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公开(公告)号：KR1020100062350A
公开(公告)日：2010-06-10
申请号：KR1020080120954
申请日：2008-12-02
Applicant: 한국전자통신연구원
CPC classification number: H03G3/30 , H03F3/211 , H03F3/2176 , H03F3/24 , H04L27/361
Abstract: PURPOSE: A gain control device of a polar transmitter and a method thereof are provided to realize transmission gain control of a wide range by revising a change of size information according to a bandwidth of a signal efficiently. CONSTITUTION: A signal generating unit(201~207) modulates a transmission signal. A gain revising unit(209~213) extracts a transmission gain. The gain revising unit generates an envelope signal by a pulse signal of the signal generating unit. A power amplification module(208) performs power amplification and simple amplification operation based on the envelope signal. A gain control unit(214,215) decides the size of the generated signal of the signal generating unit by a power control signal.
Abstract translation: 目的：提供极性发射机的增益控制装置及其方法，通过根据信号的带宽有效地修改尺寸信息的改变来实现宽范围的传输增益控制。 构成：信号生成单元（201〜207）调制发送信号。 增益修正单元（209〜213）提取发送增益。 增益修正单元通过信号发生单元的脉冲信号产生包络信号。 功率放大模块（208）基于包络信号进行功率放大和简单的放大操作。 增益控制单元（214,215）通过功率控制信号来决定信号生成单元的生成信号的大小。
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公开(公告)号：KR1020100058189A
公开(公告)日：2010-06-03
申请号：KR1020080116915
申请日：2008-11-24
Applicant: 한국전자통신연구원
IPC: H04B7/26
CPC classification number: H04B1/0483 , H03F1/0227 , H03F3/245 , H03F2200/411 , H03K7/08 , H04W52/04
Abstract: PURPOSE: An apparatus and a method for transmitting a signal in a wireless communication system are provided to prevent the unnecessary power consumption by changing output range depending on the strength of an envelope signal. CONSTITUTION: A control unit(520) receives the power control information of a baseband signal, and a signal converter(530) outputs a phase signal after receiving the baseband signal. When the output mode signal of the control unit indicates a first output mode, the signal converter outputs an envelope signal. A phase modulator(540) performs an up-converting operation of the phase signal, and an amplification unit(550) performs the combination and the amplification of an up-converted phase signal and the envelope signal at the first output mode.
Abstract translation: 目的：提供一种用于在无线通信系统中发送信号的装置和方法，以通过根据包络信号的强度改变输出范围来防止不必要的功率消耗。 构成：控制部（520）接收基带信号的功率控制信息，信号转换器（530）在接收到基带信号后输出相位信号。 当控制单元的输出模式信号表示第一输出模式时，信号转换器输出包络信号。 相位调制器（540）执行相位信号的上变换操作，并且放大单元（550）在第一输出模式下执行上转换相位信号和包络信号的组合和放大。
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公开(公告)号：KR100854064B1
公开(公告)日：2008-08-25
申请号：KR1020070065075
申请日：2007-06-29
Applicant: 한국전자통신연구원 , 숭실대학교산학협력단
IPC: H04J11/00
CPC classification number: H04L27/2623
Abstract: 본 발명은 직교 주파수 분할 다중화 시스템에서 송신장치가 가지는 PAPR(Peak to Average Power Ratio) 현상을 극복하기 위한 송신장치 및 그 방법에 관한 것이다.
즉, 본 발명에서는 직교 주파수 분할 다중화 시스템의 송신신호 처리 방법에 있어서 시간 영역 신호에 대해서는 클리핑을 사용하여 원하는 PAPR을 갖는 신호를 발생시키고 이로 인해 발생하는 대역내 왜곡 (in-band distortion)과 대역외 왜곡 (out-of-band distortion)을 주파수 영역에서 클리핑과 필터링을 사용하여 감소시킨다. 이때, 대역내 왜곡은 성상도 오차를 초래하므로 이 오차는 성상도의 오차 벡터 크기 (error vector magnitude: EVM)에 의해서 정해지는 오차 한계내로 제한하는 주파수 영역 클리핑을 수행하고, 대역외 왜곡은 강제적으로 대역외 밴드에 영을 삽입함으로써 제거한다. 이러한 방식의 PAPR 감소기법을 통해 기존의 수신기 구조를 그대로 사용할 수 있으며 계산량이나 구현 방법이 간단하게 된다.
무선 시스템, PAPR, 성상도, 최적화 기법-
公开(公告)号：KR100763994B1
公开(公告)日：2007-10-08
申请号：KR1020060124498
申请日：2006-12-08
Applicant: 한국전자통신연구원
CPC classification number: H04B1/18
Abstract: An antenna matching device for varying a frequency bandwidth according to a mobile communication service and a transceiver having the same are provided to reduce the maximum transmission power required for each service by minimizing unnecessary emission power through matching with a suitable frequency band of a variable matching unit. An antenna matching controller(260) generates a pre-set switch control signal according to a service requested by the user. An antenna variable matching unit(220) variably configures a matching circuit according to the switch control signal transferred from the antenna matching controller(260), and varies a frequency band and a bandwidth. An analog processing unit(230) processes signals transmitted to or received from the antenna variable matching unit(220). A broadband antenna(210) transmits/receives an RF(Radio Frequency) according to the frequency band and the bandwidth set by the antenna variable matching unit(220).
Abstract translation: 提供了一种用于根据移动通信服务改变频率带宽的天线匹配装置和具有该天线匹配装置的收发机，用于通过与可变匹配单元的适当频带匹配来最小化不必要的发射功率来减少每个服务所需的最大发射功率 。 天线匹配控制器（260）根据用户请求的服务生成预置开关控制信号。 天线可变匹配单元（220）根据从天线匹配控制器（260）传送的开关控制信号可变地配置匹配电路，并且改变频带和带宽。 模拟处理单元（230）处理发送到天线可变匹配单元（220）或从天线可变匹配单元（220）接收的信号。 宽带天线（210）根据由天线可变匹配单元（220）设置的频带和带宽发送/接收RF（射频）。
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公开(公告)号：KR100746998B1
公开(公告)日：2007-08-07
申请号：KR1020050120845
申请日：2005-12-09
Applicant: 한국전자통신연구원
IPC: H04L27/26
Abstract: 본 발명은 직교 주파수 분할 다중 시스템에서 송신 전력 제어 장치 및 방법에 관한 것이다.
본 발명에서의 송신 전력 제어 장치는 단말 장치 수신단에 수신되는 신호의 전력에 따라 단말 장치의 송신 전력을 제어하는 경로를 구성하며, 이에 더하여 부채널 개수에 따라 송신 이득을 제어하고, 부채널 개수에 따라 전력 레벨을 조절할 수 있도록 구성함으로써 단말 장치가 사용하는 부채널의 전력 밀도를 제어할 수 있는 특징이 있다.
이로 인해 송신 전력 제어 장치는 단말 장치의 위치에 따라 전력 집중 기능의 사용 여부를 결정하고, 이에 따라 단말 장치와 기지국 장치의 거리 및 환경에 따른 단말 장치의 송신 전력을 제어할 수 있는 특징이 있다.
본 발명은 직교 주파수 분할 다중화 방식을 사용하는 통신 시스템용 단말 장치의 송신 전력 제어부를 효과적으로 구성하여 상하향 링크의 송신 전력의 불균형을 해소하는 전력 집중(Power Concentrate) 효과를 기대할 수 있다.
직교 주파수 분할 다중 시스템, 송신 전력, 디지털 송신 전력 제어기-
Patent Agency Ranking
公开(公告)号：KR1020070061110A
公开(公告)日：2007-06-13
申请号：KR1020060046846
申请日：2006-05-25
Applicant: 한국전자통신연구원
CPC classification number: H04B1/0028 , H04B1/0064 , H04B1/0071
Abstract: A wireless transmitting/receiving apparatus of a re-configurable software-defined wireless communication system is provided to reduce power consumption by controlling unnecessary power of an analog stage and prevent the generation of unnecessary leakage signals. A baseband stage(200) re-configures one of plural wireless communication standards by software and generates a control signal according to the re-configured wireless communication standard. A switch stage(210) selects one of plural analog paths based on the generated control signal, and switches a signal transmission line of the baseband stage to the selected analog path. An analog stage(220) converts a transmission signal of the baseband stage(200) according to the selected analog path and transmits it, or transmits a reception signal received from the outside as an input signal of the baseband stage(200) through the selected analog path.
Abstract translation: 提供了可重新配置的软件定义无线通信系统的无线发送/接收装置，通过控制模拟级的不必要的功率并防止产生不必要的泄漏信号来降低功耗。 基带级（200）通过软件重新配置多个无线通信标准中的一个，并根据重新配置的无线通信标准生成控制信号。 开关级（210）基于所生成的控制信号选择多个模拟路径中的一个，并将基带级的信号传输线切换到所选择的模拟路径。 模拟级（220）根据所选择的模拟路径转换基带级（200）的发送信号，并将其发送，或者通过所选择的发送从外部接收的接收信号作为基带级（200）的输入信号 模拟路径。
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公开(公告)号：KR100469897B1
公开(公告)日：2005-02-02
申请号：KR1020020081664
申请日：2002-12-20
Applicant: 한국전자통신연구원
IPC: H04B1/04
Abstract: PURPOSE: A method and system and transmitting multiple frequencies are provided to effectively remove an image signal. CONSTITUTION: Multiple baseband complex up-converts(1001-100n) include baseband modulator(1101-110n) and complex up-converters(1201-120n), respectively. Frequency-converted complex signals by frequency bands are separated into a real number component and an imaginary number component and then added in signal adders(210,220). A multi-frequency baseband signal processor(300) pre-distorts an input signal by multiplying a complex value of a transmission system which has been calculated in a signal processor to the input signal. A multi-complex IF up-converter(400) up-converts signals processed in the multi-frequency baseband signal processor(300) by turns to IF frequencies. An I/Q up-converter(500) includes a 90 degree phase shifter(520), mixers(530,540) and an adder(550).
Abstract translation: 目的：提供一种方法和系统并传输多个频率以有效地去除图像信号。 构成：多基带复数上变频器（1001-100n）分别包括基带调制器（1101-110n）和复数上变频器（1201-120n）。 通过频带将频率转换的复信号分成实数分量和虚数分量，然后加入信号加法器（210,220）。 多频率基带信号处理器（300）通过将在信号处理器中计算出的传输系统的复数值乘以输入信号来预失真输入信号。 多复合IF上变频器（400）将多频基带信号处理器（300）中处理的信号轮流上变频为IF频率。 I / Q上变频器（500）包括90度移相器（520），混频器（530,540）和加法器（550）。
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公开(公告)号：KR1020030034259A
公开(公告)日：2003-05-09
申请号：KR1020010047552
申请日：2001-08-07
Applicant: 한국전자통신연구원
IPC: H01Q3/22
CPC classification number: H01Q3/267
Abstract: PURPOSE: An error calibration apparatus is provided to enable data communication efficiently by adding a function of reducing an interference where an error calibration signal affects a signal received or transmitted from and to an array antenna. CONSTITUTION: An array antenna(101) includes a plurality of emission elements and is connected to an error calibration signal inserting part(102) and an array receiver(103). The array receiver(103) down-converts an RF-band signal which is received by the array antenna and transferred via the error calibration signal inserting part(102), and converts the down-converted signal into a digital signal. An error calibration signal generator(104) up-converts an error calibration signal generated in a base band into an RF band and generates an error calibration signal. The error calibration signal inserting part(102) divides an RF error calibration signal by a total channel number and multiplies a predetermined weight with each channel. An error calibration coefficient estimation part(105) correlates an error calibration signal passing the array receiver to the error calibration signal generated from the generator(104) and estimates a transfer function of the receiver(103) of each channel. An error calibration part(106) multiplies an error calibration coefficient to a digital signal from the array receiver and removes different transfer function components every channel. An array beam forming part(107) points to a visit direction of different signals.
Abstract translation: 目的：提供一种错误校准装置，通过增加减少误差校准信号影响从阵列天线接收或发射的信号的干扰的功能，有效地进行数据通信。 构成：阵列天线（101）包括多个发射元件，并连接到误差校准信号插入部分（102）和阵列接收器（103）。 阵列接收器（103）对由阵列天线接收并经由误差校准信号插入部分（102）传送的RF频带信号进行下变频，并将下变频信号转换为数字信号。 误差校准信号发生器（104）将在基带中产生的误差校准信号上变频成RF频带并产生误差校准信号。 误差校准信号插入部分（102）将RF误差校准信号除以总信道数，并将预定权重与每个信道相乘。 误差校准系数估计部分（105）使通过阵列接收器的误差校准信号与从发生器（104）产生的误差校准信号相关联，并估计每个通道的接收器（103）的传递函数。 误差校准部件（106）将误差校准系数与阵列接收器的数字信号相乘，并且每个通道去除不同的传递函数分量。 阵列波束形成部（107）指向不同信号的访问方向。
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