Patents by Inventor Myung-Sun Baek

Myung-Sun Baek has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210110238
    Abstract: Disclosed herein are an apparatus and method for detecting a broadcast signal. The apparatus includes a bootstrap detection unit for detecting whether a bootstrap signal is included in a received broadcast signal based on a preset first bootstrap window and a machine-learning method, a bootstrap offset estimation unit for searching the broadcast signal for the start point of the bootstrap signal using a preset second bootstrap window, estimating a bootstrap offset based on the machine-learning method, and estimating bootstrap symbols from the bootstrap offset, and a demodulation unit for demodulating information included in the broadcast signal from the bootstrap symbols based on the machine-learning method.
    Type: Application
    Filed: May 8, 2020
    Publication date: April 15, 2021
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Myung-Sun BAEK, Jin-Hyuk SONG, Byung-Jun BAE, Dong-Joon CHOI
  • Patent number: 10897277
    Abstract: Disclosed herein are a method for estimating a self-interference signal based on iterative estimation and an apparatus for the same. The method is configured to transmit two preamble signals from the transmission antenna of one terminal to the reception antenna thereof, to estimate third-order nonlinear distortion, which distorts a self-interference signal, based on a transmission signal and a reception signal for each of the two preamble signals, to update the reception signal by eliminating the third-order nonlinear distortion therefrom, to re-estimate the third-order nonlinear distortion based on the updated reception signal, and to estimate the self-interference signal based on the final third-order nonlinear distortion, which is acquired by repeatedly re-estimating the third-order nonlinear distortion as many times as a preset number of iterations.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: January 19, 2021
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Myung-Sun Baek, Joon-Young Jung, Heung-Mook Kim
  • Patent number: 10892797
    Abstract: An apparatus and a method for processing an uplink signal of cable broadcasting network including: modulating uplink data to be transmitted to a broadcasting station which is located at an end of the cable broadcasting network into a plurality of symbols; performing a correlation-coding on the plurality of symbols; and outputting an analog radio frequency (RF) signal corresponding to the plurality of correlation-coded symbols are provided.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: January 12, 2021
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Myung-Sun Baek, Jin Hyuk Song, Joon Young Jung, Heung Mook Kim, Eun Hee Hyun
  • Publication number: 20200322121
    Abstract: A method and an apparatus for estimating synchronization of a broadcast signal in a time domain using a synchronization estimation signal through steps of: performing a correlation operation using a correlation window on a plurality of synchronization estimation signals separated to a plurality of paths and outputting a plurality of correlated signals; delaying the plurality of correlated signals to output a plurality of delayed signals; and estimating the synchronization using the plurality of delayed signals are provided.
    Type: Application
    Filed: April 3, 2020
    Publication date: October 8, 2020
    Inventors: Myung-Sun BAEK, Sang-Jung RA, Byungjun BAE, Yong Seong CHO, Hyoung Kyu SONG, Won-Seok LEE
  • Publication number: 20200220573
    Abstract: An apparatus and a method for processing an uplink signal of cable broadcasting network including: modulating uplink data to be transmitted to a broadcasting station which is located at an end of the cable broadcasting network into a plurality of symbols; performing a correlation-coding on the plurality of symbols; and outputting an analog radio frequency (RF) signal corresponding to the plurality of correlation-coded symbols are provided.
    Type: Application
    Filed: January 8, 2020
    Publication date: July 9, 2020
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Myung-Sun BAEK, Jin Hyuk SONG, Joon Young JUNG, Heung Mook KIM, Eun Hee HYUN
  • Publication number: 20200213072
    Abstract: Disclosed are a method and a device for transmitting and receiving a signal, the method including: identifying a downlink signal-only transmission section in which a first electronic device transmits a downlink signal to a second electronic device, and transmitting the signal in the downlink signal-only transmission section; detecting at least one symbol that has a power value relatively higher than a predetermined threshold value; estimating, on the basis of the detected at least one symbol, an interference channel in which a self-interference signal occurs; detecting the self-interference signal; and identifying an FDX transmission section in which an uplink signal is received from the second electronic device and the downlink signal is transmitted simultaneously, and processing transmission of the downlink signal and reception of the uplink signal in the FDX transmission section, wherein the reception of the uplink signal is processed by removing the self-interference signal occurring in the interference c
    Type: Application
    Filed: December 26, 2019
    Publication date: July 2, 2020
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Myung Sun BAEK, Jin Hyuk SONG, Joon Young JUNG, Heung Mook KIM, Yong Seong CHO
  • Publication number: 20200059306
    Abstract: Disclosed herein are a signal-multiplexing apparatus and method based on machine learning. The signal-multiplexing method based on machine learning, performed by a signal-multiplexing apparatus based on machine learning, including training a transmitted signal using a machine-learning technique, performing complex mapping to transmit the transmitted signal as multiple signals, receiving the multiple signals and regularizing the multiple signals based on a preset rule corresponding to the machine-learning technique, outputting an estimated value for the transmitted signal by training regularized multiple signals using the machine-learning technique, calculating a difference between the transmitted signal and the estimated value for the transmitted signal, and detecting the transmitted signal from an output value when the difference is less than or equal to a preset value.
    Type: Application
    Filed: August 12, 2019
    Publication date: February 20, 2020
    Inventors: Myung-Sun BAEK, Joon-Young JUNG, Dong-Joon CHOI, Heung-Mook KIM
  • Patent number: 10498560
    Abstract: Disclosed herein are an apparatus and method for providing FTN communication using transmit diversity. A transmission apparatus generates a signal to be output through diversity modulation. A diversity order of diversity modulation may be set based on an FTN parameter, such as a variable for adjusting sampling time or a symbol transmission speed. When the diversity order is set based on the FTN parameter, the FTN parameter and the diversity order may be set so as to satisfy a QoS required of the transmission apparatus, such as a transmission rate and a Bit Error Rate. Depending on the circumstances, the set FTN parameter and diversity order may be provided to a reception apparatus that is to receive the output signal.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: December 3, 2019
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Myung-Sun Baek, Joung-Il Yun, Sang-Woon Kwak, Hae-Chan Kwon, Young-Su Kim, Hyoung-Soo Lim, Nam-Ho Hur
  • Patent number: 10461970
    Abstract: A transmitter/receiver for supporting FTN (Faster-than-Nyquist) signaling and a method for the same may be provided. The transmitter for supporting FTN signaling) according to an embodiment of the present disclosure includes a frame input unit providing an input frame obtained by composing a transmission signal in units of a frame; a sequence frame determination unit generating a plurality of scramble sequences, generating a plurality of sequence frames by applying the plurality of scramble sequences to the input frame, and determining at least one sequence frame from the plurality of sequence frames considering a PAPR value of the plurality of sequence frames; and a signal transmission unit for transmitting the sequence frame determined.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: October 29, 2019
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Myung Sun Baek, Young Su Kim, Nam Ho Hur, Hyoung Soo Lim, Heung Mook Kim
  • Publication number: 20190181897
    Abstract: Disclosed herein are a method for estimating a self-interference signal based on iterative estimation and an apparatus for the same. The method is configured to transmit two preamble signals from the transmission antenna of one terminal to the reception antenna thereof, to estimate third-order nonlinear distortion, which distorts a self-interference signal, based on a transmission signal and a reception signal for each of the two preamble signals, to update the reception signal by eliminating the third-order nonlinear distortion therefrom, to re-estimate the third-order nonlinear distortion based on the updated reception signal, and to estimate the self-interference signal based on the final third-order nonlinear distortion, which is acquired by repeatedly re-estimating the third-order nonlinear distortion as many times as a preset number of iterations.
    Type: Application
    Filed: October 5, 2018
    Publication date: June 13, 2019
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Myung-Sun BAEK, Joon-Young JUNG, Heung-Mook KIM
  • Publication number: 20190173709
    Abstract: Disclosed herein are an apparatus and method for reducing signal distortion. The apparatus for reducing signal distortion includes a signal input unit for receiving Orthogonal Frequency Division Multiplexing (OFDM) signals, a symbol selection unit for selecting an OFDM symbol having a lowest Peak-to-Average-Power-Ratio (PAPR) by applying selective mapping (SLM) to the OFDM signals, an information generation unit for generating side information that includes information about a phase-shift sequence of the selected OFDM symbol, and a signal output unit for outputting a resulting signal by adding the side information to the selected OFDM symbol.
    Type: Application
    Filed: June 26, 2018
    Publication date: June 6, 2019
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Myung-Sun BAEK, Jin-Hyuk SONG, Joon-Young JUNG, Heung-Mook KIM
  • Patent number: 10218462
    Abstract: Disclosed is an apparatus and method for supporting cooperative transmission, the apparatus including a controller configured to determine detection bits with respect to a plurality of relay terminals based on channel states between a source terminal and the plurality of relay terminals, the relay terminals configured to detect sub-data corresponding to the detection bits from data when the data is transmitted from the source terminal, an interface configured to receive the sub-data from the relay terminals, respectively, in response to the relay terminals detecting the sub-data, and a restorer configured to restore the data by combining the received sub-data.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: February 26, 2019
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Myung Sun Baek, Sang Woon Kwak, Young Su Kim, Joung Il Yun, Hyoung Soo Lim, Nam Ho Hur
  • Publication number: 20190013972
    Abstract: Disclosed herein are an apparatus and method for providing FTN communication using transmit diversity. A transmission apparatus generates a signal to be output through diversity modulation. A diversity order of diversity modulation may be set based on an FTN parameter, such as a variable for adjusting sampling time or a symbol transmission speed. When the diversity order is set based on the FTN parameter, the FTN parameter and the diversity order may be set so as to satisfy a QoS required of the transmission apparatus, such as a transmission rate and a Bit Error Rate. Depending on the circumstances, the set FTN parameter and diversity order may be provided to a reception apparatus that is to receive the output signal.
    Type: Application
    Filed: February 22, 2018
    Publication date: January 10, 2019
    Inventors: Myung-Sun BAEK, Joung-Il YUN, Sang-Woon KWAK, Hae-Chan KWON, Young-Su KIM, Hyoung-Soo LIM, Nam-Ho HUR
  • Publication number: 20180351771
    Abstract: A transmitter/receiver for supporting FTN(Faster-than-Nyquist) signaling and a method for the same may be provided. The transmitter for supporting FTN signaling) according to an embodiment of the present disclosure includes a frame input unit providing an input frame obtained by composing a transmission signal in units of a frame; a sequence frame determination unit generating a plurality of scramble sequences, generating a plurality of sequence frames by applying the plurality of scramble sequences to the input frame, and determining at least one sequence frame from the plurality of sequence frames considering a PAPR value of the plurality of sequence frames; and a signal transmission unit for transmitting the sequence frame determined.
    Type: Application
    Filed: February 2, 2018
    Publication date: December 6, 2018
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Myung Sun BAEK, Young Su KIM, Nam Ho HUR, Hyoung Soo LIM, Heung Mook KIM
  • Patent number: 10142140
    Abstract: Disclosed herein are an apparatus and method for receiving a signal based on FTN. The apparatus for receiving a signal based on FTN includes an equalizer for creating a Log Likelihood Ratio (LLR) sequence by equalizing an FTN signal sequence sampled at an FTN signaling rate; a deinterleaver for deinterleaving the created LLR sequence; a decoder for decoding the LLR sequence by correcting errors in the deinterleaved LLR sequence; an interleaver for interleaving the decoded LLR sequence and providing the interleaved LLR sequence to the equalizer; and an FTN interference estimation unit for providing the FTN signal sequence, from which an FTN interference sequence is eliminated, to the equalizer, using the interleaved LLR sequence.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: November 27, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Joung-Il Yun, Sang-Woon Kwak, Myung-Sun Baek, Hae-Chan Kwon, Hyoung-Soo Lim, Nam-Ho Hur, Nam-Shik Kim, Bi-Woong Chung
  • Patent number: 10129051
    Abstract: Disclosed herein are a method and apparatus for iterative interference cancellation and channel estimation in a system based on FTN communication including a pilot. Interference of a pilot symbol on a data symbol is estimated, and the estimated interference is eliminated from a sequence of data symbols. When demodulation and channel decoding are performed on the sequence of data symbols, interference between data symbols and interference of a data symbol on a pilot symbol are estimated. Such estimation is repeatedly performed, and as FTN interference is repeatedly estimated and eliminated, channel estimation performance is improved, and through the improved channel estimation performance, the reception performance of the entire system is improved.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: November 13, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sang-Woon Kwak, Joung-Il Yun, Myung-Sun Baek, Hae-Chan Kwon, Young-Su Kim, Hyoung-Soo Lim, Nam-Ho Hur
  • Publication number: 20180205578
    Abstract: Disclosed herein are a method and apparatus for iterative interference cancellation and channel estimation in a system based on FTN communication including a pilot. Interference of a pilot symbol on a data symbol is estimated, and the estimated interference is eliminated from a sequence of data symbols. When demodulation and channel decoding are performed on the sequence of data symbols, interference between data symbols and interference of a data symbol on a pilot symbol are estimated. Such estimation is repeatedly performed, and as FTN interference is repeatedly estimated and eliminated, channel estimation performance is improved, and through the improved channel estimation performance, the reception performance of the entire system is improved.
    Type: Application
    Filed: July 25, 2017
    Publication date: July 19, 2018
    Inventors: Sang-Woon KWAK, Joung-Il YUN, Myung-Sun BAEK, Hae-Chan KWON, Young-Su KIM, Hyoung-Soo LIM, Nam-Ho HUR
  • Patent number: 9893918
    Abstract: A Faster-Than-Nyquist (FTN)-based transmitting apparatus segments an input data bit string into a plurality of partial bit strings, simultaneously channel-encodes each of the plurality of partial bit strings, simultaneously modulates each of the plurality of channel encoded bit strings to generate a plurality of modulation symbol sequences, and then pulse-shapes and transmits the plurality of modulation symbol sequences at a speed faster than a Nyquist rate.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: February 13, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Joungil Yun, Sangwoon Kwak, Hyoungsoo Lim, Young Su Kim, Myung-Sun Baek, Yun Jeong Song, Namho Hur, Wangrok Oh, Donghoon Kang
  • Publication number: 20180034591
    Abstract: Disclosed herein are an apparatus and method for receiving a signal based on FTN. The apparatus for receiving a signal based on FTN includes an equalizer for creating a Log Likelihood Ratio (LLR) sequence by equalizing an FTN signal sequence sampled at an FTN signaling rate; a deinterleaver for deinterleaving the created LLR sequence; a decoder for decoding the LLR sequence by correcting errors in the deinterleaved LLR sequence; an interleaver for interleaving the decoded LLR sequence and providing the interleaved LLR sequence to the equalizer; and an FTN interference estimation unit for providing the FTN signal sequence, from which an FTN interference sequence is eliminated, to the equalizer, using the interleaved LLR sequence.
    Type: Application
    Filed: January 31, 2017
    Publication date: February 1, 2018
    Inventors: Joung-Il YUN, Sang-Woon KWAK, Myung-Sun BAEK, Hae-Chan KWON, Hyoung-Soo LIM, Nam-Ho HUR, Nam-Shik KIM, Bi-Woong CHUNG
  • Publication number: 20170346599
    Abstract: Disclosed is an apparatus and method for supporting cooperative transmission, the apparatus including a controller configured to determine detection bits with respect to a plurality of relay terminals based on channel states between a source terminal and the plurality of relay terminals, the relay terminals configured to detect sub-data corresponding to the detection bits from data when the data is transmitted from the source terminal, an interface configured to receive the sub-data from the relay terminals, respectively, in response to the relay terminals detecting the sub-data, and a restorer configured to restore the data by combining the received sub-data.
    Type: Application
    Filed: March 15, 2017
    Publication date: November 30, 2017
    Inventors: Myung Sun BAEK, Sang Woon KWAK, Young Su KIM, Joung Il YUN, Hyoung Soo LIM, Nam Ho HUR