公开(公告)号：US08406775B2

公开(公告)日：2013-03-26

申请号：US11914922

申请日：2005-12-13

申请人： Jae-Young Ahn ,  Yong-Soo Cho ,  Hyun-Soo Ko

发明人： Jae-Young Ahn ,  Yong-Soo Cho ,  Hyun-Soo Ko

IPC分类号： H04W40/00

CPC分类号： H04B7/0491 ,  H04B7/0408 ,  H04B7/0617 ,  H04L5/023 ,  H04W16/10 ,  H04W16/24 ,  H04W16/28

摘要： A method for selecting beams, a switched beam operation method during an initial synchronization process, and an initial synchronization method using it are provided for selecting beams to minimize the probability of occurrence of interferences between cells by considering a distance between beams within neighboring sectors during an initial synchronization process using switched beams, in an orthogonal frequency division multiplexing (OFDM) cellular system employing a smart antenna. The inventive method comprises the steps of dividing each cell into sectors, and counting the number of fixed beams per cell, and selecting a switched beam for minimizing probability of interference, from fixed beams presenting in a corresponding sector, based on distances between a selected beam and beams of all of adjacent cells and the number of cases to be selected in a subsequent time slot, according to the counted number of the fixed beams existing in each sector.

摘要翻译： 提供一种用于选择波束的方法，初始同步过程中的切换波束操作方法以及使用该方法的初始同步方法，用于选择波束以通过考虑在相邻扇区内的波束之间的距离来最小化小区之间干扰发生的概率 在使用智能天线的正交频分复用（OFDM）蜂窝系统中使用切换波束的初始同步过程。 本发明的方法包括以下步骤：将每个小区划分成扇区，并且对每个小区的固定波束数进行计数，并且根据所选择的波束之间的距离，选择用于最小化相应扇区中呈现的固定波束的干扰概率的切换波束 根据存在于每个扇区中的固定光束的数目，所有相邻小区的波束和后续时隙中的选择的个数。

公开(公告)号：US20090116565A1

公开(公告)日：2009-05-07

申请号：US11914922

申请日：2005-12-13

申请人： Jae Young Ahn ,  Yong-Soo Cho ,  Hyun-Soo Ko

发明人： Jae Young Ahn ,  Yong-Soo Cho ,  Hyun-Soo Ko

IPC分类号： H04L27/28 ,  H04L7/00

CPC分类号： H04B7/0491 ,  H04B7/0408 ,  H04B7/0617 ,  H04L5/023 ,  H04W16/10 ,  H04W16/24 ,  H04W16/28

摘要： A method for selecting beams, a switched beam operation method during an initial synchronization process, and an initial synchronization method using it are provided for selecting beams to minimize the probability of occurrence of interferences between cells by considering a distance between beams within neighboring sectors during an initial synchronization process using switched beams, in an orthogonal frequency division multiplexing (OFDM) cellular system employing a smart antenna. The inventive method comprises the steps of dividing each cell into sectors, and counting the number of fixed beams per cell, and selecting a switched beam for minimizing probability of interference, from fixed beams presenting in a corresponding sector, based on distances between a selected beam and beams of all of adjacent cells and the number of cases to be selected in a subsequent time slot, according to the counted number of the fixed beams existing in each sector.

摘要翻译： 提供一种用于选择波束的方法，初始同步过程中的切换波束操作方法以及使用该方法的初始同步方法，用于选择波束以通过考虑在相邻扇区内的波束之间的距离来最小化小区之间干扰发生的概率 在使用智能天线的正交频分复用（OFDM）蜂窝系统中使用切换波束的初始同步过程。 本发明的方法包括以下步骤：将每个小区划分成扇区，并且对每个小区的固定波束数进行计数，并且根据所选择的波束之间的距离，选择用于最小化相应扇区中呈现的固定波束的干扰概率的切换波束 根据存在于每个扇区中的固定光束的数目，所有相邻小区的波束和后续时隙中的选择的个数。

公开(公告)号：US07675989B2

公开(公告)日：2010-03-09

申请号：US11303484

申请日：2005-12-16

申请人： Jae-Young Ahn ,  Yong-Soo Cho ,  Dong-Han Kim

发明人： Jae-Young Ahn ,  Yong-Soo Cho ,  Dong-Han Kim

IPC分类号： H04B7/02

CPC分类号： H04L27/2657 ,  H04B7/0851 ,  H04L27/2675

摘要： An apparatus for estimating an antenna weight vector in an Orthogonal Frequency Division Multiple Access System (OFDMA) having a smart antenna. The apparatus includes receiving and storing training symbols in the time domain transmitted to estimate an antenna weight vector during a training symbol transmission interval; estimating carrier frequency offsets using training symbols in the frequency domain that are obtained by performing a Fast Fourier Transformation (FFT) algorithm with respect to the training symbols received during the training symbol transmission interval; compensating the stored training symbols in the time domain based on the estimated carrier frequency offsets; and estimating an antenna weight vector using training symbols in the frequency domain that are obtained by applying an FFT algorithm with respect to the training symbols in the time domain derived by compensating the carrier frequency offsets during the training symbol transmission interval.

摘要翻译： 一种用于估计具有智能天线的正交频分多址系统（OFDMA）中的天线权重向量的装置。 所述装置包括在训练符号传输间隔期间在所发送的时域中接收和存储训练符号以估计天线权重向量; 使用通过针对在训练符号传输间隔期间接收到的训练符号执行快速傅里叶变换（FFT）算法获得的频域中的训练符号来估计载波频率偏移; 基于估计的载波频率偏移补偿在时域中存储的训练符号; 以及使用通过在训练符号发送间隔期间通过补偿载波频率偏移导出的时域中的训练符号应用FFT算法获得的频域中的训练符号来估计天线权重向量。

公开(公告)号：US07848218B2

公开(公告)日：2010-12-07

申请号：US12064206

申请日：2006-08-18

申请人： Hyo-Jin Lee ,  Jae-Young Ahn ,  Yong-Soo Cho ,  Kyu-Jin Lee ,  Kyung-Won Park

发明人： Hyo-Jin Lee ,  Jae-Young Ahn ,  Yong-Soo Cho ,  Kyu-Jin Lee ,  Kyung-Won Park

IPC分类号： H04J11/00

CPC分类号： H04B7/068 ,  H04L25/03159 ,  H04L25/03343 ,  H04L27/2602 ,  H04L2025/03414 ,  H04L2025/03522 ,  H04L2025/03605

摘要： Provided are a virtual multi-antenna method for an orthogonal frequency division multiplexing (OFDM) system and an OFDM-based cellular system. The virtual multi-antenna method includes grouping sub-carriers in a frequency domain of an OFDM symbol and generating at least one group including G sub-carriers; and regarding the G sub-carriers included in the at least one group as multiple channels used in a multi-antenna technique and virtually applying the multi-antenna technique to the transmission and reception of the OFDM symbol. The virtual multi-antenna method can effectively reduce an interference signal and obtain the effects of a spatial division multiple access (SDMA) technique without physically using multiple antennas.

摘要翻译： 提供了一种用于正交频分复用（OFDM）系统和基于OFDM的蜂窝系统的虚拟多天线方法。 虚拟多天线方法包括在OFDM符号的频域中分组子载波并且生成包括G个子载波的至少一个组; 并且将包括在至少一个组中的G个子载波作为在多天线技术中使用的多个信道，并将多天线技术虚拟地应用于OFDM符号的发送和接收。 虚拟多天线方法可以有效地减少干扰信号并获得空分多址（SDMA）技术的效果，而无需物理上使用多个天线。

公开(公告)号：US20060233270A1

公开(公告)日：2006-10-19

申请号：US11303484

申请日：2005-12-16

申请人： Jae-Young Ahn ,  Yong-Soo Cho ,  Dong-Han Kim

发明人： Jae-Young Ahn ,  Yong-Soo Cho ,  Dong-Han Kim

IPC分类号： H04K1/10

CPC分类号： H04L27/2657 ,  H04B7/0851 ,  H04L27/2675

摘要： Provided are a method and apparatus for uplink carrier frequency synchronization and antenna weight vector estimation in an Orthogonal Frequency Division Multiple Access System (OFDMA) having a smart antenna. The inventive method comprises the steps of receiving and storing training symbols in the time domain transmitted to estimate an antenna weight vector during a training symbol transmission interval; estimating carrier frequency offsets using training symbols in the frequency domain that are obtained by performing a Fast Fourier Transformation (FFT) algorithm with respect to the training symbols received during the training symbol transmission interval; compensating the stored training symbols in the time domain based on the estimated carrier frequency offsets; and estimating an antenna weight vector using training symbols in the frequency domain that are obtained by applying an FFT algorithm with respect to the training symbols in the time domain derived by compensating the carrier frequency offsets during the training symbol transmission interval.

摘要翻译： 提供了一种具有智能天线的正交频分多址系统（OFDMA）中的上行链路载波频率同步和天线权重向量估计的方法和装置。 本发明的方法包括以下步骤：在训练符号发送间隔期间，在发送的时域中接收和存储训练符号以估计天线权重向量; 使用通过针对在训练符号传输间隔期间接收到的训练符号执行快速傅里叶变换（FFT）算法获得的频域中的训练符号来估计载波频率偏移; 基于估计的载波频率偏移补偿在时域中存储的训练符号; 以及使用通过在训练符号发送间隔期间通过补偿载波频率偏移导出的时域中的训练符号应用FFT算法获得的频域中的训练符号来估计天线权重向量。

公开(公告)号：US08432986B2

公开(公告)日：2013-04-30

申请号：US12004112

申请日：2007-12-20

申请人： Joo-Hyun Lee ,  Sang-Boh Yun ,  Yong-Soo Cho ,  Jae-Kwon Kim ,  Tae-Ho Im

发明人： Joo-Hyun Lee ,  Sang-Boh Yun ,  Yong-Soo Cho ,  Jae-Kwon Kim ,  Tae-Ho Im

IPC分类号： H04B7/02

CPC分类号： H04L25/03171 ,  H04B7/0854 ,  H04L25/067 ,  H04L27/38 ,  H04L2025/03426

摘要： An apparatus and method for receiving signals in a multiple-input, multiple-output (MIMO) wireless communication system is provided. A receiving end using as many as N Receive (Rx) antennas includes a first detector, as many as (N−2) nth detectors, and an Nth detector. A signal detection technique of the present invention has a low complexity and a throughput similar to that of a Maximum Likelihood (ML) scheme in a Multiple-Input Multiple-Output (MIMO) wireless communication system using a Spatial Multiplexing (SM) scheme.

摘要翻译： 提供了一种用于在多输入多输出（MIMO）无线通信系统中接收信号的装置和方法。 使用多达N个接收（Rx）天线的接收端包括第一检测器，多达（N-2）个第n个检测器和第N个检测器。 本发明的信号检测技术具有与使用空间复用（SM）方案的多输入多输出（MIMO）无线通信系统中的最大似然（ML）方案相似的低复杂度和吞吐量。

公开(公告)号：US20110084278A1

公开(公告)日：2011-04-14

申请号：US12576591

申请日：2009-10-09

申请人： Yong-Soo Cho ,  Kyo-Ho Moon ,  Hoon Choi

发明人： Yong-Soo Cho ,  Kyo-Ho Moon ,  Hoon Choi

IPC分类号： H01L33/00 ,  H01L21/336

CPC分类号： H01L29/4908 ,  H01L27/1214 ,  H01L29/78648

摘要： The present invention relates to a thin-film transistor in a liquid crystal display device and a method of fabricating the same, and the thin-film transistor may be configured by including a first gate electrode formed on an insulating substrate; a first gate insulation film formed on the insulating substrate including the first gate electrode; an active layer formed on the first gate insulation film; source/drain electrodes formed on the active layer and arranged at both sides of the first gate electrode; a second gate insulation film formed on the active layer and the first gate insulation film including the source/drain electrodes and provided with a contact hole for exposing part of the drain electrode; a second gate electrode overlapped with the first gate electrode on the second gate insulation film; and a pixel electrode electrically connected to the drain electrode through the contact hole.

摘要翻译： 液晶显示装置中的薄膜晶体管及其制造方法技术领域本发明涉及液晶显示装置中的薄膜晶体管及其制造方法，薄膜晶体管可以通过包括形成在绝缘基板上的第一栅电极构成， 形成在包括所述第一栅极的所述绝缘基板上的第一栅极绝缘膜; 形成在第一栅极绝缘膜上的有源层; 源极/漏电极，形成在有源层上，并布置在第一栅电极的两侧; 形成在所述有源层上的第二栅极绝缘膜和包括所述源极/漏极的所述第一栅极绝缘膜，并且设置有用于使所述漏极的一部分露出的接触孔; 在所述第二栅极绝缘膜上与所述第一栅电极重叠的第二栅电极; 以及通过接触孔与漏电极电连接的像素电极。

公开(公告)号：US20080152032A1

公开(公告)日：2008-06-26

申请号：US12004112

申请日：2007-12-20

申请人： Joo-Hyun Lee ,  Sang-Boh Yun ,  Yong-Soo Cho ,  Jae-Kwon Kim ,  Tae-Ho Im

发明人： Joo-Hyun Lee ,  Sang-Boh Yun ,  Yong-Soo Cho ,  Jae-Kwon Kim ,  Tae-Ho Im

IPC分类号： H04L27/28

CPC分类号： H04L25/03171 ,  H04B7/0854 ,  H04L25/067 ,  H04L27/38 ,  H04L2025/03426

摘要： An apparatus and method for receiving signals in a multiple-input, multiple-output (MIMO) wireless communication system is provided. A receiving end using as many as N Receive (Rx) antennas includes a first detector, as many as (N-2) nth detectors, and an Nth detector. A signal detection technique of the present invention has a low complexity and a throughput similar to that of a Maximum Likelihood (ML) scheme in a Multiple-Input Multiple-Output (MIMO) wireless communication system using a Spatial Multiplexing (SM) scheme.

摘要翻译： 提供了一种用于在多输入多输出（MIMO）无线通信系统中接收信号的装置和方法。 使用多达N个接收（Rx）天线的接收端包括第一检测器，多达（N-2）个第n个检测器和第N个检测器。 本发明的信号检测技术具有与使用空间复用（SM）方案的多输入多输出（MIMO）无线通信系统中的最大似然（ML）方案相似的低复杂度和吞吐量。

公开(公告)号：US08660563B2

公开(公告)日：2014-02-25

申请号：US12316727

申请日：2008-12-16

申请人： Joo-Hyun Lee ,  Jin-Ghoo Choi ,  Sang-Boh Yun ,  Jong-Ho Lee ,  Yong-Soo Cho ,  Jae-Kwon Kim ,  Yeong-Jun Kim ,  Kyung-Soo Woo ,  Hyun-Il Yoo

发明人： Joo-Hyun Lee ,  Jin-Ghoo Choi ,  Sang-Boh Yun ,  Jong-Ho Lee ,  Yong-Soo Cho ,  Jae-Kwon Kim ,  Yeong-Jun Kim ,  Kyung-Soo Woo ,  Hyun-Il Yoo

IPC分类号： H04W36/04

CPC分类号： H04W36/30 ,  H04B7/2606 ,  H04W16/26

摘要： Provided is a handover method of a wireless communication system using a hierarchical cellular scheme. In the method, signal quality of a serving node is measured, so that whether to start scanning for a handover is determined. When the scanning for the handover starts, signal qualities of a serving cell including the serving node and one or more neighbor cells are measured through a first preamble including a first identifier for distinguishing a cell. An intra-cell handover or an inter-cell handover is selected using the signal qualities of the serving cell and the neighbor cells. Therefore, a terminal can easily distinguish between the inter-cell handover and the intra-cell handover, and an overhead during a handover can be reduced because an intra-cell handover procedure is simplified.

摘要翻译： 提供了使用分层蜂窝方案的无线通信系统的切换方法。 在该方法中，测量服务节点的信号质量，从而确定是否开始扫描切换。 当切换的扫描开始时，包括服务节点和一个或多个相邻小区的服务小区的信号质量通过包括用于区分小区的第一标识符的第一前同步码进行测量。 使用服务小区和相邻小区的信号质量来选择小区内切换或小区间切换。 因此，终端可以容易地区分小区间切换和小区内切换，并且可以减少切换期间的开销，因为小区内切换过程被简化。

公开(公告)号：US08633043B2

公开(公告)日：2014-01-21

申请号：US13332666

申请日：2011-12-21

申请人： Yong-Soo Cho ,  Young-Seok Choi ,  Dong-Hee Kim ,  Kyo-Ho Moon ,  Chul-Tae Kim ,  Kyu-Sun Choi

发明人： Yong-Soo Cho ,  Young-Seok Choi ,  Dong-Hee Kim ,  Kyo-Ho Moon ,  Chul-Tae Kim ,  Kyu-Sun Choi

IPC分类号： H01L21/02

CPC分类号： G02F1/1333 ,  G02F1/1368 ,  G02F2001/134372 ,  H01L27/124 ,  H01L27/1288

摘要： A method of fabricating a fringe field switching (FFS)-liquid crystal display (LCD) device may have the following advantage. An inferior connection between the drain electrode and the pixel electrode may be prevented by preventing formation of a copper compound on the drain electrode, by performing a back channel etching after patterning a pixel electrode, and by performing a wet strip rather than a dry strip. This may result in a direct contact between copper and ITO, thereby reducing the number of mask processes.