Patents by Inventor Dahae Chong

Dahae Chong 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: 20200169976
    Abstract: An operating method of a terminal in a wireless communication system including a cell and the terminal includes receiving an external signal including a synchronization signal block (SSB) from the cell, the SSB including a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH), obtaining a cell identification number of the cell using the PSS and the SSS, determining a plurality of decoding priorities of a plurality of candidate indexes of the SSB, and performing decoding on the PBCH based on the plurality of decoding priorities.
    Type: Application
    Filed: November 11, 2019
    Publication date: May 28, 2020
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Dahae CHONG, Haechul Lee, Joohyun Do, Myungjoon Shim, Sungyoon Cho
  • Publication number: 20200169347
    Abstract: An operating method of a terminal performing a cell search using first and second memories for buffering input samples includes detecting a first primary synchronization signal (PSS) group from a first input sample group while buffering the first input sample group in the first memory in a first interval. While buffering a second input sample group in the second memory in a second interval following the first interval, the method detects a second PSS group from the second input sample group, and a first secondary synchronization signal (SSS) group corresponding to the first PSS group from the first input sample group. While buffering a third input sample group in the first memory in a third interval following the second interval, the method detects a third PSS group from the third input sample group, and a second SSS group corresponding to the second PSS group from the second input sample group.
    Type: Application
    Filed: November 15, 2019
    Publication date: May 28, 2020
    Inventors: SUNGYOON CHO, JOOHYUN DO, MYUNGJOON SHIM, HAECHUL LEE, BORA LIM, DAHAE CHONG, SEUNGJOONG HWANG
  • Publication number: 20200169974
    Abstract: A wireless communication device including processing circuitry configured to generate first synchronization signal measurement values by combining sets of correlation values, the sets of correlation values being based on a reception signal, and each of the sets of correlation values having a number of correlation values equal to a first accumulation count, determine whether a valid synchronization signal measurement value is detected among the first synchronization signal measurement values based on a criterion, determine a frequency corresponding to the first valid synchronization signal measurement value as a synchronization frequency in response to determining the valid synchronization signal measurement value is detected, determine a second accumulation count in response to determining the valid synchronization signal measurement value is not detected, generate second synchronization signal measurement values based on the second accumulation count, and perform an initial access operation for synchronizati
    Type: Application
    Filed: September 19, 2019
    Publication date: May 28, 2020
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Haechul Lee, Dahae Chong, Sungyoon Cho
  • Patent number: 9817128
    Abstract: Disclosed herein are a method of generating a correlation function with no side-peak and a system for tracking a BOC signal in order to synchronize the BOC signal. The method of generating a correlation function includes step S1 of generating sub-correlation functions {Sl(?)}l=0N?1, step S2 of generating a first final correlation function R0(?) by combining some of the sub-correlation functions, and step S3 of generating a second final correlation function Rproposed(?) by combining R0(?) with each of the remaining sub-correlation functions that have not been used for the combination at step S2. The BOC signal is one or more of BOCsin(kn,n) and BOCcos(kn,n) signals.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: November 14, 2017
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Youngpo Lee, Dahae Chong, Junhwan Kim, Seung Goo Kang, Seokho Yoon
  • Patent number: 8737544
    Abstract: A method and an apparatus of estimating a frequency offset in a wireless communication system are provided. An orthogonal frequency division multiplexing (OFDM) receiver performs envelope equalized processing (EEP) with respect to a reception signal and calculates a partial periodogram with a plurality of test values based on the reception signal which goes through the EEP. The OFDM receiver estimates a first frequency offset, a second frequency offset, and a third frequency offset based on two partial periodograms adjacent to each other among the partial periodograms for the plurality of test values.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: May 27, 2014
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Seokho Yoon, Dahae Chong, Junhwan Kim, Seung Goo Kang, Youngpo Lee
  • Publication number: 20140125522
    Abstract: Disclosed herein are a method of generating a correlation function with no side-peak and a system for tracking a BOC signal in order to synchronize the BOC signal. The method of generating a correlation function includes step S1 of generating sub-correlation functions {Sl(?)}l=0N?1, step S2 of generating a first final correlation function R0(?) by combining some of the sub-correlation functions, and step S3 of generating a second final correlation function Rproposed(?) by combining R0(?) with each of the remaining sub-correlation functions that have not been used for the combination at step S2. The BOC signal is one or more of BOCsin(kn,n) and BOCcos(kn,n) signals.
    Type: Application
    Filed: November 2, 2011
    Publication date: May 8, 2014
    Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKEAN UNIVERVERSITY
    Inventors: Youngpo Lee, Dahae Chong, Junhwan Kim, Seung Goo Kang, Seokho Yoon
  • Publication number: 20130051447
    Abstract: A method and an apparatus of estimating a frequency offset in a wireless communication system are provided. An orthogonal frequency division multiplexing (OFDM) receiver performs envelope equalized processing (EEP) with respect to a reception signal and calculates a partial periodogram with a plurality of test values based on the reception signal which goes through the EEP. The OFDM receiver estimates a first frequency offset, a second frequency offset, and a third frequency offset based on two partial periodograms adjacent to each other among the partial periodograms for the plurality of test values.
    Type: Application
    Filed: August 29, 2012
    Publication date: February 28, 2013
    Applicant: Research & Business Foundation Sungkyunkwan Universit
    Inventors: Seokho YOON, Dahae CHONG, Junhwan KIM, Seung Goo KANG, Youngpo LEE
  • Patent number: 8340156
    Abstract: A synchronization method in a Ultra Wideband (UWB) receiver includes receiving a signal through a multipath channel, and synchronizing with a first multipath component of the received signal by computing a correlation value between the received signal and a template signal of the receiver in a predetermined search range. Since multipath components received at the receiver after the first multipath component of the received signal have lower power than that of the first multipath component, the synchronization with the first multipath component of the received signal may improve the performance in processes after the synchronization process.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: December 25, 2012
    Assignee: Sungkyunkwan University Foundation for Corporate Collaboration
    Inventors: Dahae Chong, Seokho Yoon, Sangho Ahn, Youngpo Lee
  • Patent number: 8325831
    Abstract: An integer frequency offset estimation scheme in an orthogonal frequency division multiplexing (OFDM)-based system is disclosed.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: December 4, 2012
    Assignee: Sungkyunkwan University Foundation for Corporate Collaboration
    Inventors: Youngyoon Lee, Seokho Yoon, Taeung Yoon, Dahae Chong
  • Publication number: 20100014560
    Abstract: A synchronization method in a Ultra Wideband (UWB) receiver includes receiving a signal through a multipath channel, and synchronizing with a first multipath component of the received signal by computing a correlation value between the received signal and a template signal of the receiver in a predetermined search range. Since multipath components received at the receiver after the first multipath component of the received signal have lower power than that of the first multipath component, the synchronization with the first multipath component of the received signal may improve the performance in processes after the synchronization process.
    Type: Application
    Filed: November 21, 2008
    Publication date: January 21, 2010
    Inventors: Dahae Chong, Seokho Yoon, Sangho Ahn, Youngpo Lee
  • Publication number: 20090323837
    Abstract: An integer frequency offset estimation scheme in an orthogonal frequency division multiplexing (OFDM)-based system is disclosed.
    Type: Application
    Filed: January 30, 2009
    Publication date: December 31, 2009
    Applicant: SUNGKYUNKWAN UNIVERSITY FOUNDATION FOR CORPORATE COLLABORATION
    Inventors: Youngyoon LEE, Seokho YOON, Taeung YOON, Dahae CHONG