公开(公告)号：US08599980B2

公开(公告)日：2013-12-03

申请号：US13469591

申请日：2012-05-11

申请人： Young Chai Ko ,  Hyun Ho Lee

发明人： Young Chai Ko ,  Hyun Ho Lee

IPC分类号： H04B7/10 ,  H01Q3/00

CPC分类号： H04B7/0417 ,  H04B7/0634 ,  H04L27/2601 ,  H04L2025/03802

摘要： The present invention relates to a symbol-wise beamforming apparatus and method in an OFDM communication system using multiple antennas. A weight vector calculator calculates a transmit weight vector using a signal received through the multiple antennas as an input on the basis of channel information in the time domain and covariance matrix information about interference and noise and computes a receive weight vector using the calculated transmit weight vector. At least one of the calculated transmit weight vector and receive weight vector is transmitted to a transmission apparatus through a transmitter.

摘要翻译： 本发明涉及使用多个天线的OFDM通信系统中的符号式波束成形装置和方法。 权重向量计算器基于时域中的信道信息和关于干扰和噪声的协方差矩阵信息，使用通过多个​​天线接收的信号作为输入来计算发射权重向量，并使用计算的发射权重向量计算接收权重向量 。 所计算的发射权重向量和接收权重向量中的至少一个通过发射机发送到发射装置。

公开(公告)号：US08583055B2

公开(公告)日：2013-11-12

申请号：US13165266

申请日：2011-06-21

申请人： Joun Sup Park ,  Chul Gyun Park ,  Young Chai Ko ,  Hyun Ho Lee

发明人： Joun Sup Park ,  Chul Gyun Park ,  Young Chai Ko ,  Hyun Ho Lee

IPC分类号： H04B1/00 ,  H04B7/00

CPC分类号： H04B7/0617 ,  H04B7/0634 ,  H04B7/0639 ,  H04L5/0023 ,  H04L5/0048

摘要： Disclosed are a beam forming method and a multiple antenna system using the same. There is provided a multiple antenna system which forms optimal beam patterns through a transmission of a training sequence between a transmitter and a receiver, each including a plurality of antennas, the multiple antenna system comprising: a transmitter selecting antennas to be activated according to a level and transmitting the training sequence to a receiver through the selected antennas; a receiver selecting the antennas to be activated according to the level and transmitting to the transmitter an index of an optimal transmission weight vector significantly reducing a cost function based on the training sequence transmitted from the transmitter, wherein the transmitter selects antennas so that the beam patterns formed by the antennas selected at a q-th level (q: the index of the level) include the beam patterns formed by the antennas selected at a q+1-th level. As a result, the transmission frequency of the training sequence may be reduced.

摘要翻译： 公开了一种波束形成方法和使用该波束形成方法的多天线系统。 提供了一种多天线系统，其通过发射机和接收机之间的训练序列的传输形成最佳波束图案，每个天线系统包括多个天线，所述多天线系统包括：发射机，根据等级来选择要激活的天线 并通过所选择的天线将训练序列发射到接收机; 接收机根据电平选择要激活的天线，并且基于从发射机发送的训练序列向发射机发送最佳传输权重向量的索引，其显着地降低成本函数，其中发射机选择天线，使得波束模式 由在第q级选择的天线（q：电平的索引）形成的天线包括由在q + 1级选择的天线形成的波束图案。 结果，可以减少训练序列的发送频率。

公开(公告)号：US20120200459A1

公开(公告)日：2012-08-09

申请号：US13165266

申请日：2011-06-21

申请人： Joun Sup PARK ,  Chul Gyun Park ,  Young Chai Ko ,  Hyun Ho Lee

发明人： Joun Sup PARK ,  Chul Gyun Park ,  Young Chai Ko ,  Hyun Ho Lee

IPC分类号： H01Q3/00

CPC分类号： H04B7/0617 ,  H04B7/0634 ,  H04B7/0639 ,  H04L5/0023 ,  H04L5/0048

摘要： Disclosed are a beam forming method and a multiple antenna system using the same. There is provided a multiple antenna system which forms optimal beam patterns through a transmission of a training sequence between a transmitter and a receiver, each including a plurality of antennas, the multiple antenna system comprising: a transmitter selecting antennas to be activated according to a level and transmitting the training sequence to a receiver through the selected antennas; a receiver selecting the antennas to be activated according to the level and transmitting to the transmitter an index of an optimal transmission weight vector significantly reducing a cost function based on the training sequence transmitted from the transmitter, wherein the transmitter selects antennas so that the beam patterns formed by the antennas selected at a q-th level (q: the index of the level) include the beam patterns formed by the antennas selected at a q+1-th level. As a result, the transmission frequency of the training sequence may be reduced.

摘要翻译： 公开了一种波束形成方法和使用该波束形成方法的多天线系统。 提供了一种多天线系统，其通过发射机和接收机之间的训练序列的传输形成最佳波束图案，每个天线系统包括多个天线，所述多天线系统包括：发射机，根据等级来选择要激活的天线 并通过所选择的天线将训练序列发射到接收机; 接收机根据电平选择要激活的天线，并且基于从发射机发送的训练序列向发射机发送最佳传输权重向量的索引，其显着地降低成本函数，其中发射机选择天线，使得波束模式 由在第q级选择的天线（q：电平的索引）形成的天线包括由在q + 1级选择的天线形成的波束图案。 结果，可以减少训练序列的发送频率。

公开(公告)号：US08675750B2

公开(公告)日：2014-03-18

申请号：US13165569

申请日：2011-06-21

申请人： Joun Sup Park ,  Chul Gyun Park ,  Young Chai Ko ,  Seung Sik Eum

发明人： Joun Sup Park ,  Chul Gyun Park ,  Young Chai Ko ,  Seung Sik Eum

IPC分类号： H04L27/28

CPC分类号： H04L27/2621 ,  H04L27/2614

摘要： There are provided an apparatus and a method for reducing a peak to average power ratio (PAPR) through the recombination of an orthogonal frequency division multiplexing (OFDM) symbol. The apparatus includes an orthogonal frequency division multiplexing (OFDM) symbol transforming unit, a peak power measuring unit, and an OFDM symbol selecting unit, wherein the OFDM symbol transforming unit generates the plurality of OFDM symbols by (a) performing a process of rotating the OFDM symbol by a predetermined angle in a complex plane and performing cyclical shifting with respect to the rotated OFDM symbol and (b) repetitively performing process (a) with respect to the cyclically shifted OFDM symbol. Therefore, diversity is secured, whereby the PAPR may be reduced.

摘要翻译： 提供了通过正交频分复用（OFDM）符号的复合来降低峰均功率比（PAPR）的装置和方法。 该装置包括正交频分复用（OFDM）符号变换单元，峰值功率测量单元和OFDM符号选择单元，其中，OFDM符号变换单元通过以下步骤生成多个OFDM符号：（a）执行使 OFDM符号在复平面中以预定角度执行并且相对于旋转的OFDM符号执行循环移位，以及（b）相对于循环移位OFDM符号重复执行处理（a）。 因此，确保分集，由此可以减少PAPR。

公开(公告)号：US20120201314A1

公开(公告)日：2012-08-09

申请号：US13165569

申请日：2011-06-21

申请人： Joun Sup PARK ,  Chul Gyun Park ,  Young Chai Ko ,  Seung Sik Eum

发明人： Joun Sup PARK ,  Chul Gyun Park ,  Young Chai Ko ,  Seung Sik Eum

IPC分类号： H04L27/28

CPC分类号： H04L27/2621 ,  H04L27/2614

摘要： There are provided an apparatus and a method for reducing a peak to average power ratio (PAPR) through the recombination of an orthogonal frequency division multiplexing (OFDM) symbol. The apparatus includes an orthogonal frequency division multiplexing (OFDM) symbol transforming unit sequentially transforming an OFDM symbol in a time domain obtained through an inverse fast Fourier transform (IFFT) to generate a plurality of OFDM symbols; a peak power measuring unit measuring peak powers of each of the OFDM symbol and the plurality of OFDM symbols generated therefrom; and an OFDM symbol selecting unit selecting an OFDM symbol having a minimum value among the measured peak powers as a candidate OFDM symbol to be transmitted and transmitting the selected candidate OFDM symbol, wherein the OFDM symbol transforming unit generates the plurality of OFDM symbols by (a) performing a process of rotating the OFDM symbol by a predetermined angle in a complex plane and performing cyclical shifting with respect to the rotated OFDM symbol and (b) repetitively performing process (a) with respect to the cyclically shifted OFDM symbol. Therefore, diversity is secured, whereby the PAPR may be reduced.

摘要翻译： 提供了通过正交频分复用（OFDM）符号的复合来降低峰均功率比（PAPR）的装置和方法。 该装置包括正交频分复用（OFDM）符号变换单元，其顺序地变换通过快速傅里叶逆变换（IFFT）获得的时域中的OFDM符号，以生成多个OFDM符号; 峰值功率测量单元，测量每个所述OFDM符号和从其生成的所述多个OFDM符号的峰值功率; 以及OFDM符号选择单元，选择所测量的峰值功率中具有最小值的OFDM符号作为要发送的候选OFDM符号，并发送所选择的候选OFDM符号，其中，所述OFDM符号变换单元通过（a ）执行在复平面中旋转预定角度的OFDM符号并相对于旋转的OFDM符号执行循环移位的处理，以及（b）相对于循环移位OFDM符号重复执行处理（a）。 因此，确保分集，由此可以减少PAPR。

公开(公告)号：US07965234B2

公开(公告)日：2011-06-21

申请号：US12850233

申请日：2010-08-04

申请人： Chul Gyun Park ,  Young Chai Ko ,  Kyung Tae Jo ,  Joun Sup Park

发明人： Chul Gyun Park ,  Young Chai Ko ,  Kyung Tae Jo ,  Joun Sup Park

IPC分类号： H01Q3/00

CPC分类号： H01Q3/2605

摘要： A beamforming apparatus for a multi-antenna system includes a phase control unit including a plurality of phase shifters which respectively control the phases of signals according to a preset phase weight vector; a signal combination unit combining the signals outputted from the plurality of phase shifters; a frequency down converter down-converting the combined signal outputted from the signal combination unit into a baseband signal; an analog/digital (A/D) converter converting the baseband signal into a digital signal; and a radio frequency (RF) beamforming control unit providing a plurality of preset phase weight vectors to the phase control unit according to a preset application sequence, deciding a maximum signal-to-noise ratio (SNR) among a plurality of SNRs corresponding to the applied phase weight vectors by using the digital signal outputted from the A/D converter, and controlling the beamforming of the phase control unit by using the maximum SNR.

摘要翻译： 一种用于多天线系统的波束成形装置，包括：相位控制单元，包括：多个移相器，分别根据预置的相位权矢量来控制信号的相位; 信号组合单元，组合从所述多个移相器输出的信号; 降频转换器将从信号组合单元输出的组合信号下变频为基带信号; 将基带信号转换为数字信号的模拟/数字（A / D）转换器; 以及射频（RF）波束形成控制单元，其根据预设的应用序列向所述相位控制单元提供多个预设相位加权矢量，从而确定与所述相关控制单元对应的多个SNR中的最大信噪比（SNR） 通过使用从A / D转换器输出的数字信号来施加相位权重向量，并且通过使用最大SNR来控制相位控制单元的波束形成。

公开(公告)号：US20090060079A1

公开(公告)日：2009-03-05

申请号：US11934482

申请日：2007-11-02

申请人： Sang Ho CHOI ,  Young Chai Ko ,  Jun Heo ,  Byung Gueon Min

发明人： Sang Ho CHOI ,  Young Chai Ko ,  Jun Heo ,  Byung Gueon Min

IPC分类号： H04L23/02

CPC分类号： H04L25/03203 ,  H04L25/0204 ,  H04L25/0242 ,  H04L25/0246 ,  H04L2025/03426

摘要： Disclosed is a method for detecting a symbol using a trellis structure on a multiple input multiple output (MIMO) mobile communication system. The method includes the steps of: setting a plurality of states by grouping symbols producible from a receiving signal in the unit of sub-states; calculating metric values for paths inputted to the sub-states and selecting paths having the calculated metric values smaller than a preset first threshold, as first surviving paths; setting a second threshold based on an accumulated metric value of a path having the smallest accumulated metric in each of the states; and selecting paths having metric value smaller than the second threshold, as second surviving paths, among the first surviving paths selected for each state.

摘要翻译： 公开了一种在多输入多输出（MIMO）移动通信系统上使用网格结构检测符号的方法。 该方法包括以下步骤：通过以子状态为单位分组从接收信号产生的符号来设置多个状态; 计算输入到子状态的路径的度量值，以及选择具有小于预置的第一阈值的计算度量值的路径作为第一存活路径; 基于每个状态中具有最小累积度量的路径的累积度量值设置第二阈值; 以及在为每个状态选择的第一幸存路径中，选择具有小于第二阈值的度量值的路径作为第二存活路径。

公开(公告)号：US08712341B2

公开(公告)日：2014-04-29

申请号：US12525290

申请日：2008-01-18

申请人： Young Chai Ko ,  Hae Woon Nam ,  Seung Sik Eom

发明人： Young Chai Ko ,  Hae Woon Nam ,  Seung Sik Eom

IPC分类号： H04B1/44

CPC分类号： H04B7/061 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/06

摘要： A method and an apparatus for transmitting and receiving a signal in a communication system are provided. The method includes transmitting a signal to a receiver through one of the antennas, receiving an antenna switching indicator indicating to switch the transmitting antenna from the receiver, and switching the transmitting antenna according to the antenna switching indicator, and transmitting a signal to the receiver through a switched antenna.

摘要翻译： 提供了一种用于在通信系统中发送和接收信号的方法和装置。 该方法包括：通过天线之一向接收机发送信号，接收指示从接收机切换发射天线的天线切换指示符，并根据天线切换指示灯切换发射天线，并通过 一个开关天线。

公开(公告)号：US20130128802A1

公开(公告)日：2013-05-23

申请号：US13364083

申请日：2012-02-01

申请人： Joun Sup PARK ,  Young Chai Ko ,  Seong Ho Park

发明人： Joun Sup PARK ,  Young Chai Ko ,  Seong Ho Park

IPC分类号： H04B15/00 ,  H04W88/04

CPC分类号： H04B7/15592 ,  H04W84/047

摘要： There are provided a multi-relay transmission apparatus and method. The multi-relay transmission apparatus includes: a source node repeatedly alternately performing a first phase in which preceding data is transmitted during a first transmission period equivalent to a transmission period during which unit frames are transmitted and a second phase in which subsequent data that follows the preceding data is transmitted during a second transmission period that follows the first transmission period; and a relay network including a plurality of relay nodes receiving data from the source node, in which, in the first phase, a predetermined relay node, among the plurality of relay nodes, receives the preceding data from the source node and the remaining relay nodes, among the plurality of relay nodes, and in the second phase, the remaining relay nodes receive the subsequent data from the source node.

摘要翻译： 提供了一种多中继传输装置和方法。 多中继传输装置包括：源节点重复地交替执行第一阶段，其中在与发送单元帧的传输周期相当的第一传输周期期间发送先前的数据，以及第二阶段，其中后续数据在 在第一传输周期之后的第二传输周期期间发送前一数据; 以及包括从所述源节点接收数据的多个中继节点的中继网络，其中，在所述第一阶段中，所述多个中继节点中的预定中继节点从所述源节点和所述剩余中继节点接收所述先前数据 在多个中继节点中，并且在第二阶段中，剩余的中继节点从源节点接收后续数据。

公开(公告)号：US20100075617A1

公开(公告)日：2010-03-25

申请号：US12525290

申请日：2008-01-18

申请人： Young Chai Ko ,  Hae Woon Nam ,  Seung Sik Eom

发明人： Young Chai Ko ,  Hae Woon Nam ,  Seung Sik Eom

IPC分类号： H04B1/44

CPC分类号： H04B7/061 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/06

摘要： A method and an apparatus for transmitting and receiving a signal in a communication system are provided. The method includes transmitting a signal to a receiver through one of the antennas, receiving an antenna switching indicator indicating to switch the transmitting antenna from the receiver, and switching the transmitting antenna according to the antenna switching indicator, and transmitting a signal to the receiver through a switched antenna.

摘要翻译： 提供了一种用于在通信系统中发送和接收信号的方法和装置。 该方法包括：通过天线之一向接收机发送信号，接收指示从接收机切换发射天线的天线切换指示符，并根据天线切换指示灯切换发射天线，并通过 一个开关天线。