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公开(公告)号：KR1020170110275A
公开(公告)日：2017-10-11
申请号：KR1020160034426
申请日：2016-03-23
IPC: H03F1/32
CPC classification number: H04B1/04 , H03F1/3247 , H03F3/195 , H03F3/245 , H03F3/68 , H03F2200/451 , H04B1/0475 , H04B2001/0425
Abstract: 본발명의일 실시예에따른고주파신호전치왜곡장치는, 서로다른안테나를통해송신되는복수의고주파신호의비선형왜곡특성을추정하는고주파신호추정기와, 비선형왜곡특성에기초하여전치왜곡계수를추정하는전치왜곡추정기와, 전치왜곡계수에기초하여복수의고주파신호의베이스신호를전치왜곡하는전치왜곡기를포함할수 있다.
Abstract translation: 根据本发明，失真设备，彼此的一个实施例转置高频信号来估计高频信号估计器和，由基于非线性失真特性的预失真系数来估计通过其它天线发送的多个高频信号的的非线性失真特性 预失真估计器和预失真器，用于基于预失真系数对多个高频信号的基础信号进行预失真。
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公开(公告)号：KR1020170106603A
公开(公告)日：2017-09-21
申请号：KR1020160029813
申请日：2016-03-11
CPC classification number: H03F1/0216 , H03F1/0227 , H03F1/3247 , H03F3/20 , H03F3/245 , H03F2200/102 , H03F2200/324 , H03F2200/435 , H03F2200/516 , H03F2201/3224
Abstract: 본발명의일 실시예에따른추적전력증폭장치는입력신호및 출력신호를이용하여제1 전치왜곡파라미터를산출하고, 상기제1 전치왜곡파라미터를이용하여상기입력신호를왜곡한제1 왜곡신호를출력하는제1 전치왜곡부; 상기입력신호및 제2 포락선신호를이용하여제2 전치왜곡파라미터를산출하고, 상기제2 전치왜곡파라미터를이용하여상기제1 왜곡신호를왜곡한제2 왜곡신호를출력하는제2 전치왜곡부; 상기제1 왜곡신호를입력받아제1 포락선신호를생성하며, 상기제1 포락선신호를대역폭제한한상기제2 포락선신호에따라공급전원을제공하는전원공급부; 및상기공급전원을제공받고상기제2 왜곡신호를증폭한출력신호를출력하는전력증폭기를포함할수 있다.
Abstract translation: 根据本发明的实施例跟踪功率放大器计算使用输入信号和输出信号，利用第一预失真参数的失真信号的第一失真到输入信号中的第一预失真参数 第一预失真器，用于输出第一预失真器; 第2部分预失真器，用于使用由所述第一失真的第二预失真参数的输入信号和第二包络信号，并且输出信号的第二失真信号加捻计算第二预失真参数; 电源单元，用于接收第一失真信号以产生第一包络信号并根据第一包络信号的带宽被限制的第二包络信号提供电源; 以及功率放大器，用于接收电源并输出通过放大第二失真信号而获得的输出信号。
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公开(公告)号：KR1020170084517A
公开(公告)日：2017-07-20
申请号：KR1020160003633
申请日：2016-01-12
Applicant: 한국과학기술원
Abstract: 주파수영역의트레이닝신호를이용한신호프레임, 및이에기반한통신방법및 장치들이개시된다. 일실시예에따른신호프레임은동기획득을위한주파수영역의트레이닝신호를포함하는트레이닝블록과, 주파수영역의데이터를포함하는데이터블록을포함한다.
Abstract translation: 公开了一种使用频域中的训练信号的信号帧，以及基于此的通信方法和设备。 根据实施例的信号帧包括训练块，该训练块包括用于获取同步的频域中的训练信号和包括频域中的数据的数据块。
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公开(公告)号：KR101265241B1
公开(公告)日：2013-05-16
申请号：KR1020110104534
申请日：2011-10-13
Applicant: 한국과학기술원
IPC: H04B1/62
Abstract: 본발명은디지털전치왜곡장치및 그방법에관한것으로서, 본발명의목적은전치왜곡기능을구현할때 필요한기존궤환루프의복조(demodulation) 기능을포락선검출방식으로대체함으로써, 전치왜곡구현에필요한궤환루프의구현복잡도를줄여구현비용및 부피를최소화하면서동일한기능을수행할수 있는디지털전치왜곡장치및 그방법을제공함에그 목적이있다. 이러한기술적과제를달성하기위한본 발명은, 전력증폭기및 전치왜곡기와연결되어궤환루프에형성되는전력증폭기의비선형특성을보상하기위한전치왜곡장치에있어서, 전력증폭기의출력을기저대역신호로변환하는제1포락선검출기; 전력증폭기의입력과출력의차이를기저대역신호로변환하는제2포락선검출기; 및상기제1포락선검출기의기저대역신호를이용하여증폭기출력의절대값을계산하고, 상기제2포락선검출기의기저대역신호를이용하여전력증폭기로인한변화된위상을추정하여전력증폭기의출력과전치왜곡계수를계산하여전치왜곡기로전송하는연산부; 를포함하는것을특징으로한다. 한편, 전력증폭기및 전력증폭기와연결되어궤환루프에형성되는전력증폭기의비선형특성을보상하기위한디지털전치왜곡방법에있어서, (a) 연산부가전치왜곡기계수를추정하기위하여전력증폭기의출력의특성을판단하는단계; (b) 연산부가선형화를위한전력증폭기의출력의역함수를이용하여전치왜곡계수를계산하는단계; 및 (c) 전치왜곡기가추출된전치왜곡계수를적용하여전력증폭기의출력을선형화하는단계; 를포함하는것을특징으로한다.
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公开(公告)号：KR1020120110311A
公开(公告)日：2012-10-10
申请号：KR1020110028092
申请日：2011-03-29
Applicant: 한국과학기술원
CPC classification number: H03F1/3247 , H03F1/3258 , H03F3/24
Abstract: PURPOSE: A pre-distortion apparatus and method for removing a local oscillator coupling effect from an output of a power amplifier are provided to obtain linear characteristics by providing a predistortion technique for compensating for the linear characteristics. CONSTITUTION: A predistorter(100) is provided to linearize nonlinear characteristics of a transmitter. A modulator(200) modulates an output signal of the predistorter. A power amplifier(300) amplifies a signal modulated through the modulator. A demodulator(400) provides feeds back of an output of a power amplifier to a base band. A coefficient estimator(500) produces the nonlinear characteristics of the transmitter using an output signal of the predistorter and a fed back signal from the demodulator. The coefficient estimator estimates the coefficient of the predistorter. [Reference numerals] (100) Predistorter; (200) Modulator; (300) Power amplifier; (400) Demodulator; (500) Coefficient estimator; (AA) Predistortion apparatus
Abstract translation: 目的：提供一种用于从功率放大器的输出去除本地振荡器耦合效应的预失真装置和方法，以通过提供用于补偿线性特性的预失真技术来获得线性特性。 构成：提供了一个预失真器（100）来线性化发射机的非线性特性。 调制器（200）调制预失真器的输出信号。 功率放大器（300）放大通过调制器调制的信号。 解调器（400）提供功率放大器的输出到基带的反馈。 系数估计器（500）使用预失真器的输出信号和来自解调器的反馈信号产生发射机的非线性特性。 系数估计器估计预失真器的系数。 （附图标记）（100）预失真器; （200）调制器; （300）功率放大器; （400）解调器; （500）系数估计器; （AA）预失真装置
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Patent Agency Ranking
公开(公告)号：KR101071317B1
公开(公告)日：2011-10-07
申请号：KR1020090104748
申请日：2009-11-02
Applicant: 한국과학기술원
IPC: H03F1/32
Abstract: 본발명은전력증폭장치에관한것으로서, 본발명의목적은, 전력증폭기의특성을간단히모델링하여전력증폭기의특성을추정(identification) 하고, 전력증폭기의모델에기반하여, 전력증폭기의비선형특성기부분을보상하는전치왜곡구조를갖는, 전치왜곡을이용한전력증폭장치를제공하는것이다. 이를위해본 발명은, 비선형전력증폭기의비선형성을보상하기위한 Hammerstein 기반의전치왜곡을이용한전력증폭장치에있어서, 입력신호및, 비선형모델계수와주파수영역선등화기계수를이용하여 Wiener 모델의역함수특성출력인을출력하는전치왜곡기; 상기전치왜곡기의출력신호을입력받아증폭된출력신호을출력하는전력증폭기; 및상기전력증폭기의출력신호과상기전력증폭기의입력신호을입력받아, 상기비선형모델계수와상기주파수영역선등화기계수를추출하여, 상기전치왜곡기로전송하는계수추출부를포함한다.
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公开(公告)号：KR1020100079681A
公开(公告)日：2010-07-08
申请号：KR1020080138223
申请日：2008-12-31
Applicant: 엘아이지넥스원 주식회사 , 한국과학기술원
CPC classification number: H04B7/18532 , H04W84/06
Abstract: PURPOSE: A method for obtaining uplink/downlink timing synchronization of a satellite communication system and a system thereof are provided to continuously obtain uplink/downlink timing synchronization between a communication terminal and a satellite using the first and second pilot signals inserted into a signal frame, thereby minimizing loss of transmitting efficiency. CONSTITUTION: The first communication terminal inserts the first pilot signal into a predetermined point of a signal frame(S10a). A satellite inserts the second pilot signal into a predetermined point of a transmitted signal frame(S20a). The first communication terminal measures the time interval between a point into which the first pilot signal of a retransmitted signal frame is inserted and a point into which the second pilot signal is inserted(S30a). The first communication terminal obtains UL(UpLink) timing synchronization with the satellite using a measured result.
Abstract translation: 目的：提供一种用于获得卫星通信系统及其系统的上行链路/下行链路定时同步的方法，用于使用插入到信号帧中的第一和第二导频信号连续获得通信终端与卫星之间的上行链路/下行链路定时同步， 从而最小化传输效率的损失。 构成：第一通信终端将第一导频信号插入信号帧的预定点（S10a）。 卫星将第二导频信号插入发送信号帧的预定点（S20a）。 第一通信终端测量插入重发信号帧的第一导频信号的点与插入第二导频信号的点之间的时间间隔（S30a）。 第一通信终端使用测量结果与卫星获得UL（UpLink）定时同步。
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公开(公告)号：KR1020080094196A
公开(公告)日：2008-10-23
申请号：KR1020070038312
申请日：2007-04-19
Applicant: 한국과학기술원
CPC classification number: H03F1/3258 , H03F3/24 , H03F2201/3231
Abstract: An amplifying method and an amplifying apparatus using an adaptive predistortion based on a polynomial of a direct learning architecture are provided to simplify a structure of the amplifying apparatus by removing a postdistortion unit and a training block. A predistortion unit receives an input signal x(n) and outputs a compensated output signal, which is compensated by using a polynomial-based scheme, by using a polynomial coefficient w(n-1), which is received from a coefficient extractor. An amplifier is connected to an output side of the predistortion unit, receives an input signal y(n), and outputs an amplified output signal a(n). The coefficient extractor receives a feedback signal and an input signal x(n-1), obtains the polynomial coefficient of the predistortion unit, and transmits the coefficient to the predistortion unit. The feedback signal is obtained by dividing the output signal of the amplifier by a gain K of the amplifier. A postdistortion unit or a training block is removed from a feedback loop between an output side of the amplifier and the coefficient extractor.
Abstract translation: 提供了使用基于直接学习架构的多项式的自适应预失真的放大方法和放大装置，以通过去除后失真单元和训练块来简化放大装置的结构。 预失真单元接收输入信号x（n），并且通过使用从系数提取器接收的多项式系数w（n-1）输出通过使用基于多项式的方案来补偿的补偿输出信号。 放大器连接到预失真单元的输出侧，接收输入信号y（n），并输出放大的输出信号a（n）。 系数提取器接收反馈信号和输入信号x（n-1），获得预失真单元的多项式系数，并将该系数发送到预失真单元。 通过将放大器的输出信号除以放大器的增益K来获得反馈信号。 从放大器的输出侧和系数提取器之间的反馈回路中去除后失真单元或训练块。
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公开(公告)号：KR1020030092903A
公开(公告)日：2003-12-06
申请号：KR1020020030750
申请日：2002-05-31
Applicant: 한국과학기술원
IPC: H04B7/02
CPC classification number: H04B7/0667 , H04L1/0618
Abstract: PURPOSE: A method for estimating a carrier frequency error in a transmission diversity system is provided to induce an ML(Maximum Likelihood) estimator for an optional training signal, and to induce an ML estimator for a periodic training signal, thereby statistically analyzing the two ML estimators and minimizing an MSE(Mean Square Error). CONSTITUTION: When symbols transmitted through many transmission antennas are received in one receiving antenna through frequency selective fading channels(30a-30n), an ML frequency error is estimated in order to recover a carrier frequency if the symbols are optional training signals. A channel vector is estimated by using a frequency estimated value, so as to simultaneously estimate an ML channel and a frequency error.
Abstract translation: 目的：提供一种用于估计传输分集系统中的载波频率误差的方法，以诱导用于可选训练信号的ML（最大似然）估计器，并为周期性训练信号诱导ML估计器，从而统计分析两个ML 估计和最小化MSE（均方误差）。 构成：当通过许多发送天线发送的符号通过频率选择性衰落信道（30a-30n）在一个接收天线中被接收时，如果符号是可选的训练信号，则估计ML频率误差以恢复载波频率。 通过使用频率估计值来估计信道矢量，以便同时估计ML信道和频率误差。
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