公开(公告)号：US11838565B2

公开(公告)日：2023-12-05

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 ,  H04L1/16 ,  H04N21/64

CPC classification number: H04N21/2343 ,  H04L1/16 ,  H04N21/64

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：US11838168B2

公开(公告)日：2023-12-05

申请号：US17593774

申请日：2019-04-30

Applicant: LG ELECTRONICS INC.

Inventor： Joongkwan Huh ,  Jaewook Song ,  Kyuin Lee

IPC: H04L5/00 ,  H04L27/26 ,  H04L27/38 ,  H04L27/34

CPC classification number: H04L27/3809 ,  H04L27/3427

Abstract: A method for supporting a receiving operation based on 2D-NUC performed by a first wireless device according to the present embodiment, comprises the steps of: receiving first and second input information from a second wireless device; performing equalization on the first and second input information; and generating LLR information on the basis of lookup table information predetermined for the equalized first and second input information and 2D-NUC.

公开(公告)号：US11743089B2

公开(公告)日：2023-08-29

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

CPC classification number: H04L27/2647

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：US11695453B2

公开(公告)日：2023-07-04

申请号：US17599419

申请日：2019-05-07

Applicant: LG ELECTRONICS INC.

Inventor： Hyowon Bae ,  Jungwoo Kim ,  Jinmin Kim ,  Jaewook Song ,  Jinsoo Choi

IPC: H04B7/0408 ,  H04B17/309 ,  H04B7/0413 ,  H04B7/0491

CPC classification number: H04B7/0408 ,  H04B7/0413 ,  H04B7/0491 ,  H04B17/309

Abstract: A method by which a first wireless device maintains beamforming in a wireless AV system, according to one embodiment of the present invention, comprises the steps of: transmitting a packet including a non-training field and a plurality of training fields to a second wireless device, wherein the non-training field is transmitted on the basis of the best sector combination from among a plurality of candidate sector combinations predetermined between the first wireless device and the second wireless device, and the plurality of training fields is transmitted on the basis of the plurality of candidate sector combinations; receiving candidate beam feedback information as a response to the plurality of training fields; determining, on the basis of the candidate beam feedback information, whether a channel change due to an obstacle occurs; and updating the best sector combination on the basis of the candidate beam feedback information when it is determined that the channel change occurs.

公开(公告)号：US11438040B2

公开(公告)日：2022-09-06

申请号：US17299740

申请日：2019-12-02

Applicant: LG ELECTRONICS INC.

Inventor： Jinmin Kim ,  Jaewook Song ,  Hyowon Bae ,  Jinsoo Choi ,  Kyuin Lee

IPC: H04L5/12 ,  H04B7/0456 ,  H04B7/0408 ,  H04B7/0491 ,  H04B7/06 ,  H01Q19/13 ,  H01Q21/24

Abstract: The present disclosure relates to a data transmission apparatus and method using a polarized antenna in a wireless AV system, and a data reception apparatus and method. The present specification provides a method for performing polarization alignment for a downlink on the basis of reciprocity, a method for performing polarization alignment for an uplink, and a method for performing polarization alignment independently for each DMG antenna when one data transmission apparatus or one data reception apparatus uses multiple DMG antennas. Optimal MIMO performance can be guaranteed by aligning polarization between multiple antennas of the data transmission apparatus and the data reception apparatus in the wireless AV system, the polarization alignment for a downlink or an uplink may be selectively performed on the basis of reciprocity, and polarization distortion can be reduced through the independent polarization alignment between each DMG antenna.