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公开(公告)号：US11796631B2
公开(公告)日：2023-10-24
申请号：US16924739
申请日：2020-07-09
发明人： Byung Jang Jeong , Woo Jin Byun
摘要： A method of transmitting and receiving an orthogonal frequency division multiplexing (OFDM) signal for radio detection and ranging (radar) applications, and apparatuses performing the method are disclosed. The method includes receiving an OFDM signal in which a cyclic prefix (CP) is not included and converting the received OFDM signal to a received discrete time-domain signal through an analog-to-digital converter (ADC), selecting sub-carrier symbols to be input to a fast Fourier transform (FFT) from among all sub-carrier symbols included in the received discrete time-domain signal by performing windowing on the received discrete time-domain signal by a window that is based on an estimated value of a maximum delay that occurs potentially in a channel, converting the received discrete time-domain signal to a received frequency-domain signal by inputting the selected sub-carrier symbols to the FFT, and performing channel estimation based on the received frequency-domain signal.
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公开(公告)号：US10056700B2
公开(公告)日：2018-08-21
申请号：US14724320
申请日：2015-05-28
申请人： Electronics and Telecommunications Research Institute , INDUSTRY-ACADEMIC COOPERATION FOUNDATION, CHOSUN UNIVERSITY
发明人： Kwang Seon Kim , Sun Soo Oh , Woo Jin Byun , Min Soo Kang , Bong Su Kim
CPC分类号： H01Q21/065
摘要： Disclosed is a circular array antenna. The circular array antenna includes: an input/output unit receiving electromagnetic waves from a transmitter and distributing the received electromagnetic waves to the antenna; a primary feeder connected with the input/output unit and placed at the center of the circular array antenna; a plurality of secondary feeders radially connected to the primary feeder; a plurality of patch units connected to the respective secondary feeders to generate an electric field radially; and a plurality of length controllers formed at terminals of the respective secondary feeders in a direction to extend the lengths of the respective secondary feeders, of which the lengths are controllable.
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公开(公告)号：US20160191177A1
公开(公告)日：2016-06-30
申请号：US14976496
申请日：2015-12-21
发明人： Kwang Seon Kim , Min Soo Kang , Bong Su Kim , Jung Bin Kim , Woo Jin Byun , Mi Kyung Suk
摘要： Provided is an apparatus for calibrating a transmission path, the apparatus including one or more couplers to separate, by one or more paths, one or more input signals input from an input terminal of one or more antennas, a power detector to detect amplitude of one or more path signals separated by the one or more paths, a power distributor to distribute any one of the one or more path signals, one or more mixers to mix a distribution signal distributed by the power distributor with the one or more path signals, a low-pass filter to remove a high-frequency component of a mixed signal mixed by the one or more mixers; and a voltage detector to detect amplitude of one or more filter pass signals with the high-frequency component removed.
摘要翻译： 提供了一种用于校准传输路径的装置，该装置包括一个或多个耦合器，以通过一个或多个路径分离从一个或多个天线的输入端子输入的一个或多个输入信号，功率检测器，用于检测一个或多个天线的幅度 或更多路径信号，一个或多个路径分离的路径信号;功率分配器，用于分配所述一个或多个路径信号中的任何一个，一个或多个混频器，以将由所述分配器分配的分配信号与所述一个或多个路径信号混合; 低通滤波器，以去除由一个或多个混频器混合的混合信号的高频分量; 以及电压检测器，用于检测去除了高频分量的一个或多个滤波器通过信号的幅度。
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公开(公告)号：US09106495B2
公开(公告)日：2015-08-11
申请号：US14547243
申请日：2014-11-19
发明人： Kwang Seon Kim , Min Soo Kang , Bong Su Kim , Woo Jin Byun , Jong Soo Lim , Myung Sun Song , Jae Ick Choi
CPC分类号： H04L25/0204 , H04B7/0413 , H04B7/0604 , H04L1/0002 , H04L1/0011 , H04L1/06 , H04L5/0023 , H04L25/00 , H04L27/0008 , H04L27/34
摘要： Disclosed are a wireless communication method of improving frequency efficiency based on a channel function in a wireless communication system and an apparatus thereof. The wireless communication system using a digital modulation scheme, includes: a transmitting apparatus which modulates a data signal to generate a modulation symbol, generates a channel symbol function corresponding to the modulation symbol, combines the modulation symbol with the channel symbol function to generate a transmission symbol to transmit the generated transmission symbol through a transmission antenna; and a receiving apparatus which receives the transmission symbol through a reception antenna, estimates a channel symbol function included in the transmission symbol, and extracts the data signal based on the modulation symbol included in the transmission symbol.
摘要翻译： 公开了一种基于无线通信系统中的信道功能提高频率效率的无线通信方法及其装置。 使用数字调制方式的无线通信系统包括：调制数据信号以生成调制符号的发送装置，生成与调制符号对应的信道符号功能，将调制符号与信道符号功能组合，生成发送 符号，用于通过发送天线发送生成的发送符号; 以及通过接收天线接收发送符号的接收装置，估计包含在发送符号中的信道符号函数，并且根据包含在发送符号中的调制符号提取数据信号。
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公开(公告)号：US11567184B2
公开(公告)日：2023-01-31
申请号：US16550086
申请日：2019-08-23
申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE , PUKYONG NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION
发明人： Sung Hyun Hwang , Woo Jin Byun , Sung Jin Yoo , Jae Hyun Park
IPC分类号： G01S13/58 , G01S13/93 , G01S7/35 , G01S13/931
摘要： An operation method performed by an apparatus for detecting multiple targets may comprise transmitting first signals using Mt transmit antennas included in the apparatus; receiving the first signals reflected by the multiple targets through Mr receive antennas included in the apparatus; generating a first function for estimating a velocity and an azimuth of each of the multiple targets using the first signals and the reflected first signals; estimating a velocity and an azimuth that maximize a result of the first function as a velocity and an azimuth of a first target closest to the apparatus among the multiple targets; generating a second function by cancelling interference caused by the first target from the first function; and estimating a velocity and an azimuth that maximize a result of the second function as a velocity and an azimuth of a second target among the multiple targets.
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公开(公告)号：US10911136B2
公开(公告)日：2021-02-02
申请号：US16203394
申请日：2018-11-28
申请人： Electronics and Telecommunications Research Institute , FOUNDATION FOR RESEARCH AND BUSINESS, SEOUL NATIONAL UNIVERSITY OF SCIENCE AND TECHNOLOGY
发明人： Byung Jang Jeong , Woo Jin Byun , Ji-Hoon Yun , Jae-Han Lim , Wisnu Murti
IPC分类号： H04B7/22 , H04B7/0456 , H04L1/00 , H04B1/00 , H04B7/08
摘要： Disclosed are a communication method and communication apparatus using an ambient backscatter communication. A transmission apparatus may include generating a plurality of bitsets by fragmenting data based on a predetermined bitset length, mapping the plurality of bitsets to a plurality of switching patterns based on a data size, and controlling a reflection of a background radio frequency (RF) signal based on a corresponding mapped switching pattern, a total number of the plurality of switching patterns may be determined based on the bitset length, and each of the plurality of switching patterns may have a different length.
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公开(公告)号：US20190089470A1
公开(公告)日：2019-03-21
申请号：US15825913
申请日：2017-11-29
发明人： Chung Sup KIM , Hyuk Je KIM , Young Jun CHONG , Jong Soo LIM , Woo Jin Byun
CPC分类号： H04B15/00 , H01Q1/007 , H01Q1/125 , H01Q3/34 , H01Q21/08 , H01Q21/20 , H04B1/1009 , H04W4/029 , H04W64/003
摘要： 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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公开(公告)号：US09960796B2
公开(公告)日：2018-05-01
申请号：US15188045
申请日：2016-06-21
发明人： Bong Su Kim , Min Soo Kang , Kwang Seon Kim , Woo Jin Byun , Myung Sun Song
IPC分类号： H04B1/707 , H04B1/10 , H04B1/18 , H04B7/0452 , H04B7/08
CPC分类号： H04B1/10 , H04B1/18 , H04B7/0413 , H04B7/0452 , H04B7/08 , H04B7/0848
摘要： Provided are a multi-input multi-output system which overcomes a disadvantage that optimal receiving performance cannot be maintained according to an installation environment and a performance change of a receiver when a receiving module is configured by using a fixed attenuator and a fixed phase in a line-of-sight multi-input multi-output system configuration and analogously controls an interference removing module of a receiver including a variable attenuator and a phase shifter which are controllable to enhance a receiving performance and increase frequency efficiency, in order to maximize a signal-to-interference ratio of each path and an operating method thereof.
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19.发明授权公开(公告)号：US09853362B2
公开(公告)日：2017-12-26
申请号：US14723657
申请日：2015-05-28
发明人： Bong Su Kim , Min Soo Kang , Kwang Seon Kim , Woo Jin Byun , Mi Kyung Suk
CPC分类号： H01Q21/061 , H01Q3/26
摘要： The present invention provides an array antenna apparatus for a rotation mode, a wireless communication terminal, and a method thereof. The apparatus according to the exemplary embodiment includes an antenna array including a plurality of antenna elements; and a control unit which determines an antenna pattern in accordance with a transmission/reception characteristic of a signal and assigns a weight to antenna elements in a position corresponding to the determined antenna pattern on the antenna array to implement a rotation mode antenna based on the antenna element to which the weight is assigned.
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20.发明授权公开(公告)号：US09831936B2
公开(公告)日：2017-11-28
申请号：US15092700
申请日：2016-04-07
发明人： Jung-Bin Kim , Woo Jin Byun
IPC分类号： H04W40/00 , H04B7/155 , H04L5/00 , H04B1/7107 , H04J11/00 , H04W72/12 , H04W84/04 , H04W72/00
CPC分类号： H04B7/15514 , H04B1/7107 , H04J11/00 , H04J11/004 , H04L5/0001 , H04L5/0035 , H04W72/00 , H04W72/12 , H04W84/047
摘要： Disclosed is a method for applying non-orthogonal multiple access in a multi-hop relay system constituted by a base station, a relay, a first user terminal, and a second user terminal, including: receiving, by the first user terminal, a first data signal which the first user terminal needs to receive and a second data signal which the second user terminal needs to receive from the base station through a first phase; receiving, by the first user terminal, a third data signal from the base station through a second phase when the second data signal is relayed through the second phase by the relay; and removing an interference signal included in the third data signal received through the second phase by using the second data signal which the first user terminal receives through the first phase.
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