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    DIGITAL PRE-DISTORTION SYSTEMS IN TRANSMITTERS
    3.
    发明申请
    DIGITAL PRE-DISTORTION SYSTEMS IN TRANSMITTERS 有权
    发射机中的数字预失真系统

    公开(公告)号：US20150016567A1

    公开(公告)日：2015-01-15

    申请号：US13940263

    申请日：2013-07-12

    Applicant: ANALOG DEVICES TECHNOLOGY

    Inventor： Dong Chen

    IPC: H04B1/04

    CPC classification number: H04B1/0475 ,  H03F1/3247 ,  H03F1/3258 ,  H03F1/3282 ,  H03F3/195 ,  H03F3/245 ,  H03F2200/111 ,  H03F2201/3206 ,  H03F2201/3209 ,  H03F2201/3212 ,  H03F2201/3224 ,  H03F2201/3233 ,  H04B2001/0425

    Abstract: Various digital pre-distortion systems for use in transmitters are disclosed. The digital pre-distortion system comprises an observing path, which performs either undersampling or radio frequency sampling of the output of a power amplifier. Undersampling may be performed at a rate, which causes aliasing to occur in the undersampled frequency domain. Both undersampling and radio frequency sampling reduces the complexity of the digital pre-distortion system by removing any down mixing modules or anti-aliasing modules, while maintaining reasonable performance of the digital pre-distortion systems.

    Abstract translation: 公开了用于发射机的各种数字预失真系统。 数字预失真系统包括观测路径，其执行功率放大器的输出的欠采样或射频采样。 可以以使得在欠采样频域中出现混叠的速率来执行不抽样。 欠采样和射频采样都可以通过去除任何下混频模块或抗混叠模块来降低数字预失真系统的复杂性，同时保持数字预失真系统的合理性能。

    RF power transmission, modulation, and amplification embodiments, including control circuitry for controlling power amplifier output stages
    6.
    发明授权
    RF power transmission, modulation, and amplification embodiments, including control circuitry for controlling power amplifier output stages 有权
    RF功率传输，调制和放大实施例，包括用于控制功率放大器输出级的控制电路

    公开(公告)号：US08233858B2

    公开(公告)日：2012-07-31

    申请号：US11636970

    申请日：2006-12-12

    Applicant: David F. Sorrells ,  Gregory S. Rawlins ,  Michael W. Rawlins

    Inventor： David F. Sorrells ,  Gregory S. Rawlins ,  Michael W. Rawlins

    IPC: H04B1/04

    CPC classification number: H03F1/02 ,  H03F1/0205 ,  H03F1/0211 ,  H03F1/0261 ,  H03F1/0294 ,  H03F1/32 ,  H03F3/211 ,  H03F3/24 ,  H03F3/38 ,  H03F2200/102 ,  H03F2201/3206 ,  H03G3/3042 ,  H04B1/04

    Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.

    Abstract translation: 本文公开了用于矢量组合功率放大的方法和系统。 在一个实施例中，多个信号被单独放大，然后相加以形成期望的时变复包络信号。 控制一个或多个信号的相位和/或频率特性以提供期望的时变复包络信号的期望的相位，频率和/或幅度特性。 在另一个实施例中，时变复包络信号被分解为多个恒定包络分量信号。 构成信号被均等地或基本相等地放大，然后相加以构建原始时变包络信号的放大版本。 实施例还执行上变频。

    Wireless Communication Apparatus
    7.
    发明申请
    Wireless Communication Apparatus 审中-公开
    无线通信设备

    公开(公告)号：US20100148745A1

    公开(公告)日：2010-06-17

    申请号：US12528772

    申请日：2008-02-26

    Applicant: Hideto Kanou

    Inventor： Hideto Kanou

    IPC: G05F3/00 ,  H03G3/20

    CPC classification number: H03F1/0266 ,  H03F1/02 ,  H03F3/189 ,  H03F3/24 ,  H03F2201/3206 ,  H04B2001/045

    Abstract: In a wireless communication apparatus of the present invention for transmitting a modulated signal using multi-carriers, a bias voltage of a power amplifier (101) for amplifying the modulated signal is controlled by control units (10, 102) according to the number of carriers in the modulated signal so as to reduce power consumption.

    Abstract translation: 在本发明的用于使用多载波发送调制信号的无线通信装置中，用于放大调制信号的功率放大器（101）的偏置电压由控制单元（10,102）根据载波数量 在调制信号中降低功耗。

    Adaptive feedback channel for radio frequency power amplifiers
    8.
    发明授权
    Adaptive feedback channel for radio frequency power amplifiers 有权
    射频功率放大器的自适应反馈信道

    公开(公告)号：US07103329B1

    公开(公告)日：2006-09-05

    申请号：US10056967

    申请日：2001-10-25

    Applicant: Robert J. Thon

    Inventor： Robert J. Thon

    IPC: H01Q11/12

    CPC classification number: H03F1/32 ,  H03C5/00 ,  H03F1/02 ,  H03F1/0205 ,  H03F1/3247 ,  H03F1/3282 ,  H03F3/19 ,  H03F3/24 ,  H03F2200/132 ,  H03F2200/198 ,  H03F2200/204 ,  H03F2200/207 ,  H03F2200/372 ,  H03F2201/3206

    Abstract: A radio frequency (RF) amplifier system includes an RF power amplifier having an input and an output, and a typical gain of 1000 or more between the input and the output. An adaptive feedback channel is coupled between the input and the output of the RF power amplifier. The adaptive feedback channel receives as inputs audio signals for modulation of the input of the RF power amplifier, a frequency command word indicative of a desired frequency and phase of the RF amplifier system, and a control word indicative of a desired power level of the output of the RF power amplifier and of a mode of operation of the RF amplifier system. In response to the inputs, the adaptive feedback channel provides as an output a degenerative feedback signal to the input of the RF power amplifier.

    Abstract translation: 射频（RF）放大器系统包括具有输入和输出的RF功率放大器，以及输入和输出之间的1000或更大的典型增益。 自适应反馈信道耦合在RF功率放大器的输入和输出之间。 自适应反馈信道作为输入接收用于调制RF功率放大器的输入的音频信号，表示RF放大器系统的期望频率和相位的频率指令字，以及表示输出的期望功率电平的控制字 的RF功率放大器和RF放大器系统的操作模式。 响应于输入，自适应反馈信道作为输出提供到RF功率放大器的输入的退化反馈信号。

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