公开(公告)号：US10084525B2

公开(公告)日：2018-09-25

申请号：US15323611

申请日：2015-07-06

Applicant: LG ELECTRONICS INC.

Inventor： Kilbom Lee ,  Jiwon Kang ,  Kitae Kim ,  Heejin Kim

IPC: H04B7/02 ,  H04L1/02 ,  H04B7/08 ,  H04B7/0413

CPC classification number: H04B7/0842 ,  H04B7/04 ,  H04B7/0413 ,  H04B7/08 ,  H04L25/03891

Abstract: A method is provided by which a multiple-input multiple-output (MIMO) receiver, which includes a plurality of antennas, processes received signals. The MIMO receiver determines a detection order, which is the order of processing received signals received by a plurality of layers through the plurality of antennas, by using channel information of a reference resource element (RE). The MIMO receiver generates common multi filters for processing the received signals in accordance with the detection order, generates an RE group, which includes a plurality of REs and in which the common multi filters generated on the basis of the reference RE will be shared, and generates detection signals from each received signal of the REs by applying the common multi filters to each received signal of the REs excluding the reference RE in the RE group. The RE group comprises REs having the same detection order as that of the reference RE.

公开(公告)号：US10009084B2

公开(公告)日：2018-06-26

申请号：US15113999

申请日：2015-02-13

Applicant: LG ELECTRONICS INC.

Inventor： Kitae Kim ,  Jiwon Kang ,  Kilbom Lee

IPC: H04W72/04 ,  H04B7/06 ,  H04B7/0456 ,  H04W16/28

CPC classification number: H04B7/0617 ,  H04B7/0456 ,  H04B7/0639 ,  H04W16/28 ,  H04W72/046

Abstract: A method of performing a beamforming in a base station of a wireless communication system according to one embodiment of the present invention may include determining an effective range of an analog beam based on a gain of an analog beamforming in a hybrid beamforming, determining a precoding matrix for a digital beamforming in the hybrid beamforming based on the effective range of the analog beam, and performing the hybrid beamforming having the digital beamforming and the analog beamforming coupled therein based on the effective range and the precoding matrix.

公开(公告)号：US09998261B2

公开(公告)日：2018-06-12

申请号：US15307282

申请日：2015-04-30

Applicant: LG ELECTRONICS INC.

Inventor： Kilbom Lee ,  Jiwon Kang ,  Kitae Kim ,  Heejin Kim

IPC: H04B7/02 ,  H04L5/00 ,  H04B7/04 ,  H04B7/06 ,  H04L27/26 ,  H04B7/0413

CPC classification number: H04L5/0005 ,  H04B7/04 ,  H04B7/0413 ,  H04B7/06 ,  H04L5/00 ,  H04L27/26

Abstract: Disclosed are a communication method and a MIMO transmitter for measuring the inter-channel relationship of a plurality of resource elements (REs) on the basis of channel information of the plurality of REs, and dividing the plurality of REs in consideration of the measured inter-channel relationship, thereby forming one or more RE groups, and transmitting information on the RE groups to a MIMO receiver.

公开(公告)号：US09941945B2

公开(公告)日：2018-04-10

申请号：US15316820

申请日：2014-06-25

Applicant: LG ELECTRONICS INC.

Inventor： Kitae Kim ,  Heejin Kim ,  Kilbom Lee ,  Jiwon Kang

IPC: H04B7/04 ,  H04B7/0456

CPC classification number: H04B7/0456 ,  H04B7/0421 ,  H04B7/0604 ,  H04B7/0617 ,  H04B7/0639

Abstract: Disclosed in the present invention is a method for a transmitting end transmitting a signal in a wireless communication system. Specifically, the method comprises the steps of: transmitting, to a receiving end, a first reference signal for providing a reference beam which is equal in all directions, and a second reference signal for providing a boundary beam which heads toward a pre-set direction; receiving, from the receiving end, feedback information on the difference value between the reference beam gain and the boundary beam gain; estimating the mobility information of the receiving end on the basis of the amount of change in the difference value; and, by using the mobility information, performing beamforming for transmitting a signal to the receiving end.

公开(公告)号：US09935700B2

公开(公告)日：2018-04-03

申请号：US15318287

申请日：2014-09-03

Applicant: LG ELECTRONICS INC.

Inventor： Kitae Kim ,  Jiwon Kang ,  Kilbom Lee ,  Heejin Kim

IPC: H04B7/04 ,  H04B7/06 ,  H04B7/0456 ,  H04B7/0417

CPC classification number: H04B7/0617 ,  H04B7/0417 ,  H04B7/0456 ,  H04B7/0695

Abstract: A method for, at a transmitter, transmitting a signal to a receiver in a wireless communication system is disclosed. The method includes transmitting a first reference signal for omni-directionally providing a uniform reference beam to the receiver, transmitting a second reference signal for providing beams respectively corresponding to a predetermined number of sectors to the receiver, receiving, from the receiver, sector information selected based on the second reference signal and information about a beam gain difference between a beam corresponding to the selected sector and the reference beam, and performing beamforming for transmitting a signal to the receiver based on the sector information and the information about the beam gain difference.

公开(公告)号：US09918338B2

公开(公告)日：2018-03-13

申请号：US14917494

申请日：2014-09-05

Applicant: LG ELECTRONICS INC.

Inventor： Kitae Kim ,  Kilbom Lee ,  Jaehoon Chung ,  Jinmin Kim

IPC: H04W4/00 ,  H04W74/00 ,  H04W56/00 ,  H04L27/26

CPC classification number: H04W74/008 ,  H04L27/2601 ,  H04L27/2678 ,  H04W56/0005 ,  H04W56/0055

Abstract: The present invention provides a method for detecting an uplink synchronization signal in a wireless access system supporting a high-frequency band, a method for designing a detection filter for the same and an apparatus for supporting the same. According to one embodiment of the present invention, a method for detecting a random access channel signal by a base station in a wireless access system supporting the high-frequency band comprises: allocating a cyclic shift value used in the base station; configuring a received signal vector for a signal transmitted via a random access channel; detecting at least one RACH signal from the received signal vector, using a frequency domain detecting filter; and identifying at least one terminal having transmitted at least one RACH signal, using a target terminal detecting filter, wherein the filter for detecting a target terminal may be set on the basis of the cyclic shift value.

公开(公告)号：US09893789B2

公开(公告)日：2018-02-13

申请号：US15302875

申请日：2015-02-12

Applicant: LG ELECTRONICS INC.

Inventor： Kitae Kim ,  Jiwon Kang ,  Kilbom Lee ,  Heejin Kim

IPC: H04L1/02 ,  H04B7/06 ,  H04B7/0417 ,  H04B7/0452

CPC classification number: H04B7/0617 ,  H04B7/0417 ,  H04B7/0452

Abstract: A method of transmitting a reference signal for a hybrid beamforming in a base station of a wireless communication system according to one embodiment of the present invention may include selecting first subset elements arrayed in a first direction from a plurality of antenna elements included in a 2D array antenna of the base station and transmitting a first reference signal through a reference beam formed by the first subset elements, wherein a first cross-section for the first direction of the reference beam corresponds to a directional beam and wherein a second cross-section for a second direction crossing the first direction of the reference beam corresponds to an omni-directional beam.

公开(公告)号：US09893772B2

公开(公告)日：2018-02-13

申请号：US14442358

申请日：2013-08-14

Applicant: LG ELECTRONICS INC.

Inventor： Kitae Kim ,  Jinmin Kim ,  Hyunsoo Ko ,  Jaehoon Chung

IPC: H04B7/01 ,  H04L5/00 ,  H04B17/10 ,  H04L25/02 ,  H04L25/03

CPC classification number: H04B7/01 ,  H04B17/104 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0051 ,  H04L5/0053 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/03898

Abstract: A method for transmitting a reference signal to a user equipment at a base station in a wireless communication system is disclosed. The method includes transmitting a control channel and the reference signal having a first pattern for the control channel to the user equipment and transmitting a data channel and the reference signal having a second pattern for the data channel to the user equipment, wherein reference signal density of the second pattern is determined based on a coherence time of the data channel, and the first pattern includes the second pattern.

公开(公告)号：US09866295B2

公开(公告)日：2018-01-09

申请号：US15324168

申请日：2015-03-31

Applicant: LG ELECTRONICS INC.

Inventor： Jiwon Kang ,  Sunam Kim ,  Kitae Kim ,  Kilbom Lee ,  Heejin Kim

IPC: H04B7/0456 ,  H04W72/04 ,  H04L5/00 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/0617 ,  H04B7/0626 ,  H04L5/0048 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/048

Abstract: The present application discloses a method for transmitting a signal from a transmitting end to a receiving end in a wireless communication system. Specifically, the method comprises the steps of: configuring a precoder set including one or more precoders; precoding the signal by cyclically applying the one or more precoders in a specific resource unit; and transmitting the precoded signal to the receiving end, wherein at least one of the size of the precoder set and the one or more precoders is determined on the basis of the mobility of the receiving end.

公开(公告)号：US09825679B2

公开(公告)日：2017-11-21

申请号：US15325067

申请日：2015-06-30

Applicant: LG ELECTRONICS INC.

Inventor： Kitae Kim ,  Jiwon Kang ,  Kilbom Lee ,  Heejin Kim

IPC: H04L27/00 ,  H04B7/06 ,  H04W52/02

CPC classification number: H04B7/0617 ,  H04B7/0408 ,  H04B7/06 ,  H04B7/0639 ,  H04B7/0697 ,  H04W52/0206 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/21

Abstract: The present invention provides a hybrid-beamforming method for supporting multi-ranks, a beam estimation method and devices for supporting the methods. A hybrid-beamforming performance method for supporting multi-ranks in a wireless access system, according to one embodiment of the present invention, can comprise the steps of: detecting, by a transmission end, at least two analog beam candidates having a channel gain greater than or equal to a reference value; pre-compensating analog beam coefficients for at least two analog beam candidates such that one analog beam among the at least two analog beam candidates includes at least two digital beams; resetting digital PMI coefficient values for at least two digital beams so as to reflect the pre-compensated analog beam coefficients; and transmitting a multi-rank signal by using the pre-compensated analog beam coefficients and the reset digital PMI coefficient values. At this time, analog beamforming and digital beamforming are combined such that hybrid-beamforming can be performed.