公开(公告)号：US20110128079A1

公开(公告)日：2011-06-02

申请号：US12955797

申请日：2010-11-29

申请人： Taek-Jin HWANG ,  Kwang-Chun LEE

发明人： Taek-Jin HWANG ,  Kwang-Chun LEE

IPC分类号： H03F3/68 ,  H03F1/22

CPC分类号： H03F3/45179 ,  H03F1/565 ,  H03F3/602 ,  H03F3/72 ,  H03F2200/111 ,  H03F2200/537 ,  H03F2203/7209

摘要： 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.

摘要翻译： 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

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

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

IPC分类号： H04B1/26

CPC分类号： H04B1/28

摘要： 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.

摘要翻译： 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。