Patents by Inventor Yang-Seok Choi

Yang-Seok Choi 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: 20220158702
    Abstract: Systems and methods of beamforming and improving mmWave communications for drones are described. Multiple RF chains are used to adapt the main beam to track changes without the use of pilot signals. To reduce interference, interfering signal power is eliminated by optimizing a non-Gaussian measure to extract the interferers. The AoA of signals from a target drone on neighbouring drones and location of the neighbouring drones and base stations are used to independently corroborate the location reported by the target drone. The base station provides additional synchronization signals below 6 GHz and restricts the search/measurement space in the vertical direction. The inherent sparse structure above 6 GHz is exploited by applying different beamformers on a sounding signal and estimating the AoA and impulse response. Variations of fully digital and hybrid beamforming architectures for multi-cell DL sync and CRS measurement are described.
    Type: Application
    Filed: March 29, 2019
    Publication date: May 19, 2022
    Inventors: Venkatesan Nallampatti Ekambaram, Yang-Seok Choi, Junyoung Nam, Feng Xue, Shu-ping Yeh, Hosein Nikopour, Shilpa Talwar, Jan Schreck, Nageen Himayat, Sagar Dhakal
  • Publication number: 20220007137
    Abstract: A device including one or more processors configured to obtain an motion dataset of the device; generate one or more parameters for a machine learning algorithm based on the motion dataset; generate a predicted device trajectory using the machine learning algorithm; determine an error value of the machine learning algorithm using a cost function, wherein the error value is based on a difference between the predicted device trajectory and a reference trajectory; adjust the cost function to minimize the error value; generate one or more optimized parameters based on the adjusted cost function; and adjust the machine learning algorithm based on the one or more optimized parameters.
    Type: Application
    Filed: December 15, 2020
    Publication date: January 6, 2022
    Inventors: Jeongsik CHOI, Yang-Seok CHOI
  • Patent number: 11139946
    Abstract: The disclosure relates to a cancellation device for cancelling interference caused by a non-linear device, the cancellation device comprising: an adaptive filter coupled in parallel to the non-linear device, wherein the adaptive filter is configured to filter an input signal of the non-linear device to generate an approximation signal approximating an output signal of the non-linear device; an error signal generator configured to generate an error signal based on a function of the output signal and the approximation signal; and a controller configured to adjust the adaptive filter based on the error signal and a phase and magnitude relation of the output signal and the input signal.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: October 5, 2021
    Assignee: Apple Inc.
    Inventors: Venkatesan Nallampattiekambaram, Yang-Seok Choi
  • Publication number: 20210281364
    Abstract: In a communication method to communicate between an access point (AP) and first and second communication stations (STAs) can include calculating joint transmission information based on the first and the second STAs, establishing an uplink communication between the AP and the first STA; and establishing a downlink communication between the AP and the second STA jointly with the uplink communication between the AP and the first STA based on the joint transmission information.
    Type: Application
    Filed: September 29, 2016
    Publication date: September 9, 2021
    Inventors: Shu-Ping Yeh, Ping Wang, Alexander W. Min, Yang-Seok Choi
  • Publication number: 20210204243
    Abstract: Methods, apparatuses, and computer readable media for parameter update for range-based positioning. An apparatus of a station (STA) for parameter update for range-based positioning, the apparatus including processing circuitry configured to perform a distance estimating method with access points (APs) to determine distance estimates between the APs and the STA, the distant estimating method including parameters, and configured to determine a location of the STA based on the distance estimates between the APs and the STAs and locations of the APs. The processing circuitry further configured to: update the parameters by subtracting from a parameter of the parameters a learning rate times a derivative of a cost function with respect to the parameter, where the cost function is based on the determined location of the STA, the locations of the APs, and the distance estimates between the APs and the STA.
    Type: Application
    Filed: December 27, 2019
    Publication date: July 1, 2021
    Inventors: Jeongsik Choi, Yang-Seok Choi
  • Patent number: 10892813
    Abstract: Aspects of mmWave beam tracking and beam sweeping are described, for example, an apparatus can include an antenna array including sub-arrays and processing circuitry configured to perform beamforming, beam tracking, and management thereof at the antenna sub-arrays. The processing circuitry can further be configured to determine the angle of arrival of a received signal received in response to performing the beamforming function and adjust phase shifters of the apparatus according to the angle of arrival. Other apparatuses, systems and methods are described.
    Type: Grant
    Filed: January 28, 2020
    Date of Patent: January 12, 2021
    Assignee: Intel Corporation
    Inventors: Oner Orhan, Hosein Nikopour, Shilpa Talwar, Yang-Seok Choi, Venkatesan Nallampatti Ekambaram
  • Patent number: 10863506
    Abstract: Embodiments of the present invention provide a virtual multicarrier design for orthogonal frequency division multiple access communications. Other embodiments may be described and claimed.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: December 8, 2020
    Assignee: Apple Inc.
    Inventors: Hujun Yin, Rongzhen Yang, Xiaoshu Qian, Yang-Seok Choi, Sassan Ahmadi, Kamran Etemad
  • Publication number: 20200367271
    Abstract: Embodiments of the present disclosure describe methods, apparatuses, and systems for enhanced control signaling using full-duplex communication in wireless communication networks. A base station may schedule a first user equipment (UE) for primary access to a set of time-frequency resources in a first communication direction (e.g., uplink or downlink) The base station may additionally schedule a second UE for secondary access to the same set of time-frequency resources in a second communication direction that is the opposite of the first communication direction. The secondary access may be used to communicate supplemental control information, such as a channel quality indicator (CQI) and/or modulation and coding scheme (MCS) feedback, hybrid automatic repeat request (HARQ) feedback, and/or multiple input multiple output (MIMO) feedback (e.g., including a rank indicator (RI) and/or a pre-coding matrix indicator (PMI). Other embodiments may be described and claimed.
    Type: Application
    Filed: April 2, 2018
    Publication date: November 19, 2020
    Inventors: Jingwen BAI, Shu-ping YEH, Yang-Seok CHOI
  • Patent number: 10833832
    Abstract: A communication device and a method for determining an information from a second device including setting an initial beamforming pattern is provided. The initial beamforming pattern includes a beamforming direction and a corresponding beamforming area for each of the plurality of antenna ports, including determining a concerned direction interval based on overlapping beamforming areas of adjacent pairs of the plurality of antenna ports, receiving a signal from the second device, measuring a signal gain from the signal on each of the plurality of antenna ports, determining which concerned direction interval the second device occupies based on an antenna port having the highest signal gain and on one of the adjacent pair of antenna ports to the antenna port having the highest signal gain having a higher signal gain, and determining the information from the second device based on the determined concerned direction interval.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: November 10, 2020
    Assignee: INTEL CORPORATION
    Inventors: Shu-Ping Yeh, Jingwen Bai, Sung-En Chiu, Ping Wang, Feng Xue, Yang-Seok Choi, Shilpa Talwar
  • Patent number: 10819414
    Abstract: A wireless communication device according to some aspects includes an output determiner configured to determine first weighted signals for a plurality of antennas with first beamforming weights, a selector configured to select, from the plurality of antennas, a reference antenna based on signal powers of the first weighted signals, a weight controller configured to determine second beamforming weights for a predetermined number of antennas of the plurality of antennas based on a difference between the first weighted signal of the reference antenna and the first weighted signals of the predetermined number of antennas, the output determiner further configured to determine second weighted signals for the plurality of antennas with the second beamforming weights.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: October 27, 2020
    Assignee: Intel Corporation
    Inventors: Yang-Seok Choi, Venkatesan Nallampatti Ekambaram
  • Publication number: 20200304198
    Abstract: Aspects of mmWave beam tracking and beam sweeping are described, for example, an apparatus can include an antenna array including sub-arrays and processing circuitry configured to perform beamforming, beam tracking, and management thereof at the antenna sub-arrays. The processing circuitry can further be configured to determine the angle of arrival of a received signal received in response to performing the beamforming function and adjust phase shifters of the apparatus according to the angle of arrival. Other apparatuses, systems and methods are described.
    Type: Application
    Filed: January 28, 2020
    Publication date: September 24, 2020
    Inventors: Oner Orhan, Hosein Nikopour, Shilpa Talwar, Yang-Seok Choi, Venkatesan Nallampatti Ekambaram
  • Publication number: 20200229206
    Abstract: A central trajectory controller including a cell interface configured to establish signaling connections with one or more backhaul moving cells and to establish signaling connections with one or more outer moving cells, an input data repository configured to obtain input data related to a radio environment of the one or more outer moving cells and the one or more backhaul moving cells, and a trajectory processor configured to determine, based on the input data, first coarse trajectories for the one or more backhaul moving cells and second coarse trajectories for the one or more outer moving cells, the cell interface further configured to send the first coarse trajectories to the one or more backhaul moving cells and to send the second coarse trajectories to the one or more outer moving cells.
    Type: Application
    Filed: March 26, 2020
    Publication date: July 16, 2020
    Inventors: Biljana BADIC, Steven A. BOWERS, Yang-Seok CHOI, Miltiadis FILIPPOU, Bertram GUNZELMANN, Nageen HIMAYAT, Ingolf KARLS, Nirlesh Kumar KOSHTA, Rajkumar KRISHNAPERUMAL, Markus Dominik MUECK, Hosein NIKOPOUR, Pradeep C. PANGI, Jerome PARRON, Bernhard RAAF, Sabine ROESSEL, Dario SABELLA, Bernd SCHALLER, Domagoj SIPRAK, Christopher STOBART, Shashanka T R, Sudeep VAMANAN, Zhibin YU, Jing ZHU
  • Patent number: 10715235
    Abstract: Disclosed herein are methods and apparatuses configured to direct wireless communication. In some embodiments, a network apparatus is configured to: receive a first signal transmission from a remote station via a first antenna element of an antenna and a second signal transmission from the remote station via a second antenna element of the antenna simultaneously; determine first signal information for the first transmission; determine second signal information for the second transmission, wherein the second signal information is different than the first signal information; determine a set of weighting values based on the first signal information and the second signal information, wherein the set of weighting values is configured to construct one or more beam-formed transmission signals; and generate the one or more beam-formed transmission signals based on the set of weighting values for transmission to the remote station.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: July 14, 2020
    Inventors: Marcus Da Silva, Vahid Tarokh, Praveen Mehrotra, William J. Crilly, Jr., James Brennan, Robert J. Conley, Siavash Alamouti, Eduardo Casas, Hujun Yin, Bobby Jose, Yang-Seok Choi
  • Publication number: 20200119890
    Abstract: A communication device and a method for determining an information from a second device including setting an initial beamforming pattern is provided. The initial beamforming pattern includes a beamforming direction and a corresponding beamforming area for each of the plurality of antenna ports, including determining a concerned direction interval based on overlapping beamforming areas of adjacent pairs of the plurality of antenna ports, receiving a signal from the second device, measuring a signal gain from the signal on each of the plurality of antenna ports, determining which concerned direction interval the second device occupies based on an antenna port having the highest signal gain and on one of the adjacent pair of antenna ports to the antenna port having the highest signal gain having a higher signal gain, and determining the information from the second device based on the determined concerned direction interval.
    Type: Application
    Filed: June 22, 2016
    Publication date: April 16, 2020
    Inventors: Shu-Ping YEH, Jingwen BAI, Sung-En CHIU, Ping WANG, Feng XUE, Yang-Seok CHOI, Shilpa TALWAR
  • Patent number: 10594376
    Abstract: Disclosed herein are methods and apparatuses configured to direct wireless communication. In some embodiments, a networking apparatus is configured to generate a plurality of sequences of symbols for transmission to plurality of client devices; transmit the plurality of sequences to the plurality of client device via one or more beams focused toward the client devices; receive information regarding the one or more beams from the client devices; and modify at least one of the one or more beams based on the information.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: March 17, 2020
    Inventors: Marcus Da Silva, William J. Crilly, Jr., James Brennan, Robert J. Conley, Siavash Alamouti, Eduardo Casas, Hujun Yin, Bobby Jose, Yang-Seok Choi, Vahid Tarokh, Praveen Mehrotra
  • Patent number: 10594383
    Abstract: Aspects of mmWave beam tracking and beam sweeping are described, for example, an apparatus can include an antenna array including sub-arrays and processing circuitry configured to perform beamforming, beam tracking, and management thereof at the antenna sub-arrays. The processing circuitry can further be configured to determine the angle of arrival of a received signal received in response to performing the beamforming function and adjust phase shifters of the apparatus according to the angle of arrival. Other apparatuses, systems and methods are described.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: March 17, 2020
    Assignee: Intel Corporation
    Inventors: Oner Orhan, Hosein Nikopour, Shilpa Talwar, Yang-Seok Choi, Venkatesan Nallampatti Ekambaram
  • Patent number: 10554246
    Abstract: A circulator system for use in a simultaneous transmit and receive system includes a transmitter port connected to a first port of a circulator component by a phase shifter and possibly a pre-conditioning impedance, an antenna port connected to a second port of the circulator component by a pre-conditioning impedance, and a receiver port connected to a third port of the circulator component by a phase shifter and a pre-conditioning impedance. A loop with an impedance is connected between the transmitter port and the receiver port. A double loop circulator system includes further phase shifters and impedances at the first and third ports of the circulator component and a second loop with an impedance connected signal paths for the transmitter and receiver ports, being connected between the phase shifters in the signal paths. High isolation between the transmitter and receiver ports is provided.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: February 4, 2020
    Assignee: Intel Corporation
    Inventors: Tae Young Yang, Eduardo X. Alban, Yang-Seok Choi, Timo Huusari
  • Publication number: 20190362237
    Abstract: Systems, methods, computer program products, and apparatuses to determine, by a neural network based on training data related to wireless signals exchanged by a device and a plurality of wireless access points in an environment, a respective distance between the device and each wireless access point, receive location data related to a respective location of each wireless access point of the plurality of wireless access points, determine a geometric cost of the neural network based on a geometric cost function, the respective distances, and the received location data, and train a plurality of values of the neural network based on a backpropagation and the determined geometric cost.
    Type: Application
    Filed: May 29, 2019
    Publication date: November 28, 2019
    Applicant: Intel Corporation
    Inventors: Jeongsik Choi, Venkatesan Nallampatti Ekambaram, Yang-Seok Choi
  • Publication number: 20190349945
    Abstract: Devices and methods of providing joint scheduling in a full-duplex LTE system are generally described. The UE measures intra-cell interference at the UE caused by a UL transmission from each intra-cell UE, calculates a ratio of the intra-cell interference over an average inter-cell interference, determines whether the intra-cell UE is an aggressor or non-aggressor based on whether the ratio exceeds a threshold, transmits at least some of the determinations to the eNB as feedback, and communicates with the eNB based on a schedule that is dependent on the feedback such that the UE is neither an aggressor nor is subject to interference from aggressors. The schedule may also be based on wideband CQI feedback based on a ratio of an average overall DL interference plus noise over the average inter-cell interference plus noise and/or subband CQI feedback based on SINR measurements.
    Type: Application
    Filed: April 25, 2016
    Publication date: November 14, 2019
    Inventors: Shu-Ping Yeh, Jingwen Bai, SUNG-EN CHIU, Ping Wang, Feng Xue, Yang-Seok Choi, Shilpa Talwar
  • Publication number: 20190305814
    Abstract: A circulator system for use in a simultaneous transmit and receive system includes a transmitter port connected to a first port of a circulator component by a phase shifter and possibly a pre-conditioning impedance, an antenna port connected to a second port of the circulator component by a pre-conditioning impedance, and a receiver port connected to a third port of the circulator component by a phase shifter and a pre-conditioning impedance. A loop with an impedance is connected between the transmitter port and the receiver port. A double loop circulator system includes further phase shifters and impedances at the first and third ports of the circulator component and a second loop with an impedance connected signal paths for the transmitter and receiver ports, being connected between the phase shifters in the signal paths. High isolation between the transmitter and receiver ports is provided.
    Type: Application
    Filed: March 30, 2018
    Publication date: October 3, 2019
    Inventors: Tae Young Yang, Eduardo X. Alban, Yang-Seok Choi, Timo Huusari