公开(公告)号：US20130267266A1

公开(公告)日：2013-10-10

申请号：US13845760

申请日：2013-03-18

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jae Hyun PARK ,  Sung Jin YOO ,  Myung Sun SONG ,  Byung Jang JEONG ,  Jae Ick CHOI

IPC: H04B7/04

CPC classification number: H04B7/0456

Abstract: A communication method of a base station and a terminal based on interference alignment in a multi-cell multi-user multiple-input multiple-output (MIMO) interference channel and a method and apparatus of communication using interference alignment and block successive interference pre-cancellation in a multi-user MIMO interference channel. The base station may determine a precoding matrix to maximize a signal to interference and noise ratio (SINR) and a signal to leakage and noise ratio (SLNR) in the interference channel, and a terminal communicating with the base station may determine a decoding matrix to align interference. The transmitter including a multicell interference channel may calculate a rotation matrix for interference alignment, identify effective symbol vectors using the rotation matrix, and generate a transmit signal of a target transmitter to pre-cancel interference corresponding to a transmit signal of a neighboring transmitter.

Abstract translation: 基于多小区多用户多输入多输出（MIMO）干扰信道中的干扰对准的基站和终端的通信方法以及使用干扰对准和块连续干扰预取消的通信的方法和装置 在多用户MIMO干扰信道中。 基站可以确定预编码矩阵以使干扰信道中的信号与干扰和噪声比（SINR）以及信号与泄漏和噪声比（SLNR）最大化，并且与基站通信的终端可以确定解码矩阵 对准干扰。 包括多小区干扰信道的发射机可以计算用于干扰对准的旋转矩阵，使用旋转矩阵识别有效符号向量，并且生成目标发射机的发射信号以预先抵消与相邻发射机的发射信号相对应的干扰。

公开(公告)号：US20230021567A1

公开(公告)日：2023-01-26

申请号：US17866727

申请日：2022-07-18

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sung Jin YOO ,  Hyung Ju KIM ,  Myung Sun SONG ,  Byung Jang JEONG

IPC: G01S7/02 ,  G01S13/931

Abstract: Disclosed is a radar detection assistant apparatus for increasing detection accuracy when detecting an object using a radar detection device. The radar detection assistant apparatus includes a radar signal receiver for adjusting a radar candidate signal received through a reception antenna to a predetermined magnitude and filtering out a signal other than the radar candidate signal, a radar signal analyzer for receiving the radar candidate signal from the radar signal receiver and determining whether or not the radar candidate signal is a preset radar signal, a radar signal production controller for generating a control signal for an assistant apparatus production signal or an assistant apparatus reproduction signal on the basis of at least one of pieces of information on a type, a bandwidth, and a period of the radar candidate signal received from the radar signal analyzer, and a radar signal producer.

公开(公告)号：US20170347312A1

公开(公告)日：2017-11-30

申请号：US15529013

申请日：2015-11-20

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hyun Duk KANG ,  Gwang Zeen KO ,  Igor KIM ,  Myung Sun SONG

IPC: H04W48/16 ,  H04W88/10 ,  H04W28/16 ,  H04W84/12

CPC classification number: H04W48/16 ,  H04W28/16 ,  H04W84/12 ,  H04W88/10

Abstract: The present invention relates to a method and a system for discovering an adjacent access point between multi-band wireless LAN access points, and to a method and a system for discovering an adjacent neighboring access point between access points in order to solve an interference problem between the access points in a wireless LAN using multi-bands.

公开(公告)号：US20170272280A1

公开(公告)日：2017-09-21

申请号：US15459749

申请日：2017-03-15

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Kwang Seon KIM ,  Min Soo KANG ,  Bong Su KIM ,  Myung Sun SONG ,  Woo Jin BYUN

IPC: H04L25/02 ,  H04W24/02 ,  H04B7/0413

CPC classification number: H04B7/0413 ,  H04B7/0848 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0224

Abstract: The present disclosure relates to a wireless communication apparatus capable of increasing throughput using MIMO in an LOS environment and a method for the same. A wireless communication apparatus based on the LOS-MIMO technique may comprise a multi-link configuration unit, a frequency response correction unit, a signal compensation unit, and a feedback unit. In the apparatus, an additional LOS-MIMO equalizer is used at the front of an LOS-MIMO estimator and a coding unit in order to compensate in-band frequency characteristics of frequency response characteristics estimated by the LOS-MIMO estimator and a signal channel estimator, whereby the LOS-MIMO estimation performance can be remarkably enhanced. Also, precise separation of multiplexed signals through the above-described LOS equalizer can make it possible to increase transmission capacity by using the LOS-MIMO which can be applied to high-order mode (e.g., over 16 quadrature amplitude modulation (QAM)) digital communications.

公开(公告)号：US20150373717A1

公开(公告)日：2015-12-24

申请号：US14744821

申请日：2015-06-19

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jin Hyung OH ,  Bang Chul JUNG ,  Hu JIN ,  Myung Sun SONG

IPC: H04W72/04 ,  H04W24/08

CPC classification number: H04W24/08 ,  H04B7/0695 ,  H04W24/02 ,  H04W74/006 ,  H04W74/0833

Abstract: Provided is a frame transmission method of interference alignment (IA) and controlling, the method including calculating a channel matrix of a basic service set (BSS) by measuring channel information between an access point and a user terminal, performing singular value decomposition (SVD) based on the calculated channel matrix, selecting a beamforming vector in consideration of an interference amount associated with another access point based on the SVD performed by the channel matrix, and calculating a leakage interference (LIF) value based on the selected beamforming vector.

Abstract translation: 提供了一种干扰对准（IA）的帧传输方法并且控制该方法，包括通过测量接入点和用户终端之间的信道信息来计算基本业务集（BSS）的信道矩阵，执行奇异值分解（SVD） 基于所计算的信道矩阵，基于由信道矩阵执行的SVD，考虑与另一接入点相关联的干扰量来选择波束成形向量，以及基于所选择的波束成形向量计算泄漏干扰（LIF）值。

公开(公告)号：US20150245359A1

公开(公告)日：2015-08-27

申请号：US14445439

申请日：2014-07-29

Applicant: Electronics and Telecommunications Research Institute

Inventor： Igor KIM ,  Gwang Zeen KO ,  Jin Hyung OH ,  Hyun Duk KANG ,  Myung Sun SONG

IPC: H04W72/06 ,  H04W24/10 ,  H04L1/00 ,  H04W72/08

CPC classification number: H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0034 ,  H04W24/10 ,  H04W28/22

Abstract: A method and apparatus of selecting a transmission rate in a wireless transmission system are provided. The method of selecting a transmission rate by a transmission rate selecting apparatus may comprise assigning a weight to each of criteria for selecting a transmission rate per service class, calculating a score for each transmission rate per service class using statistics information collected for a plurality of transmission rates based on the weight-assigned criteria, and selecting a transmission rate for a service class based on the calculated score.

Abstract translation: 提供了一种在无线传输系统中选择传输速率的方法和装置。 由传输速率选择装置选择传输速率的方法可以包括：为每个服务等级选择传输速率的标准分配权重，使用针对多个传输收集的统计信息来计算每个业务类别的每个传输速率的得分 基于权重分配标准的费率，以及基于所计算的分数来选择服务等级的传输速率。

公开(公告)号：US20150207551A1

公开(公告)日：2015-07-23

申请号：US14327750

申请日：2014-07-10

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Min Soo KANG ,  Kwang Seon KIM ,  Bong Su KIM ,  Woo Jin BYUN ,  Jong Soo LIM ,  Myung Sun SONG ,  Jae Ick CHOI

IPC: H04B7/04 ,  H04B7/08 ,  H04L25/02 ,  H04B7/06

CPC classification number: H04L25/0204 ,  H04B7/0413 ,  H04B7/0608 ,  H04B7/10

Abstract: A spatial modulation method using a polarization and an apparatus using the same are provided. A spatial modulation method by a transmitting apparatus in a wireless communication system may comprise selecting an antenna to send data among transmit antennas arranged to have different polarization angles using a predetermined bit of input data based on indexes of the transmit antenna and mapping remaining bits of the input data to a preset constellation and transmitting the remaining bits of the mapped input data through the selected antenna.

Abstract translation: 提供使用偏振的空间调制方法和使用其的装置。 通过无线通信系统中的发送装置的空间调制方法可以包括：基于发射天线的索引，使用预定位的输入数据选择天线以发送天线之间的数据，以发送具有不同偏振角的数据， 将数据输入到预设星座，并通过所选择的天线发送映射的输入数据的剩余比特。

公开(公告)号：US20150188733A1

公开(公告)日：2015-07-02

申请号：US14272973

申请日：2014-05-08

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jinhyung OH ,  Gwangzeen KO ,  Igor KIM ,  Myung Sun SONG ,  Hyun Ho LEE ,  Myeong Jin KIM ,  Young Chai KO

IPC: H04L25/03 ,  H04L25/02

CPC classification number: H04L25/0391 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0626 ,  H04B7/0632 ,  H04L25/0202 ,  H04L25/021 ,  H04L25/0242 ,  H04L25/03955

Abstract: Disclosed is a method for removing signal interference in a MIMO-based interference removing apparatus including transmitting a reference signal to at least one receiver; if channel information is estimated by the receiver, receiving the estimated channel information from the receiver as a feedback signal; and producing transmission pre-coding matrix, beam forming matrix, and weighted matrix using the received channel information. Further, the method includes transmitting information containing the transmission pre-coding matrix, the beam forming matrix, and the weighted matrix by including them in a pilot signal to the receiver, and the MIMO-based interference removing apparatus comprises at least one transmitter.

Abstract translation: 公开了一种在基于MIMO的干扰去除装置中消除信号干扰的方法，包括：向至少一个接收机发送参考信号; 如果接收机估计信道信息，则从接收机接收所估计的信道信息作为反馈信号; 并使用所接收的信道信息产生传输预编码矩阵，波束形成矩阵和加权矩阵。 此外，该方法包括通过将包含发送预编码矩阵，波束形成矩阵和加权矩阵的信息包括在导频信号中而发送到接收机，并且基于MIMO的干扰去除装置包括至少一个发射机。

公开(公告)号：US20150181561A1

公开(公告)日：2015-06-25

申请号：US14577219

申请日：2014-12-19

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jin Hyung OH ,  Gwang Zeen KO ,  Hyun Duk KANG ,  Igor KIM ,  Myung Sun SONG

IPC: H04W72/04

CPC classification number: H04W80/02 ,  H04L1/1861 ,  H04W28/06 ,  H04W72/00 ,  H04W84/12

Abstract: Provided are a frame transmission method performed in an access point (AP), a frame reception method performed in a terminal, and an AP. The frame transmission method performed in an AP includes acquiring a channel for transmitting a first data unit of a first terminal, when a data unit to be transmitted to at least one terminal other than the first terminal is in the AP, generating a physical layer convergence procedure (PLCP) protocol data unit (PPDU) including the first data unit and the data unit to be transmitted to the at least one terminal, and transmitting the PPDU to the first terminal and the at least one terminal. Accordingly, it is possible to improve the performance of a wireless local area network (WLAN).

Abstract translation: 提供了在接入点（AP）中执行的帧发送方法，在终端中执行的帧接收方法和AP。 在AP中执行的帧发送方法包括：当要发送到除了第一终端之外的至少一个终端的数据单元在AP中时，获取用于发送第一终端的第一数据单元的信道，生成物理层收敛 程序（PLCP）协议数据单元（PPDU），包括要发送到至少一个终端的第一数据单元和数据单元，以及将PPDU发送到第一终端和至少一个终端。 因此，可以提高无线局域网（WLAN）的性能。

公开(公告)号：US20150139031A1

公开(公告)日：2015-05-21

申请号：US14548826

申请日：2014-11-20

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hyun Duk KANG ,  Gwang Zeen KO ,  Igor KIM ,  Myung Sun SONG ,  Jin Hyung OH

IPC: H04W48/16 ,  H04W8/00

CPC classification number: H04W16/10 ,  H04W84/12 ,  H04W92/20

Abstract: Disclosed is a discovery method of neighbor node in a wireless local area network (LAN). The discovery method includes performing a scanning procedure, performing an authentication procedure with a first terminal detected through the scanning procedure, performing an association procedure with the first terminal in which the authentication procedure has been performed, acquiring, from the first terminal, a scanning result of a scanning procedure having been performed in the first terminal, and generating a first AP list based on a scanning result of a scanning procedure having been performed in the first AP and the scanning result of the scanning procedure having been performed in the first terminal Therefore, interference problems between neighbor access points (APs) may be solve.

Abstract translation: 公开了无线局域网（LAN）中的邻居节点的发现方法。 该发现方法包括执行扫描过程，对通过扫描过程检测到的第一终端执行认证过程，对已执行认证过程的第一终端执行关联过程，从第一终端获取扫描结果 已经在第一终端中执行了扫描过程，并且基于在第一AP中执行的扫描过程的扫描结果和在第一终端中执行的扫描过程的扫描结果来生成第一AP列表。因此 可以解决邻居接入点（AP）之间的干扰问题。