公开(公告)号：US12051999B2

公开(公告)日：2024-07-30

申请号：US18308112

申请日：2023-04-27

Applicant: Skyworks Solutions, Inc.

Inventor： Serge Francois Drogi ,  Florinel G. Balteanu ,  Shayan Farahvash

IPC: H03F1/30 ,  G06F30/367 ,  H03F1/02 ,  H03F3/195 ,  H03F3/24 ,  G06F119/06 ,  G06F119/10

CPC classification number: H03F1/304 ,  G06F30/367 ,  H03F1/0227 ,  H03F3/195 ,  H03F3/245 ,  G06F2119/06 ,  G06F2119/10 ,  H03F2200/102 ,  H03F2200/504 ,  H03F2201/3227

Abstract: Envelope tracking systems with modeling for power amplifier supply voltage filtering are provided herein. In certain embodiments, an envelope tracking system includes a supply voltage filter, a power amplifier that receives a power amplifier supply voltage through the supply voltage filter, and an envelope tracker that generates the power amplifier supply voltage. The power amplifier provides amplification to a radio frequency (RF) signal that is generated based on digital signal data, and the envelope tracker generates the power amplifier supply voltage based on an envelope signal corresponding to an envelope of the RF signal. The envelope tracking system further includes digital modeling circuitry that models the supply voltage filter and operates to digitally compensate the digital signal data for effects of the supply voltage filter, such as distortion.

公开(公告)号：US20180309465A1

公开(公告)日：2018-10-25

申请号：US16024303

申请日：2018-06-29

Applicant: Analog Devices Global

Inventor： Patrick Pratt

IPC: H04B1/04 ,  H03F1/32 ,  H03F3/195

CPC classification number: H04B1/0475 ,  H03F1/3247 ,  H03F1/3294 ,  H03F3/195 ,  H03F2200/451 ,  H03F2201/3227 ,  H03F2201/3233 ,  H04B2001/0425

Abstract: Various examples are directed to systems and methods for digital predistortion (DPD). A linear digital predistortion (DPD) circuit may be programmed to generate a pre-distorted signal linear component based at least in part on a complex baseband signal. A nonlinear DPD circuit may be programmed to generate a pre-distorted signal nonlinear component based at least in part on the complex baseband signal. A mixer circuit programmed to generate a pre-distorted signal based at least in part on the pre-distorted signal linear component and the pre-distorted signal nonlinear component.

公开(公告)号：US20170040954A1

公开(公告)日：2017-02-09

申请号：US15332682

申请日：2016-10-24

Applicant: Ali Mohamed Darwish

Inventor： Ali Mohamed Darwish

IPC: H03F1/32 ,  H03G1/00

CPC classification number: H03F1/3247 ,  H03F1/3282 ,  H03F1/3288 ,  H03F1/56 ,  H03F3/193 ,  H03F3/245 ,  H03F2200/192 ,  H03F2200/204 ,  H03F2200/222 ,  H03F2200/318 ,  H03F2200/387 ,  H03F2200/411 ,  H03F2201/3212 ,  H03F2201/3227 ,  H03F2201/3231 ,  H03F2201/3233 ,  H03G1/0029 ,  H03G1/0035 ,  H03G1/007 ,  H03G3/3036

Abstract: The present disclosure describes a method and system for linearizing an amplifier using transistor-level dynamic feedback. The method and system enables nonlinear amplifiers to exhibit linear performance using one or more of gain control elements and phase shifters in the feedback path. The disclosed method and system may also allow an amplifier to act as a pre-distorter or a frequency/gain programmable amplifier.

Abstract translation: 本公开描述了一种用于使用晶体管级动态反馈线性化放大器的方法和系统。 该方法和系统使得非线性放大器能够使用反馈路径中的一个或多个增益控制元件和移相器来呈现线性性能。 所公开的方法和系统还可以允许放大器充当预失真器或频率/增益可编程放大器。

公开(公告)号：US20160336906A1

公开(公告)日：2016-11-17

申请号：US15154776

申请日：2016-05-13

Applicant: Crocus Technology Inc.

Inventor： Douglas J. Lee ,  Yaron Oren-Pines ,  Seyed A. Tabatabaei

IPC: H03F1/32 ,  G11C11/16 ,  H01L43/08 ,  H04B1/04 ,  H03F1/02 ,  H03F15/00

CPC classification number: H03F1/3247 ,  G11C11/16 ,  G11C11/161 ,  G11C11/1673 ,  G11C11/1675 ,  H03F1/02 ,  H03F1/0233 ,  H03F3/195 ,  H03F3/24 ,  H03F15/00 ,  H03F2200/102 ,  H03F2201/3227 ,  H04B1/04 ,  H04B2001/0425 ,  H04B2001/0433 ,  H04B2001/045

Abstract: A circuit has a magnetic device to produce a pre-distorted signal from a sinusoidal input signal. The magnetic device has physical attributes selected to produce characteristics of the pre-distorted signal. A power amplifier is coupled to the magnetic device. The power amplifier processes the pre-distorted signal to produce an output signal with reduced nonlinear behavior associated with the power amplifier.

Abstract translation: 电路具有磁性装置，以从正弦输入信号产生预失真信号。 磁性装置具有选择的物理属性以产生预失真信号的特性。 功率放大器耦合到磁性装置。 功率放大器处理预失真信号以产生具有与功率放大器相关联的降低的非线性行为的输出信号。

公开(公告)号：US20160329927A1

公开(公告)日：2016-11-10

申请号：US15108108

申请日：2014-12-24

Applicant: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD

Inventor： Jun Xiong ,  Xinmin Wang ,  Tao Duan ,  Jingyi Wang

IPC: H04B1/62 ,  H03F3/24 ,  H03F1/32 ,  H04B1/04

CPC classification number: H04B1/62 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/3258 ,  H03F3/24 ,  H03F3/245 ,  H03F2200/198 ,  H03F2201/3209 ,  H03F2201/3224 ,  H03F2201/3227 ,  H03F2201/3233 ,  H04B1/04 ,  H04B1/0475 ,  H04B2001/0416 ,  H04B2001/0425 ,  H04L25/49 ,  H04L27/367 ,  H04L27/368

Abstract: The present application relates to the field of digital pre-distortion processing. Disclosed in an embodiment of the present application are a pre-distortion parameter obtaining method and pre-distortion system for simplifying calculating complexity of a model while achieving good signal processing effect. The method comprises: after the beginning of periodic filtering processing, obtaining a pre-distorted signal after pre-distortion processing and a first feedback signal after power amplification (S101); obtaining a second feedback signal by eliminating the rated linear gain of the first feedback signal (S102); determining a pre-distortion parameter according to a matrix formed by the second feedback signal and a matrix formed by the pre-distorted signal (S103); updating the pre-distortion parameter index table according to the determined pre-distortion parameter (104).

Abstract translation: 本申请涉及数字预失真处理领域。 在本申请的实施例中公开了一种用于在实现良好的信号处理效果的同时简化模型的计算复杂度的预失真参数获取方法和预失真系统。 该方法包括：在周期性滤波处理开始之后，在预失真处理之后获得预失真信号和功率放大后的第一反馈信号（S101）; 通过消除第一反馈信号的额定线性增益来获得第二反馈信号（S102）; 根据由所述第二反馈信号形成的矩阵和由所述预失真信号形成的矩阵来确定预失真参数（S103）; 根据确定的预失真参数（104）更新预失真参数索引表。

公开(公告)号：US09438177B2

公开(公告)日：2016-09-06

申请号：US14320552

申请日：2014-06-30

Applicant: Realtek Semiconductor Corp.

Inventor： Yuan-Shuo Chang

IPC: H03F1/26 ,  H03F1/32 ,  H03F3/195 ,  H03F3/24

CPC classification number: H03F1/3258 ,  H03F1/26 ,  H03F1/3241 ,  H03F1/3247 ,  H03F3/195 ,  H03F3/24 ,  H03F2201/3212 ,  H03F2201/3224 ,  H03F2201/3227 ,  H03F2201/3233

Abstract: A pre-distortion method includes: receiving an input data; and obtaining a pre-distorted output by inputting the input data into a pre-distortion function, wherein the pre-distortion function is determined according to a power amplifier. A pre-distortion apparatus includes a receiver and a pre-distortion unit. The receiver is utilized for receiving an input data. The pre-distortion unit is utilized for obtaining a pre-distorted output by inputting the input data into a pre-distortion function, wherein the pre-distortion function is determined according to a following power amplifier. A non-transitory machine readable medium stores a program code executed for performing steps of the proposed pre-distortion method.

Abstract translation: 预失真方法包括：接收输入数据; 以及通过将输入数据输入到预失真功能中来获得预失真输出，其中根据功率放大器来确定预失真功能。 预失真装置包括接收机和预失真单元。 接收机用于接收输入数据。 预失真单元用于通过将输入数据输入到预失真功能中来获得预失真输出，其中根据随后的功率放大器来确定预失真功能。 非暂时机器可读介质存储执行用于执行所提出的预失真方法的步骤的程序代码。

公开(公告)号：US09337783B2

公开(公告)日：2016-05-10

申请号：US14552120

申请日：2014-11-24

Applicant: FUJITSU LIMITED

Inventor： Satoshi Matsubara ,  Mitsuharu Hamano ,  Hideharu Shako

IPC: H03F1/26 ,  H03F1/32 ,  H04B1/04 ,  H03F3/24 ,  H03F3/21 ,  H03F3/189

CPC classification number: H03F1/3247 ,  H03F1/3241 ,  H03F3/189 ,  H03F3/21 ,  H03F3/245 ,  H03F2200/336 ,  H03F2200/465 ,  H03F2201/3215 ,  H03F2201/3227 ,  H03F2201/3233 ,  H04B1/0475 ,  H04B2001/0425

Abstract: A distortion compensation apparatus includes: a storage unit that stores a distortion compensation coefficient; a distortion-compensation-coefficient selecting unit that takes a logarithm of power of an input signal and exponentiates a value obtained by taking the logarithm, and that selects a distortion compensation coefficient that is stored in the storage unit according to a value obtained by the exponentiating; a distortion-compensation processing unit that acquires the selected distortion compensation coefficient from the storage unit, and that performs distortion compensation processing on the input signal to the distortion-compensation-coefficient selecting unit using the acquired distortion compensation coefficient; an amplifier that amplifies the signal subjected to the distortion compensation processing; and a distortion-compensation-coefficient updating unit that updates the distortion compensation coefficient stored in the storage unit based on the amplified signal and the input signal to the distortion-compensation-coefficient selecting unit.

Abstract translation: 失真补偿装置包括：存储单元，存储失真补偿系数; 失真补偿系数选择单元，其采用输入信号的幂的对数，并且通过取对数获得的值，并且根据通过取幂获得的值选择存储在存储单元中的失真补偿系数 ; 失真补偿处理单元，其从所述存储单元获取所选择的失真补偿系数，并且使用所获取的失真补偿系数对所述失真补偿系数选择单元对所述输入信号进行失真补偿处理; 放大器，其对经过失真补偿处理的信号进行放大; 以及失真补偿系数更新单元，其将存储在存储单元中的失真补偿系数基于放大信号和输入信号更新到失真补偿系数选择单元。

公开(公告)号：US09209753B2

公开(公告)日：2015-12-08

申请号：US14552056

申请日：2014-11-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yuxiang Xiao ,  Erni Zhu ,  Anding Zhu

IPC: H04K1/02 ,  H04L25/03 ,  H04L25/49 ,  H03F1/32 ,  H03F3/19 ,  H03F3/24 ,  H04B1/04

CPC classification number: H03F1/3247 ,  H03F1/3241 ,  H03F1/3252 ,  H03F1/3258 ,  H03F3/19 ,  H03F3/24 ,  H03F3/245 ,  H03F2200/36 ,  H03F2200/39 ,  H03F2200/451 ,  H03F2201/3209 ,  H03F2201/3215 ,  H03F2201/3224 ,  H03F2201/3227 ,  H04B1/0475 ,  H04B2001/0408 ,  H04B2001/0425 ,  H04L27/368

Abstract: A predistortion correction method, a predistortion correction apparatus, a transmitter, and a base station are provided. The method includes: performing, based on a digital predistortion model, non-linear processing on an input transmit signal to obtain higher-order distortion time-domain signals; and obtaining, after performing processing on the higher-order distortion time-domain signals, a predistortion signal to be input to a power amplifier, where a process of converting the higher-order distortion time-domain signals to the predistortion signal includes bandwidth limitation processing, so that the predistortion signal to be input to the power amplifier is a predistortion signal within a preset bandwidth. Embodiments of the present invention can ensure predistortion accuracy, and can also reduce a requirement for a bandwidth and a sampling rate of a feedback channel, thereby reducing a predistortion cost.

Abstract translation: 提供了预失真校正方法，预失真校正装置，发射机和基站。 该方法包括：基于数字预失真模型对输入发射信号进行非线性处理，以获得更高阶失真时域信号; 在对高阶失真时域信号执行处理之后，获得要输入到功率放大器的预失真信号，其中将高阶失真时域信号转换为预失真信号的处理包括带宽限制处理 ，使得要输入到功率放大器的预失真信号是预设带宽内的预失真信号。 本发明的实施例可以确保预失真精度，并且还可以减少对反馈信道的带宽和采样率的要求，从而降低预失真成本。

公开(公告)号：US20150280795A1

公开(公告)日：2015-10-01

申请号：US14740851

申请日：2015-06-16

Applicant: Nujira Limited

Inventor： Gerard Wimpenny

IPC: H04B7/04 ,  H03F3/21 ,  H04B1/04 ,  H03F1/02 ,  H03F1/32 ,  H03F3/19 ,  H03F3/24

CPC classification number: H04B7/0417 ,  H03F1/02 ,  H03F1/0222 ,  H03F1/3247 ,  H03F3/19 ,  H03F3/211 ,  H03F3/24 ,  H03F3/245 ,  H03F3/602 ,  H03F3/68 ,  H03F2200/102 ,  H03F2200/321 ,  H03F2200/451 ,  H03F2200/504 ,  H03F2201/3215 ,  H03F2201/3227 ,  H03F2203/21106 ,  H03F2203/21181 ,  H04B1/0475 ,  H04B7/0413 ,  H04B7/06 ,  H04B2001/0425 ,  H04L27/367 ,  H04W52/52

Abstract: There is disclosed an amplifier arrangement comprising a plurality of amplifiers each arranged to amplify one of a plurality of different input signals, the arrangement comprising an envelope tracking modulator for generating a common power supply voltage for the power amplifiers, and further comprising an envelope selector adapted to receive a plurality of signals representing the envelopes of the plurality of input signals, and adapted to generate an output envelope signal representing the one of the plurality of envelopes having the highest level at a particular time instant as the input signal for the envelope tracking modulator.

Abstract translation: 公开了一种放大器装置，其包括多个放大器，每个放大器被布置成放大多个不同的输入信号中的一个，该装置包括用于产生功率放大器的公共电源电压的包络跟踪调制器，并且还包括适配 以接收表示多个输入信号的包络的多个信号，并且适于产生表示在特定时刻具有最高电平的多个包络中的一个的输出包络信号，作为包络跟踪调制器的输入信号 。

公开(公告)号：US20150188499A1

公开(公告)日：2015-07-02

申请号：US14165777

申请日：2014-01-28

Applicant: MediaTek Inc.

Inventor： Tsung-Han TSAI ,  Shin-Fu CHEN

IPC: H03F1/32 ,  H04B1/04 ,  H03F3/24

CPC classification number: H03F1/3247 ,  H03F1/3241 ,  H03F3/195 ,  H03F3/24 ,  H03F2200/465 ,  H03F2201/3227 ,  H04B1/0475 ,  H04B2001/0425

Abstract: A communication system is provided. The communication system includes an antenna, a power amplifier, a detector and a signal-processing module. The power amplifier provides an output signal to the antenna according to an input signal. The detector provides power information and voltage information according to the output signal. The signal-processing module obtains a loading variation according to the power information and the voltage information, and provides the input signal according to the loading variation. When the loading variation exceeds a threshold value, the signal-processing module performs a digital pre-distortion calibration for the input signal.

Abstract translation: 提供通信系统。 通信系统包括天线，功率放大器，检测器和信号处理模块。 功率放大器根据输入信号向天线提供输出信号。 检测器根据输出信号提供电源信息和电压信息。 信号处理模块根据功率信息和电压信息获得负载变化，并根据负载变化提供输入信号。 当负载变化超过阈值时，信号处理模块对输入信号进行数字预失真校准。