公开(公告)号：US20240333574A1

公开(公告)日：2024-10-03

申请号：US18444130

申请日：2024-02-16

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Kwanwoong RYU ,  Chung Sup Kim ,  Hyuk Je Kim ,  Sung Woong Choi ,  Kwonhue Choi ,  Hyung-seop Son

IPC: H04L27/26

CPC classification number: H04L27/265 ,  H04L27/2607 ,  H04L27/2628

Abstract: Provided are a signal transmission method and signal reception method of heterogeneous systems sharing a frequency band. The signal transmission method performed by a transmitter of a target communication system sharing a frequency band of a general communication system in an underlay form includes mapping information symbols to be transmitted to a delay-Doppler (DD) domain and determining an information symbol mapping matrix, applying an inverse symplectic finite Fourier transform (ISFFT) to the information symbol mapping matrix and transforming the information symbol mapping matrix into a frequency-time (FT) matrix, and applying a Heisenberg transform to the FT matrix and generating a transmission signal of a time domain.

公开(公告)号：US09377494B2

公开(公告)日：2016-06-28

申请号：US13727016

申请日：2012-12-26

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sung Woong Choi ,  Hyo Joon Eom ,  Sang Bong Jeon ,  Seung Keun Park ,  Jun Cheol Park

IPC: G01R29/10 ,  G01R29/08

CPC classification number: G01R29/0814 ,  G01R29/0821

Abstract: Disclosed are an apparatus and a method for analyzing a distribution of electromagnetic waves using a 4-port transverse electromagnetic (TEM) cell in a radio wave system. The apparatus for analyzing a distribution of electromagnetic waves in a radio wave system includes: an input unit configured to apply a reference electrostatic potential to an inside of a 4-port transverse electromagnetic (TEM) cell in which electronic devices are located; a calculation unit configured to calculate electrostatic potentials inside the 4-port TEM cell using a mode matching scheme; an analysis unit configured to analyze the distribution of electromagnetic waves inside the 4-port TEM cell through the electrostatic potentials inside the 4-port TEM cell; and an output unit configured to output the distribution of electromagnetic waves inside the 4-port TEM cell.

Abstract translation: 公开了一种利用无线电波系统中的4端口横向电磁（TEM）单元分析电磁波分布的装置和方法。 用于分析无线电波系统中的电磁波分布的装置包括：输入单元，被配置为将参考静电电位施加到电子设备所在的4端口横向电磁（TEM）单元的内部; 计算单元，被配置为使用模式匹配方案来计算所述4端口TEM单元内的静电电位; 分析单元，被配置为通过所述4端口TEM单元内的静电电位来分析所述4端口TEM单元内部的电磁波的分布; 以及输出单元，其被配置为输出所述4端口TEM单元内的电磁波分布。

公开(公告)号：US08816304B1

公开(公告)日：2014-08-26

申请号：US13948621

申请日：2013-07-23

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sung Woong Choi ,  Seung Keun Park

IPC: H01J25/34 ,  G01N29/34

CPC classification number: H01J25/34

Abstract: A standard EM wave field generator, includes a first tapered region configured to have a first port formed on its one side and be supplied with a source to generate EM field through the first port; and a first untapered region configured to have at least one or more slits in the form of a hole. Further, the standard EM wave field generator includes a second tapered region configured to have a third port formed on its one side and output the EM field generated from the first port through the third port.

Abstract translation: 一种标准EM波场发生器，包括：第一锥形区域，被配置为具有形成在其一侧的第一端口，并且被提供有源以通过第一端口产生EM场; 以及构造成具有孔形式的至少一个或多个狭缝的第一未缝合区域。 此外，标准EM波场发生器包括第二锥形区域，其被配置为具有在其一侧上形成的第三端口，并且通过第三端口输出从第一端口产生的EM场。

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.