公开(公告)号：US09900135B2

公开(公告)日：2018-02-20

申请号：US14910065

申请日：2014-02-21

Applicant: LG ELECTRONICS INC.

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

IPC: H04L5/00 ,  H04B7/26 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/06 ,  H04B7/024 ,  H04B7/04 ,  H04B7/0404 ,  H04B7/08

CPC classification number: H04L5/0048 ,  G07F9/00 ,  G07F11/38 ,  G07F11/50 ,  H04B7/024 ,  H04B7/0404 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0482 ,  H04B7/0691 ,  H04B7/0874 ,  H04B7/26

Abstract: The base station, receiving first pilot signals transmitted via each of multiple antennas of a user equipment (UE), selects one or more reference codebooks based on channel qualities of the received first pilot signals, and selects one or more sub-channels for each of the reference codebooks. Based on this, the base station determines one or more virtual channels, wherein each of the virtual channels comprises one reference codebook and the one or more sub channels selected for the one reference codebook, wherein the sub-channels are selected to minimum distance between corresponding virtual channel and corresponding reference codebook. And, the base station transmits antenna combining information to the UE, wherein the antenna combining information combines the multiple antennas of the UE into one or more antenna groups corresponding to the one or more virtual channels; and receive second pilot signals transmitted by the UE based on the antenna combining information.

公开(公告)号：US09871566B2

公开(公告)日：2018-01-16

申请号：US14905250

申请日：2014-02-21

Applicant: LG ELECTRONICS INC.

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

IPC: H04B7/0452 ,  H04B7/04 ,  H04L5/00 ,  H04B7/0413

CPC classification number: H04B7/0452 ,  H04B7/0413 ,  H04B7/0421 ,  H04L5/0016 ,  H04L5/0048

Abstract: Grouping based reference signal transmission scheme for massive MIMO is disclosed. UEs are grouped and each UE group receives information on a sequence used for the uplink reference signal from a base station. The information is determined to assign orthogonal sequences to UEs within a UE group considering at least one or more of a number of orthogonal sequences, a number of the UEs within the UE group, amount of information to be transmitted, channel condition between the base station and each UE, and a number of sequences assigned to each UE of the UEs.

公开(公告)号：US09866298B2

公开(公告)日：2018-01-09

申请号：US15308214

申请日：2015-05-13

Applicant: LG ELECTRONICS INC.

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

IPC: H04B7/04 ,  H04B7/08 ,  H04B7/24 ,  H04B7/06 ,  H04B17/24

CPC classification number: H04B7/0486 ,  H04B7/04 ,  H04B7/0632 ,  H04B7/08 ,  H04B17/24

Abstract: A parameter determination method and a MIMO receiver are disclosed, wherein the parameter determination method estimates a channel correlation with respect to a plurality of REs using information about channels of the plurality of REs included in a resource region allocated by a MIMO transmitter; determines a downlink signal rank taking account of the channel correlation; and transmits information about the determined rank to the MIMO transmitter.

公开(公告)号：US09853704B2

公开(公告)日：2017-12-26

申请号：US14889389

申请日：2014-04-30

Applicant: LG ELECTRONICS INC.

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

IPC: H04B7/06

CPC classification number: H04B7/0617 ,  H04B7/0619 ,  H04B7/0621 ,  H04B7/0626 ,  H04B7/0639

Abstract: Discloses is a method in which a user equipment (UE) reports channel state information to an evolved Node B (eNB) for beamforming based on multiple antennas in a wireless communication system. Specifically, the method comprises the steps of: receiving information on a plurality of reference signal resources from the eNB; generating channel state information containing information related to one preferred precoder to be applied to the plurality of reference signal resources in common and information related to one linking precoder for connecting the plurality of reference signal resources; and reporting the channel state information to the eNB, wherein the multiple antennas are partitioned into sections of row or column units and the plurality of reference signal resources correspond to the sections.

公开(公告)号：US09825687B2

公开(公告)日：2017-11-21

申请号：US15033827

申请日：2014-05-02

Applicant: LG ELECTRONICS INC.

Inventor： Kitae Kim ,  Jaehoon Chung ,  Jiwon Kang ,  Kwangseok Noh ,  Kukheon Choi ,  Hyunsoo Ko ,  Jinmin Kim

IPC: H04B7/06 ,  H04B17/12

CPC classification number: H04B7/0671 ,  H04B7/0617 ,  H04B17/12

Abstract: In this disclosure, methods for pre-compensation of the phase shifting error, and apparatuses for the same are disclosed. In one example, a device performs precoding of a digital signal, while acquiring information on an error caused by a phase shifting of the precoding. Then, the device performs phase compensation on the digital signal based on the acquired information. Here, the phase compensation may compensate different amount of phase based on an amount of the phase shifting of the precoding. This phase compensated-digital signal is converted to an analog signal, and is transmitted to a receiver.

公开(公告)号：US09819407B2

公开(公告)日：2017-11-14

申请号：US15034020

申请日：2014-04-30

Applicant: LG ELECTRONICS INC.

Inventor： Kitae Kim ,  Jaehoon Chung ,  Jiwon Kang ,  Kwangseok Noh ,  Kukheon Choi ,  Hyunsoo Ko ,  Jinmin Kim

IPC: H04L1/02 ,  H04B7/06 ,  H04L25/02 ,  H04B7/04 ,  H04B17/11 ,  H04L27/26 ,  H04L25/49 ,  H04L25/03

CPC classification number: H04B7/0656 ,  H04B7/046 ,  H04B7/0617 ,  H04B7/0619 ,  H04B17/11 ,  H04L25/0224 ,  H04L25/03343 ,  H04L25/49 ,  H04L27/2634 ,  H04L27/2657

Abstract: In this disclosure, methods for pre-compensation of the phase shifting error, and apparatuses for the same are disclosed. In one example, a device performs precoding of a digital signal, while acquiring information on an error caused by a phase shifting of the precoding. Then, the device performs phase compensation on the digital signal based on the acquired information. This phase compensated-digital signal is converted to an analog signal, and is transmitted to a receiver.

公开(公告)号：US09712222B2

公开(公告)日：2017-07-18

申请号：US14779183

申请日：2014-01-29

Applicant: LG ELECTRONICS INC.

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

IPC: H04W4/00 ,  H04B7/06 ,  H04B7/0456 ,  H04B7/04

CPC classification number: H04B7/0617 ,  H04B7/0456 ,  H04B7/0469 ,  H04B7/0619 ,  H04B7/0639 ,  H04B7/0691

Abstract: A method for transmitting feedback information for fractional beamforming using a massive antenna array from a User Equipment (UE) to a Base Station (BS) in a wireless communication system is disclosed. The method includes receiving information about a plurality of Reference Signal (RS) resources from the BS; selecting at least one of a sub-precoder for at least one RS resources, and one linking precoder for linking the RS resources, based on a preset codebook; and reporting information about the selected precoder to the BS. The selected precoder is one precoding matrix of precoding matrices included in the codebook or a permuted form of the one precoding matrix, and the information about the selected precoder includes an index and permutation information of the one precoding matrix.

公开(公告)号：US09667329B2

公开(公告)日：2017-05-30

申请号：US14062703

申请日：2013-10-24

Applicant: LG ELECTRONICS INC.

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

IPC: H04B7/02 ,  H04L1/02 ,  H04B7/06 ,  H04B7/0413

CPC classification number: H04B7/0613 ,  H04B7/0413

Abstract: A communication apparatus in a multi-antenna wireless communication system is disclosed. In detail, the communication apparatus includes a first processor for processing a baseband signal defined as a first virtual antenna group, a second processor for mapping a signal defined as a second virtual antenna group and the baseband signal defined as the first virtual antenna group in order to remove coupling between antennas, and an antenna module for mapping the signal defined as the second virtual antenna group and a signal defined as a multiple physical antenna group.

公开(公告)号：US09503169B1

公开(公告)日：2016-11-22

申请号：US14924494

申请日：2015-10-27

Applicant: LG ELECTRONICS INC. ,  INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY

Inventor： Kilbom Lee ,  Hyunsu Cha ,  Dongku Kim ,  Jiwon Kang

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

CPC classification number: H04B7/0604 ,  H04B7/02 ,  H04B7/0669 ,  H04B7/0697 ,  H04L1/0618 ,  H04L1/0668

Abstract: A method for transmitting a signal to a receiver by a transmitter in a multiple input multiple output (MIMO) wireless communication system is disclosed. A method for transmitting a signal to a receiver by a transmitter in a multiple input multiple output (MIMO) wireless communication system includes: generating at least one bit stream by channel-coding data; allocating a first bit stream having a specific size from among the bit streams to an antenna sequence codeword according to an antenna sequence codebook; and transmitting the remaining second bit stream from among the bit streams to the receiver according to the order of antenna pairs indicated by the allocated antenna sequence codeword, wherein the antenna sequence codebook indicates a mapping relationship between the first bit stream and the antenna sequence codeword, and the antenna sequence codeword is defined by two timeslots and two antenna indexes.

Abstract translation: 公开了一种在多输入多输出（MIMO）无线通信系统中由发射机向接收机发送信号的方法。 一种用于在多输入多输出（MIMO）无线通信系统中由发射机向接收机发送信号的方法包括：通过信道编码数据生成至少一个比特流; 根据天线序列码本，从比特流中分配具有特定大小的第一比特流到天线序列码字; 以及根据由所分配的天线序列码字指示的天线对的顺序将剩余的第二比特流从比特流中传送到接收机，其中天线序列码本指示第一比特流和天线序列码字之间的映射关系， 并且天线序列码字由两个时隙和两个天线索引定义。

公开(公告)号：US09484992B2

公开(公告)日：2016-11-01

申请号：US14895140

申请日：2014-02-28

Applicant: LG ELECTRONICS INC. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jiwon Kang ,  Jaehoon Chung ,  Sae-Young Chung ,  Wonseok Jeon ,  Hyunsoo Ko

IPC: H04B1/04 ,  H04B7/04 ,  H04B7/10 ,  H01Q21/24

CPC classification number: H04B7/0408 ,  H01Q21/245 ,  H04B7/10

Abstract: A method and apparatus for transmitting a signal using a polarimetric antenna to a reception apparatus in a wireless communication system are disclosed. The method includes generating a first matrix using a radiation pattern of the polarimetric antenna, calculating a second matrix that maximizes channel capacity, determining an antenna virtualization matrix by Singular Value Decomposition (SVD) based on the first and second matrices, and transmitting a signal to the reception apparatus using the antenna virtualization matrix.

Abstract translation: 公开了一种使用偏振天线向无线通信系统中的接收装置发送信号的方法和装置。 该方法包括使用偏振天线的辐射图来生成第一矩阵，计算使信道容量最大化的第二矩阵，基于第一和第二矩阵通过奇异值分解（SVD）确定天线虚拟化矩阵，并将信号发送到 使用天线虚拟化矩阵的接收装置。