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1. 发明授权

US06341147B1 Maximum likelihood symbol timing estimator 失效
标题翻译：最大似然符号定时估计器
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。

2. 发明授权

US08767853B2 Apparatus and method for controlling distortion signal and system by using the same 有权
标题翻译：用于控制失真信号和系统的装置和方法
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。

3. 发明授权

US08421534B2 Predistorter for compensating for nonlinear distortion and method thereof 有权
标题翻译：用于补偿非线性失真的预失真器及其方法
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。

4. 发明申请

US20120176688A1 Method of manufacturing lens and lens manufactured using the same 失效
标题翻译：使用其制造透镜和透镜的方法
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。

5. 发明授权

US08693572B2 Method for transmitting signal of orthogonal frequency division multiplexing type, and apparatus applied to the same 失效
标题翻译：用于发送正交频分复用类型信号的方法及应用于其的装置
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。

6. 发明申请

US20100135421A1 APPARATUS AND METHOD FOR REDUCING PEAK TO AVERAGE POWER RATION IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 审中-公开
标题翻译：在正交频分复用系统中降低平均功率的峰值的装置和方法
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。

7. 发明授权

US07671692B2 Apparatus and method for compensating carrier feedthrough in quadrature modulation system 有权
标题翻译：正交调制系统补偿载波馈通的装置和方法
公开(公告)号：US07671692B2
公开(公告)日：2010-03-02
申请号：US12170715
申请日：2008-07-10
申请人： Heon Kook Kwon , Joon Hyung Kim , Byung Su Kang , Kwang Chun Lee
发明人： Heon Kook Kwon , Joon Hyung Kim , Byung Su Kang , Kwang Chun Lee
IPC分类号： H03C3/00 , H04L27/20
CPC分类号： H04L27/364 , H03C3/406
摘要： The present invention relates to an apparatus and a method for compensating carrier feedthrough in a quadrature modulation system. In order to suppress the carrier feedthrough, and minimize and compensate the carrier feedthrough, differences of baseband differential input DC voltages in an in-phase as well as a quadrature-phase are simultaneously adjusted to 0 or a certain slight voltage difference by a simple analog circuit. Therefore, it is possible to suppress carrier feedthrough using a simple analog type apparatus for compensating carrier feedthrough, and simply achieve an apparatus for carrier feedthrough using a variety of quadrature modulators.
摘要翻译：本发明涉及在正交调制系统中补偿载波馈通的装置和方法。为了抑制载波馈通，并且使载波馈通最小化和补偿，同相和正交相中的基带差分输入直流电压的差异通过简单的模拟同时被调整到0或一定的微小电压差电路。因此，可以使用用于补偿载波馈通的简单模拟型装置来抑制载波馈通，并且简单地实现使用各种正交调制器的载波馈通装置。

8. 发明授权

US08369033B2 Method of manufacturing lens and lens manufactured using the same 失效
标题翻译：使用其制造透镜和透镜的方法
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。

9. 发明申请

US20120182836A1 COMMUNICATION SYSTEM USING ULTRASONIC WAVES 审中-公开
标题翻译：使用超声波的通信系统
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。

10. 发明申请

US20120177819A1 Method of manufacturing lens 审中-公开
标题翻译：制造镜片的方法
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。

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