公开(公告)号：US08421534B2

公开(公告)日：2013-04-16

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：US08767853B2

公开(公告)日：2014-07-01

申请号：US13587296

申请日：2012-08-16

申请人： Chang Wahn Yu ,  Gweon Do Jo ,  Jung Hoon Oh ,  Kwang Chun Lee ,  Jae Ho Jung

发明人： Chang Wahn Yu ,  Gweon Do Jo ,  Jung Hoon Oh ,  Kwang Chun Lee ,  Jae Ho Jung

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L5/0007 ,  H04L27/2614 ,  H04L27/2627

摘要： 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.

摘要翻译： 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。

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：US20120176688A1

公开(公告)日：2012-07-12

申请号：US13064661

申请日：2011-04-06

申请人： Hye Ran Oh ,  Kwang Chun Lee ,  In Cheol Chang ,  Young Su Jin

发明人： Hye Ran Oh ,  Kwang Chun Lee ,  In Cheol Chang ,  Young Su Jin

IPC分类号： G02B9/08 ,  B05D5/06

CPC分类号： B29D11/0073

摘要： There is provided a method of manufacturing a lens, including applying a second lens material to a first lens member made of a first lens material; aligning and fixing a light shielding member to the second lens material; and further applying the second lens material to the first lens member and performing curing thereon to complete a second lens member.

摘要翻译： 提供一种制造透镜的方法，包括将第二透镜材料施加到由第一透镜材料制成的第一透镜构件; 将遮光构件对准并固定到第二透镜材料上; 并且还将第二透镜材料施加到第一透镜构件并在其上进行固化以完成第二透镜构件。

公开(公告)号：US06341147B1

公开(公告)日：2002-01-22

申请号：US09414777

申请日：1999-10-08

申请人： Sang Soo Oak ,  Woo Jin Song ,  Kwang Chun Lee

发明人： Sang Soo Oak ,  Woo Jin Song ,  Kwang Chun Lee

IPC分类号： H03D100

CPC分类号： H04L7/0062 ,  H04L7/0334

摘要： A maximum likelihood timing recovering unit is disclosed, which includes a sampler for over-sampling a matched filtering signal, first and second delay units for sequentially delaying a sampling signal of the sampler, a first decimeter for outputting a decision sample among an output signal of the first delay unit to a symbol decision unit, an adder for adding an output of the sampler and an output of the second delay unit, a multiplier for multiplying a decision symbol ak received in a preamble format and an output signal of the adder, a second decimeter for outputting a certain interval value based on a decision sample position among the output of the multiplier, an accumulator for accumulating the output of the second decimeter at a certain interval, and a voltage adjusting oscillator for providing an oscillation frequency generated using the output of the accumulator as an adjusting voltage to a 2Fs sampling clock signal of the sampler, for thereby recovering an optimum timing using a data over-sampled by adjusting an oscillation speed of a voltage adjusting oscillator by two times.

摘要翻译： 公开了一种最大似然定时恢复单元，其包括用于对匹配滤波信号进行过采样的采样器，用于顺序地延迟采样器的采样信号的第一和第二延迟单元，用于输出采样信号的输出信号 第一延迟单元到符号判定单元，用于将采样器的输出和第二延迟单元的输出相加的加法器，用于将以前导格式接收的判定符号ak和加法器的输出信号相乘的乘法器， 第二分米，用于基于乘法器的输出中的判定取样位置输出一定间隔值;累加器，用于以一定间隔累积第二分米的输出;以及电压调节振荡器，用于提供使用该输出产生的振荡频率 作为调制电压的采样器的2Fs采样时钟信号，从而恢复最佳定时 g通过将电压调节振荡器的振荡速度调整两倍来过采样的数据。

公开(公告)号：US08369033B2

公开(公告)日：2013-02-05

申请号：US13064661

申请日：2011-04-06

申请人： Hye Ran Oh ,  Kwang Chun Lee ,  In Cheol Chang ,  Young Su Jin

发明人： Hye Ran Oh ,  Kwang Chun Lee ,  In Cheol Chang ,  Young Su Jin

IPC分类号： G02B9/00 ,  G02B3/08 ,  B29D11/00

CPC分类号： B29D11/0073

摘要： There is provided a method of manufacturing a lens, including applying a second lens material to a first lens member made of a first lens material; aligning and fixing a light shielding member to the second lens material; and further applying the second lens material to the first lens member and performing curing thereon to complete a second lens member.

摘要翻译： 提供一种制造透镜的方法，包括将第二透镜材料施加到由第一透镜材料制成的第一透镜构件; 将遮光构件对准并固定到第二透镜材料上; 并且还将第二透镜材料施加到第一透镜构件并在其上进行固化以完成第二透镜构件。

公开(公告)号：US20120182836A1

公开(公告)日：2012-07-19

申请号：US13496870

申请日：2010-09-17

申请人： Byung-Jae Kwak ,  Kwang Chun Lee ,  Hyun Kyu Chung ,  Nah-Oak Song

发明人： Byung-Jae Kwak ,  Kwang Chun Lee ,  Hyun Kyu Chung ,  Nah-Oak Song

IPC分类号： G01S3/80 ,  H04B11/00

CPC分类号： H04B11/00

摘要： Disclosed is a technology for performing a communication using an ultrasonic wave in an environment where an electromagnetic shielding is so severe that a wireless communication using an electromagnetic is difficult. In the environment where the electromagnetic shielding is severe, an ultrasonic terminal according to the present invention may transmit the ultrasonic wave using a solid structure as a medium, and an ultrasonic base station may receive the ultrasonic wave using the solid structure as the medium.

摘要翻译： 公开了一种在电磁屏蔽严重使得使用电磁波的无线通信困难的环境中使用超声波进行通信的技术。 在电磁屏蔽严重的环境中，根据本发明的超声波端子可以使用固体结构作为介质传输超声波，并且超声波基站可以使用固体结构作为介质接收超声波。

公开(公告)号：US20120177819A1

公开(公告)日：2012-07-12

申请号：US13064618

申请日：2011-04-04

申请人： Kwang Chun Lee ,  Young Su Jin ,  Hye Ran Oh

发明人： Kwang Chun Lee ,  Young Su Jin ,  Hye Ran Oh

IPC分类号： B05D5/06

CPC分类号： B29D11/0073 ,  B29D11/00298 ,  B29D11/00442

摘要： There is provided a method of manufacturing a lens, including: forming a first lens layer having a protrusion and a groove part formed on a first surface thereof; forming a light shielding layer on the first surface; and forming a second lens on the first surface.

摘要翻译： 提供一种制造透镜的方法，包括：形成具有突起的第一透镜层和形成在其第一表面上的凹槽部分; 在所述第一表面上形成遮光层; 以及在所述第一表面上形成第二透镜。

公开(公告)号：US08165250B2

公开(公告)日：2012-04-24

申请号：US12329854

申请日：2008-12-08

申请人： Jae Ho Jung ,  Kwang Chun Lee

发明人： Jae Ho Jung ,  Kwang Chun Lee

IPC分类号： H04L27/08

CPC分类号： H04L27/2662

摘要： An apparatus and method of receiving signal are provided. The apparatus includes an amplifier that controls a gain according to a gain control signal and amplifies a received signal to generate an amplified signal, an analog-to-digital (A/D) converter that converts the amplified signal into a digital signal, a Fourier transform unit that performs Fourier transform of the digital signal to a frequency domain signal to generate a Fourier transform signal, a demodulator that demodulates the Fourier transform signal to generate a demodulated signal, and an automatic gain control unit that divides the Fourier transform signal into a noise period and a symbol period, calculates the signal level of the noise period based on the signal level of the symbol period, and generates the gain control signal according to the signal levels of the symbol period and the noise period.

摘要翻译： 提供了一种接收信号的装置和方法。 该装置包括放大器，其根据增益控制信号控制增益并放大接收信号以产生放大信号;模数（A / D）转换器，其将放大的信号转换为数字信号;傅立叶 变换单元，其将数字信号的傅里叶变换转换为频域信号以产生傅立叶变换信号;解调器，其解调所述傅里叶变换信号以产生解调信号;以及自动增益控制单元，其将所述傅立叶变换信号分割为 噪声周期和符号周期，基于符号周期的信号电平来计算噪声周期的信号电平，并根据符号周期和噪声周期的信号电平生成增益控制信号。

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。