PREDISTORTION CIRCUIT, WIRELESS COMMUNICATION UNIT AND METHOD FOR COEFFICIENT ESTIMATION
    61.
    发明申请
    PREDISTORTION CIRCUIT, WIRELESS COMMUNICATION UNIT AND METHOD FOR COEFFICIENT ESTIMATION 审中-公开
    预测电路,无线通信单元和系数估计方法

    公开(公告)号:WO2013056660A1

    公开(公告)日:2013-04-25

    申请号:PCT/CN2012/083151

    申请日:2012-10-18

    Abstract: A predistortion circuit is for providing distortion correction in a presence of harmonics. The predistortion circuit includes an input for receiving a digital input signal; an output for providing a digital output signal to an up-conversion element that produces harmonic terms operably coupled to a non-linear device; and a processor operably coupled to an output of the non-linear device for receiving an output radio frequency signal therefrom and arranged to determine a digital correction to be applied to the digital input signal. The processor is further arranged to determine the digital correction that includes a plurality of in-phase and quadrature cross-terms of the digital input signal where terms of a same order have different co-efficients.

    Abstract translation: 预失真电路用于在存在谐波的情况下提供失真校正。 预失真电路包括用于接收数字输入信号的输入端; 用于向上转换元件提供数字输出信号的输出,其产生可操作地耦合到非线性装置的谐波项; 以及可操作地耦合到非线性装置的输出的处理器,用于从其接收输出射频信号,并且被布置成确定要施加到数字输入信号的数字校正。 处理器还被布置成确定包括数字输入信号的多个同相和正交交叉项的数字校正,其中相同阶数的项具有不同的系数。

    RADIO-FREQUENCY TRANSMITTER, SUCH AS FOR BROADCASTING AND CELLULAR BASE STATIONS
    62.
    发明申请
    RADIO-FREQUENCY TRANSMITTER, SUCH AS FOR BROADCASTING AND CELLULAR BASE STATIONS 审中-公开
    无线电频率发射机,如广播和蜂窝基站

    公开(公告)号:WO2013033836A1

    公开(公告)日:2013-03-14

    申请号:PCT/CA2012/050558

    申请日:2012-08-16

    Inventor: ACIMOVIC, Igor

    Abstract: A transmitter that uses a digital pre-distortion (DPD) circuit to mitigate the effects of nonlinearity of a multistage or multi-branch power amplifier. The DPD circuit relies on two or more feedback signals received from an RF-output circuit of the transmitter to generate individually pre-distorted signals for the individual stages/branches of the power amplifier. The use of these individually pre-distorted signals advantageously enables the transmitter to achieve a more efficient suppression of inter-modulation-distortion products than that typically achieved with a comparable prior-art transmitter.

    Abstract translation: 使用数字预失真(DPD)电路来减轻多级或多分支功率放大器的非线性影响的发射机。 DPD电路依赖于从发射机的RF输出电路接收的两个或更多个反馈信号,以产生用于功率放大器的各个级/分支的单独的预失真信号。 使用这些单独的预失真信号有利地使得发射机能够实现比可比现有技术的发射机通常实现的更好的抑制调制失真产物。

    METHOD AND DEVICE FOR PREDISTORTION OF NONLINEAR WIDEBAND AMPLIFIER
    63.
    发明申请
    METHOD AND DEVICE FOR PREDISTORTION OF NONLINEAR WIDEBAND AMPLIFIER 审中-公开
    用于预测非线性宽带放大器的方法和装置

    公开(公告)号:WO2012166060A1

    公开(公告)日:2012-12-06

    申请号:PCT/SI2012/000033

    申请日:2012-06-01

    CPC classification number: H03F1/3294 H03F2200/336

    Abstract: The presented invention discloses a system for nonlinear transfer function compensation of high power amplifiers especially in the case of wideband signal transmission. According to the presented invention the input signal comprising an inphase and quadrature component of an arbitrary modulated digital baseband signal is predistorted in predistortion circuitry and converted form baseband to the radiofrequency band. After digital to analog conversion the analog signal is further processed with shaping filter and amplified by high power amplifier. Predistortion of complex baseband signal is based on a process of splitting the input signal into upper and lower sideband. The individual bands are independently predistorted with complex multiplication with coefficients stored in two independent memories. Selection of the coefficient is based on the instantaneous power of the total input signal. Inphase and quadrature components of the upper and lower sidebands are pairwise summed into inphase and quadrature component of output predistorted signal.

    Abstract translation: 本发明公开了一种用于大功率放大器非线性传递函数补偿的系统,特别是在宽带信号传输的情况下。 根据本发明,包括任意调制数字基带信号的同相和正交分量的输入信号在预失真电路中被预失真,并从基带转换成射频频带。 数模转换后,模拟信号进一步用整形滤波器处理,并由大功率放大器放大。 复基带信号的预失真是基于将输入信号分成上边带和下边带的过程。 单独的频带独立地通过与存储在两个独立存储器中的系数进行复数乘法来预失真。 系数的选择是基于总输入信号的瞬时功率。 上边带和下边带的同相和正交分量成对累加到输出预失真信号的同相和正交分量中。

    FAST ENVELOPE SYSTEM CALIBRATION
    64.
    发明申请
    FAST ENVELOPE SYSTEM CALIBRATION 审中-公开
    快速信封系统校准

    公开(公告)号:WO2012106437A1

    公开(公告)日:2012-08-09

    申请号:PCT/US2012/023495

    申请日:2012-02-01

    Abstract: Disclosed is a transceiver for an envelope following system that includes a power amplifier (PA) having a signal input, a signal output, and a power input that receives power from a power management system that modulates a supply voltage provided to the PA in response to an envelope signal. The transceiver includes a calibration subsystem that is adapted to provide a first test signal to the signal input of the PA and to provide a second test signal to the power management system in place of the envelope signal. The calibration subsystem is programmed with calibration methods that sweep the first test signal through a first range and to sweep the second test signal through a second range in order to derive values that make up a pseudo-envelope look-up table (LUT) that is usable by the transceiver.

    Abstract translation: 公开了一种用于包络跟踪系统的收发器,其包括具有信号输入的功率放大器(PA),信号输出和电力输入,所述功率放大器(PA)从功率管理系统接收功率,该功率管理系统响应于 包络信号。 收发器包括校准子系统,其适于向PA的信号输入提供第一测试信号,并且向电力管理系统提供替代包络信号的第二测试信号。 校准子系统用校准方法进行编程,该校准方法通过第一范围扫描第一测试信号,并扫描第二测试信号通过第二范围,以得到构成伪包络查找表(LUT)的值 由收发器使用。

    増幅装置
    65.
    发明申请
    増幅装置 审中-公开
    放大器件

    公开(公告)号:WO2012096337A1

    公开(公告)日:2012-07-19

    申请号:PCT/JP2012/050459

    申请日:2012-01-12

    Inventor: 本江 直樹

    Abstract:  課題 例えば、ET増幅器で、効果的に、振幅対電源電圧特性を制御する。 解決手段 入力信号を増幅する増幅装置において、増幅手段4が入力信号を増幅し、増幅制御手段5、7が入力信号に基づいて増幅手段への電源電圧を制御し、第1の検出手段14が入力信号と増幅手段により増幅された後の信号を帰還させた帰還信号との増幅率を検出し、第2の検出手段14が入力信号の振幅の値又は範囲毎に増幅率の分散を検出し、増幅制御更新手段14が分散が所定の閾値より大きい振幅の値又は範囲について電源電圧をより大きくするように更新し、分散が所定の閾値より小さい振幅の値又は範囲について電源電圧をより小さくするように更新する。

    Abstract translation: [问题]例如,为了有效地控制ET放大器的幅度/电源电压特性。 解决方案用于放大输入信号的放大装置,其中:放大装置(4)放大输入信号; 放大控制装置(5,7)根据输入信号控制放大装置的电源电压; 第一检测装置(14)检测输入信号与通过放大装置放大的信号的反馈获得的反馈信号之间的放大系数; 第二检测装置(14)在每个范围内检测输入信号的幅度值或放大因子的方差; 并且放大控制更新装置(14)执行更新以便相对于表现出超过预定阈值的方差的振幅值或范围增加电源电压,或者相对于幅度减小电源电压 表现出低于预定阈值的方差的值或范围。

    REMOTELY RECONFIGURABLE POWER AMPLIFIER SYSTEM AND METHOD
    66.
    发明申请
    REMOTELY RECONFIGURABLE POWER AMPLIFIER SYSTEM AND METHOD 审中-公开
    远程可重新配置的功率放大器系统及方法

    公开(公告)号:WO2010124297A8

    公开(公告)日:2011-07-07

    申请号:PCT/US2010032453

    申请日:2010-04-26

    CPC classification number: H03F1/3247 H03F1/3294 H03F3/24

    Abstract: A system and method for remotely monitoring, communicating with, and reconfiguring power amplifier systems. A communications link is provided in field- deployed PA systems, for enabling remote communication with appropriate digital components such as microprocessors or other communications-capable portions of the power amplifier systems. The communications link permits operating parameters of the PA to be monitored and sent back to a remote terminal such as a web server or other computer mainframes via any suitable wired or wireless connection including internet, Ethernet, wireless, WiFi, WiMAX, cellular, local area networks (LAN), wide area networks (WAN), Bluetooth, and so forth. The communication is bi-directional, so that the remote host can download to the PA updates, cMobile operators and/or other service providers can reduce significant operating and capital expenses related to their radio networks maintenance and PA replacement by practicing this invention.

    Abstract translation: 用于远程监控,通信和重新配置功率放大器系统的系统和方法。 在现场部署的PA系统中提供通信链路,以实现与诸如微处理器或功率放大器系统的其它可通信功能部分的适当数字组件的远程通信。 通信链路允许PA的操作参数被监视并通过任何合适的有线或无线连接(包括因特网,以太网,无线,WiFi,WiMAX,蜂窝,局域)发送回诸如web服务器或其他计算机主机的远程终端 网络(LAN),广域网(WAN),蓝牙等。 该通信是双向的,使得远程主机可以下载到PA更新,cMobile运营商和/或其他服务提供商可以通过实践本发明来减少与其无线电网络维护和PA替换相关的显着的运营和资本费用。

    歪補償回路及び歪補償方法
    68.
    发明申请
    歪補償回路及び歪補償方法 审中-公开
    失真补偿电路和失真补偿方法

    公开(公告)号:WO2009145283A1

    公开(公告)日:2009-12-03

    申请号:PCT/JP2009/059830

    申请日:2009-05-22

    Inventor: 芦田順也

    Abstract:  歪補償後の信号の信号レベルを制限し、歪補償効果を向上させることができる歪補償回路及び歪補償方法を提供する。  本発明の歪補償回路は、外部からの入力信号の信号レベルを第1の制限値以下に制限し、歪補償前信号を出力する入力レベル制限手段と、歪補償係数に基づいて、歪補償前信号に対して歪補償処理を行い、歪補償後信号を出力する歪補償手段と、歪補償後信号を増幅した増幅器の出力信号の一部と歪補償前信号との差に基づいて、増幅器の出力信号の歪を補償するための係数を、歪補償係数として算出する歪補償係数算出手段と、歪補償前信号の信号レベルに対応付けて、歪補償係数を記憶する記憶手段と、記憶手段に記憶された歪補償係数に基づいて、歪補償処理を行ったときの信号レベルが、増幅器への入力信号の信号レベルの制限値である第2の制限値以下になるときの歪補償前信号の信号レベルを、第1の制限値として算出する制限値算出手段を備える。

    Abstract translation: 提供了能够限制后失真补偿信号的信号电平并提高失真补偿效果的失真补偿电路和失真补偿方法。 失真补偿电路设置有:输入电平限制装置,其将外部输入信号的电平限制在不超过第一限制值,并输出预失真补偿信号; 失真补偿装置根据失真补偿系数对预失真补偿信号进行失真补偿,并输出失真后补偿信号; 失真补偿系数计算装置,其基于预失真补偿信号和放大后失真补偿信号的放大器的输出信号的一部分之间的差计算用于补偿失真补偿信号的失真的失真补偿系数 来自放大器的输出信号; 存储装置,其将所述失真补偿系数与所述预失真补偿信号的电平相关联并存储所述系数; 以及限制值计算装置,其基于存储在存储装置中的失真补偿系数,计算当失真补偿后的信号电平小于或等于预失真补偿信号时的第一极限值 到第二极限值,其是输入到放大器的输入信号的电平的极限值。

    LINEARIZATION OF RF POWER AMPLIFIERS USING AN ADAPTIVE SUBBAND PREDISTORTER
    70.
    发明申请
    LINEARIZATION OF RF POWER AMPLIFIERS USING AN ADAPTIVE SUBBAND PREDISTORTER 审中-公开
    使用自适应子载波预测器对RF功率放大器进行线性化

    公开(公告)号:WO2008106364A1

    公开(公告)日:2008-09-04

    申请号:PCT/US2008/054637

    申请日:2008-02-22

    CPC classification number: H03F1/3247 H03F1/3294 H03F3/24

    Abstract: Predistorting an input signal prior to amplification in an RF power amplifier (206) includes isolating a plurality sub-band signals, each representing a portion of the input signal s(t). The method includes independently modifying an amplitude and a phase of each of the plurality of sub-band signals. The modification of the amplitude and/or phase is performed using a set of signal weighting parameters (weights) w and W, controlling linear and nonlinear modifications respectively, which are determined in an adaptive process by an adaptive controller (224). After modification, each of the sub-bands are summed together to obtain a predistorted input signal for an RF power amplifier (206).

    Abstract translation: 在RF功率放大器(206)中放大之前预失真输入信号包括隔离多个子带信号,每个子带信号表示输入信号s(t)的一部分。 该方法包括独立地修改多个子带信号中的每一个的振幅和相位。 使用一组信号加权参数(权重)w和W来执行幅度和/或相位的修改,分别控制在自适应控制器(224)的自适应处理中确定的线性和非线性修改。 在修改之后,将每个子带相加在一起以获得用于RF功率放大器(206)的预失真输入信号。

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