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：US20110033015A1

公开(公告)日：2011-02-10

申请号：US12640194

申请日：2009-12-17

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： H04B7/10

CPC分类号： H04B7/084 ,  H04B17/336

摘要： A multi-antenna system using adaptive beamforming includes a phase shift unit, a signal combination unit, a frequency down-converter, and an analog-to-digital (A/D) converter, and a beamforming control unit. The phase shift unit includes a plurality of phase shifters which shift the phases of signals received from a plurality of antennas. The signal combination unit combines phase-shifted signals output from the plurality of phase shifters. The frequency down-converter down-converts a signal output from the signal combination unit into a baseband signal. The A/D converter converts the baseband signal into a digital signal. The beamforming control unit searches for a weight vector higher than a preset threshold signal-to-noise ratio (SNR) when a reception SNR of the digital signal output from the A/D converter is lower than the threshold SNR, and changes a currently set weight vector into the searched weight vector to provide to the phase shift unit.

摘要翻译： 使用自适应波束形成的多天线系统包括相移单元，信号组合单元，下变频器和模数（A / D）转换器以及波束成形控制单元。 相移单元包括多个移相器，其移位从多个天线接收的信号的相位。 信号组合单元组合从多个移相器输出的相移信号。 降频转换器将从信号组合单元输出的信号下变频为基带信号。 A / D转换器将基带信号转换为数字信号。 当从A / D转换器输出的数字信号的接收SNR低于阈值SNR时，波束形成控制单元搜索高于预设阈值信噪比（SNR）的权重向量，并且改变当前设置 加权向量到搜索到的权重向量中以提供给相移单元。

公开(公告)号：US08897765B2

公开(公告)日：2014-11-25

申请号：US12417675

申请日：2009-04-03

申请人： Jung Hoon Suh ,  Ki-Hong Park ,  Young-Chai Ko ,  Jin Hee Lee

发明人： Jung Hoon Suh ,  Ki-Hong Park ,  Young-Chai Ko ,  Jin Hee Lee

IPC分类号： H04W4/00 ,  H04W92/10 ,  H04B7/02

CPC分类号： H04W92/10 ,  H04B7/022

摘要： A method and apparatus for controlling signal transmission is provided. The method includes determining whether a signal to noise ratio (SNR) between a first base station and a signal receiving node is less than a threshold, and controlling the first base station and a second base station to cooperatively transmit a signal to the signal receiving node in response to the SNR being less than the threshold. Further, the second base station is located in an adjacent cell to a cell containing the first base station.

摘要翻译： 提供了一种用于控制信号传输的方法和装置。 该方法包括确定第一基站和信号接收节点之间的信噪比（SNR）是否小于阈值，并且控制第一基站和第二基站以协调地将信号发送到信号接收节点 响应SNR小于阈值。 此外，第二基站位于与包含第一基站的小区相邻的小区中。

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：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：US08503565B2

公开(公告)日：2013-08-06

申请号：US12739730

申请日：2008-10-23

申请人： Woo Yong Lee ,  Hyoung Jin Kwon ,  Kyeongpyo Kim ,  Jin Kyeong Kim ,  Yong Sun Kim ,  Jae Sup Lee ,  Young-chai Ko

发明人： Woo Yong Lee ,  Hyoung Jin Kwon ,  Kyeongpyo Kim ,  Jin Kyeong Kim ,  Yong Sun Kim ,  Jae Sup Lee ,  Young-chai Ko

IPC分类号： H04B7/02

CPC分类号： H04B7/0617 ,  H04B7/0434 ,  H04B7/0619

摘要： A multiple antenna communication method and a multiple antenna communication system are provided. The multiple antenna communication method includes: determining a weighting vector with respect to a plurality of transmit antennas, using a spread spectrum code; determining a target transmission rate of each of the transmit antennas using the determined weighting vector; transmitting information associated with the target transmission rate to a multiple antenna reception apparatus; receiving, from the multiple antenna reception apparatus, channel information including information regarding whether to accept the transmitted target transmission rate information; and transmitting data to the multiple antenna reception apparatus using the received channel information.

摘要翻译： 提供多天线通信方法和多天线通信系统。 多天线通信方法包括：使用扩频码确定相对于多个发射天线的加权矢量; 使用确定的加权矢量确定每个发射天线的目标传输速率; 将与所述目标传输速率相关联的信息发送到多天线接收装置; 从所述多个天线接收装置接收包括关于是否接受所发送的目标传输速率信息的信息的信道信息; 以及使用所接收的信道信息将数据发送到所述多天线接收装置。

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：US08374542B2

公开(公告)日：2013-02-12

申请号：US13556895

申请日：2012-07-24

申请人： Jun Il Choi ,  Chang Soon Park ,  Ki-Hong Park ,  Young-Chai Ko ,  Jin Hee Lee

发明人： Jun Il Choi ,  Chang Soon Park ,  Ki-Hong Park ,  Young-Chai Ko ,  Jin Hee Lee

IPC分类号： H04B3/36

CPC分类号： H04B7/2606 ,  H04B7/15507

摘要： A data transmission system transmitting data using a relay is provided. The relay selects a transmission terminal from a plurality of terminals connected to a base station. During a first time slot, the base station transmits base station data to the relay and the transmission terminal transmits terminal data to the relay. The relay transmits the terminal data to the base station and transmits the base station data to the transmission terminal during a second time slot.

摘要翻译： 提供了使用继电器发送数据的数据传输系统。 继电器从连接到基站的多个终端中选择发送终端。 在第一时隙期间，基站向中继发送基站数据，并且发送终端向终端发送终端数据。 中继站将终端数据发送到基站，并且在第二时隙期间将基站数据发送到传输终端。

公开(公告)号：US20130022143A1

公开(公告)日：2013-01-24

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： H04L27/28 ,  H04B15/00 ,  H04J11/00

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传输到发射装置。