公开(公告)号：WO2003051011A1

公开(公告)日：2003-06-19

申请号：PCT/US2002/026950

申请日：2002-08-16

Applicant: AGERE SYSTEMS, INC. ,  SUN, Yanling ,  BUSKING, Erik, B.

Inventor： SUN, Yanling ,  BUSKING, Erik, B.

IPC: H04L27/36

CPC classification number: H04L27/368 ,  H03F1/3247 ,  H03F1/3294

Abstract: The present invention provides, for use in a radio frequency (RF) transmitter that employs a power amplifier to transmit broadband signals, the power amplifier introducing amplitude and phase distortion, a group delay precompensator circuit. In one embodiment, the group delay precompensator circuit includes: (1) a Cartesian feedback loop coupled between an output of the power amplifier and an input of the RF transmitter; and (2) a group delay compensation block, located in the Cartesian feedback loop, that introduces an opposing phase characteristic into the Cartesian feedback loop and thereby precompensates for the phase distortion. A method of precompensating a group delay and an RF transmitter incorporating the precompensator or the method are also disclosed.

Abstract translation: 本发明提供了一种用于使用功率放大器传输宽带信号的射频（RF）发射机，引入幅度和相位失真的功率放大器，组延迟预补偿电路。 在一个实施例中，组延迟预补偿器电路包括：（1）耦合在功率放大器的输出端和RF发射器的输入端之间的笛卡尔反馈回路; 和（2）位于笛卡尔反馈回路中的组延迟补偿块，其将相对相位特性引入到笛卡尔反馈回路中，从而对相位失真进行预补偿。 还公开了一种预补偿组延迟的方法和包含预补偿器的方法的RF发射机。

公开(公告)号：WO2003030353A2

公开(公告)日：2003-04-10

申请号：PCT/GB2002/004388

申请日：2002-09-27

Applicant: ROKE MANOR RESEARCH LIMITED ,  DOMOKOS, John

Inventor： DOMOKOS, John

IPC: H03F

CPC classification number: H03F1/3258 ,  H03F1/3294

Abstract: An amplifier pre-distorter method and apparatus squares and input signal and splits the signal into inphase and quadrature parts which are processed to generate a polynomial predistortion signal. This simplifies the apparatus and enables implementation in an application specific integrated circuit.

Abstract translation: 放大器预失真器方法和设备对输入信号进行平方和输入，并将信号分成同相和正交部分，处理该同相和正交部分以生成多项式预失真信号。 这简化了设备并且使得可以在专用集成电路中实施。

公开(公告)号：WO2002067445A1

公开(公告)日：2002-08-29

申请号：PCT/NZ2002/000023

申请日：2002-02-25

Applicant: THE UNIVERSITY OF BRISTOL ,  MANN, Stephen, Ian ,  BEACH, Mark, Antony

Inventor： MANN, Stephen, Ian ,  BEACH, Mark, Antony

IPC: H04B1/12

CPC classification number: H03G3/3042 ,  H03F1/3247 ,  H03F1/3294 ,  H03F1/34 ,  H03F3/24 ,  H04B2001/0433

Abstract: A Cartesian loop system for radio transmitters in which at least part of the baseband processing is carried out in the digital domain. Digital processing circuitry (250) combines a baseband input signal with a Cartesian feedback signal (206, 207) to generate a forward signal. Analog circuitry (221, 201, 203, 204) converts the forward signal into a transmission output signal and generates the Cartesian feedback signal. Preferably the digital processing circuitry applies a phase shift process (208) to the Cartesian feedback signal before combination with the baseband input signal. The system is programmable allowing a single device to be used in a range of transmitters under different radio standards.

Abstract translation: 用于无线电发射机的笛卡尔回归系统，其中至少部分基带处理在数字域中进行。 数字处理电路（250）将基带输入信号与笛卡尔反馈信号（206,207）组合以产生正向信号。 模拟电路（221,201,203,204）将前向信号转换为传输输出信号并产生笛卡尔反馈信号。 优选地，数字处理电路在与基带输入信号组合之前将相移处理（208）应用于笛卡尔反馈信号。 该系统是可编程的，允许单个设备在不同无线电标准的一系列发射机中使用。

公开(公告)号：WO02017586A1

公开(公告)日：2002-02-28

申请号：PCT/EP2000/008096

申请日：2000-08-18

IPC: H03F1/32 ,  H04L27/36

CPC classification number: H03F1/3294 ,  H03F1/3247 ,  H03F2201/3206 ,  H03F2201/3233 ,  H04L27/368

Abstract: The present invention relates to a multicarrier circuit arrangement and a method for linearising a multicarrier circuit arrangement in which frequency channels are combined by using a complex mixing operation to generate a single composite complex signal, so as to achieve a complex channel separation. A predistorted complex signal is then generated by applying a complex predistortion to said complex signal. Thereby, an efficient linearisation of wideband multicarrier circuit arrangements can be achieved, since the bandwidth requirements of digital predistortion are relaxed by enabling a baseband predistortion of multicarrier signals. Furthermore, combining different frequency chan-nels at digital baseband domain makes it possible to use only one transmit chain, which means considerable reduction in the needed amount of digital/analogue components. Fore-mentioned can also be applied to feedback chain, i.e. all the frequency channels can be down-converted to predis-torter for calculation of new predistortion coefficients with only one down-conversion chain. Only one baseband pre-distorter is needed to linearise all the transmitted infor-mation because of complex channel separation. All of the intelligence and adaptivity in the proposed system is lo-cated in the digital domain, thereby enabling stable and accurate control of the transmitted signal in every operat-ing conditions.

Abstract translation: 本发明涉及一种多载波电路装置和一种线性化多载波电路装置的方法，其中通过使用复合混合操作来组合频率信道以产生单个复合复合信号，从而实现复杂的信道分离。 然后通过对复合信号应用复数预失真来生成预失真的复信号。 因此，可以实现宽带多载波电路布置的有效线性化，因为通过启用多载波信号的基带预失真来放宽数字预失真的带宽需求。 此外，在数字基带领域组合不同的频率通道可以仅使用一个发送链，这意味着所需数量/模拟组件的数量大大减少。 前面提到的也可以应用于反馈链，即，可以将所有的频道下变频到预先转换器，以仅用一个下变频链来计算新的预失真系数。 由于复杂的信道分离，因此只需要一个基带预失真器对所有传输的信息进行线性化。 所提出的系统中的所有智能和适应性都落在数字领域，从而能够在每个操作条件下对传输信号进行稳定和准确的控制。

公开(公告)号：WO01008320A1

公开(公告)日：2001-02-01

申请号：PCT/JP1999/004037

申请日：1999-07-28

IPC: H03F1/32 ,  H03G3/32 ,  H03G5/16 ,  H04B3/04 ,  H03G3/30 ,  H04L27/00

CPC classification number: H03G5/165 ,  H03F1/3247 ,  H03F1/3258 ,  H03F1/3294 ,  H03F2201/3224 ,  H03F2201/3233

Abstract: A distortion compensating coefficient corresponding to the electric power or amplitude of the transmission signal of the present and the past is read from a memory which stores distortion compensating coefficients for correcting a power amplifier for transmission. The transmission signal is subjected to a compensation process according to the distortion compensation coefficient. The power amplifier amplifies and transmits the transmission signal after the distortion compensation, and the distortion compensation coefficients are updated based on the transmission signals before and after the distortion compensation.

Abstract translation: 从存储用于校正功率放大器进行发送的失真补偿系数的存储器读取与当前和过去的发送信号的电功率或振幅对应的失真补偿系数。 根据失真补偿系数对发送信号进行补偿处理。 功率放大器在失真补偿之后放大并发送发送信号，并且基于失真补偿之前和之后的发送信号来更新失真补偿系数。

公开(公告)号：WO01005026A1

公开(公告)日：2001-01-18

申请号：PCT/IB2000/001049

申请日：2000-07-13

IPC: H03F1/32

CPC classification number: H03F1/3247 ,  H03F1/3241 ,  H03F1/3294 ,  H03F2201/3209 ,  H03F2201/3233

Abstract: A predistortion system comprises a digital compensation signal processing component (DCSP) (52) which predistorts a wideband input transmission signal to compensate for the frequency and time dependent AM-AM and AM-PM distortion characteristics of a non-linear amplifier (64). The DCSP (52) comprises a data structure (52H) in which each element stores a set of compensation parameters (preferably including FIR filter coefficients) for predistorting the input transmission signal. The parameter sets are preferably indexed within the data structure (52H) according to multiple signal characteristics, such as instantaneous amplitude and integrated signal envelope, each of which corresponds to a respective dimension of the data structure (52H). To predistort the input transmission signal, an addressing circuit (52C-52G) digitally generates a set of data structure indices from the input transmission signal, and the indexed set of compensation parameters is loaded into a compensation circuit (52A, 52B) which digitally predistorts the input transmission signal. This process of loading new compensation parameters into the compensation circuit (52A, 52B) is preferably repeated every sample instant, so that the predistortion function varies from sample-to-sample. The sets of compensation parameters are generated periodically and written to the data structure (52H) by an adaptive control processing and compensation estimator (ACPCE) (70) taht performs a non-real-time analysis of amplifier input and output signals. The ACPCE (70) also implements various system identification processes for measuring the characteristics of the power amplifier (64) and generating initial sets of filter coefficients. In an antenna array embodiment (Figures 33 and 34), a single ACPCE (70) generates the compensation parameters sets for each of multiple amplification chains (64) on a time-shared basis. In an embodiment (Figure 32) in which the amplification chain (64) includes multiple nonlinear amplifiers (60A) that can be individually controlled (e.g., turned ON and OFF) to conserve power, the data structure (52H) separately stores compensation parameter sets for each operating state of the amplification chain (64).

Abstract translation: 预失真系统包括数字补偿信号处理部件（DCSP）（52），该数字补偿信号处理部件预调制宽带输入传输信号以补偿非线性放大器（64）的频率和时间相关的AM-AM和AM-PM失真特性。 DCSP（52）包括数据结构（52H），其中每个元件存储用于预失真输入传输信号的一组补偿参数（优选地包括FIR滤波器系数）。 根据多个信号特性，例如瞬时幅度和积分信号包络，参数组优选地在数据结构（52H）内进行索引，每个信号特征对应于数据结构（52H）的相应尺寸。 为了预设输入传输信号，寻址电路（52C-52G）从输入的传输信号数字地生成一组数据结构索引，并将索引的补偿参数集合加载到数字预失真的补偿电路（52A，52B）中 输入传输信号。 优选地，在每个采样时刻重复将新的补偿参数加载到补偿电路（52A，52B）中的过程，使得预失真函数随样本到样本而变化。 通过自适应控制处理和补偿估计器（ACPCE）（70）执行放大器输入和输出信号的非实时分析，周期性地生成补偿参数集合并将其写入数据结构（52H）。 ACPCE（70）还实现用于测量功率放大器（64）的特性并产生初始滤波器系数集合的各种系统识别过程。 在天线阵列实施例（图33和34）中，单个ACPCE（70）在时间共享的基础上为多个放大链（64）中的每一个生成补偿参数集。 在其中放大链（64）包括可以单独控制（例如，导通和关断）以节省功率的多个非线性放大器（60A）的实施例（图32）中，数据结构（52H）分别存储补偿参数集 对于扩增链（64）的每个操作状态。

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。

公开(公告)号：WO1998000908A1

公开(公告)日：1998-01-08

申请号：PCT/IB1997000764

申请日：1997-06-23

Applicant: PHILIPS ELECTRONICS N.V. ,  PHILIPS PATENTVERWALTUNG GMBH ,  PHILIPS NORDEN AB

Inventor： PHILIPS ELECTRONICS N.V. ,  PHILIPS PATENTVERWALTUNG GMBH ,  PHILIPS NORDEN AB ,  SWALES, Nicolas, David

IPC: H03F01/32

CPC classification number: H03F1/3247 ,  H03D7/168 ,  H03F1/3294 ,  H03F1/345 ,  H03F2200/57 ,  H04L2027/0016

Abstract: The invention relates to a circuit arrangement comprising a Cartesian amplifier. The invention aims at providing an arrangement for an accurate control of phase errors in the phase locked loop of the amplifier. This is achieved by a control circuit (33) having an input for receiving the envelope curve signal (32); an output for an adjustment signal for adjusting the phase position of the local oscillator (31); a modulation output for producing a measuring oscillation; and a modulation stage for modulating the phase position of the local oscillator (34). The control circuit minimises the signal portion of the envelope signal that results from the modulation with the measuring oscillation. The invention can be applied in a transmitter of a mobile radio equipment.

Abstract translation: 本发明涉及一种包括笛卡尔放大器的电路装置。 本发明旨在提供一种用于精确控制放大器的锁相环中的相位误差的装置。 这通过具有用于接收包络线信号（32）的输入的控制电路（33）来实现。 用于调整本地振荡器（31）的相位位置的调整信号的输出; 用于产生测量振荡的调制输出; 以及用于调制本地振荡器（34）的相位位置的调制级。 控制电路使由测量振荡的调制产生的包络信号的信号部分最小化。 本发明可以应用于移动无线电设备的发射机。

公开(公告)号：WO2016078038A1

公开(公告)日：2016-05-26

申请号：PCT/CN2014/091668

申请日：2014-11-19

Applicant: 华为技术有限公司

Inventor： 赵延青 ,  余春蕾 ,  田廷剑

IPC: H03F1/32

CPC classification number: H04L27/368 ,  H03F1/3247 ,  H03F1/3258 ,  H03F1/3294 ,  H03F3/189 ,  H03F3/245 ,  H03F2200/102 ,  H03F2201/32 ,  H03F2201/3233 ,  H04L25/03343

Abstract: 本发明提供一种预失真处理的装置及方法，装置包括：辅助反馈模块，用于从模拟信号中提取非线性失真信号，将获取的与非线性失真信号对应的反馈信号输入辅助模型系数训练模块；辅助模型系数训练模块，用于根据反馈信号、预失真信号对辅助系数进行训练，并将训练得到的第一辅助系数传递给预失真处理模块；射频信号反馈模块，用于提取基波反馈信号；预失真模型系数训练模块，用于根据预失真信号、基波反馈信号对预失真系数进行训练，将得到的预失真系数传递给预失真处理模块；预失真处理模块，用于根据第一辅助系数和预失真系数进行非线性建模，并对输入的中频信号进行预失真处理，并将预失真处理得到的预失真信号输出。

公开(公告)号：WO2014113227A1

公开(公告)日：2014-07-24

申请号：PCT/US2014/010277

申请日：2014-01-06

Applicant: MOTOROLA MOBILITY LLC

Inventor： NAGODE, Thomas D. ,  BLACK, Gregory R. ,  GOEDKEN, Ryan J.

IPC: H03F1/02 ,  H03F1/30 ,  H03F1/32 ,  H03F3/189 ,  H03F3/24

CPC classification number: H04B1/62 ,  H03F1/0227 ,  H03F1/30 ,  H03F1/3247 ,  H03F1/3294 ,  H03F3/189 ,  H03F3/245 ,  H03F2200/06 ,  H03F2200/09 ,  H03F2200/102 ,  H03F2200/336 ,  H03F2200/375 ,  H03F2200/447 ,  H03F2201/3233 ,  H03G3/00

Abstract: A method and system enhances the gain of a propagation path of a radio frequency (RF) signal while utilizing an envelope tracking (ET) mechanism to provide power to a power amplifier within the propagation path. An envelope tracking (ET) controller detects using the ET mechanism an RF envelope of the RF signal being propagated towards the power amplifier. The ET controller applies envelope pre-distortion to the RF signal. The ET controller initiates a function for shaping the supply voltage of the power amplifier by selecting a shaping table that can provide a specific level of increasing amplifier gain at higher signal drive level. The ET controller shapes the supply voltage for the power amplifier by adjusting values corresponding to the detected RF envelope. As a result, RF signals are propagated from the transceiver to the power amplifier output port across high and low transceiver drive levels with net constant gain.

Abstract translation: 一种方法和系统增强射频（RF）信号的传播路径的增益，同时利用包络跟踪（ET）机制向传播路径内的功率放大器提供功率。 信封跟踪（ET）控制器使用ET机制检测RF信号的RF包络向功率放大器传播。 ET控制器将包络预失真应用于RF信号。 ET控制器通过选择一个可在较高信号驱动电平下提供特定电平增加放大器增益的整形表，启动整形功率放大器电源电压的功能。 ET控制器通过调整与检测到的RF包络相对应的值来形成功率放大器的电源电压。 结果，射频信号从收发器传播到功率放大器输出端口，可以通过具有净恒定增益的高和低收发器驱动电平。