公开(公告)号：US20110136445A1

公开(公告)日：2011-06-09

申请号：US12786777

申请日：2010-05-25

Applicant: Donghan LEE ,  Sang Gee KANG ,  Kwang-Soo CHO ,  Man Sik PARK ,  Chan-Won PARK ,  Cheng-Hao QUAN ,  Ji-Hoon BAE ,  Gil Young CHOI ,  Jong-Suk CHAE

Inventor： Donghan LEE ,  Sang Gee KANG ,  Kwang-Soo CHO ,  Man Sik PARK ,  Chan-Won PARK ,  Cheng-Hao QUAN ,  Ji-Hoon BAE ,  Gil Young CHOI ,  Jong-Suk CHAE

IPC: H04B1/40

CPC classification number: H04B1/525 ,  G06K7/0008 ,  G06K7/10346

Abstract: Provided are an RFID reader and a method for suppressing transmission leakage signals thereof. The RFID reader includes a first loop, a second loop, and a digital signal processor. The first loop suppresses a first transmission leakage signal of an RX signal in response to a first leakage control signal. The second loop suppresses a second transmission leakage signal of the RX signal, received through the first loop, in response to a second leakage control signal. The digital signal processor generates the first leakage control signal and the second leakage control signal. The digital signal processor generates the first leakage control signal until the level of the first transmission leakage signal becomes equal to or lower than the level of a first reference transmission leakage signal.

Abstract translation: 提供RFID读取器和用于抑制其传输泄漏信号的方法。 RFID读取器包括第一环路，第二环路和数字信号处理器。 第一回路响应于第一泄漏控制信号来抑制RX信号的第一传输泄漏信号。 响应于第二泄漏控制信号，第二回路抑制通过第一回路接收的RX信号的第二传输泄漏信号。 数字信号处理器产生第一泄漏控制信号和第二泄漏控制信号。 数字信号处理器产生第一泄漏控制信号，直到第一传输泄漏信号的电平变得等于或低于第一参考传输泄漏信号的电平。

公开(公告)号：US06600370B2

公开(公告)日：2003-07-29

申请号：US10119338

申请日：2002-04-08

Applicant: Ung Hee Park ,  Sang Gee Kang ,  Heon Jin Hong

Inventor： Ung Hee Park ,  Sang Gee Kang ,  Heon Jin Hong

IPC: H03F126

CPC classification number: H03F1/26 ,  H03F3/602

Abstract: An intermodulation signal detector is implemented in a non-linear super high frequency circuit for stably detecting an intermodulation signal regardless of the variations of non-linear characteristics of the super high frequency element and an external environment by using combined two transmission lines on which signals have the same amplitude and 180° different phases.

公开(公告)号：US08666323B2

公开(公告)日：2014-03-04

申请号：US12786777

申请日：2010-05-25

Applicant: Donghan Lee ,  Sang Gee Kang ,  Kwang-Soo Cho ,  Man Sik Park ,  Chan-Won Park ,  Cheng-Hao Quan ,  Ji-Hoon Bae ,  Gil Young Choi ,  Jong-Suk Chae

Inventor： Donghan Lee ,  Sang Gee Kang ,  Kwang-Soo Cho ,  Man Sik Park ,  Chan-Won Park ,  Cheng-Hao Quan ,  Ji-Hoon Bae ,  Gil Young Choi ,  Jong-Suk Chae

IPC: H04B17/00

CPC classification number: H04B1/525 ,  G06K7/0008 ,  G06K7/10346

Abstract: Provided are an RFID reader and a method for suppressing transmission leakage signals thereof. The RFID reader includes a first loop, a second loop, and a digital signal processor. The first loop suppresses a first transmission leakage signal of an RX signal in response to a first leakage control signal. The second loop suppresses a second transmission leakage signal of the RX signal, received through the first loop, in response to a second leakage control signal. The digital signal processor generates the first leakage control signal and the second leakage control signal. The digital signal processor generates the first leakage control signal until the level of the first transmission leakage signal becomes equal to or lower than the level of a first reference transmission leakage signal.

Abstract translation: 提供RFID读取器和用于抑制其传输泄漏信号的方法。 RFID读取器包括第一环路，第二环路和数字信号处理器。 第一回路响应于第一泄漏控制信号来抑制RX信号的第一传输泄漏信号。 响应于第二泄漏控制信号，第二回路抑制通过第一回路接收的RX信号的第二传输泄漏信号。 数字信号处理器产生第一泄漏控制信号和第二泄漏控制信号。 数字信号处理器产生第一泄漏控制信号，直到第一传输泄漏信号的电平变得等于或低于第一参考传输泄漏信号的电平。

公开(公告)号：US20120114029A1

公开(公告)日：2012-05-10

申请号：US13290556

申请日：2011-11-07

Applicant: Joon-gyu RYU ,  Deock-Gil OH ,  Sang-Gee KANG

Inventor： Joon-gyu RYU ,  Deock-Gil OH ,  Sang-Gee KANG

IPC: H04B17/00

CPC classification number: H04B1/0483 ,  H03F1/0222 ,  H03F3/24 ,  H03F2200/102

Abstract: Provided are a method and apparatus for measuring a time delay in an envelope elimination and restoration (EER) transmitter. A method of measuring a time delay in an EER transmitter includes receiving a modulated sinusoidal signal and distributing the modulated sinusoidal signal to be transmitted through transmission lines separated from each other, extracting an amplitude modulation signal and a phase modulation signal from the modulated sinusoidal signal, and detecting envelops of the amplitude and phase modulation signals and determining a difference in time between the amplitude and phase modulation signals. In the EER transmitter, to measure a time delay between input and output signals, time delays of paths of amplitude and phase modulation signals of the input signal are compared, thereby determining a difference in time between the amplitude and phase modulation signals.

Abstract translation: 提供了一种用于测量包络消除和恢复（EER）发射机中的时间延迟的方法和装置。 一种测量EER发射机中的时间延迟的方法包括：接收调制正弦信号并分配要通过彼此分离的传输线传输的调制正弦信号，从调制正弦信号中提取幅度调制信号和相位调制信号， 以及检测振幅和相位调制信号的包络并确定幅度和相位调制信号之间的时间差。 在EER发射机中，为了测量输入和输出信号之间的时间延迟，比较输入信号幅度和相位调制信号路径的时间延迟，从而确定幅度和相位调制信号之间的时间差。

公开(公告)号：US08446936B2

公开(公告)日：2013-05-21

申请号：US12733691

申请日：2009-04-17

Applicant: Yong-Soek Kim ,  Sang-Gee Kang ,  Young-Woo Suh

Inventor： Yong-Soek Kim ,  Sang-Gee Kang ,  Young-Woo Suh

IPC: H04B1/38

CPC classification number: H04B7/15585

Abstract: Disclosed is a co-channel feedback signal cancelling regenerative repeater of the Advanced Television Systems Committee (ATSC) that extracts a predetermined reference value of feedback signal to be able to cancel the feedback signal among received signals, including: a signal receiving unit; a signal demodulating unit that converts frequency of a received signal and demodulates it into a baseband signal; an interference equalizing unit that corrects characteristics of the demodulated signal and cancels feedback signal; a channel equalizing unit that compensates for channel distortion of an original signal from which the feedback signal is cancelled; a modulating unit that modulates the channel distortion-compensated original signal and converts it into an analog signal; and a signal transmitting unit that converts the frequency of the modulated signal, controls and amplifies its gain, and transmits a regenerative transmission signal.

Abstract translation: 公开了高级电视系统委员会（ATSC）的同信道反馈信号取消再生中继器，其提取反馈信号的预定参考值以能够消除接收信号中的反馈信号，包括：信号接收单元; 信号解调单元，其对接收信号的频率进行转换并将其解调为基带信号; 干扰均衡单元，其校正解调信号的特性并消除反馈信号; 信道均衡单元，其补偿反馈信号被消除的原始信号的信道失真; 调制单元，调制通道失真补偿原始信号并将其转换为模拟信号; 以及信号发送单元，其转换调制信号的频率，控制并放大其增益，并发送再生发送信号。

公开(公告)号：US20100194987A1

公开(公告)日：2010-08-05

申请号：US12733691

申请日：2009-04-17

Applicant: Yong-Soek Kim ,  Sang-Gee Kang ,  Young-Woo Suh

Inventor： Yong-Soek Kim ,  Sang-Gee Kang ,  Young-Woo Suh

IPC: H04N5/14

CPC classification number: H04B7/15585

Abstract: Disclosed is a co-channel feedback signal cancelling regenerative repeater of the Advanced Television Systems Committee (ATSC) that extracts a predetermined reference value of feedback signal to be able to cancel the feedback signal among received signals, including: a signal receiving unit; a signal demodulating unit that converts frequency of a received signal and demodulates it into a baseband signal; an interference equalizing unit that corrects characteristics of the demodulated signal and cancels feedback signal; a channel equalizing unit that compensates for channel distortion of an original signal from which the feedback signal is cancelled; a modulating unit that modulates the channel distortion-compensated original signal and converts it into an analog signal; and a signal transmitting unit that converts the frequency of the modulated signal, controls and amplifies its gain, and transmits a regenerative transmission signal, wherein the signal demodulating unit is configured to include a coupling that hands over the regenerative transmission signal of the signal transmitting unit separately from a system linked with the signal receiving unit, thereby making it possible to convert and demodulate the frequency of the regenerative transmission signal, and the interference equalizing unit is configured to estimate a reference value of feedback signal from the demodulated regenerative transmission signal, thereby making it possible to remove the feedback signal among the received signals. The channel equalizing unit corrects the distortion of the original signal due to a multipath and extracts the regenerative signal, thereby improving the quality of broadcasting repeating such as an image improvement of the repeated signal.

Abstract translation: 公开了高级电视系统委员会（ATSC）的同信道反馈信号取消再生中继器，其提取反馈信号的预定参考值以能够消除接收信号中的反馈信号，包括：信号接收单元; 信号解调单元，其将接收信号的频率转换并将其解调为基带信号; 干扰均衡单元，其校正解调信号的特性并消除反馈信号; 信道均衡单元，其补偿反馈信号被消除的原始信号的信道失真; 调制单元，调制通道失真补偿原始信号并将其转换为模拟信号; 以及信号发送单元，其转换调制信号的频率，控制并放大其增益，并发送再生发送信号，其中信号解调单元被配置为包括耦合信号发送单元的再生发送信号 从与信号接收单元连接的系统分离，从而可以对再生发送信号的频率进行转换和解调，并且干扰均衡单元被配置为从解调的再生发送信号估计反馈信号的参考值，从而 使得可以在接收的信号中去除反馈信号。

信道均衡单元通过多路径校正原始信号的失真，并提取再生信号，从而提高广播重复的质量，例如重复信号的图像改善 。

公开(公告)号：US06232837B1

公开(公告)日：2001-05-15

申请号：US09417651

申请日：1999-10-14

Applicant: Ki Suk Yoo ,  Sang Gee Kang ,  Jae Ick Choi ,  Jong Suk Chae

Inventor： Ki Suk Yoo ,  Sang Gee Kang ,  Jae Ick Choi ,  Jong Suk Chae

IPC: H03F126

CPC classification number: H03F1/3229

Abstract: Provided with an optimal control method for an adaptive feedforward linear amplifier that includes an adaptive controller connected to first and second PLLs (Phase Locked Loops) respectively determining frequency bands for a main signal component and a distortion signal component. The adaptive controller adaptively controls control voltages of a first variable phase shifter and a first variable attenuator constituting a main signal cancellation loop and control voltages of a second variable phase shifter and a second variable attenuator constituting an error signal cancellation loop. The optimal control method includes the steps of: (a) after initialization of necessary parameters, reading a strength of an input signal, determining the initial optimal control voltages of the first and second variable phase shifters and the first and second variable attenuators, outputting the corresponding control voltages, and setting the first PLL to read a main signal strength of the main signal cancellation loop; (b) controlling the optimal control voltages of the first variable phase shifter and the first variable attenuator until the main signal strength becomes lower than a first threshold, if the main signal strength exceeds the first threshold; (c) determining the main signal strength read out from the error signal cancellation loop, if the main signal strength is greater than the first threshold, repeat step (b), otherwise; and (d) controlling the optimal control voltages for the second variable phase shifter and the second variable attenuator until the difference between the main signal strength and the distortion signal strength becomes lower than a second threshold, if the difference is greater than the second threshold.

Abstract translation: 提供了一种用于自适应前馈线性放大器的最佳控制方法，该自适应前馈线性放大器包括连接到分别确定主信号分量和失真信号分量的频带的第一和第二PLL（锁相环）的自适应控制器。 自适应控制器自适应地控制构成主信号消除环路的第一可变移相器和第一可变衰减器的控制电压以及构成误差信号消除环路的第二可变移相器和第二可变衰减器的控制电压。 最优控制方法包括以下步骤：（a）在必要参数初始化之后，读取输入信号的强度，确定第一和第二可变移相器以及第一和第二可变衰减器的初始最佳控制电压，输出 相应的控制电压，并设置第一PLL以读取主信号消除环路的主信号强度; （b）如果主信号强度超过第一阈值，则控制第一可变移相器和第一可变衰减器的最佳控制电压，直到主信号强度变得低于第一阈值为止; （c）确定从误差信号消除回路读出的主信号强度，如果主信号强度大于第一阈值，则重复步骤（b），否则; 以及（d）如果差值大于第二阈值，则控制第二可变移相器和第二可变衰减器的最佳控制电压，直到主信号强度和失真信号强度之间的差变得低于第二阈值。