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公开(公告)号：KR1020130074585A
公开(公告)日：2013-07-04
申请号：KR1020110142703
申请日：2011-12-26
Applicant: 한국전자통신연구원
IPC: H04B1/48
CPC classification number: H01Q21/28
Abstract: PURPOSE: A front-end apparatus of an RF transceiver which uses a high frequency passive device is provided to be connected to a plurality of antennas by using a circulator and to support a dual mode or a dual band. CONSTITUTION: A second circulator (403) outputs a second transmission signal inputted to a first terminal to a second terminal. The second circulator outputs a first reception signal inputted to a second terminal to a third terminal. A passive type directionality dual pole dual switch (404) includes the circulators. The passive type directionality dual pole dual switch changes a path according to a direction of input and output. A first antenna (405) transmits the first transmission signal switched through the passive type directionality dual pole dual switch to a radio channel. A second antenna (406) transmits the switched second transmission signal through the passive type directionality dual pole dual switch. [Reference numerals] (AA) Circulator #1; (BB) Circulator #2
Abstract translation: 目的：使用高频无源器件的RF收发器的前端设备通过使用循环器连接到多个天线，并支持双模式或双频带。 构成：第二循环器（403）将输入到第一端子的第二传输信号输出到第二端子。 第二循环器将输入到第二终端的第一接收信号输出到第三终端。 无源式方向性双极双开关（404）包括循环器。 无源式方向性双极双开关根据输入和输出方向改变路径。 第一天线（405）将通过无源方向性双极双开关切换的第一发送信号发送到无线电信道。 第二天线（406）通过无源式方向性双极双开关发射切换的第二传输信号。 （附图标记）（AA）循环器＃1; （BB）循环器＃2
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公开(公告)号：KR1020130069307A
公开(公告)日：2013-06-26
申请号：KR1020120042859
申请日：2012-04-24
Applicant: 한국전자통신연구원
IPC: H03M3/02
CPC classification number: H04L27/367 , H03F3/2175 , H03M3/404 , H04L25/4927
Abstract: PURPOSE: A digital modulation device and a method thereof are provided to generate a pseudo-digital signal for driving a class-s power amplifier entirely in a digital domain. CONSTITUTION: A first low-pass delta-sigma modulator(121) outputs a first signal by delta-sigma modulating the size of a baseband signal. A second low-pass delta-sigma modulator(122) outputs a second signal by delta-sigma modulating the phase of the baseband signal. A multiplexer(125) selects one carrier pulse signal among multiple carrier pulse signals with multiple discrete phases according to the second signal and outputs the carrier pulse signal. A logical product device(126) generates a pseudo-digital signal by using one carrier pulse signal and the first signal.
Abstract translation: 目的：提供一种数字调制装置及其方法，用于产生完全在数字领域驱动一级功率放大器的伪数字信号。 构成：第一低通Δ-Σ调制器（121）通过对基带信号的尺寸进行delta-sigma调制来输出第一信号。 第二低通Δ-Σ调制器（122）通过对基带信号的相位进行delta-sigma调制输出第二信号。 复用器（125）根据第二信号在具有多个离散相位的多个载波脉冲信号中选择一个载波脉冲信号，并输出载波脉冲信号。 逻辑产品设备（126）通过使用一个载波脉冲信号和第一信号来产生伪数字信号。
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公开(公告)号：KR1020130069058A
公开(公告)日：2013-06-26
申请号：KR1020110136585
申请日：2011-12-16
Applicant: 한국전자통신연구원
IPC: H04B7/155
CPC classification number: H04B7/155 , H04B7/2606 , H04B10/25758
Abstract: PURPOSE: A base station or a relay configuration device are provided not to require a high output power amplifier and to easily configure a base station or a relay despite of variation of output level of a base station or variation of cell environment. CONSTITUTION: An optoelectronic conversion unit(120) mutually converts optical signal and electrical signal. At least more than one of each RRH(Remote Radio Head) unit modules(110) includes a digital signal processing unit, an RF transception unit, a duplexer unit and an antenna radiation unit. The each of the RRH unit modules transceives a signal with the optoelectronic conversion unit. The each of the RRH unit modules mutually converts a digital electrical signal and an analog electrical signal. The each of the RRH unit modules mutually converts an analog electrical signal and an RF signal. [Reference numerals] (100) Base station or a relay configuration device; (110) RRH unit module; (120) Optoelectronic conversion unit; (130) Connector; (140) Power unit
Abstract translation: 目的：提供基站或中继配置装置，不需要高输出功率放大器，并且尽管基站的输出电平的变化或小区环境的变化也能够容易地配置基站或中继。 构成：光电转换单元（120）相互转换光信号和电信号。 每个RRH（远程无线电头）单元模块（110）中至少有一个包括数字信号处理单元，RF拦截单元，双工器单元和天线辐射单元。 每个RRH单元模块用光电转换单元收发信号。 每个RRH单元模块相互转换数字电信号和模拟电信号。 每个RRH单元模块相互转换模拟电信号和RF信号。 （附图标记）（100）基站或中继配置装置; （110）RRH单元模块; （120）光电转换装置; （130）连接器; （140）动力单元
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公开(公告)号：KR1020130063653A
公开(公告)日：2013-06-17
申请号：KR1020110130136
申请日：2011-12-07
Applicant: 한국전자통신연구원
IPC: H03F1/32
CPC classification number: H03F1/3247 , H03F1/3258 , H03F3/24
Abstract: PURPOSE: A digital predistortion compensating apparatus for preventing divergence of an output of an amplifier and a method using the same are provided to secure the linearity of the amplifier by preventing diverging the output of the amplifier. CONSTITUTION: A digital predistortion compensating apparatus(10) includes a digital predistortion filter, a power amplifier(40), and a filter coefficient control unit. The digital predistortion filter receives a predistortion coefficient and predistorts an input signal. The power amplifier amplifies an output of a predistorter. The filter coefficient control unit receives a coupled signal among the input signal and the output of the power amplifier, performs a previously stored algorithm, calculates a filter coefficient and provides the filter coefficient to the digital predistortion filter. [Reference numerals] (10) DPD compensator; (100) DPP filter; (220) DPD algorithm execution unit; (240) Filter coefficient providing unit; (30) RF up converter; (40) Power amplifier; (50) RF down converter
Abstract translation: 目的：提供一种用于防止放大器的输出发散的数字预失真补偿装置及其使用方法，以通过防止放大器的输出发散来确保放大器的线性度。 构成：数字预失真补偿装置（10）包括数字预失真滤波器，功率放大器（40）和滤波器系数控制单元。 数字预失真滤波器接收预失真系数并预调制输入信号。 功率放大器放大预失真器的输出。 滤波器系数控制单元接收输入信号和功率放大器的输出之间的耦合信号，执行先前存储的算法，计算滤波器系数，并将滤波器系数提供给数字预失真滤波器。 （附图标记）（10）DPD补偿器; （100）DPP过滤器; （220）DPD算法执行单元; （240）滤波系数提供单元; （30）RF上变频器; （40）功率放大器; （50）射频下变频器
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公开(公告)号：KR1020130061959A
公开(公告)日：2013-06-12
申请号：KR1020110128295
申请日：2011-12-02
Applicant: 한국전자통신연구원
CPC classification number: H04L25/0232 , H04B17/21 , H04L5/0048
Abstract: PURPOSE: A method for measuring EVM(Error Vector Magnitude) is provided to simply measure a performance index of a transmitter for various references or check the same through simulation, thereby saving expenses and time required for design of a transmitting system. CONSTITUTION: A transmitter generates symbols which are composed of pilots only and a symbol which is composed of data only(S210). The transmitter generates reference points corresponding to each pilot symbol(S220). The transmitter compensates a channel based on the final reference point(S230). The transmitter determines a receiving value for the data symbol based on the final reference point, and EVM is calculated based on determined data(S240). [Reference numerals] (AA) Start; (BB) End; (S210) Generate a symbol which are composed of pilots only and a symbol which is composed of data only, (Symbol P1, P2, P3) + (Symbol D1); (S220) Obtain reference points from each of the pilot symbols(Symbol P1, P2, P3) for synchronization and channel estimation; (S230) Compensate a channel by leveling the multiple reference points; (S240) Inspect EVM for the data symbol(Symbol D1) based on the compensated channel
Abstract translation: 目的：提供一种用于测量EVM（误差矢量幅度）的方法，简单地测量发射机对各种参考的性能指标或通过仿真来检查发射机的性能指标，从而节省了传输系统设计所需的费用和时间。 构成：发射机产生仅由导频组成的符号和仅由数据组成的符号（S210）。 发射机产生对应于每个导频符号的参考点（S220）。 发射机根据最终参考点补偿一个通道（S230）。 发射机基于最终参考点确定数据符号的接收值，并且基于确定的数据来计算EVM（S240）。 （附图标记）（AA）开始; （BB）结束; （S210）生成仅由导频构成的符号和仅由数据构成的符号（符号P1，P2，P3）+（符号D1）; （S220）从用于同步和信道估计的每个导频符号（符号P1，P2，P3）获取参考点; （S230）通过调平多个参考点来补偿通道; （S240）根据补偿通道检查数据符号（符号D1）的EVM
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Patent Agency Ranking
公开(公告)号：KR101201207B1
公开(公告)日：2012-11-15
申请号：KR1020080120955
申请日：2008-12-02
Applicant: 한국전자통신연구원
IPC: H04J11/00
CPC classification number: H04L27/2647 , H03G3/3068
Abstract: 본 발명은 무선 통신 시스템의 수신기의 이득 제어 장치 및 방법에 관한 것으로, 특히 다중밴드 OFDM 방식을 사용하는 시스템의 수신기에서 이득 제어 장치 및 방법에 관한 것이다.
본 발명의 일 실시 예에 따른 장치는, 다중밴드 OFDM 방식을 사용하는 무선통신 시스템의 수신기에서 수신 신호의 이득을 조정하기 위한 장치로서, 수신된 신호를 제1자동 이득 제어 신호에 의거하여 증폭하는 증폭기와, 상기 증폭된 신호를 디지털 신호로 변환하는 아날로그-디지털 변환기와, 각 수신 밴드마다 상기 디지털 변환된 신호에서 원하는 수신 밴드의 신호를 추출하며 추출된 신호의 이득을 제2자동 이득 제어 신호에 조정하는 밴드별 수신 신호 추출기들과, 상기 디지털 변환된 신호로부터 전체 밴드의 수신 전력값을 검출하여 출력하는 수신전력 검출기와, 상기 검출된 전체 밴드의 수신 전력값을 이용하여 상기 제1자동이득 제어 신호를 생성하고, 전체 밴드의 전력 정보 및 각 밴드별 자원할당 정보 및 수신 밴드별 수신 전력을 이용하여 상기 각 밴드별 수신 신호 추출기들로 제공할 상기 제2자동 이득 제어 신호를 생성하는 다중밴드 기저대역 처리부를 포함한다.
다중밴드, OFDM, 이득 제어, 자원할당-
公开(公告)号：KR1020120070145A
公开(公告)日：2012-06-29
申请号：KR1020100131579
申请日：2010-12-21
Applicant: 한국전자통신연구원
CPC classification number: H03F1/32 , H04B1/62 , H04B7/0619
Abstract: PURPOSE: A digital pre-distortion(DPD) amplifying device in a multiple antenna system is provided to prevent the increase of system sizes and costs by sharing a DPD feedback path and a DPD algorithm processing part. CONSTITUTION: Correcting parts(411 to 414) pre-distort input signals to be output and output the pre-distorted signals through antennas(441 to 444). Power amplifiers(431 to 434) are in connection with the correcting parts and amplify and output the pre-distorted signals. A distorted information extractor(450) extracts distorted information from feedback signals from the power amplifiers and from the input signals and output the distorted information to the correcting parts.
Abstract translation: 目的：提供多天线系统中的数字预失真（DPD）放大装置，以通过共享DPD反馈路径和DPD算法处理部分来防止系统尺寸和成本的增加。 构成：校正部分（411至414）预失真输出信号以输出，并通过天线输出预失真信号（441至444）。 功率放大器（431至434）与校正部分相连，并放大并输出预失真信号。 失真的信息提取器（450）从功率放大器和输入信号的反馈信号中提取失真的信息，并将失真的信息输出到校正部分。
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公开(公告)号：KR1020120054368A
公开(公告)日：2012-05-30
申请号：KR1020100115713
申请日：2010-11-19
Applicant: 한국전자통신연구원
CPC classification number: H03G1/0088
Abstract: PURPOSE: A variable gain amplifier having a fixed band width is provided to reduce influence on output voltage swing by connecting a variable current source to an input node. CONSTITUTION: An operational amplifier(110) amplifies a voltage applied to an non-inverted input terminal and an inverted input terminal. A variable feedback impedance part(120) is connected between the inverted input terminal and an output terminal of the operational amplifier. A compensation impedance value of a variable compensation impedance part(130) selectively connects each compensation impedance element and each MOS(Metal Oxide Semiconductor) transistor between the inverted input terminal of the operational amplifier and the earth. A variable current source(140) is connected to the inverted input terminal of the operational amplifier. A control circuit(150) includes a look-up table having information about gain control.
Abstract translation: 目的：提供具有固定带宽的可变增益放大器，以通过将可变电流源连接到输入节点来减小对输出电压摆幅的影响。 构成：运算放大器（110）放大施加到非反相输入端子和反相输入端子的电压。 可变反馈阻抗部分（120）连接在反相输入端和运算放大器的输出端之间。 可变补偿阻抗部分（130）的补偿阻抗值选择性地连接运算放大器的反相输入端和地之间的每个补偿阻抗元件和每个MOS（金属氧化物半导体）晶体管。 可变电流源（140）连接到运算放大器的反相输入端。 控制电路（150）包括具有关于增益控制的信息的查找表。
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公开(公告)号：KR1020110067872A
公开(公告)日：2011-06-22
申请号：KR1020090124647
申请日：2009-12-15
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2623 , H04L27/2628
Abstract: PURPOSE: A PAPR(Peak to Average Power Ratio) reduction apparatus and orthogonal frequency division multiplexing system for the same are provided to reduce the PAPR phenomenon of a signal that is modulated in two or more modulation methods. CONSTITUTION: A clipping level determining unit(620) determines a clipping level for PAPR reduction based on complex modulation method information and average voltage of a modulated signal. A clipping unit(600) clips the signal which is complexly modulated to the determined clipping level. The clipping level determining unit receives the average voltage from a modulating unit. The clipping unit performs nonlinear clipping by using a log function.
Abstract translation: 目的：提供一种PAPR（峰均功率比）降低装置及其正交频分复用系统，以减少以两种或多种调制方式调制的信号的PAPR现象。 构成：削波电平确定单元（620）基于复调制方法信息和调制信号的平均电压来确定用于PAPR降低的限幅电平。 剪切单元（600）将被复制调制的信号剪切到所确定的限幅电平。 限幅电平确定单元从调制单元接收平均电压。 剪辑单元通过使用日志功能执行非线性剪辑。
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公开(公告)号：KR1020110030287A
公开(公告)日：2011-03-23
申请号：KR1020100062781
申请日：2010-06-30
Applicant: 한국전자통신연구원
CPC classification number: H03F1/3247 , H03F1/3294 , H03F3/24 , H03F2201/3224 , H03F2201/3233
Abstract: PURPOSE: A pre-distortion device of a power amplifier and a method thereof are provided to fix a bias voltage of a power amplifier while a complex correction coefficient is updated, thereby distortion of a signal outputted from the power amplifier. CONSTITUTION: A pre-distortion unit(210) calculates the size of an input signal. The pre-distortion unit generates a pre-distortion signal of the input signal by outputting a complex correction coefficient corresponding to the size of the input signal. The pre-distortion unit provides the generated pre-distortion signal as input of the power amplifier. A complex correction coefficient updating unit(240) generates an error signal by comparing an output signal with the input signal of the power amplifier. The complex correction coefficient updating unit updates the complex correction coefficient to minimize the size of the generated error signal. The pre-distortion unit provides a fixed bias voltage value to the power amplifier while the complex correction coefficient is updated.
Abstract translation: 目的：提供功率放大器的预失真装置及其方法，以在复位校正系数更新时固定功率放大器的偏置电压，从而从功率放大器输出的信号失真。 构成：预失真单元（210）计算输入信号的大小。 预失真单元通过输出与输入信号的大小对应的复数校正系数，生成输入信号的预失真信号。 预失真单元提供所产生的预失真信号作为功率放大器的输入。 复数校正系数更新单元（240）通过将输出信号与功率放大器的输入信号进行比较来产生误差信号。 复数校正系数更新单元更新复数校正系数以最小化所生成的误差信号的大小。 预失真单元向功率放大器提供固定的偏置电压值，同时更新复数校正系数。
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