公开(公告)号：US10333581B2

公开(公告)日：2019-06-25

申请号：US15555933

申请日：2016-07-07

Applicant: LG ELECTRONICS INC.

Inventor： Dongkyu Kim ,  Hyunsoo Ko ,  Kwangseok Noh ,  Sangrim Lee ,  Hojae Lee

IPC: H04B1/525 ,  H04L25/02 ,  H04L5/00 ,  H04L5/14 ,  H04L27/26 ,  H04B1/04

Abstract: A method for a FDR scheme-using communication device transmitting reference signals for estimating a channel of a non-linear self-interference signal comprises the step of transmitting, on a specific symbol of a corresponding subframe, reference signals for estimating the channel of the non-linear self-interference signal, wherein a sequence mapped to the reference signals is a sequence generated in a frequency domain by being discrete Fourier transform (DFT)-converted, and the generated sequence may be mapped, on the frequency domain, to a RE for the reference signals.

公开(公告)号：US20190181993A1

公开(公告)日：2019-06-13

申请号：US16323586

申请日：2017-07-27

Applicant: LG Electronics Inc.

Inventor： Hojae Lee ,  Sangrim Lee ,  Kijun Kim ,  Byounghoon Kim

IPC: H04L5/00 ,  H04J13/16 ,  H04J13/10 ,  H04W72/04

Abstract: A method and a device for performing communication by using a non-orthogonal code multiple access scheme in a wireless communication system are provided. Particularly, a terminal receives control information from a base station. The terminal modulates or demodulates a terminal-specific NCC on the basis of the control information. The terminal performs the non-orthogonal code multiple access scheme by using the terminal-specific NCC. The control information includes information on a codeword composed of a Grassmannian sequence. The codeword is included in a codebook predefined for the non-orthogonal code multiple access scheme. Each coefficient of the Grassmannian sequence is quantized on the basis of an M-quadrature amplitude modulation (M-QAM) constellation.

公开(公告)号：US20180287739A1

公开(公告)日：2018-10-04

申请号：US15937115

申请日：2018-03-27

Applicant: LG ELECTRONICS INC.

Inventor： Dongkyu Kim ,  Woochan Kim ,  Sangrim Lee ,  Hojae Lee

IPC: H04L1/00 ,  H04L5/14 ,  H04L5/00 ,  H04J11/00

Abstract: A method for a base station processing an in-band emission interference signal caused when the base station operating in a Full Duplex Radio (FDR) mode transceives signals using a Frequency Division Multiplexing (FDM) manner includes transmitting a downlink signal in a flexible downlink duration of an uplink band; and processing the in-band emission interference signal caused by transmission of the downlink signal in an uplink duration of the uplink band, wherein the processing of the in-band emission interference signal is performed by puncturing a corresponding resource of the uplink duration, wherein the resource on the downlink signal is transmitted is mirrored to the corresponding resource of the uplink duration from a Direct Current (DC) subcarrier as a reference.

公开(公告)号：US20180254926A1

公开(公告)日：2018-09-06

申请号：US15755413

申请日：2016-05-24

Applicant: LG ELECTRONICS INC.

Inventor： Dongkyu Kim ,  Hyunsoo Ko ,  Kwangseok Noh ,  Sangrim Lee ,  Hojae Lee

IPC: H04L25/03 ,  H04L27/26

CPC classification number: H04L25/0328 ,  H04B1/525 ,  H04L5/1461 ,  H04L25/0224 ,  H04L25/03821 ,  H04L27/2691 ,  H04W72/082

Abstract: A method for cancelling self-interference by a base station that uses a full duplex radio (FDR) scheme may comprise the steps of: transmitting, to a terminal, information associated with reference signal (RS) power boosting, which has been changed for estimation of a self-interference channel; transmitting an RS on the basis of the changed RS power boosting; estimating the self-interference channel according to the RS; and cancelling the self-interference on the basis of the estimation of the self-interference channel.

公开(公告)号：US12126387B2

公开(公告)日：2024-10-22

申请号：US18014052

申请日：2020-07-02

Applicant: LG ELECTRONICS INC.

Inventor： JaYeong Kim ,  Byungkyu Ahn ,  Sangrim Lee ,  Hojae Lee

IPC: H04B10/70 ,  H04B10/077 ,  H04L9/08

CPC classification number: H04B10/70 ,  H04B10/077 ,  H04L9/0852

Abstract: Provided are a device and a method performed by the device to correct an error in a quantum communication system. The method is characterized by comprising: transmitting a random access (RA) preamble to another device; receiving a random access response (RAR) from the other device as a response to the RA preamble; performing a radio resource control (RRC) connection procedure with the other device; and transmitting data to the other device, wherein the data is encoded on the basis of key information, the error is measured on the basis of a test pulse, and the key information is distributed to the device and the other device on the basis of the error being corrected using an improved Faraday rotator mirror of the device.

公开(公告)号：US12120652B2

公开(公告)日：2024-10-15

申请号：US17421216

申请日：2019-01-08

Applicant: LG ELECTRONICS INC.

Inventor： Kijun Jeon ,  Sangrim Lee ,  Hojae Lee

IPC: H04W72/04 ,  H04W72/0453

CPC classification number: H04W72/0453

Abstract: The present specification provides a method for transmitting a signal in a wireless communication system. More specifically, the method performed by a transmission terminal comprises the steps of: generating at least one bit into a complex symbol by using a modulation scheme; mapping the complex symbol to subcarriers each having an even index or subcarriers each having an odd index among subcarriers of at least one configured resource block; performing IFFT on the subcarriers to which the complex symbol is mapped, in order to generate a time-continuous signal; performing a DC bias on the time-continuous signal; and transmitting the DC biased signal.

公开(公告)号：US20230361873A1

公开(公告)日：2023-11-09

申请号：US18026414

申请日：2021-09-24

Applicant: LG ELECTRONICS INC.

Inventor： Hojae Lee ,  Byounghoon Kim ,  Sangrim Lee

IPC: H04B10/079 ,  H04B10/60

CPC classification number: H04B10/07955 ,  H04B10/60

Abstract: A receiver used in an optical wireless communication system is provided. The receiver comprises: a receiving aperture for receiving an optical signal; a coupler for separating the optical signal received by means of the receiving aperture into a main signal and a sensing signal; a sensor for determining a control voltage Vo on the basis of the sensing signal; and a detector for outputting an electric signal which is an output voltage V on the basis of the main signal and control voltage Vo. The detector is formed such that the transfer function of the detector changes on the basis of the control voltage Vo.

公开(公告)号：US11658743B2

公开(公告)日：2023-05-23

申请号：US17597113

申请日：2019-06-28

Applicant: LG ELECTRONICS INC.

Inventor： Hojae Lee ,  Sangrim Lee ,  Byounghoon Kim

IPC: H04B10/00 ,  H04B10/112 ,  H04B10/2507

CPC classification number: H04B10/1123 ,  H04B10/2507

Abstract: A method of receiving, by a receiving terminal, a signal in optical wireless communication is proposed. The method may comprise: establishing a communication link for performing the optical wireless communication with a transmitting terminal; receiving an optical signal from the transmitting terminal through the communication link; and performing interference cancelation on the optical signal. Here, establishing the communication link comprises transmitting and receiving initial information with the transmitting terminal, wherein the initial information may include an orbital angular momentum (OAM) mode applied to the optical signal. In addition, the interference cancelation may be performed on the basis of the OAM mode.

公开(公告)号：US11290155B2

公开(公告)日：2022-03-29

申请号：US16756836

申请日：2018-10-17

Applicant: LG ELECTRONICS INC.

Inventor： Hojae Lee ,  Gwanmo Ku ,  Sangrim Lee

IPC: H03D3/22 ,  H04B7/0417 ,  H04B17/336 ,  H04B7/06

Abstract: A method for transmitting feedback information by a terminal may comprise the steps of: receiving, from a base station, information on a feedback group allocated to the terminal in a predefined feedback table; selecting a first feedback index in the allocated feedback group; and transmitting feedback information including the selected first feedback index to the base station, wherein the feedback table includes a plurality of feedback groups, the plurality of feedback groups in the feedback table include predetermined number of feedback indices, respectively, and the plurality of feedback groups in the feedback table have differently configured quantization level resolutions for the feedback information, respectively.

公开(公告)号：US11245290B2

公开(公告)日：2022-02-08

申请号：US17047526

申请日：2018-04-24

Applicant: LG ELECTRONICS INC.

Inventor： Dongkyu Kim ,  Sangrim Lee ,  Hojae Lee

IPC: H02J50/20 ,  H02J50/80 ,  H02J50/40 ,  H02J50/00 ,  H01Q1/24 ,  H01Q1/52

Abstract: The present disclosure relates to an apparatus and a method for performing transmission and reception of wireless power. The apparatus comprises: a transmission signal processing unit configured to generate a transmission data signal and perform a modulation and an amplification; a transmission antenna configured to convert the transmission data signal into an RF signal and transmit the RF signal; at least one reception antenna configured to receive at least one of the RF signal or an external signal received from the outside; a wireless power reception unit configured to harvest power from the RF signal received through the at least one reception antenna; and a reception signal processing unit configured to demodulate the external signal received through the at least one reception antenna. Since the RF signal, which is radiated by the apparatus itself, is received again and utilized for power charging, energy can be recycled.