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    WIRELESS DEVICE
    32.
    发明申请
    WIRELESS DEVICE 有权

    公开(公告)号：US20170093346A1

    公开(公告)日：2017-03-30

    申请号：US15251871

    申请日：2016-08-30

    Applicant: FUJITSU LIMITED

    Inventor： Satoshi Matsubara ,  HIDEHARU SHAKO

    IPC: H03F1/32 ,  H03F3/24

    CPC classification number: H03F1/32 ,  H03F1/3247 ,  H03F3/19 ,  H03F3/245 ,  H03F2201/3231 ,  H03F2201/3233 ,  H04W88/02

    Abstract: an amplifier amplifies electrical power of signals. A calculating unit calculates a cumulative value for each of first samples and second samples, between which a difference in electrical power or phase is within a first range, in a first sample group and a second sample group corresponding to a first signal that is a signal before amplification in the amplifier and a second signal that is a signal after amplification in the amplifier. Then, the calculating unit calculates, by using the calculated cumulative value, a phase difference between the first signal and the second signal. The correction unit corrects the phase difference by using a correction amount calculated from the phase difference. The updating unit updates, by using the first signal and the second signal of which the phase difference is corrected, a distortion compensation coefficient that is used to compensate nonlinear distortion generated in the amplifier.

    SYSTEMS AND METHODS FOR SIGNAL PREDISTORTION
    33.
    发明申请
    SYSTEMS AND METHODS FOR SIGNAL PREDISTORTION 有权
    用于信号预测的系统和方法

    公开(公告)号：US20170070196A1

    公开(公告)日：2017-03-09

    申请号：US14849527

    申请日：2015-09-09

    Applicant: Hughes Network Systems, LLC

    Inventor： BASSEL F. BEIDAS

    IPC: H03F1/32 ,  H04B1/04 ,  H03F3/21

    CPC classification number: H03F1/3241 ,  H03F1/3258 ,  H03F3/211 ,  H03F3/24 ,  H03F2201/3203 ,  H03F2201/3231 ,  H03F2201/3233 ,  H04B1/0475 ,  H04B2001/0408 ,  H04L27/368

    Abstract: A single or multistage signal predistorter includes an input coupled to receive an information signal comprising input samples and an output coupled to the high power amplifier, the signal predistorter configured to receive an input sample, generate a distortion sample based on an estimate of nonlinearity of the high power amplifier at an operating saturation level, modify the input sample with a correction term to generate a predistortion signal, wherein the correction term is proportional to the distortion sample, and further wherein the predistortion signal comprises the information signal modified to account for nonlinearities in the high power amplifier.

    Abstract translation: 单级或多级信号预失真器包括耦合以接收包括输入样本和耦合到高功率放大器的输出的信息信号的输入，该信号预失真器被配置为接收输入样本，基于所估计的非线性估计来产生失真样本 在功率饱和电平下的高功率放大器，用校正项修改输入采样以产生预失真信号，其中所述校正项与所述失真采样成比例，并且其中所述预失真信号包括被修改以消除非线性的信息信号 大功率放大器。

    Doherty power amplifier with integrated pre-distortion
    34.
    发明授权
    Doherty power amplifier with integrated pre-distortion 有权
    Doherty功率放大器具有集成的预失真

    公开(公告)号：US09461596B1

    公开(公告)日：2016-10-04

    申请号：US14292241

    申请日：2014-05-30

    Applicant: ANADIGICS, iNC.

    Inventor： Kenneth Sean Ozard

    IPC: H03F3/68 ,  H03F1/32 ,  H03G1/00

    CPC classification number: H03F1/3247 ,  H03F1/0288 ,  H03F1/3276 ,  H03F1/3282 ,  H03F3/68 ,  H03F2200/405 ,  H03F2200/435 ,  H03F2201/3231 ,  H03G1/0017

    Abstract: The present invention implements a series of analog gain and phase correction circuits in each leg of the N-way Doherty to significantly reduce amplitude modulation to amplitude modulation (AM-AM) and amplitude modulation to phase modulation (AM-PM), distortion. The correction blocks comprise gain and phase corrections and optionally an additional gain block. The phase corrections include at least a phase offset and may include an optional non-linear element such as a diode pre-distorter. The pre-distortion circuitry is intended to reduce the necessary complexity of the DPD and reduce the DPD cost and power consumption. The gain and phase corrections can be calculated from computational optimization to minimize the AM-AM and AM-PM distortion. The gain and phase corrections can also be calculated from the AM-AM and AM-PM data which can be output from common DPD systems and laboratory characterization equipment.

    Abstract translation: 本发明在N路Doherty的每个支路中实现了一系列模拟增益和相位校正电路，以显着降低幅度调制到幅度调制（AM-AM）和幅度调制到相位调制（AM-PM）的失真。 校正块包括增益和相位校正以及可选的附加增益块。 相位校正包括至少相位偏移，并且可以包括可选的非线性元件，例如二极管预失真器。 预失真电路旨在减少DPD的必要复杂性，并降低DPD成本和功耗。 可以从计算优化计算增益和相位校正，以最小化AM-AM和AM-PM失真。 增益和相位校正也可以从AM-AM和AM-PM数据计算出来，这些数据可以从普通DPD系统和实验室表征设备输出。

    Distortion compensation apparatus and method therefor
    35.
    发明授权
    Distortion compensation apparatus and method therefor 有权
    失真补偿装置及其方法

    公开(公告)号：US09444412B2

    公开(公告)日：2016-09-13

    申请号：US14446569

    申请日：2014-07-30

    Applicant: FUJITSU LIMITED

    Inventor： Alexander Nikolaevich Lozhkin

    IPC: H03F1/26 ,  H03F1/32 ,  H03G3/30 ,  H03F3/24

    CPC classification number: H03F1/3247 ,  H03F1/26 ,  H03F1/3241 ,  H03F3/24 ,  H03F2201/3227 ,  H03F2201/3231 ,  H03G3/3042

    Abstract: A distortion compensation apparatus includes a pre-distorter, a gain control unit, and a learning unit. The pre-distorter adds distortion according to compensation coefficients to individual input signals prior to the input signals being input to a power amplifier. The gain control unit applies gain control to individual feedback signals fed back from the power amplifier according to a maximum level of the feedback signals within a time frame. The learning unit updates the compensation coefficients used by the pre-distorter, using the feedback signals subjected to the gain control by the gain control unit.

    Abstract translation: 失真补偿装置包括预失真器，增益控制单元和学习单元。 在将输入信号输入到功率放大器之前，预失真器根据补偿系数向单个输入信号添加失真。 增益控制单元根据时间范围内的反馈信号的最大电平对从功率放大器反馈的各个反馈信号进行增益控制。 学习单元使用由增益控制单元进行增益控制的反馈信号来更新由预失真器使用的补偿系数。

    Phase noise correction device and its method
    36.
    发明授权
    Phase noise correction device and its method 有权
    相位噪声校正装置及其方法

    公开(公告)号：US08093943B2

    公开(公告)日：2012-01-10

    申请号：US12526983

    申请日：2008-02-06

    Applicant: Jungo Arai

    Inventor： Jungo Arai

    IPC: H03D3/22 ,  H03D3/24

    CPC classification number: H04B1/0475 ,  H03F1/3247 ,  H03F3/24 ,  H03F2200/451 ,  H03F2201/3231

    Abstract: A phase noise correction device having a function for accurately detecting a phase noise component and capable of reducing a load on a reception device is provided. A phase noise correction device for correcting a phase noise generated in a local oscillator includes: a division section that divides a signal generated in the local oscillator; a reference signal generation section that generates a signal of the same frequency as that of the divided signal; a phase difference detection section that detects a phase difference between the divided signal and the generated reference signal; and a phase noise correction section that gives a phase rotation to a baseband signal in the direction that cancels the phase noise according to the detected phase difference as a phase noise component.

    Abstract translation: 本发明提供一种具有精度检测相位噪声成分并能够减小接收装置的负荷的功能的相位噪声校正装置。 用于校正在本地振荡器中产生的相位噪声的相位噪声校正装置包括：划分部分，其分割在本地振荡器中产生的信号; 参考信号生成部，生成与分频信号相同频率的信号; 相位差检测部，检测所述分频信号与所生成的基准信号之间的相位差; 以及相位噪声校正部，其根据所检测的相位差，将抵消相位噪声的方向的基带信号进行相位旋转，作为相位噪声分量。

    SYSTEMS AND METHODS FOR SIGNAL PREDISTORTION
    38.
    发明申请
    SYSTEMS AND METHODS FOR SIGNAL PREDISTORTION 审中-公开
    用于信号预测的系统和方法

    公开(公告)号：WO2017044647A1

    公开(公告)日：2017-03-16

    申请号：PCT/US2016/050805

    申请日：2016-09-08

    Applicant: HUGHES NETWORK SYSTEMS, LLC

    Inventor： BEIDAS, Bassel, F.

    IPC: H03F1/32 ,  H04L27/36

    CPC classification number: H03F1/3241 ,  H03F1/3258 ,  H03F3/211 ,  H03F3/24 ,  H03F2201/3203 ,  H03F2201/3231 ,  H03F2201/3233 ,  H04B1/0475 ,  H04B2001/0408 ,  H04L27/368

    Abstract: A single or multistage signal predistorter includes an input coupled to receive an information signal comprising input samples and an output coupled to the high power amplifier, the signal predistorter configured to receive an input sample, generate a distortion sample based on an estimate of nonlinearity of the high power amplifier at an operating saturation level, modify the input sample with a correction term to generate a predistortion signal, wherein the correction term is proportional to the distortion sample, and further wherein the predistortion signal comprises the information signal modified to account for nonlinearities in the high power amplifier.

    Abstract translation: 单级或多级信号预失真器包括耦合以接收包括输入样本和耦合到高功率放大器的输出的信息信号的输入端，该信号预失真器被配置为接收输入样本，基于所估计的非线性来产生失真样本 在功率饱和电平下的高功率放大器，用校正项修改输入采样以产生预失真信号，其中所述校正项与所述失真采样成比例，并且其中所述预失真信号包括被修改以消除非线性的信息信号 大功率放大器。

    METHOD AND DEVICE IN A TELECOMMUNICATION SYSTEM
    40.
    发明申请
    METHOD AND DEVICE IN A TELECOMMUNICATION SYSTEM 审中-公开
    电信系统中的方法和设备

    公开(公告)号：WO99023756A1

    公开(公告)日：1999-05-14

    申请号：PCT/SE1998/001991

    申请日：1998-11-03

    IPC: H03C3/08 ,  H03D7/16 ,  H03F1/32 ,  H03F1/34 ,  H04L27/20 ,  H04L27/36 ,  H03G3/20

    CPC classification number: H03F1/34 ,  H03C3/08 ,  H03D7/168 ,  H03F1/3229 ,  H03F1/3247 ,  H03F1/3282 ,  H03F1/3294 ,  H03F1/345 ,  H03F2200/57 ,  H03F2201/3231 ,  H04L27/368

    Abstract: According to the invention, a Cartesian control means (16) comprising a phase rotator (50) and a phase adjuster (52) is provided. With a method and a device according to the invention, a system is provided that is unconditionally stable with respect to non-phase alignment, regardless of input power changes, temperature and component ageing. No certain conditions need to be placed upon the control system to ensure stability, i.e. the system is non-obtrusive and requires no off-line calibration. The inclusion of the phase rotator (50) and phase adjustment techniques into the Cartesian control system makes this possible.

    Abstract translation: 根据本发明，提供了包括相位旋转器（50）和相位调节器（52）的笛卡尔控制装置（16）。 利用根据本发明的方法和装置，提供了无论输入功率变化，温度和组件老化如何，都相对于非相位对准无条件稳定的系统。 控制系统不需要放置某些条件以确保稳定性，即系统不引人注目，不需要离线校准。 将相位旋转器（50）和相位调整技术纳入笛卡尔控制系统使得这成为可能。

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