公开(公告)号：US20180045821A1

公开(公告)日：2018-02-15

申请号：US15551435

申请日：2016-01-20

Applicant: LG Electronics Inc.

Inventor： Kilbom LEE ,  Jiwon KANG ,  Kitae KIM ,  Kyungmin PARK ,  Heejin KIM

IPC: G01S13/50 ,  H04W72/12 ,  H04J11/00 ,  H04W84/02

CPC classification number: G01S13/505 ,  H04J11/00 ,  H04L25/03821 ,  H04L27/2657 ,  H04L27/2676 ,  H04W72/1278 ,  H04W84/02

Abstract: Disclosed is a Doppler measurement method comprising: generating a first function defined by reception signals in two consecutive subcarriers for a specific OFDM symbol; generating a second function defined on the basis of the signs and sizes of a real part and an imaginary part of the first function; repeatedly performing a process of generating the first function and the second function for all of a set of OFDM symbols; and determining, as a Doppler value, the phase of a third function obtained by adding the results of repeatedly performing the process.

公开(公告)号：US20180041262A1

公开(公告)日：2018-02-08

申请号：US15555929

申请日：2015-12-16

Applicant: LG ELECTRONICS INC.

Inventor： Jiwon KANG ,  Kitae KIM ,  Kilbom LEE ,  Kungmin PARK ,  Heejin KIM

IPC: H04B7/06

CPC classification number: H04B7/0617 ,  H04B7/0413 ,  H04B7/063 ,  H04B7/0695

Abstract: A method of transmitting a signal, which is transmitted by a transmitting end in a wireless communication system, is disclosed in the present specification. Specifically, the method includes the steps of receiving Doppler information on a plurality of transmission beams from a receiving end; selecting a beam combination using the received Doppler information, wherein the beam combination is selected from a plurality of beam combinations depending on effective Doppler spread values of the beam combinations, wherein each of the beam combinations consists of two or more transmission beams among the plurality of transmission beams; and transmitting the signal to the receiving end using at least one transmission beam included in the selected beam combination.

公开(公告)号：US20170373911A1

公开(公告)日：2017-12-28

申请号：US15524873

申请日：2015-11-30

Applicant: LG ELECTRONICS INC.

Inventor： Kilbom LEE ,  Hangyu CHO ,  Wookbong LEE ,  Jinsoo CHOI ,  Jiwon KANG

IPC: H04L27/26 ,  H04L27/38

CPC classification number: H04L27/2694 ,  H04L5/0048 ,  H04L5/0053 ,  H04L27/26 ,  H04L27/2613 ,  H04L27/2621 ,  H04L27/3872

Abstract: Disclosed is a sequence generation method comprising: generating a basic sequence structure including C48 having 48 tones, X6 having six tones, and X5 having five tones; selecting any one of a plurality of phase rotation factors predetermined for a bandwidth; and generating a sequence to be inputted into a preamble to be transmitted to a terminal, by using the phase rotation factor, applied in basic sequence structural units, and the basic sequence structure.

公开(公告)号：US20170310516A1

公开(公告)日：2017-10-26

申请号：US15516773

申请日：2015-10-05

Applicant: LG ELECTRONICS INC.

Inventor： Kilbom LEE ,  Jinsoo CHOI ,  Wookbong LEE ,  Hangyu CHO ,  Jiwon KANG

IPC: H04L27/26 ,  H04W84/12

CPC classification number: H04L27/2608 ,  H04L27/2613 ,  H04L27/2621 ,  H04W84/12

Abstract: Disclosed is a sequence generation method for: generating a basic sequence structure comprising C52, which is composed of 52 tones, and D12, which is composed of 12 tones; selecting any one among a plurality of phase rotation factors, which are determined in advance for a bandwidth and applied to the basic sequence structure by unit of C52 or C52D12; and generating a sequence inserted into a preamble to be transmitted to a terminal.

公开(公告)号：US20170310377A1

公开(公告)日：2017-10-26

申请号：US15513419

申请日：2015-03-31

Applicant: LG ELECTRONICS INC.

Inventor： Jiwon KANG ,  Kitae KIM ,  Kilbom LEE ,  Heejin KIM

IPC: H04B7/06 ,  H04B7/0452 ,  H04L25/02

CPC classification number: H04B7/0626 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0478 ,  H04B7/0617 ,  H04L25/0224

Abstract: In the present application, a method for reporting channel status information (CSI) for multi-antenna-based beamforming by a terminal in a wireless communication system is disclosed. Specifically, the method comprises the steps of: receiving reference signal configuration information including two or more reference signal resources through an upper layer; receiving CSI process information through the upper layer; receiving a reference signal from a base station on the basis of the reference signal configuration information; and calculating the CSI on the basis of the CSI process information and the received reference signal and reporting the CSI to the base station, wherein the CSI process information includes a reference signal type indicator indicating a mapping relationship between the reference signal configuration information and multiple antennas.

公开(公告)号：US20170302343A1

公开(公告)日：2017-10-19

申请号：US15508344

申请日：2015-08-06

Applicant: LG ELECTRONICS INC.

Inventor： Jinsoo CHOI ,  Kilbom LEE ,  Wookbong LEE ,  Hangyu CHO ,  Jiwon KANG

IPC: H04B7/04 ,  H04L27/26 ,  H04L5/00

CPC classification number: H04B7/0452 ,  H04L5/0007 ,  H04L27/26 ,  H04L27/2628

Abstract: A method and device for transmitting a training field in a wireless LAN are disclosed. The method for transmitting a training field in a wireless LAN may include the steps of generating PPDUs to be respectively transmitted to a plurality of STAs by an AP, and respectively transmitting the PPDUs by the AP to the plurality of STAS respectively through a plurality of sub bands on an OFDMA-based overlapped time resource, wherein the PPDU may include the training field, the training field may be generated based on a training sequence, and the training sequence may be designed so that a non-null tone for AGC is included in a plurality of tone that corresponds to the plurality of sub bands, respectively.

公开(公告)号：US20170222708A1

公开(公告)日：2017-08-03

申请号：US15515112

申请日：2015-10-07

Applicant: LG ELECTRONICS INC.

Inventor： Jiwon KANG ,  Kitae KIM ,  Kilbom LEE ,  Heejin KIM

IPC: H04B7/06 ,  H04W72/04

CPC classification number: H04B7/0639 ,  H04B7/0478 ,  H04B7/0617 ,  H04B7/0632 ,  H04W72/048 ,  H04W84/042

Abstract: Disclosed in the present application is a method for a receiving end to report feedback information to a transmitting end in a wireless communication system. Specifically, the method comprises receiving, from a base station, a plurality of reference signals corresponding to a two-dimensional antenna array; determining the number of horizontal antenna ports and the number of vertical antenna ports which reflect the mobility of a receiving end, by using the horizontal channel and the vertical channel estimated based on the plurality of reference signals; calculating a horizontal dimensional control matrix and a vertical dimensional control matrix by using the determined numbers of horizontal antenna ports and vertical antenna ports; determining and reporting a horizontal precoding matrix, a vertical precoding matrix, and a three-dimensional channel link by using the horizontal dimensional control matrix, the vertical dimensional control matrix, the horizontal channel and the vertical channel.

公开(公告)号：US20170207834A1

公开(公告)日：2017-07-20

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 ,  H04L5/00 ,  H04B7/06 ,  H04W72/04

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：US20170201309A1

公开(公告)日：2017-07-13

申请号：US15115562

申请日：2014-09-03

Applicant: LG ELECTRONICS INC.

Inventor： Jiwon KANG ,  Kitae KIM ,  Kilbom LEE

IPC: H04B7/06 ,  H04L5/00 ,  H04B7/04

CPC classification number: H04B7/0639 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/0478 ,  H04B7/0482 ,  H04B7/0486 ,  H04B7/0647 ,  H04B7/065 ,  H04B7/0695 ,  H04B7/088 ,  H04L1/0029 ,  H04L5/0048 ,  H04L25/0222 ,  H04W24/10

Abstract: A method for transmitting feedback information to a base station at a user equipment (UE) in a wireless communication system. The method includes receiving a pilot signal from the base station at a first time and a second time, selecting a first pre-coding matrix index corresponding to the first time and a second precoding matrix index corresponding to the second time from a predetermined codebook based on the pilot signal, and transmitting the feedback information including information about a variation value between the first precoding matrix index and the second precoding matrix index to the base station.

公开(公告)号：US20170163326A1

公开(公告)日：2017-06-08

申请号：US15325067

申请日：2015-06-30

Applicant: LG ELECTRONICS INC.

Inventor： Kitae KIM ,  Jiwon KANG ,  Kilbom LEE ,  Heejin KIM

IPC: 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.