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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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公开(公告)号：US11431434B2
公开(公告)日：2022-08-30
申请号：US16952470
申请日：2020-11-19
Inventor： Hyung Sik Ju
IPC: H04K3/00
Abstract: A security signal transmission method performed by a first communication node includes estimating a radio channel between the first communication node and a second communication node; classifying all subcarriers into a first subcarrier group for transmitting a data signal and a second subcarrier group for transmitting a jamming signal based on estimated channel information; generating data symbol(s) by allocating the data signal to subcarriers of the first subcarrier group; generating jamming symbol(s) by allocating the jamming signal to subcarriers of the second subcarrier group; generating a first control symbol to which a first control signal is mapped, the first control signal including a first reference value used to restore the data symbols at the second communication node; and transmitting the data symbol(s), the jamming symbol(s), and the first control symbol to the second communication node.
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公开(公告)号：US10432250B2
公开(公告)日：2019-10-01
申请号：US15697592
申请日：2017-09-07
Inventor： Hyung Sik Ju , Dong Hyuk Gwak , Seon Ae Kim , Yu Ro Lee , Hyun Lee
IPC: H04B1/525 , H04B7/0413 , H04L5/16 , H04L5/00
Abstract: An operation method of an in-band full duplex (IFD) multiple-input multiple-output (MIMO) transceiver, including a reception part, a transmission part, an analog self-interference (SI) generator, and a self-interference cancellation (SIC) controller, may comprise generating, at the SIC controller, a control signal for analog SIC and digital SIC and outputting the control signal to the reception part and the analog SI generator; cancelling, at the SIC controller, SI of a transmission signal of the transmission part based on the control signal; and cancelling, at the reception part, SI of a signal of the reception part based on the control signal.
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4.发明授权公开(公告)号：US10177894B2
公开(公告)日：2019-01-08
申请号：US15187927
申请日：2016-06-21
Inventor： Kapseok Chang , Hyung Sik Ju
Abstract: A method and an apparatus for tuning an FIR filter in an in-band full duplex transceiver. The method for tuning an FIR filter may include: setting attenuation of the FIR filter to be a first value and then estimating input information of the FIR filter; estimating a delta response using the estimated input information of the FIR filter; and updating the attenuation of the FIR filter to a second value using the estimated delta response.
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5.发明授权公开(公告)号：US10177805B2
公开(公告)日：2019-01-08
申请号：US15188597
申请日：2016-06-21
Inventor： Kapseok Chang , Hyung Sik Ju
Abstract: A method and an apparatus for tuning an FIR filter in an in-band full duplex transceiver. The method for tuning an FIR filter includes: converting an input signal of the FIR filter into a first signal that is a baseband signal; converting a signal obtained by subtracting an output signal of the FIR filter from the self-transmitted interference signal into a second signal that is the baseband signal; and calculating attenuation of the FIR filter using the first signal and the second signal.
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Patent Agency Ranking
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：US12028893B2
公开(公告)日：2024-07-02
申请号：US17562932
申请日：2021-12-27
Inventor： Hyung Sik Ju , Dong Hyuk Gwak , Seon Ae Kim , Yu Ro Lee
IPC: H04W72/12 , H04L5/00 , H04L5/14 , H04W72/04 , H04W72/044 , H04W72/121 , H04W72/23 , H04W72/51 , H04W72/566 , H04W72/54
CPC classification number: H04W72/569 , H04L5/0037 , H04L5/0044 , H04L5/0069 , H04L5/14 , H04W72/044 , H04W72/121 , H04W72/23 , H04W72/51 , H04W72/54
Abstract: An operation method of a base station in an IFD scheme may comprise receiving position information of each of a plurality of downlink (DL) terminals and a plurality of uplink (UL) terminals; determining a guard zone corresponding to each of the plurality of DL terminals based on the position information of each of the plurality of DL terminals; determining whether at least one UL terminal is located in the guard zone based on the position information of each of the plurality of UL terminals; determining a scheduling priority of each of the plurality of DL terminals according to whether at least one UL terminal is located in the guard zone; generating DL control information including frequency-time resource allocation information and interference control information based on the determined scheduling priority; and transmitting data signals and the DL control information to the plurality of DL terminals.
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公开(公告)号：US11546124B2
公开(公告)日：2023-01-03
申请号：US17064994
申请日：2020-10-07
Inventor： Jae Seung Lee , Moon Sik Lee , Jae Woo Park , Jee Yon Choi , Young Hoon Kim , Ju Ho Park , Hoo Sung Lee , Young Il Jeon , Chan Bok Jeong , Hyung Sik Ju , Ik Jae Chun , Il Gyu Kim
Abstract: Disclosed are a method and an apparatus for communication using fronthaul interfaces. An operation method of a first communication node includes transmitting a section type 8 message #1 including numerology-related information #1; transmitting a section type 9 message #1 including channel information of each of one or more second communication nodes indicated by the section type 8 message #1 and the numerology related information #1, transmitting a section type 8 message #2 including numerology-related information #2 other than the numerology-related information #1; and transmitting a section type 9 message #2 including channel information of each of one or more third communication nodes indicated by the section type 8 message #2 and the numerology-related information #2.
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9.发明授权公开(公告)号：US10931395B2
公开(公告)日：2021-02-23
申请号：US16564369
申请日：2019-09-09
Inventor： Hyung Sik Ju
Abstract: An operation method of a terminal in a wireless communication system includes receiving a preamble sequence from a base station; estimating a UL channel between the terminal and the base station based on the preamble sequence; determining a first frequency region for transmitting a data signal and a second frequency region for transmitting a jamming signal in an entire frequency region of the UL channel based on a result of estimating the UL channel; and transmitting to the base station a UL control signal including identification information for identifying the first frequency region and the second frequency region.
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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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