公告)号：US11456809B2

公开(公告)日：2022-09-27

申请号：US16209629

申请日：2018-12-04

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Chung Sup Kim ,  Hyuk Je Kim ,  Young Jun Chong ,  Jong Soo Lim ,  Ju Yeon Hong

IPC: H04B15/00 ,  H04B17/27 ,  H04B17/336 ,  G01S13/46

Abstract: Disclosed is a position estimation method for estimating a position of an interference signal source and a position estimation system for performing the method. The position estimation method may implement an indoor delay-space analysis structure by transmitting and receiving a known signal and a virtual array structure-based direction finding algorithm in an indoor environment in which a plurality of reflected waves is present and may increase an estimation probability for the position of the interference signal source.

公开(公告)号：US11246100B1

公开(公告)日：2022-02-08

申请号：US17110594

申请日：2020-12-03

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Chung Sup Kim ,  Sung Woong Choi ,  Jong Soo Lim ,  Ju Yeon Hong ,  Young Jun Chong

IPC: H04W52/06 ,  H04W52/38 ,  H04W48/16 ,  H04W56/00

Abstract: A method of selecting a path for transmitting a maximum power from a base station to a terminal includes simplifying a plurality of structures in an area by using OBBs, the area being an area in which beam search is to be performed; forming the plurality of simplified structures into a tree structure for ray tracing; performing the ray tracing by applying a ray tracing relation tree reduction (RRTR) algorithm for reducing an amount of computation of a GPU to the tree structure; and applying a linear regression (LR) algorithm for calculating the maximum power to be transmitted from the base station to the terminal based on a result of the ray tracing.

公开(公告)号：US09111714B2

公开(公告)日：2015-08-18

申请号：US14475802

申请日：2014-09-03

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Ju Yeon Hong ,  Young Jun Chong ,  Jeong Hae Lee ,  Dong Jin Kim

IPC: H03B9/08 ,  H01J25/46 ,  H01J23/24

CPC classification number: H01J25/46 ,  H01J23/24 ,  H01J25/40

Abstract: Provided is a backward-wave oscillator in a communication system, including a waveguide formed of a metamaterial. A unit structure of the waveguide may include: a top plate; a short-circuited stub; a bottom plate separated at a predetermined gap from the top plate, and having the short-circuited stub formed in the center thereof; a first metal pillar connecting the top plate at a first port positioned on one surface based on the short-circuited stub to the bottom plate at a second port positioned on the opposite surface of the first port based on the short-circuited stub; and a second metal pillar separated from the first metal pillar, and connecting the top plate at the second port to the bottom plate at the first port.

Abstract translation: 提供了一种通信系统中的反向波振荡器，包括由超材料形成的波导。 波导的单元结构可以包括：顶板; 短路短路 与顶板隔开预定间隙的底板，其中心形成短路短截线; 第一金属支柱，其基于所述短路短截线将位于一个表面上的第一端口连接到位于所述第一端口的相对表面上的第二端口处的所述底板，所述第二端口基于所述短路短截线; 以及与第一金属柱分离的第二金属柱，并且将第二端口处的顶板连接到第一端口处的底板。