Patents by Inventor Suk-Seung Hwang

Suk-Seung Hwang 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).

  • Patent number: 10921418
    Abstract: Provided are a method and apparatus for location estimation of terminals in a wireless communication system. A method of operating a positioning apparatus may include (a) calculating distances between a terminal and first, second, and third base stations, (b) creating first, second, and third circles centered at locations of the first, second, and third base stations with radii corresponding to the distances, (c) calculating intersection distances between two intersections formed by the second circle, which is the smallest circle, and one of the first circle and the third circle and the other two intersections formed by the first circle and the third circle, and (d) determining one of the intersections corresponding to the shortest distance among the intersection distances as the terminal's location.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: February 16, 2021
    Assignee: Industry-Academic Cooperation Foundation, Chosun University
    Inventor: Suk Seung Hwang
  • Publication number: 20200209345
    Abstract: Provided are a method and apparatus for location estimation of terminals in a wireless communication system. A method of operating a positioning apparatus may include (a) calculating distances between a terminal and first, second, and third base stations, (b) creating first, second, and third circles centered at locations of the first, second, and third base stations with radii corresponding to the distances, (c) calculating intersection distances between two intersections formed by the second circle, which is the smallest circle, and one of the first circle and the third circle and the other two intersections formed by the first circle and the third circle, and (d) determining one of the intersections corresponding to the shortest distance among the intersection distances as the terminal's location.
    Type: Application
    Filed: October 28, 2019
    Publication date: July 2, 2020
    Applicant: Industry-Academic Cooperation Foundation, Chosun University
    Inventor: Suk Seung Hwang
  • Patent number: 9891322
    Abstract: Disclosed is a GPS arrival angle selecting system. The system includes: a arrival angle estimating unit connected to a receiving antenna of a GPS receiver including at least one antenna array element and configured to decide a first arrival angle of a signal received prior to despreading and a second arrival angle of a signal received after despreading; and an arrival angle selecting unit configured to select a different peak value by comparing the first arrival angle and the second arrival angle. Also disclosed is a GPS arrival angle selecting method.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: February 13, 2018
    Assignee: Industry-Academic Cooperation Foundation, Chosun University
    Inventor: Suk-Seung Hwang
  • Publication number: 20150212210
    Abstract: Disclosed is a GPS arrival angle selecting system. The system includes: a arrival angle estimating unit connected to a receiving antenna of a GPS receiver including at least one antenna array element and configured to decide a first arrival angle of a signal received prior to despreading and a second arrival angle of a signal received after despreading; and an arrival angle selecting unit configured to select a different peak value by comparing the first arrival angle and the second arrival angle. Also disclosed is a GPS arrival angle selecting method.
    Type: Application
    Filed: November 7, 2012
    Publication date: July 30, 2015
    Inventor: Suk-Seung Hwang
  • Patent number: 8385479
    Abstract: An apparatus and a method for canceling interference based on Maximum Likelihood (ML) at a receiver of a multi-antenna system are provided. The method includes estimating a channel using a signal received over one or more receiver antennas; generating one or more weights using the estimated channel to cancel interference; detecting a candidate symbol having the shortest Euclidean distance through Maximum Likelihood using a first weight; and soft-decoding the candidate symbol using a second weight. Therefore, by receiving the signal based on the ML under the interference, the system capacity can be increased and the reception performance can be enhanced.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: February 26, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joo-Hyun Lee, Suk-Seung Hwang, Jong-Ho Lee, Soong-Yoon Choi
  • Patent number: 8374543
    Abstract: An apparatus and method for location estimation in a wireless communication system are provided. The method includes identifying if a received at least one signal passed through at least one repeater, when the received at least one signal is identified as having passed through at least one repeater, measuring a Base Station (BS) basis delay time and calculating a repeater basis delay time using the measured BS basis delay time, and estimating a location of the Mobile Station (MS) using the repeater basis delay time.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: February 12, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Suk-Seung Hwang, Joo-Hyun Lee, Sang-Boh Yun, Young-Hoon Kwon
  • Patent number: 8345786
    Abstract: A signal reception apparatus of an orthogonal frequency division multiplexing (OFDM) communication system using a multiple input, multiple output (MIMO) scheme. The signal reception apparatus, when it uses the NR receive antennas, receives a time-domain preamble signal transmitted by a signal transmission apparatus corresponding thereto via each of the NR receive antennas, and estimates a channel according to a channel estimation scheme using the time-domain preamble signal received via each of the NR receive antennas. When the signal transmission apparatus uses NT transmit antennas, the time-domain preamble signal is a signal transmitted by the signal transmission apparatus via each of the NT transmit antennas for a second time period which is set according to a corresponding transmit antenna within a first time period.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: January 1, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Suk-Seung Hwang, Sang-Boh Yun, Young-Hoon Kwon
  • Publication number: 20120009867
    Abstract: An apparatus and method for location estimation in a wireless communication system are provided. The method includes identifying if a received at least one signal passed through at least one repeater, when the received at least one signal is identified as having passed though at least one repeater, measuring a Base Station (BS) basis delay time and calculating a repeater basis delay time using the measured BS basis delay time, and estimating a location of the MS using the repeater basis delay time.
    Type: Application
    Filed: September 23, 2011
    Publication date: January 12, 2012
    Applicant: SAMSUNG ELECTRONICS CO. LTD.
    Inventors: Suk-Seung HWANG, Joo-Hyun LEE, Sang-Boh YUN, Young-Hoon KWON
  • Patent number: 8060115
    Abstract: An apparatus and method for location estimation in a wireless communication system are provided. The method includes identifying if a received at least one signal passed through at least one repeater, when the received at least one signal is identified as having passed though at least one repeater, measuring a Base Station (BS) basis delay time and calculating a repeater basis delay time using the measured BS basis delay time, and estimating a location of the MS using the repeater basis delay time.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: November 15, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Suk-Seung Hwang, Joo-Hyun Lee, Sang-Boh Yun, Young-Hoon Kwon
  • Patent number: 8031814
    Abstract: The present invention relates to an apparatus and method for estimating a channel in a wireless communication system. The apparatus according to the present invention includes an estimator for initially estimating a channel response value by using a predetermined signal among reception signals, a detector for detecting transmission signals by using the channel response value and an operator for updating the channel response value by using detected transmission signals, a detection accuracy and reception signals.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: October 4, 2011
    Assignees: Samsung Electronics Co., Ltd., Chung-Ang University Industry-Academy Cooperation Foundation
    Inventors: Suk-Seung Hwang, Joo-Hyun Lee, Sang-Boh Yun, Yong-Soo Cho, Jae-Kwon Kim, Kyu-In Lee
  • Publication number: 20090160710
    Abstract: A method and an apparatus for estimating a location to support a location based service of a terminal in a mobile communication system are provided. The method includes receiving first reference signals from three base stations, calculating TDOAs, and solving a first equation using the TDOAs based on the first reference signals; when a solution of determining a location of a terminal based on the first equation is real or imaginary values, receiving second reference signals from the three base stations, calculating TDOAs, and solving a second equation using the TDOAs based on the second reference signals; and when a solution of determining the location of the terminal based on the second equation is real or imaginary values, determining the location of the terminal based on a relation between the first equation and the second equation.
    Type: Application
    Filed: December 19, 2008
    Publication date: June 25, 2009
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Suk-Seung Hwang, Joo-Hyun Lee, Sang-Boh Yun
  • Publication number: 20090147890
    Abstract: An apparatus and a method for canceling interference based on Maximum Likelihood (ML) at a receiver of a multi-antenna system are provided. The method includes estimating a channel using a signal received over one or more receiver antennas; generating one or more weights using the estimated channel to cancel interference; detecting a candidate symbol having the shortest Euclidean distance through Maximum Likelihood using a first weight; and soft-decoding the candidate symbol using a second weight. Therefore, by receiving the signal based on the ML under the interference, the system capacity can be increased and the reception performance can be enhanced.
    Type: Application
    Filed: December 2, 2008
    Publication date: June 11, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Joo-Hyun Lee, Suk-Seung Hwang, Jong-Ho Lee, Soong-Yoon Choi
  • Publication number: 20090061899
    Abstract: An apparatus and method for location estimation in a wireless communication system are provided. The method includes identifying if a received at least one signal passed through at least one repeater, when the received at least one signal is identified as having passed though at least one repeater, measuring a Base Station (BS) basis delay time and calculating a repeater basis delay time using the measured BS basis delay time, and estimating a location of the MS using the repeater basis delay time.
    Type: Application
    Filed: August 27, 2008
    Publication date: March 5, 2009
    Applicant: SAMSUNG ELECTRONICS CO. LTD.
    Inventors: Suk-Seung HWANG, Joo-Hyun LEE, Sang-Boh YUN, Young-Hoon KWON
  • Publication number: 20080214115
    Abstract: The present invention relates to an apparatus and method for estimating a channel in a wireless communication system. The apparatus according to the present invention includes an estimator for initially estimating a channel response value by using a predetermined signal among reception signals, a detector for detecting transmission signals by using the channel response value and an operator for updating the channel response value by using detected transmission signals, a detection accuracy and reception signals.
    Type: Application
    Filed: December 21, 2007
    Publication date: September 4, 2008
    Applicants: Samsung Electronics Co., Ltd., Chung-Ang University Industry-Academy Cooperation Foundation
    Inventors: Suk-Seung Hwang, Joo-Hyun Lee, Sang-Boh Yun, Yong-Soo Cho, Jae-Kwon Kim, Kyu-In Lee
  • Publication number: 20080137769
    Abstract: A signal reception apparatus of an orthogonal frequency division multiplexing (OFDM) communication system using a multiple input, multiple output (MIMO) scheme. The signal reception apparatus, when it uses the NR receive antennas, receives a time-domain preamble signal transmitted by a signal transmission apparatus corresponding thereto via each of the NR receive antennas, and estimates a channel according to a channel estimation scheme using the time-domain preamble signal received via each of the NR receive antennas. When the signal transmission apparatus uses NT transmit antennas, the time-domain preamble signal is a signal transmitted by the signal transmission apparatus via each of the NT transmit antennas for a second time period which is set according to a corresponding transmit antenna within a first time period.
    Type: Application
    Filed: December 11, 2007
    Publication date: June 12, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Suk-Seung Hwang, Sang-Boh Yun, Young-Hoon Kwon