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公开(公告)号：US20250141498A1
公开(公告)日：2025-05-01
申请号：US18935149
申请日：2024-11-01
Inventor： Sung woo Choi , Hee Sang Chung , Seon-Ae Kim , Junhyeong Kim
IPC: H04B7/04
Abstract: A beam updating method in a reconfigurable intelligent surface (RIS) is provided. The method includes: receiving data from a base station using a first polarization and receiving an RIS beamforming reference signal using a second polarization; fixing the reflection direction of the first polarization and sequentially changing the reflection direction of the second polarization to transmit reflected waves; and adjusting the direction of the second polarization based on optimal second polarization direction control information determined according to channel power values corresponding to the reflection direction of the second polarization.
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公开(公告)号：US09973326B2
公开(公告)日：2018-05-15
申请号：US14943656
申请日：2015-11-17
Inventor： Kapseok Chang , Seon-Ae Kim , Hyung Sik Ju
IPC: H04L5/14
CPC classification number: H04L5/1461
Abstract: Provided are an apparatus and method for transmitting/receiving a signal. The method for transmitting/receiving a signal includes reducing a quantization error in a baseband (BB) analog area with respect to a reception signal, and performing self-interference cancellation (SIC) on a first output signal output from a BB analog circuit unit in a digital area.
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Patent Agency Ranking
公开(公告)号：US09893871B2
公开(公告)日：2018-02-13
申请号：US14928270
申请日：2015-10-30
Applicant: Electronics and Telecommunications Research Institute , HANDONG GLOBAL UNIVERCITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION
Inventor： Kapseok Chang , Seon-Ae Kim , Hyung Sik Ju , Youngsik Kim
CPC classification number: H04L5/14 , H04B1/0458 , H04B1/123 , H04B1/18 , H04B1/50 , H04B1/525 , H04B15/00
Abstract: Disclosed is an in-band full duplex transceiver. The in-band full duplex transceiver may include a transmitter, a hybrid transformer, and an impedance matching unit. The hybrid transformer may include a first end connected to an antenna, may output a transmitting signal to the antenna, and may output a received signal provided through the antenna to the receiver. The impedance matching unit may include balance networks connected to a second end of the hybrid transformer and matching impedance of the antenna.
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公开(公告)号：US09609681B2
公开(公告)日：2017-03-28
申请号：US14735452
申请日：2015-06-10
Inventor： Soo Chang Kim , Young-Hoon Kim , Seon-Ae Kim , Moon-Sik Lee , Seung Chan Bang
CPC classification number: H04W76/14 , G06K9/00624 , G06K9/00664 , G06K9/22 , G06K9/6212 , G06K9/78 , H04W4/02 , H04W4/80 , H04W8/005
Abstract: If a master device in device-to-device direct communication designates an object type of a target to be communicated with, transmits a target discovery request message including the object type of the target to be communicated with to a plurality of neighboring target devices, and receives a target discovery response message from one or more target devices corresponding to the object type of the target to be communicated with among the plurality of target devices, the master device determines one target device among one or more target devices as the target to be communicated with.
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公开(公告)号：US10038471B2
公开(公告)日：2018-07-31
申请号：US15008005
申请日：2016-01-27
Inventor： Kapseok Chang , Seon-Ae Kim , Hyung Sik Ju
Abstract: There are provided a method and an apparatus for performing a self-interference cancellation by determining a filter coefficient of an analog filter operated in an analog domain; and canceling self-interference generated in a received signal received by the node by a transmitted signal transmitted from the node, based on the filter coefficient.
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公开(公告)号：US09781559B2
公开(公告)日：2017-10-03
申请号：US14805092
申请日：2015-07-21
Inventor： Young-Hoon Kim , Seon-Ae Kim , Soo Chang Kim , Byung-Jae Kwak , Seung Chan Bang
Abstract: A method for a communication link establishing device to establish a communication link in a targeted communication system is provided. A source terminal transmits a source terminal's identification information and threshold value information for selecting a relative angle measurement target to neighboring terminals including a target terminal, and transmits a relative angle measurement request signal to the target terminal and the neighboring terminals. Upon receipt of a response signal for the relative angle measurement request signal from at least one of the neighboring terminals including the target terminal, a communication link with the selected communication target's terminal is established based on the information contained in the response signal.
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7.发明授权Apparatus and method for spatial filtering by estimating angle of deviation for line of sight of user 有权通过估计用户视线的偏差角来进行空间滤波的装置和方法公开(公告)号：US09413441B2
公开(公告)日：2016-08-09
申请号：US14865260
申请日：2015-09-25
Inventor： Seon-Ae Kim , Young-Hoon Kim , Byung-Jae Kwak , Soo Chang Kim , Seung Chan Bang , Moon-Sik Lee
CPC classification number: H04B7/0456 , H04B7/0617 , H04W72/046
Abstract: An apparatus for spatial filtering receives a signal transmitted from a first terminal and detects a synchronization start point in time from a transmission frame included in the signal. The apparatus for spatial filtering demodulates a user-defined sequence included in the transmission frame and the at least one SRJBF sequence when the synchronization start point in time is detected, and then estimates a relative angle based on the demodulated user-defined sequence and SRJBF sequence.
Abstract translation: 用于空间滤波的装置接收从第一终端发送的信号，并且从包括在信号中的发送帧检测到时间上的同步起始点。 当检测到同步起始时间点时，用于空间滤波的装置解调包括在传输帧中的用户定义序列和至少一个SRJBF序列，然后基于解调的用户定义序列和SRJBF序列来估计相对角度 。
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