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公开(公告)号：US10992038B2
公开(公告)日：2021-04-27
申请号：US16703154
申请日：2019-12-04
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.
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公开(公告)号：US11792050B2
公开(公告)日：2023-10-17
申请号：US17537175
申请日：2021-11-29
Inventor： Chung Sup Kim , Jun Seok Kim , Jong Soo Lim , Ju Yeon Hong , Young Jun Chong
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.
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公开(公告)号：US10067908B2
公开(公告)日：2018-09-04
申请号：US15595094
申请日：2017-05-15
Inventor： Chung Sup Kim , Kanghee Kim , Sang-Won Kim , Ki Cheol Tae , Heung Yong Kang , Yong-Seok Choi
Abstract: An apparatus for calculating a reception time of a wireless communication signal is disclosed. The apparatus includes a downconverted signal generator configured to generate a downconverted signal, a baseband signal, by downconverting a frequency of a signal received from a transmission source, a modulated signal generator configured to generate a modulated signal by multiplying the downconverted signal by a randomly generated reference signal, a time difference calculator configured to calculate a time difference between the modulated signal and the reference signal by cross-correlating the modulated signal and the reference signal, and a reception time calculator configured to calculate a reception time of the signal received from the transmission source using a point in time at which the reference signal is generated and the time difference between the modulated signal and the reference signal.
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公开(公告)号：US10419133B2
公开(公告)日：2019-09-17
申请号：US15825913
申请日：2017-11-29
Inventor： Chung Sup Kim , Hyuk Je Kim , Young Jun Chong , Jong Soo Lim , Woo Jin Byun
IPC: H04B15/00 , H04W64/00 , H04W4/02 , H01Q3/34 , H01Q1/00 , H01Q21/20 , H01Q1/08 , H01Q1/12 , H04W4/029 , H01Q21/08
Abstract: Disclosed is a method of estimating a position of a signal source and a position estimation apparatus, the method including acquiring an environment, a frequency, and a bandwidth of the interference signal source, determining an arrangement form of the two antennas based on the environment, the frequency, and the bandwidth and arranging the two antennas, and estimating a position of the interference signal source based on an interference signal of the interference signal source and the two arranged antennas, wherein the environment includes an indoor environment and an outdoor environment.
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5.发明授权Method and apparatus for designing frequency-spatial filter with variable bandwidth 有权用于设计具有可变带宽的频率 - 空间滤波器的方法和装置公开(公告)号：US09571316B2
公开(公告)日：2017-02-14
申请号：US15007755
申请日：2016-01-27
Inventor： Chung Sup Kim , Kang Hee Kim , Ki Cheol Tae , Sang Won Kim , Heung Yong Kang , Yong Seok Choi
IPC: H04L27/148
CPC classification number: H04L27/148 , H04L27/265
Abstract: Provided herein is a method and apparatus for realizing a frequency-spatial filter with variable bandwidth, the method including generating M number of FFT channel blocks having N number of channels by performing an N point FFT (Fast Fourier Transform) processing using M number of array antenna inputs; combining some of the N number of channels of each FFT channel block according to a frequency bandwidth variable parameter value; combining some of spatial response vector channels in a combined channel of each FFT channel block according to a spatial bandwidth variable parameter value; and combining all the channels and outputting the same.
Abstract translation: 本文提供了一种用于实现具有可变带宽的频率 - 空间滤波器的方法和装置，该方法包括通过使用M个数组阵列执行N点FFT（快速傅里叶变换）处理来产生具有N个信道数的M个FFT信道块 天线输入; 根据频率带宽可变参数值组合每个FFT通道块的N个通道中的一些; 根据空间带宽可变参数值，在每个FFT通道块的组合通道中组合一些空间响应矢量通道; 并组合所有通道并输出相同的通道。
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Patent Agency Ranking
6.发明公开公开(公告)号：US20240333574A1
公开(公告)日：2024-10-03
申请号：US18444130
申请日：2024-02-16
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.
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公开(公告)号：US09739866B2
公开(公告)日：2017-08-22
申请号：US14068727
申请日：2013-10-31
Inventor： Kanghee Kim , Ki Cheol Tae , Chung Sup Kim
CPC classification number: G01S3/14
Abstract: An apparatus for radio direction finding, the apparatus comprising: a receiver configured to receive target signals to be subjected to the direction finding of signal sources, which are acquired by an antenna array; a channel profiler configured to produce profiles of the target signals received through the receiver; a pre-analyzer configured to preemptively process in a narrowband the wideband target signals based on the profiles that are produced by the channel profiler to produce pre-analyzed information for the wideband target signals; and a direction finder configured to perform the direction finding on the signal sources using the pre-analyzed information and the profilers of the target signals.
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8.发明授权公开(公告)号：US09071497B2
公开(公告)日：2015-06-30
申请号：US13834443
申请日：2013-03-15
Inventor： Chung Sup Kim , Ki Cheol Tae , Kanghee Kim , Heung Yong Kang , Soo-Ho Sohn , Yong-Seok Choi , Jae Ick Choi
CPC classification number: H04L27/38 , H04L27/0012 , H04L27/10 , H04L27/18
Abstract: An apparatus is used for modulation classification of unknown input signal in a wireless communication system. The apparatus includes a signal classification unit configured to classify the input signal into a PSK signal and an FSK signal and a modulation index decision unit configured to decide a modulation index for the PSK signal and the FSK signal classified by the signal classification unit.
Abstract translation: 一种装置用于无线通信系统中未知输入信号的调制分类。 该装置包括：信号分类单元，被配置为将输入信号分类为PSK信号;以及调制指数决定单元，被配置为决定由信号分类单元分类的PSK信号和FSK信号的调制指数。
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公开(公告)号：US11456809B2
公开(公告)日：2022-09-27
申请号：US16209629
申请日：2018-12-04
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.
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公开(公告)号：US11246100B1
公开(公告)日：2022-02-08
申请号：US17110594
申请日：2020-12-03
Inventor： Chung Sup Kim , Sung Woong Choi , Jong Soo Lim , Ju Yeon Hong , Young Jun Chong
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.
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