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    • 1. 发明授权
    • Apparatus and method for controlling distortion signal and system by using the same
    • 用于控制失真信号和系统的装置和方法
    • US08767853B2
    • 2014-07-01
    • US13587296
    • 2012-08-16
    • Chang Wahn YuGweon Do JoJung Hoon OhKwang Chun LeeJae Ho Jung
    • Chang Wahn YuGweon Do JoJung Hoon OhKwang Chun LeeJae Ho Jung
    • H04K1/10H04L27/28
    • H04L5/0007H04L27/2614H04L27/2627
    • Disclosed are a signal distortion component adjusting apparatus and method capable of adjusting error vector magnitude of subcarriers of a predetermined position by adjusting a signal distortion component occurring while decreasing a peak to average power ratio (PAPR) in a communication system of an orthogonal frequency division multiplexing (OFDM) technology or an orthogonal frequency division multiple access (OFDMA) scheme, and a system using the same. The present invention includes a signal distortion component adjusting unit to add an additional signal distortion component Pe((n+N/2) % N) to a signal distortion component e(n) that is obtained by subtracting a threshold Th value, set to decrease peak power, from an absolute value of a time domain signal x(n) of an input signal, and to thereby adjust the signal distortion component. The present invention may transmit a highly reliable signal by adjusting error vector magnitude of subcarrier of a frequency domain.
    • 公开了一种信号失真分量调整装置和方法,其能够通过调整在正交频分复用的通信系统中降低峰均功率比(PAPR)的同时发生的信号失真分量来调整预定位置的子载波的误差矢量幅度 (OFDM)技术或正交频分多址(OFDMA)方案,以及使用它们的系统。 本发明包括一个信号失真分量调整单元,用于将附加信号失真分量Pe((n + N / 2)%N)加到通过将阈值Th值减去得到的信号失真分量e(n) 从输入信号的时域信号x(n)的绝对值减小峰值功率,从而调整信号失真分量。 本发明可以通过调整频域的子载波的误差矢量幅度来发送高度可靠的信号。
    • 3. 发明授权
    • Predistortion apparatuses and methods
    • 预失真装置和方法
    • US08704595B2
    • 2014-04-22
    • US13331377
    • 2011-12-20
    • Young-Hoon KimGweon Do JoJung Hoon OhJae Ho Jung
    • Young-Hoon KimGweon Do JoJung Hoon OhJae Ho Jung
    • H03F1/26
    • H03F1/3247H03F1/3258H03F2201/3209H03F2201/3212H03F2201/3224
    • Provided is a predistortion apparatus which performs predistortion by reflecting a memory effect when linearizing an output of a nonlinear device using a wideband signal. The predistortion apparatus includes a predistortion unit and a coefficient extraction unit. The predistortion unit selects and outputs one of outputs of the sub-predistorters as an output signal according to intensity of an input signal. The coefficient extraction unit selects one of a plurality of coefficient extractors according to intensity of a nonlinear signal which is generated in response to the output signal, extracts a plurality of predistortion coefficients with the nonlinear signal and the output signal, and delivers the extracted predistortion coefficients to the predistortion unit. Accordingly, the memory effect is reflected even when the input signal is a wideband signal.
    • 提供一种预失真装置,其通过使用宽带信号线性化非线性装置的输出来反映存储器效应来执行预失真。 预失真装置包括预失真单元和系数提取单元。 预失真单元根据输入信号的强度选择并输出副预失真器的输出之一作为输出信号。 系数提取单元根据输出信号产生的非线性信号的强度,选择多个系数提取器中的一个,用非线性信号和输出信号提取多个预失真系数,并将提取的预失真系数 到预失真单位。 因此,即使当输入信号是宽带信号时也会反映存储效应。
    • 4. 发明授权
    • Predistorter for compensating for nonlinear distortion and method thereof
    • 用于补偿非线性失真的预失真器及其方法
    • US08421534B2
    • 2013-04-16
    • US13330986
    • 2011-12-20
    • Young Hoon KimGweon Do JoKwang Chun Lee
    • Young Hoon KimGweon Do JoKwang Chun Lee
    • H03F1/26
    • H03F1/3247H03F1/3258H03F3/189H03F3/24H03F2201/3212
    • The predistorter may include: a predistortion filter predistorting an input signal to provide an output signal; a predistortion output estimation unit estimating the characteristics of a nonlinear device based on a signal processed by the nonlinear device and the output signal, and calculating a desired output signal of the predistortion filter by using the estimated characteristics of the nonlinear device; and an adaptive algorithm driving unit comparing the output signal with the desired output signal to output an error as a comparison result, calculating a filter coefficient according to which the calculated error is minimized, and providing the calculated filter coefficient to the predistortion filter in order to update a filter coefficient of the predistortion filter.
    • 预失真器可以包括:预失真滤波器预失真输入信号以提供输出信号; 预失真输出估计单元,基于由所述非线性装置处理的信号和所述输出信号来估计所述非线性装置的特性,以及通过使用所述非线性装置的估计特性来计算所述预失真滤波器的期望输出信号; 以及自适应算法驱动单元,将输出信号与期望的输出信号进行比较以输出误差作为比较结果,计算滤波器系数,根据该滤波器系数计算误差最小化,并将计算的滤波器系数提供给预失真滤波器,以便 更新预失真滤波器的滤波器系数。
    • 9. 发明授权
    • Method for encoding broadcast channel protocol data unit based on broadcast control channel scheduling error in universal mobile telecommunications system
    • 基于通用移动电信系统中的广播控制信道调度误差对广播信道协议数据单元进行编码的方法
    • US08121152B2
    • 2012-02-21
    • US11828105
    • 2007-07-25
    • Yunhee ChoJi Yeon KimGweon Do JoJin Up Kim
    • Yunhee ChoJi Yeon KimGweon Do JoJin Up Kim
    • H04J3/00
    • H04W48/12
    • A method for encoding a broadcast channel protocol data unit (BCH PDU) based on a broadcast control channel (BCCH) scheduling error in a universal mobile telecommunications system (UMTS) having a Node B and a radio network controller includes setting up a call between the radio network controller and the Node B to receive system information and scheduling information for a system information update from the radio network controller; initializing broadcast channel protocol data units and control information for every system frame number (SFN) at the Node B; and detecting the broadcast control channel scheduling error on the scheduling information for the system information update based on segment types of the system information when combining the system information for every system frame number. In case the broadcast control channel scheduling error is not detected, the broadcast channel protocol data units are encoded to be incorporated therein the system information.
    • 在具有节点B和无线网络控制器的通用移动通信系统(UMTS)中,基于广播控制信道(BCCH)调度误差对广播信道协议数据单元(BCH PDU)进行编码的方法包括: 无线电网络控制器和节点B从无线电网络控制器接收用于系统信息更新的系统信息和调度信息; 对节点B的每个系统帧号(SFN)初始化广播信道协议数据单元和控制信息; 以及当对于每个系统帧号组合系统信息时,基于系统信息的段类型来检测用于系统信息更新的调度信息的广播控制信道调度误差。 在没有检测到广播控制信道调度错误的情况下,广播信道协议数据单元被编码为并入其中的系统信息。