公开(公告)号：US20110128079A1

公开(公告)日：2011-06-02

申请号：US12955797

申请日：2010-11-29

Applicant: Taek-Jin HWANG ,  Kwang-Chun LEE

Inventor： Taek-Jin HWANG ,  Kwang-Chun LEE

IPC: H03F3/68 ,  H03F1/22

CPC classification number: H03F3/45179 ,  H03F1/565 ,  H03F3/602 ,  H03F3/72 ,  H03F2200/111 ,  H03F2200/537 ,  H03F2203/7209

Abstract: A multi-band power amplifier in a wireless communication system includes: a plurality of matching circuits connected in parallel to an output stage of the power amplifier and corresponding to a plurality of different operation frequencies, respectively; and a plurality of high-frequency amplifiers connected to the plurality of matching circuits, respectively. The plurality of high-frequency amplifiers are selectively operated depending on the operation frequencies. Each of the high-frequency amplifiers may include a plurality of stages. Each of the matching circuits may include a high-frequency transformer.

Abstract translation: 无线通信系统中的多频带功率放大器包括：与功率放大器的输出级并联连接的多个匹配电路，分别对应于多个不同的工作频率; 以及分别连接到所述多个匹配电路的多个高频放大器。 多个高频放大器根据操作频率选择性地工作。 每个高频放大器可以包括多个级。 每个匹配电路可以包括高频变压器。

公开(公告)号：US20100093301A1

公开(公告)日：2010-04-15

申请号：US12492213

申请日：2009-06-26

Applicant: Sung-Jun LEE ,  Seong-Min KIM ,  Taek-Jin HWANG ,  Kwang-Chun LEE

Inventor： Sung-Jun LEE ,  Seong-Min KIM ,  Taek-Jin HWANG ,  Kwang-Chun LEE

IPC: H04B1/26

CPC classification number: H04B1/28

Abstract: A heterodyne receiver of a wireless communication system using an analog discrete-time signal processing is provided. The heterodyne receiver includes: a radio signal processing unit configured to extract a signal of a desired band from a received radio signal and convert the extracted signal into an intermediate frequency (IF) signal that is an integer multiple of a sample rate specified in a specification of the wireless communication system; a discrete-time signal processing unit configured to charge-sample the IF signal in unit of a predetermined time and perform an anti-aliasing filtering and a successive decimation on the charge-sampled signal, a final output rate according to the decimation being an integer multiple of the specified sample rate; and an analog-to-digital conversion unit configured to convert the successively-decimated analog signal into a digital signal.

Abstract translation: 提供了使用模拟离散时间信号处理的无线通信系统的外差接收机。 外差接收机包括：无线电信号处理单元，被配置为从接收到的无线电信号中提取期望频带的信号，并将提取的信号转换为中间频率（IF）信号，该中频（IF）信号是规范中规定的采样率的整数倍 的无线通信系统; 离散时间信号处理单元，被配置为以预定时间为单位对IF信号进行充电采样，并且对电荷采样信号执行抗混叠滤波和连续抽取，根据抽取的最终输出速率为整数 指定采样率的倍数; 以及模拟 - 数字转换单元，被配置为将连续抽取的模拟信号转换为数字信号。

公开(公告)号：US20080112519A1

公开(公告)日：2008-05-15

申请号：US11876884

申请日：2007-10-23

Applicant: Jae-Ho JUNG ,  Kwang-Chun LEE

Inventor： Jae-Ho JUNG ,  Kwang-Chun LEE

IPC: H04B1/10

CPC classification number: H04B1/30 ,  H04B1/0032 ,  H04B1/0035 ,  H04B1/0039 ,  H04B1/0057 ,  H04B1/1027 ,  H04B1/18

Abstract: Provided are an apparatus for receiving multi-band signals of multiple modes and a method thereof. The apparatus includes a radio frequency (RF) pre-processing unit for receiving and pre-processing a RF input; a low noise amplifier (LNA) coupled to the RF pre-processing unit; an in-phase/quadrature-phase (IQ) frequency down-converter coupled to the LNA; a low pass filter (LPF) coupled to the IQ frequency down-converter; an analog-to-digital converter (ADC) coupled to the LPF; a complex frequency down-convertor for changing a digital local oscillation frequency based on a variation of center frequency of multi-mode baseband IQ signals converted in the ADC and converting multi-mode baseband IQ signals into baseband IQ signals of each mode; a variable digital filter for low-pass filtering the baseband IQ signals of each mode based on digital filter coefficients for filtering through a predetermined bandwidth; and a baseband signal processor for demodulating the baseband IQ signals of each mode.

Abstract translation: 提供了一种用于接收多种模式的多频带信号的装置及其方法。 该装置包括用于接收和预处理RF输入的射频（RF）预处理单元; 耦合到所述RF预处理单元的低噪声放大器（LNA）; 耦合到LNA的同相/正交相位（IQ）频率下变频器; 耦合到IQ频率下变频器的低通滤波器（LPF）; 耦合到所述LPF的模数转换器（ADC）; 用于根据在ADC中转换的多模式基带IQ信号的中心频率的变化来改变数字本地振荡频率并将多模式基带IQ信号转换成每种模式的基带IQ信号的复频率下变频器; 可变数字滤波器，用于基于用于通过预定带宽进行滤波的数字滤波器系数对每种模式的基带IQ信号进行低通滤波; 以及用于解调各模式的基带IQ信号的基带信号处理器。

公开(公告)号：US20120100820A1

公开(公告)日：2012-04-26

申请号：US13344029

申请日：2012-01-05

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

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

IPC: H04B17/00

CPC classification number: H04L1/20

Abstract: 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.

Abstract translation: 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：US20080137561A1

公开(公告)日：2008-06-12

申请号：US11951480

申请日：2007-12-06

Applicant: Seong-Min KIM ,  Byung-Su KANG ,  Yun-soo KO ,  Heon-Kook KWON ,  Kwang-Chun LEE

Inventor： Seong-Min KIM ,  Byung-Su KANG ,  Yun-soo KO ,  Heon-Kook KWON ,  Kwang-Chun LEE

IPC: H04B7/14

CPC classification number: H04B7/15535

Abstract: The present invention relates to an RF repeater used in a time division method, and a method thereof. An RF repeater according to an exemplary embodiment of the present invention receives a downlink signal that is to be transmitted from a base station to a mobile terminal, performs first automatic gain control on the downlink signal, and extracts gain information from the downlink signal on which the first automatic gain control has been performed, on the basis of gain variation information that is the gain information for the downlink signal. Then, the RF repeater performs second automatic gain control on the downlink signal on the basis of the extracted gain information, and performs a control operation such that the downlink signal on which the second automatic gain control has been performed is transmitted to the mobile terminal. According to the exemplary embodiment of the present invention, the RF repeater maintains the received uplink signal at the predetermined level or more by using a pilot signal of a subcarrier that is not allocated during the downlink period, regardless of the number of mobile terminals that are connected to the RF repeater. As a result, the RF repeater can efficiently perform automatic gain control on the uplink signal without performing separate signal analysis or control.

Abstract translation: 本发明涉及用于时分方法的RF中继器及其方法。 根据本发明的示例性实施例的RF中继器接收将从基站发送到移动终端的下行链路信号，对下行链路信号执行第一自动增益控制，并从下行链路信号中提取增益信息， 已经基于作为下行链路信号的增益信息的增益变化信息来执行第一自动增益控制。 然后，RF中继器基于所提取的增益信息对下行链路信号进行第二自动增益控制，并且执行控制操作，使得已经执行了第二自动增益控制的下行链路信号被发送到移动终端。 根据本发明的示例性实施例，RF中继器通过使用在下行链路周期期间未分配的子载波的导频信号将接收到的上行链路信号保持在预定电平或更高级，而不管移动终端的数量如何 连接到RF中继器。 结果，RF中继器可以有效地对上行链路信号执行自动增益控制，而不进行单独的信号分析或控制。

公开(公告)号：US20100128775A1

公开(公告)日：2010-05-27

申请号：US12624934

申请日：2009-11-24

Applicant: Joon-Hyung KIM ,  Jae-Ho JUNG ,  Gweon-Do JO ,  Kwang-Chun LEE

Inventor： Joon-Hyung KIM ,  Jae-Ho JUNG ,  Gweon-Do JO ,  Kwang-Chun LEE

IPC: H03K7/08 ,  H04B1/04

CPC classification number: H04B1/0483 ,  H03F1/0227 ,  H03F3/245 ,  H03F2200/411 ,  H03K7/08

Abstract: Disclosed are an apparatus and method for transmitting a signal in a wireless communication system. The apparatus includes a controller for receiving power control information of a baseband signal, deciding an output mode, and providing an output mode signal, a signal converter for receiving the baseband signal outputting a phase signal, and outputting an envelope signal when the output mode signal indicates a first output mode, a phase modulator for up-converting the phase signal, and an amplifier for combining the envelop signal and the up-converted phase signal for the first output mode and amplifying the combined signal.

Abstract translation: 公开了一种用于在无线通信系统中发送信号的装置和方法。 该装置包括用于接收基带信号的功率控制信息，确定输出模式和提供输出模式信号的控制器，用于接收输出相位信号的基带信号的信号转换器，以及当输出模式信号 表示第一输出模式，用于对相位信号进行上变频的相位调制器，以及用于组合用于第一输出模式的包络信号和上变频相位信号的放大器，并放大组合信号。

公开(公告)号：US20080151763A1

公开(公告)日：2008-06-26

申请号：US11951587

申请日：2007-12-06

Applicant: Sung-Jun LEE ,  Jae-Ho JUNG ,  Hyeong-Geun PARK ,  Seong-Min KIM ,  Kwang-Chun LEE

Inventor： Sung-Jun LEE ,  Jae-Ho JUNG ,  Hyeong-Geun PARK ,  Seong-Min KIM ,  Kwang-Chun LEE

IPC: H04L12/26

CPC classification number: H04L43/50 ,  H04L41/145 ,  H04W24/08

Abstract: Provided is a wired Multiple-Input Multiple-Output (MIMO) link tester. The wired link tester, includes: a simulating unit for constructing a wired link corresponding to a wireless link for a multiple-input multiple-output system and simulating wireless-link characteristics using each variable element located on the wired link; and a control means for prestoring a predetermined value of the variable element depending on the state change time and the number of the state changes and controlling the variable element according to the predetermined value of the variable element.

Abstract translation: 提供了一种有线多输入多输出（MIMO）链路测试仪。 有线链路测试器包括：模拟单元，用于构建对应于多输入多输出系统的无线链路的有线链路，并使用位于有线链路上的每个可变元件来模拟无线链路特性; 以及控制装置，用于根据状态改变时间和状态数量改变预定可变元件的预定值，并根据可变元件的预定值来控制可变元件。

公开(公告)号：US20080129391A1

公开(公告)日：2008-06-05

申请号：US11925073

申请日：2007-10-26

Applicant: Yun-Soo KO ,  Seong-Min KIM ,  Kwang-Chun LEE

Inventor： Yun-Soo KO ,  Seong-Min KIM ,  Kwang-Chun LEE

IPC: H03L7/085

CPC classification number: H03L7/107 ,  H03L7/18

Abstract: Provided are a PLL apparatus for an OFDM system having variable channel band and an operating method thereof. The PLL apparatus includes a frequency divider for dividing an oscillating signal; a phase detector for detecting a phase difference between a reference signal and the divided oscillating signal from the frequency divider and outputting the phase difference signal; a variable loop filter for filtering a phase difference signal outputted from the phase detector; a voltage control oscillator for outputting the oscillator signal to the frequency divider according to the voltage control signal filtered from the variable loop filter; and a variable loop filter controller for varying a filtering band of the variable loop filter according to each of the channel bands.

Abstract translation: 提供一种用于具有可变信道频带的OFDM系统的PLL装置及其操作方法。 PLL装置包括用于分频振荡信号的分频器; 相位检测器，用于检测来自分频器的参考信号和分频振荡信号之间的相位差，并输出相位差信号; 用于对从相位检测器输出的相位差信号进行滤波的可变环路滤波器; 电压控制振荡器，用于根据从可变环路滤波器滤波的电压控制信号将振荡器信号输出到分频器; 以及可变环路滤波器控制器，用于根据每个信道频带改变可变环路滤波器的滤波频带。

公开(公告)号：US20110151775A1

公开(公告)日：2011-06-23

申请号：US12886104

申请日：2010-09-20

Applicant: Byung-Su KANG ,  Heon-Kook KWON ,  Kwang-Chun LEE

Inventor： Byung-Su KANG ,  Heon-Kook KWON ,  Kwang-Chun LEE

IPC: H04B1/60

CPC classification number: H04B7/15535

Abstract: A repeating apparatus in a wireless communication system includes: a signal detection unit configured to receive a signal from a base station or a mobile station and detect strength of the signal; a control unit configured to compare the signal strength detected by the signal detection unit with signal strength predetermined by the system and provide comparison information; and an output signal control unit configured to receive the comparison information from the control unit and adjust and amplify gain of a signal transmitted to the base station or the mobile station.

Abstract translation: 无线通信系统中的中继装置包括：信号检测单元，被配置为从基站或移动站接收信号，并检测信号的强度; 控制单元，被配置为将由信号检测单元检测的信号强度与由系统预定的信号强度进行比较并提供比较信息; 以及输出信号控制单元，被配置为从所述控制单元接收所述比较信息，并且调整和放大发送到所述基站或所述移动站的信号的增益。

公开(公告)号：US20110150139A1

公开(公告)日：2011-06-23

申请号：US12973231

申请日：2010-12-20

Applicant: Sung-Jun LEE ,  Kwang-Chun LEE ,  Hyun-Kyu CHUNG

Inventor： Sung-Jun LEE ,  Kwang-Chun LEE ,  Hyun-Kyu CHUNG

IPC: H04L27/00

CPC classification number: H04B1/7113 ,  H04B17/14

Abstract: The method includes performing a wired back-to-back test by forming M wired paths connecting one of the N transmission antennas with the M reception antennas through M cables, separating ith digital data corresponding to an ith receiver wired path from the plurality of digital data stored in the receiver wherein i is a natural number greater than 1 and smaller than M, extracting a time delay by decimating the separated ith digital data and performing sliding correlation on the decimated data, and extracting attenuation and phase characteristics of the ith receiver wired path by extracting samples after the time delay among the decimated samples.

Abstract translation: 该方法包括：通过M个电缆形成连接N个发送天线中的一个与M个接收天线的M个有线路径进行有线背靠背测试，该多个数字数据与第i个接收机有线路径相对应的数字数据 存储在接收机中，其中i是大于1且小于M的自然数，通过抽取分离的第i个数字数据并对抽取的数据执行滑动相关提取时间延迟，并且提取第i个接收机有线路径的衰减和相位特性 通过在抽取的样本之间的时间延迟之后提取样本。