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    • 2. 发明申请
    • MULTI-ANTENNA SYSTEM USING ADAPTIVE BEAMFORMING
    • 使用自适应光束的多天线系统
    • US20110033015A1
    • 2011-02-10
    • US12640194
    • 2009-12-17
    • Chul Gyun PARKYoung Chai KOKyung Tae JOJoun Sup PARK
    • Chul Gyun PARKYoung Chai KOKyung Tae JOJoun Sup PARK
    • H04B7/10
    • H04B7/084H04B17/336
    • 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.
    • 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。
    • 4. 发明申请
    • METHOD OF REDUCING RETRANSMISSION OF DATA FRAME AND RECEIVING NODE THEREFOR
    • 减少数据帧重传和接收节点的方法
    • US20120250495A1
    • 2012-10-04
    • US13313439
    • 2011-12-07
    • Joun Sup PARKChul Gyun PARKSang Heon PACKJae Duck KO
    • Joun Sup PARKChul Gyun PARKSang Heon PACKJae Duck KO
    • H04L12/24H04L12/26
    • H04L1/1819H04L1/1671H04L1/1864
    • A method of reducing a retransmission of a data frame and a receiving node therefor continuously receiving N data frames generated by encoding K source data packets by erasure coding. Errors in the received N data frames are checked, and an ACK message transmitted informing that the source data packets are capable of being restored, when the number (R) of data frames not containing errors is equal to or greater than the number (K) of source data packets. An ACK message including the number (X) of data frames for which retransmission is to be requested is transmitted when the number (R) of data frames not containing errors is less than the number (K) of source data packets, as a result of checking for errors in the received N data frames. Despite errors in some of the data frames, data may be restored without requesting the retransmission of data frames.
    • 一种减少数据帧和其接收节点的重传的方法,通过擦除编码连续接收通过编码K个源数据分组而产生的N个数据帧。 检查所接收的N个数据帧中的错误,并且当不包含错误的数据帧的数量(R)等于或大于数量(K)时,发送通知源数据分组能够恢复的ACK消息, 的源数据包。 当不包含错误的数据帧的数量(R)小于源数据分组的数量(K)时,发送包括要请求重传的数据帧的数量(X)的ACK消息,作为 检查接收到的N个数据帧中的错误。 尽管在一些数据帧中存在错误,但是可以在不请求重发数据帧的情况下恢复数据。
    • 5. 发明申请
    • COOPERATIVE TRANSMISSION METHOD AND COMMUNICATION SYSTEM USING THE SAME
    • 合作传输方法和使用该协议的通信系统
    • US20110126077A1
    • 2011-05-26
    • US12840459
    • 2010-07-21
    • Chul Gyun PARKIn Duk HANWon Jin LEEJun HEOJoun Sup PARK
    • Chul Gyun PARKIn Duk HANWon Jin LEEJun HEOJoun Sup PARK
    • H03M13/29G06F11/10
    • H04L1/0077H04L1/0057H04L1/0059H04L2001/0097
    • A cooperative transmission method includes: a first operation of coding, by a source node, a message desired to be transmitted according to a first encoding scheme to generate a first codeword and transmitting the first codeword to a relay node and a destination node; a second operation of decoding, by the relay node, the first codeword which has been received from the source node, coding the decoded message according to a second coding scheme to generate a second codeword, coding a part corresponding to parity of the second codeword according to the first coding scheme to generate a third codeword, and transmitting the third codeword to the destination node; and a third operation of decoding, by the destination node, the first codeword which has been received from the source node and the third codeword which has been received from the relay node, combining the message generated by decoding the first codeword and the parity part of the second codeword generated by decoding the third codeword to generate a fourth codeword according to the second coding scheme, and decoding the fourth codeword to estimate the message desired to be transmitted.
    • 协作传输方法包括:由源节点根据第一编码方案对期望发送的消息进行编码以产生第一码字并将第一码字发送到中继节点和目的地节点的第一操作; 由中继节点对从源节点接收到的第一码字进行解码的第二操作,根据第二编码方案对解码的消息进行编码,以生成第二码字,根据第二码字编码对应于第二码字的奇偶校验的部分, 到第一编码方案以产生第三码字,并将第三码字发送到目的地节点; 以及由目的地节点对从所述源节点接收的所述第一码字和从所述中继节点接收到的所述第三码字进行解码的第三操作,将通过解码所述第一码字而生成的消息与所述第一码字的奇偶校验部分 通过解码第三码字产生的第二码字,以根据第二编码方案产生第四码字,以及解码第四码字以估计期望发送的消息。
    • 7. 发明申请
    • BEAMFORMING APPARATUS AND METHOD FOR MULTI-ANTENNA SYSTEM
    • 用于多天线系统的波束形成装置和方法
    • US20110032150A1
    • 2011-02-10
    • US12850233
    • 2010-08-04
    • Chul Gyun PARKYoung Chai KOKyung Tae JOJoun Sup PARK
    • Chul Gyun PARKYoung Chai KOKyung Tae JOJoun Sup PARK
    • H01Q3/00
    • H01Q3/2605
    • 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.
    • 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。