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    • 2. 发明申请
    • HETERODYNE RECEIVER USING ANALOG DISCRETE-TIME SIGNAL PROCESSING AND SIGNAL RECEIVING METHOD THEREOF
    • 使用模拟离散时间信号处理的异步接收机及其信号接收方法
    • US20100093301A1
    • 2010-04-15
    • US12492213
    • 2009-06-26
    • Sung-Jun LEESeong-Min KIMTaek-Jin HWANGKwang-Chun LEE
    • Sung-Jun LEESeong-Min KIMTaek-Jin HWANGKwang-Chun LEE
    • H04B1/26
    • H04B1/28
    • 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.
    • 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。
    • 3. 发明申请
    • RF REPEATER USED FOR TIME DIVISION DUPLEXING AND METHOD THEREOF
    • 用于时分双工的射频复用器及其方法
    • US20080137561A1
    • 2008-06-12
    • US11951480
    • 2007-12-06
    • Seong-Min KIMByung-Su KANGYun-soo KOHeon-Kook KWONKwang-Chun LEE
    • Seong-Min KIMByung-Su KANGYun-soo KOHeon-Kook KWONKwang-Chun LEE
    • H04B7/14
    • H04B7/15535
    • 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.
    • 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。
    • 5. 发明申请
    • PLL APPARATUS FOR OFDM SYSTEM HAVING VARIABLE CHANNEL BANDS AND OPERATING METHOD THEREOF
    • 具有可变通道带的OFDM系统的PLL装置及其操作方法
    • US20080129391A1
    • 2008-06-05
    • US11925073
    • 2007-10-26
    • Yun-Soo KOSeong-Min KIMKwang-Chun LEE
    • Yun-Soo KOSeong-Min KIMKwang-Chun LEE
    • H03L7/085
    • H03L7/107H03L7/18
    • 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.
    • 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。
    • 6. 发明申请
    • APPARATUS AND METHOD FOR DETECTING RADIATED POWER
    • 用于检测放射功率的装置和方法
    • US20110134000A1
    • 2011-06-09
    • US12962308
    • 2010-12-07
    • Seong-Min KIM
    • Seong-Min KIM
    • G01R29/08
    • G01R29/10
    • A radiated power detection apparatus including a reception antenna and a probe in a Fresnel zone determines a measurement parameter of a wireless communication device and coincides central points of an antenna that is included in the wireless communication device, the reception antenna, and the probe. Next, the radiated power detection apparatus measures the magnitude of an electric field corresponding to at least one measurement point while transferring the reception antenna and the probe according to a measurement parameter, calculates the magnitude of a maximum electric field in a far-field using the magnitude of an electric field, and thus detects radiated power of the wireless communication device based on the magnitude of a maximum electric field.
    • 包括菲涅尔区域中的接收天线和探测器的辐射功率检测装置确定无线通信设备的测量参数,并且使包括在无线通信设备,接收天线和探测器中的天线的中心点重合。 接下来,辐射功率检测装置在根据测量参数传送接收天线和探头的同时测量与至少一个测量点相对应的电场的幅度,使用该方法计算远场中的最大电场的大小 电场的大小,从而基于最大电场的大小检测无线通信装置的辐射功率。