公开(公告)号：US20220232417A1

公开(公告)日：2022-07-21

申请号：US17595965

申请日：2019-06-28

Applicant: LG ELECTRONICS INC.

Inventor： Seongyeon KIM ,  Jinmin KIM ,  Jaewook SONG ,  Jinsoo CHOI

IPC: H04W28/04 ,  H04W28/14 ,  H04W72/14 ,  H04L5/00

Abstract: The present invention relates to a device for transmitting data in a wireless AV system, and a device for receiving data in a wireless AV system. The present specification discloses a device comprising: a communication unit configured to receive, from an initiator, a forward direction data frame and reverse direction grant information, instructing that reverse direction transmission be allowed, within a transmission opportunity acquired by the initiator, generate and transmit to the initiator, a block ACK frame pertaining to the forward direction data frame, and buffer a reverse direction data frame to be transmitted to the initiator; and a processor connected to the communication unit and configured to acquire AV data from the forward direction data frame.

公开(公告)号：US20220014239A1

公开(公告)日：2022-01-13

申请号：US17292693

申请日：2019-09-10

Applicant: LG ELECTRONICS INC.

Inventor： Jinmin KIM ,  Hyowon BAE ,  Jaewook SONG ,  Kyuin LEE ,  Jinsoo CHOI

IPC: H04B7/0413 ,  H04B7/06

Abstract: The present invention relates to an apparatus and a method for performing beamforming using multiple antennas in a wireless AV system. The present specification discloses a wireless data transmission apparatus comprising: a plurality of transmission antennas; a communication circuit for performing a MIMO beamforming procedure on the basis of an individual transmission sector sweep for each of the plurality of transmission antennas during a data transmission interval within a beacon interval, and transmitting a physical layer protocol data unit (PPDU) frame to a wireless data reception apparatus through the plurality of transmission antennas; and a processor connected to the communication circuit, and configured to generate AV data to be transmitted through the PPDU frame and provide the generated AV data to the communication circuit. The present invention can reduce time required for MIMO beamforming while minimizing training of an excessive sector combination in a communication procedure or information related to the MIMO beamforming in a wireless AV system, and maintain the reliability of the system by using an optimum sector combination.

公开(公告)号：US20220255601A1

公开(公告)日：2022-08-11

申请号：US17597595

申请日：2019-07-16

Applicant: LG ELECTRONICS INC.

Inventor： Jungho NOH ,  Jinmin KIM ,  Jaewook SONG ,  Jinsoo CHOI

IPC: H04B7/06 ,  H04W16/28 ,  H04W24/08 ,  H04L1/00

Abstract: The present invention relates to a device and a method for performing channel selection in a wireless AV system. Such present specification discloses a wireless data transmission device for performing channel selection, the device comprising: a communication unit for performing the steps of selecting an initial channel in a non-connection state on the basis of first channel monitoring, transmitting a periodic beacon onto the initial channel in a standby mode after switching to a connection state, and selecting a new channel in the standby mode on the basis of second channel monitoring in an interval in which beacon transmission does not occur; and a processor connected to the communication unit so as to control the operation of the communication unit. Fast and economic channel selection appropriate for the wireless AV system is possible.

公开(公告)号：US20220191560A1

公开(公告)日：2022-06-16

申请号：US17595058

申请日：2019-06-05

Applicant: LG ELECTRONICS INC.

Inventor： Hyowon BAE ,  Jinmin KIM ,  Jaewook SONG ,  Jinsoo CHOI

IPC: H04N21/2343 ,  H04N21/64 ,  H04L1/16

Abstract: The present invention relates to a data transmission device and reception device in a wireless AV system. Disclosed in the present specification is a wireless data transmission device comprising: a processor for generating a compressed bitstream by encoding media data; and a communication unit for segmenting the compressed bitstream, mapping the segmentation results to MSDUs, generating an MPDU frame sequentially including a MAC header, a frame body, and an FCS associated with the MAC header in order to transmit the MSDUs, generating a PPDU frame sequentially, which includes a preamble to which at least a portion of the MAC header is mapped, at least one PPDU to which the frame body and the FCS are mapped, and a TRN field, and transmitting the PPDU frame through a wireless channel. A data transmission rate can be improved through a reduction in overhead information.

公开(公告)号：US20170155422A1

公开(公告)日：2017-06-01

申请号：US15322706

申请日：2014-11-27

Applicant: LG ELECTRONICS INC.

Inventor： Joongkwan HUH ,  Jaewook SONG ,  Hyungsung JUNG ,  Sukhyon YOON

IPC: H04B1/7115 ,  H04B1/10

CPC classification number: H04B1/7115 ,  H04B1/1081

Abstract: A disclosure of the present specification provides a rake receiver. The rake receiver may comprise: an oscillator; a radio frequency integrated circuit (RFIC) for processing analog signals, which are received after experiencing multipath propagation, according to a sampling clock generated by the oscillator and a carrier frequency clock; a rake processing unit for allocating fingers for each path to signals output from the RFIC, and then performing decoding, wherein the rake processing unit outputs information on a timing position through time tracking, a power metric sampled on-time, and the difference between a power metric at a half chip early-time and a power metric at a half chip late-time; and an auto frequency controller (AFC) for calculating a beta (β) value for adjusting the sampling clock of the oscillator according to the ratio of the difference between the power metric at the half chip early-time and the power metric at the half chip late-time to the power metric sampled on-time.

公开(公告)号：US20230043708A1

公开(公告)日：2023-02-09

申请号：US17758597

申请日：2020-01-31

Applicant: LG ELECTRONICS INC.

Inventor： Joongkwan HUH ,  Kyuin LEE ,  Jaewook SONG ,  Kyungsoo WOO ,  Yoonsuk OH

IPC: H04L27/26

Abstract: The present specification relates to a reception apparatus and method for demodulating a signal in a wireless AV system. The reception apparatus estimates a transmission signal on the basis of an MMSE weight matrix. The reception apparatus divides the estimated transmission signal for respective reception antennas and performs an IFFT. The reception apparatus estimates and compensates for phase noise for the respective reception antennas on the basis of the signal for which the IFFT has been performed. The reception apparatus demodulates the estimated and compensated signal for respective streams.

公开(公告)号：US20180115444A1

公开(公告)日：2018-04-26

申请号：US15395499

申请日：2016-12-30

Applicant: LG ELECTRONICS INC.

Inventor： Kyuin LEE ,  Jaewook SONG ,  Sukhyon YOON

IPC: H04L25/03 ,  H04B7/0413 ,  H04B17/318 ,  H04L5/00

CPC classification number: H04L25/03904 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/10 ,  H04B17/318 ,  H04L5/0007 ,  H04L27/2634 ,  H04W52/367 ,  H04W52/42 ,  H04W88/02 ,  H04W88/08

Abstract: Provided are a method for a user equipment to select a codebook index in a wireless communication system and an apparatus supporting the method. The method performed by the user equipment comprises performing zero padding for a first vector, wherein the first vector represents a channel state measured by a receive antenna for a first transmit antenna; performing IFFT for a second vector, wherein the second vector is obtained by performing the zero padding for the first vector; performing receive antenna combining for a third vector, wherein the third vector is obtained by performing IFFT for the second vector; and detecting a maximum element from a fourth vector, wherein the fourth vector is obtained by performing the receive antenna combining for the third vector.

公开(公告)号：US20180110015A1

公开(公告)日：2018-04-19

申请号：US15389360

申请日：2016-12-22

Applicant: LG ELECTRONICS INC.

Inventor： Joongkwan HUH ,  Jaewook SONG ,  Sukhyon YOON ,  Kyuin LEE

IPC: H04W52/24 ,  H04B7/04

CPC classification number: H04W52/243 ,  H04B7/0413 ,  H04J11/005

Abstract: Provided are a method of selectively using an interference rejection combining (IRC) receiver by a user equipment (UE) in a wireless communication system, and an apparatus supporting the same. The UE may calculate a dominant interferer proportion (DIP) estimation parameter based on a covariance matrix, may estimate a DIP based on the DIP estimation parameter, and may determine whether to use the IRC receiver based on the estimated DIP and a DIP threshold.

公开(公告)号：US20240088961A1

公开(公告)日：2024-03-14

申请号：US18272069

申请日：2021-06-10

Applicant: LG ELECTRONICS INC.

Inventor： Kyuin LEE ,  Jaewook SONG ,  Sukhyon YOON

IPC: H04B7/06

CPC classification number: H04B7/0617 ,  H04B7/0634 ,  H04B7/06952

Abstract: The present invention relates to an image display device. An image display device according to an embodiment of the present invention comprises: a display; and a wireless transmission device which is spaced apart from the display and transmits image data to the display by a wireless communication method, wherein the wireless transmission device includes at least one antenna device for wirelessly transmitting image data to the display, and the wireless transmission device generates, for beamforming tracking of a beam output from the antenna device, a beamforming candidate list including some of a plurality of antenna-based indexes corresponding to a peripheral region around the antenna device, and when a difference in a signal-to-noise ratio or a metric difference between a first index and a second index adjacent to the first index among some of the plurality of antenna-based indexes is less than a beam gain, the wireless transmission device excludes the second index from the beamforming candidate list. Accordingly, it is possible to quickly perform beamforming tracking when a blocker occurs between the wireless transmission device and the display, which are arranged apart from each other.

公开(公告)号：US20220182469A1

公开(公告)日：2022-06-09

申请号：US17594514

申请日：2019-05-23

Applicant: LG ELECTRONICS INC.

Inventor： Kyuin LEE ,  Hyowon BAE ,  Jaewook SONG

IPC: H04L69/04 ,  H04B17/336 ,  H04L1/00

Abstract: An electronic device according to one embodiment of the present invention comprises: a first transmission antenna module which transmits a monitoring signal for a radio link on the basis of a preset transmission antenna weight vector according to a first control signal; a first reception antenna module which receives the monitoring signal from the first transmission antenna module on the basis of a preset reception antenna weight vector, and generates first and second monitoring result information on the basis of the monitoring signal; a second transmission antenna module which transmits the first and second monitoring result information; a second reception antenna module which receives the first and second monitoring information from the second transmission antenna module; a processor which transmits the first control signal and a second control signal associated with a compression rate determined on the basis of the first and second monitoring information; and a data compression module which performs compression on a data stream on the basis of the second control signal.