公开(公告)号：US08693572B2

公开(公告)日：2014-04-08

申请号：US13545691

申请日：2012-07-10

申请人： Gweon Do Jo ,  Chang Wahn Yu ,  Heon Kook Kwon ,  Byung Su Kang ,  Kwang Chun Lee

发明人： Gweon Do Jo ,  Chang Wahn Yu ,  Heon Kook Kwon ,  Byung Su Kang ,  Kwang Chun Lee

IPC分类号： H04L27/12

CPC分类号： H03M7/6023 ,  H04L27/26

摘要： The method for transmitting a signal of an orthogonal frequency division multiplexing type according to an exemplary embodiment of the present invention has a configuration allowing a radio unit (RU) to perform a component adding a compression component and a decompression component before/after a serial interface interlocking between a digital unit (DU) and the radio unit (RU) and a component inserting a cyclic prefix (CP) into a signal so as to secure orthogonality of an orthogonal frequency division multiplexing (OFDM) signal, in a structure in which a base station is physically divided into the DU and the RU.

摘要翻译： 根据本发明的示例性实施例的用于发送正交频分复用类型的信号的方法具有允许无线电单元（RU）在串行接口之前/之后执行添加压缩分量和解压缩分量的分量的配置 在数字单元（DU）和无线电单元（RU）之间互锁，以及将一个循环前缀（CP）插入到信号中以便确保正交频分复用（OFDM）信号的正交性的组件，其中 基站在物理上分为DU和RU。

公开(公告)号：US20120154040A1

公开(公告)日：2012-06-21

申请号：US13330986

申请日：2011-12-20

申请人： Young Hoon KIM ,  Gweon Do JO ,  Kwang Chun LEE

发明人： Young Hoon KIM ,  Gweon Do JO ,  Kwang Chun LEE

IPC分类号： H03F1/26

CPC分类号： H03F1/3247 ,  H03F1/3258 ,  H03F3/189 ,  H03F3/24 ,  H03F2201/3212

摘要： 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.

摘要翻译： 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。

公开(公告)号：US08174328B2

公开(公告)日：2012-05-08

申请号：US12860530

申请日：2010-08-20

申请人： Bong-Hyuk Park ,  Kwang-Chun Lee ,  Hyun-Kyu Chung

发明人： Bong-Hyuk Park ,  Kwang-Chun Lee ,  Hyun-Kyu Chung

IPC分类号： H03B21/01 ,  H03B21/02 ,  H03B21/04 ,  H03B27/00 ,  H04B1/26 ,  H04B1/28

CPC分类号： H03L7/099

摘要： A dual-band wideband local oscillation signal generator includes an oscillation unit, a division unit, a poly phase filter (PPF), a switch unit, and a single side band (SSB) mixer. The oscillation unit is configured to generate a positive in-phase (IP) signal, a negative in-phase (IN) signal, a negative quadrature-phase (QN) signal, and a positive quadrature-phase (QP) signal. The division unit is configured to divide frequencies of the IP signal and the IN signal and generate an RF signal. The PPF is configured to receive the IP signal and the IN signals inputted to the division unit, and generate an LO IP signal, an LO IN signal, an LO QP signal, and an LO QN signal. The switch unit is configured to receive the generated LO signals and select a high band frequency signal or a low band frequency signal.

摘要翻译： 双频宽带本地振荡信号发生器包括振荡单元，分频单元，多相滤波器（PPF），开关单元和单边带（SSB）混频器。 振荡单元被配置为产生正同相（IP）信号，负同相（IN）信号，负正交相位（QN）信号和正正交相位（QP）信号。 分割单元被配置为分配IP信号和IN信号的频率并产生RF信号。 PPF被配置为接收输入到分割单元的IP信号和IN信号，并且生成LO IP信号，LO IN信号，LO QP信号和LO QN信号。 开关单元被配置为接收所生成的LO信号并选择高频带信号或低频信号。

公开(公告)号：US20120100820A1

公开(公告)日：2012-04-26

申请号：US13344029

申请日：2012-01-05

申请人： Sung-Jun LEE ,  Heon-Kook KWON ,  Myung-Don KIM ,  Hyun-Kyu CHUNG ,  Kwang-Chun LEE

发明人： Sung-Jun LEE ,  Heon-Kook KWON ,  Myung-Don KIM ,  Hyun-Kyu CHUNG ,  Kwang-Chun LEE

IPC分类号： H04B17/00

CPC分类号： H04L1/20

摘要： Provided are a method for measuring a variable bandwidth wireless channel, and a transmitter and a receiver therefor. The transmitter, includes: a pre-processing unit for performing variable over-sampling and band-limited filtering on an original sequence for measuring the wireless channel according to a pre-determined digital-to-analog (D/A) operation speed and measurement bandwidth, and creating and storing a probing sequence whose frequency is up-converted into a fixed transmitting intermediate frequency; and a real-time processing unit for transmitting a probing signal that the stored probing sequence is converted according to the D/A operation speed to the wireless channel.

摘要翻译： 提供了一种用于测量可变带宽无线信道的方法，以及用于其的发射机和接收机。 发射机包括：预处理单元，用于根据预定的数模（D / A）操作速度和测量对原始序列进行可变过采样和带限滤波，以测量无线信道 带宽，以及创建和存储其频率被上变频成固定发射中频的探测序列; 以及实时处理单元，用于将存储的探测序列根据D / A操作速度转换的探测信号发送到无线信道。

公开(公告)号：US08140020B2

公开(公告)日：2012-03-20

申请号：US12443689

申请日：2007-09-21

申请人： Joon-Hyung Kim ,  Jae-Ho Jung ,  Heon-Kook Kwon ,  Kwang-Chun Lee

发明人： Joon-Hyung Kim ,  Jae-Ho Jung ,  Heon-Kook Kwon ,  Kwang-Chun Lee

IPC分类号： H04B17/00

CPC分类号： H04B7/06 ,  H04B17/21

摘要： There is provided to an RF calibration apparatus and method for a multi-antenna mobile communication system, which calibrates a phase error and gain error of an RF path by calculating the minimum value of a sum of an initialized reference signal and a comparison signal by a simple operation and controlling the phase value of a phase converter and the gain of a variable amplifier on the RF path, in calibrating the RF path of a multi-antenna mobile communication system of a TDD (Time Division Duplexing) type or FDD (Frequency Division Duplexing) type.

摘要翻译： 提供给用于多天线移动通信系统的RF校准装置和方法，其通过计算初始化的参考信号和比较信号的和的最小值来校准RF路径的相位误差和增益误差 简单的操作和控制相位转换器的相位值和RF路径上的可变放大器的增益，以校准TDD（时分双工）类型或FDD（频分方式）的多天线移动通信系统的RF路径 双工）类型。

公开(公告)号：US08112040B2

公开(公告)日：2012-02-07

申请号：US11951522

申请日：2007-12-06

申请人： Sung-Jun Lee ,  Heon-Kook Kwon ,  Myung-Don Kim ,  Hyun-Kyu Chung ,  Kwang-Chun Lee

发明人： Sung-Jun Lee ,  Heon-Kook Kwon ,  Myung-Don Kim ,  Hyun-Kyu Chung ,  Kwang-Chun Lee

IPC分类号： H04B17/00

CPC分类号： H04L1/20

摘要： Provided are a method for measuring a variable bandwidth wireless channel, and a transmitter and a receiver therefore. The transmitter, includes: a pre-processing unit for performing variable over-sampling and band-limited filtering on an original sequence for measuring the wireless channel according to a pre-determined digital-to-analog (D/A) operation speed and measurement bandwidth, and creating and storing a probing sequence whose frequency is up-converted into a fixed transmitting intermediate frequency; and a real-time processing unit for transmitting a probing signal that the stored probing sequence is converted according to the D/A operation speed to the wireless channel.

摘要翻译： 因此，提供了一种用于测量可变带宽无线信道的方法，以及发射机和接收机。 发射机包括：预处理单元，用于根据预定的数模（D / A）操作速度和测量对原始序列进行可变过采样和带限滤波，以测量无线信道 带宽，以及创建和存储其频率被上变频成固定发射中频的探测序列; 以及实时处理单元，用于将存储的探测序列根据D / A操作速度转换的探测信号发送到无线信道。

公开(公告)号：US08102214B2

公开(公告)日：2012-01-24

申请号：US12868468

申请日：2010-08-25

申请人： Bong-Hyuk Park ,  Kwang-Chun Lee

发明人： Bong-Hyuk Park ,  Kwang-Chun Lee

IPC分类号： H03F1/34

CPC分类号： H03F1/223 ,  H03F1/342 ,  H03F3/19 ,  H03F3/72 ,  H03F2200/294 ,  H03F2200/36 ,  H03F2200/408 ,  H03F2203/7209

摘要： Provided is controlled-gain wideband feedback low-noise amplifier. The controlled-gain wideband feedback low-noise amplifier includes: a feedback amplifier configured to isolate an input signal and an output signal obtained by amplifying the input signal, feed back the output signal to the input signal to amplify wideband input signals, resonate a low-frequency band signal among the wideband input signals to amplify the low-frequency band signal among the wideband input signals, and be switched in accordance with a control signal to control an amplification gain of the low-frequency band signal among the wideband input signals; and a cascode amplifier configured to amplify a high-frequency band signal among the wideband signals inputted from the feedback amplifier, and be switched in accordance with a control signal to control an amplification gain of the high-frequency band signal among the wideband signals.

摘要翻译： 提供控制增益宽带反馈低噪声放大器。 受控增益宽带反馈低噪声放大器包括：反馈放大器，被配置为隔离输入信号和通过放大输入信号获得的输出信号，将输出信号反馈到输入信号以放大宽带输入信号，共振低 宽频带输入信号中的频带信号，以放大宽带输入信号之中的低频带信号，并根据控制信号进行切换，以控制宽带输入信号中的低频带信号的放大增益; 以及级联放大器，被配置为放大从反馈放大器输入的宽带信号中的高频带信号，并且根据控制信号进行切换，以控制宽带信号中的高频带信号的放大增益。

公开(公告)号：US20110140746A1

公开(公告)日：2011-06-16

申请号：US12860530

申请日：2010-08-20

申请人： Bong-Hyuk PARK ,  Kwang-Chun Lee ,  Hyun-Kyu Chung

发明人： Bong-Hyuk PARK ,  Kwang-Chun Lee ,  Hyun-Kyu Chung

IPC分类号： H03L7/08

CPC分类号： H03L7/099

摘要： A dual-band wideband local oscillation signal generator includes an oscillation unit, a division unit, a poly phase filter (PPF), a switch unit, and a single side band (SSB) mixer. The oscillation unit is configured to generate a positive in-phase (IP) signal, a negative in-phase (IN) signal, a negative quadrature-phase (QN) signal, and a positive quadrature-phase (QP) signal. The division unit is configured to divide frequencies of the IP signal and the IN signal and generate an RF signal. The PPF is configured to receive the IP signal and the IN signals inputted to the division unit, and generate an LO IP signal, an LO IN signal, an LO QP signal, and an LO QN signal. The switch unit is configured to receive the generated LO signals and select a high band frequency signal or a low band frequency signal.

摘要翻译： 双频宽带本地振荡信号发生器包括振荡单元，分频单元，多相滤波器（PPF），开关单元和单边带（SSB）混频器。 振荡单元被配置为产生正同相（IP）信号，负同相（IN）信号，负正交相位（QN）信号和正正交相位（QP）信号。 分割单元被配置为分配IP信号和IN信号的频率并产生RF信号。 PPF被配置为接收输入到分割单元的IP信号和IN信号，并且生成LO IP信号，LO IN信号，LO QP信号和LO QN信号。 开关单元被配置为接收所生成的LO信号并选择高频带信号或低频信号。

公开(公告)号：US20100135421A1

公开(公告)日：2010-06-03

申请号：US12517925

申请日：2007-11-28

申请人： Jae-Ho Jung ,  Kwang Chun Lee ,  Sung Bin Im

发明人： Jae-Ho Jung ,  Kwang Chun Lee ,  Sung Bin Im

IPC分类号： H04L27/28

CPC分类号： H04L27/2623

摘要： An apparatus for reducing PAPR (Peack to Average Power Ratio) in an OFDM (Orthogonal Frequency Division Multiplexing) system includes: an IFFT (Inverse Fast Fourier Transform) unit for performing an IFFT on an input data stream modulated using a specific constellation to generate time-domain signals; a time-domain clipping unit for performing a time-domain clipping on the time-domain signals at a clipping level determined by characteristics of the time-domain signals; an FFT (Fast Fourier Transform) unit for performing an FFT on the clipped time-domain signals to generate frequency-domain signals; and a frequency-domain clipping unit for performing a frequency-domain clipping on the frequency-domain signals. The time-domain clipping reduces in the OFDM system, and the frequency-domain clipping reduces distortions generated by the time-domain clipping.

摘要翻译： 一种用于减少OFDM（正交频分复用）系统中的PAPR（Peack to Average Power Ratio）的装置，包括：用于对使用特定星座调制的输入数据流执行IFFT的IFFT（快速傅里叶逆变换）单元，以产生时间 域信号 时域剪辑单元，用于以由所述时域信号的特性确定的限幅电平对所述时域信号执行时域限幅; FFT（Fast Fourier Transform，快速傅里叶变换）单元，用于对所述经限幅的时域信号执行FFT以产生频域信号; 以及用于对频域信号执行频域限幅的频域限幅单元。 OFDM系统中的时域削波减少，频域削波减少了由时域削波产生的失真。

公开(公告)号：US20100056083A1

公开(公告)日：2010-03-04

申请号：US12443689

申请日：2007-09-21

申请人： Joon-Hyung Kim ,  Jae-Ho Jung ,  Heon-Kook Kwon ,  Kwang-Chun Lee

发明人： Joon-Hyung Kim ,  Jae-Ho Jung ,  Heon-Kook Kwon ,  Kwang-Chun Lee

IPC分类号： H04B17/00

CPC分类号： H04B7/06 ,  H04B17/21

摘要： There is provided to an RF calibration apparatus and method for a multi-antenna mobile communication system, which calibrates a phase error and gain error of an RF path by calculating the minimum value of a sum of an initialized reference signal and a comparison signal by a simple operation and controlling the phase value of a phase converter and the gain of a variable amplifier on the RF path, in calibrating the RF path of a multi-antenna mobile communication system of a TDD (Time Division Duplexing) type or FDD (Frequency Division Duplexing) type.

摘要翻译： 提供给用于多天线移动通信系统的RF校准装置和方法，其通过计算初始化的参考信号和比较信号的和的最小值来校准RF路径的相位误差和增益误差 简单的操作和控制相位转换器的相位值和RF路径上的可变放大器的增益，以校准TDD（时分双工）类型或FDD（频分方式）的多天线移动通信系统的RF路径 双工）类型。