公开(公告)号：US09843423B2

公开(公告)日：2017-12-12

申请号：US14902774

申请日：2014-06-25

Applicant: LG ELECTRONICS INC.

Inventor： Jiwon Kang ,  Kilbom Lee ,  Hyunsoo Ko ,  Jaehoon Chung

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

CPC classification number: H04L5/0048 ,  H04B7/0456 ,  H04B7/0617 ,  H04B7/0626 ,  H04W72/046

Abstract: A method for receiving a signal from a base station by a user equipment, using beamforming based on a massive antenna array of the base station in a wireless communication system is disclosed. The method includes configuring an effective antenna array in the massive antenna array, receiving a pilot signal corresponding to the effective antenna array from the base station, reporting channel state information for beamforming to the base station, using the pilot signal, and receiving a user equipment-specifically beamformed signal through the effective antenna array from the base station, wherein the effective antenna array is defined as one or more horizontal antenna ports and one or more vertical antenna ports.

公开(公告)号：US09831932B2

公开(公告)日：2017-11-28

申请号：US14888383

申请日：2014-04-30

Applicant: LG ELECTRONICS INC.

Inventor： Jiwon Kang ,  Kilbom Lee ,  Hyunsoo Ko ,  Jaehoon Chung

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

CPC classification number: H04B7/0617 ,  H04B7/063 ,  H04B7/0689 ,  H04B7/0691 ,  H04L5/0048

Abstract: Disclosed is a method for transmitting, by a terminal, feedback information to a network for partial beamforming based on a multi-antenna in a wireless communication system. Specifically, the method comprises: a step of receiving, from the network, reference signals corresponding to antenna sections included in the multi-antenna; a step of selecting one or more beamforming mode among beamforming modes included in a candidate beamforming mode set on the basis of the reference signals, and forming feedback information related to the selected one or more beamforming modes; and a step of transmitting the feedback information to the network, and the feedback information includes a pre-coding matrix index corresponding to at least one of the antenna sections and connection coefficient information for connecting the antenna sections.

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.

公开(公告)号：US09800314B2

公开(公告)日：2017-10-24

申请号：US15115562

申请日：2014-09-03

Applicant: LG ELECTRONICS INC.

Inventor： Jiwon Kang ,  Kitae Kim ,  Kilbom Lee

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

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 precoding 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：US09722686B2

公开(公告)日：2017-08-01

申请号：US15158064

申请日：2016-05-18

Applicant: LG ELECTRONICS INC.

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

IPC: G06F17/00 ,  H04B7/08 ,  H01Q21/28 ,  H01Q1/32 ,  H04W88/06

CPC classification number: H04B7/0808 ,  H01Q1/3275 ,  H01Q21/28 ,  H04B7/0404 ,  H04B7/0874 ,  H04W88/06

Abstract: The present document is for a wireless communication with reduced internal signaling burden in the distributed antenna system (DAS). In the proposed method, a user equipment (UE) receives signals, from the network, by multiple distributed unit (DUs) distributed within the UE, wherein the multiple DUs comprise one or more main DUs and one or more sub DUs; reports, by the sub DUs, first reception information of the signals to one of the main DUs; reports, by the one of the main DUs, second reception information of the signals to a central unit (CU) controlling the multiple DUs based on the first reception information of the signals; and determines, at the CU, which one or more DUs among the multiple DUs are to transfer the received signals to the CU based on the second reception information of the signals.

公开(公告)号：US20170195159A1

公开(公告)日：2017-07-06

申请号：US15325274

申请日：2015-06-30

Applicant: LG Electronics Inc.

Inventor： Kilbom Lee ,  Wookbong Lee ,  Jiwon Kang ,  Jinsoo Chol ,  Dongguk Lim ,  Hangyu Cho ,  Eunsung Park

IPC: H04L27/26 ,  H04L25/03 ,  H04L25/02 ,  H04L27/34 ,  H04L5/00

CPC classification number: H04L27/2675 ,  H04L5/0048 ,  H04L25/0224 ,  H04L25/03006 ,  H04L27/2613 ,  H04L27/3455

Abstract: Disclosed is a pilot sequence transmission method for transmitting additional information to a receiver by shifting a pilot signal on a frequency axis or a time axis and transmitting the shifted pilot sequence. In addition, disclosed is a pilot sequence identification method for acquiring additional information transmitted from the transmitter by analyzing the pilot sequence transmitted from a transmitter so as to calculate a shifting value.

公开(公告)号：US09525476B2

公开(公告)日：2016-12-20

申请号：US14902792

申请日：2014-06-24

Applicant: LG ELECTRONICS INC.

Inventor： Jiwon Kang ,  Kilbom Lee ,  Hyunsoo Ko ,  Jaehoon Chung

IPC: H04M1/00 ,  H04B7/06 ,  H01Q3/06 ,  H01Q1/24 ,  H01Q25/00 ,  H04B17/309

CPC classification number: H04B7/0691 ,  H01Q1/246 ,  H01Q3/06 ,  H01Q25/00 ,  H04B7/0617 ,  H04B7/0619 ,  H04B17/309

Abstract: A method for receiving a signal from a base station by a user equipment, using massive antenna array based beamforming of the base station in a wireless communication system is disclosed. The method includes receiving, from the base station, antenna shuffling information corresponding to a preferred antenna port set among a plurality of antenna ports included in the massive antenna array, measuring channel state information according to the antenna shuffling information and reporting the channel state information to the base station, and receiving, from the base station, a beamformed signal using the preferred antenna port set based on the channel state information, wherein the antenna shuffling information includes at least one of information about a start index of antenna ports included in the preferred antenna port set and information about a direction to which antenna port indexes are allocated.

Abstract translation: 公开了一种用于在无线通信系统中使用基站的基于基站的波束成形的用户设备从基站接收信号的方法。 该方法包括从基站接收与包括在海量天线阵列中的多个天线端口中设置的优选天线端口对应的天线混洗信息，根据天线混洗信息测量信道状态信息并将信道状态信息报告给 基站，并且使用基于信道状态信息的优选天线端口从基站接收波束形成的信号，其中天线混洗信息包括关于包括在优选的天线端口中的天线端口的起始索引的信息中的至少一个 天线端口集和有关分配天线端口索引的方向的信息。