公开(公告)号：US20080139126A1

公开(公告)日：2008-06-12

申请号：US11951522

申请日：2007-12-06

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：US20100150262A1

公开(公告)日：2010-06-17

申请号：US12620739

申请日：2009-11-18

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

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

IPC: H04L25/49

CPC classification number: H04L27/361

Abstract: Provided are a signal amplifying apparatus and method and a wireless transmitter using the same. The signal amplifier includes a polar coordinate converter configured to output an envelope signal and a phase signal by converting a signal to a polar coordinate, a multilevel quantizer configured to output a multilevel quantized signal by quantizing the envelope signal to multiple levels, an amplification state controller configured to control an amplification state using the multilevel quantized signal, and a power amplifier configured to amplify the phase signal according to the controlled amplification state.

Abstract translation: 提供了一种信号放大装置和方法以及使用该放大装置的无线发射机。 信号放大器包括：极坐标转换器，被配置为通过将信号转换为极坐标来输出包络信号和相位信号;多电平量化器，被配置为通过将包络信号量化为多个电平来输出多电平量化信号;放大状态控制器 被配置为使用所述多电平量化信号来控制放大状态，以及功率放大器，被配置为根据所述受控放大状态来放大所述相位信号。