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：US11784663B2

公开(公告)日：2023-10-10

申请号：US17627434

申请日：2019-07-16

Applicant: LG Electronics Inc.

Inventor： Kijun Jeon ,  Sangrim Lee

IPC: H03M13/00 ,  H03M13/11 ,  H03M13/27

CPC classification number: H03M13/1168 ,  H03M13/1185 ,  H03M13/2778 ,  H03M13/6544

Abstract: A method for performing low density parity check (LDPC) coding of a transmitter in a wireless communication system, according to the present disclosure, may comprise the steps of: acquiring a proto-matrix corresponding to a protograph; on the basis of weights and lifting factors of columns of the proto-matrix, acquiring one or more permuted vectors corresponding to each of the columns, a first permuted vector included in the one or more permuted vectors having been randomly generated; distributing the one or more permuted vectors for each row of a corresponding column; on the basis of the distributed one or more permuted vectors, acquiring a plurality of lifted sub matrices corresponding to a plurality of elements of the proto-matrix; generating a base graph on the basis of the plurality of lifted sub matrices; generating a parity check matrix (PCM) on the basis of the base graph; and performing LDPC coding by using the PCM.

公开(公告)号：US11777524B2

公开(公告)日：2023-10-03

申请号：US17605850

申请日：2019-04-22

Applicant: LG Electronics Inc.

Inventor： Kijun Jeon ,  Sangrim Lee

IPC: H03M13/00 ,  H03M13/11 ,  H04L1/00

CPC classification number: H03M13/1148 ,  H03M13/611 ,  H04L1/0057

Abstract: A method for supporting a rate-compatible non-binary LDPC code, performed by a wireless device, according to the present embodiment, comprises the steps of: acquiring a kernel part comprising a plurality of first check nodes and a plurality of first variable nodes, the kernel part having a predetermined first code rate applied thereto, and the level of each of the plurality of first variable nodes included in the kernel part being set to 2; and generating, on the basis of the kernel part, a protograph having a second code rate, when a change from the first code rate to the second code rate is required.

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：US11575417B2

公开(公告)日：2023-02-07

申请号：US17263510

申请日：2019-07-29

Applicant: LG ELECTRONICS INC.

Inventor： Haewook Park ,  Hyungtae Kim ,  Jiwon Kang ,  Sangrim Lee

IPC: H04B7/0456 ,  H04L5/00

Abstract: The present disclosure relates to a method, performed by a user equipment (UE), for reporting channel state information (CSI) in a wireless communication system and an apparatus therefor. According to the present disclosure, the UE receives a channel state information reference signal (CSI-RS) from a base station through a multiple antenna port; and reports the CSI to the base station, wherein the CSI includes a precoding matrix indicator for a codebook generated by linear combination, wherein the codebook is generated based on a specific parameter set, and wherein the specific parameter set is differently set/applied based on at least one of a rank value or at least one layer index of a specific rank.

公开(公告)号：US20220385406A1

公开(公告)日：2022-12-01

申请号：US17619408

申请日：2019-07-03

Applicant: LG ELECTRONICS INC.

Inventor： Sangrim Lee ,  Byounghoon Kim ,  Kijun Jeon

IPC: H04L1/18

Abstract: Disclosed is a method by which a terminal decodes a codeword in a wireless communication system. Specifically, the method may comprise: receiving a plurality of codewords; and decoding the plurality codewords on the basis of successive interference cancellation (SIC). In particular, the SIC may be performed on the basis of a decoding policy for decoding the plurality of codewords. In particular, the decoding policy may be determined by a neural network trained on the basis of a state and a reward related to the plurality of codewords.

公开(公告)号：US11516692B2

公开(公告)日：2022-11-29

申请号：US16652885

申请日：2018-11-08

Applicant: LG Electronics Inc.

Inventor： Seungmin Lee ,  Hyukjin Chae ,  Hanbyul Seo ,  Sangrim Lee

IPC: H04W28/02 ,  H04W28/12 ,  H04W64/00

Abstract: A distance measurement method of user equipment in a wireless communication system is provided. The method comprises receiving a plurality of ranging request signals and transmitting a plurality of ranging response signals for the plurality of ranging request signals, wherein the number of transmitted ranging response signals is less than or equal to a maximum response signal number, and the maximum response signal number is determined on the basis of a channel busy ratio (CBR) measured by the terminal.

公开(公告)号：US11490284B2

公开(公告)日：2022-11-01

申请号：US17254842

申请日：2019-06-14

Applicant: LG ELECTRONICS INC.

Inventor： Sangrim Lee ,  Woonghee Lee

IPC: H04W24/10 ,  H04W4/029 ,  G01S5/10 ,  H04L5/00 ,  H04W4/02

Abstract: A method for reporting, by a terminal, a measurement result for location determination according to an embodiment of the present disclosure comprises the steps of: determining whether a channel characteristic between the terminal and each base station included in a plurality of base stations configured for location determination of the terminal corresponds to a visible ray (line of sight: LoS); calculating a reference signal time difference (RSTD) by configuring, as a reference cell, one of the base stations, the channel characteristics of which correspond to a visible ray (LoS); and reporting a measurement result including the RSTD.