LINEAR RF TRANSMITTER AND METHOD OF OPERATION
    11.
    发明申请
    LINEAR RF TRANSMITTER AND METHOD OF OPERATION 审中-公开
    线性RF发射器和操作方法

    公开(公告)号:WO2007059484A2

    公开(公告)日:2007-05-24

    申请号:PCT/US2006060866

    申请日:2006-11-14

    Abstract: A linear RF transmitter (100) includes a forward path (102, 105, 107) for receiving and processing a baseband input signal, the forward path including an upconverting mixer (120, 122) operable to convert a baseband signal into a modulated RF signal, and a RF (radio frequency) power amplifier (126) operable to amplify a modulated RF signal produced by the mixer, a non-linearity detector (125) connected to the forward path to sample a baseband signal for delivery to the mixer and operable to detect non-linearity of the transmitter and to provide in response a control signal to change operation of the transmitter to reduce the non-linearity, and characterised in that the transmitter further includes a regulator (111) connectible to a supply voltage source (113) and to the RF power amplifier to deliver a variable supply voltage (VS) to the RF power amplifier and a controller (127) operable to produce a control signal which controls adjustment by the regulator (111) of the supply voltage, wherein the non-linearity detector is connected to the controller and is operable upon detecting non-linearity to deliver a control signal to the controller which causes the controller to adjust the regulator to increase the supply voltage. Also described is a method of operation (200) in the transmitter.

    Abstract translation: 线性RF发射器(100)包括用于接收和处理基带输入信号的正向路径(102,105,107),所述前向路径包括上变频混频器(120,122),可操作以将基带信号转换成调制的RF信号 ,以及RF(射频)功率放大器(126),其可操作以放大由混频器产生的调制的RF信号;非线性检测器(125),连接到前向路径以采样基带信号以传送到混频器并且可操作 以检测发射机的非线性并且响应地提供控制信号以改变发射器的操作以减小非线性,并且其特征在于,所述发射机还包括可连接到电源电压源(113)的调节器(111) )和所述RF功率放大器以向所述RF功率放大器传送可变电源电压(VS);以及控制器(127),其可操作以产生控制信号,所述控制信号控制所述调节器(111)对所述电源电压的调节,w 这里,非线性检测器连接到控制器,并且在检测到非线性时可操作以将控制信号传送到控制器,这使得控制器调节调节器以增加电源电压。 还描述了发射机中的操作方法(200)。

    歪補償装置
    12.
    发明申请
    歪補償装置 审中-公开
    失真补偿装置

    公开(公告)号:WO2007036990A1

    公开(公告)日:2007-04-05

    申请号:PCT/JP2005/017792

    申请日:2005-09-28

    CPC classification number: H03F1/3247 H03F1/3294 H03F2200/336 H03F2201/3233

    Abstract:  本発明の歪補償装置は、入力信号を増幅する増幅器と、増幅器に入力される入力信号と増幅器から出力される出力信号とに基づいて、入力信号の振幅レベルに対応する増幅器の歪補償係数を求める演算部と、演算部が求めた歪補償係数を入力信号の振幅レベルに対応づけられた書き込みアドレスに記憶するメモリと、メモリの読み出しアドレスから歪補償係数を読み出して、当該歪補償係数を用いて入力信号の歪補償処理を行う歪補償処理部と、入力信号の振幅レベルに基づいて、書き込みアドレスと読み出しアドレスを生成するアドレス生成部とを備え、アドレス生成部は、入力信号の振幅レベルに基づいて求めた第一のアドレスを書き込みアドレスとし、第一のアドレスに近接する第二のアドレスを読み出しアドレスとする。

    Abstract translation: 失真补偿装置包括:放大器,用于放大输入信号;计算部分,用于根据来自输入信号的输入信号的幅度电平和来自放大器的输出信号确定放大器的失真补偿系数;存储器,用于存储 在与输入信号的幅度电平相关联的写入地址处确定的失真补偿系数,用于从存储器的读取地址读取失真补偿系数并通过使用失真补偿系数补偿输入信号的失真的失真补偿部分 以及用于根据输入信号的幅度电平创建写入地址和读取地址的地址创建部分。 地址创建部分根据作为写入地址的输入信号的幅度电平和靠近第一地址的第二地址作为读取地址来创建第一地址。

    EQUALIZED SIGNAL PATH WITH PREDICTIVE SUBTRACTION SIGNAL
    13.
    发明申请
    EQUALIZED SIGNAL PATH WITH PREDICTIVE SUBTRACTION SIGNAL 审中-公开
    均衡信号路径与预测收敛信号

    公开(公告)号:WO2005072331A3

    公开(公告)日:2006-11-30

    申请号:PCT/US2005002313

    申请日:2005-01-24

    Abstract: A digital communication transmitter serves as a signal path (10) which uses an adaptive equalizer (18) in a predistortion role. The adaptive equalizer (18) pre-distorts a complex digital communication signal (12) that need not exhibit any distortion. Subsequent analog distortion­introducing segments (24, 30, 36, 42) then distort a predistorted signal (22) output from the adaptive equalizer (18). An error signal (46) is formed from a reference signal (52) and a return signal (54). The equalizer (18) implements an adaptation algorithm that adjusts filter (68) coefficients to minimize correlation between one of the reference and return signals (52, 54) and the error signal (46). The equalizer (18) generates four sets of coefficients for four different filters. Consequently, the equalizer (18) exhibits four degrees of freedom in introducing predistortion into a complex signal to counter the distortion subsequently introduced in the signal path (10) by the distortion-introducing segments (24, 30, 36, 42).

    Abstract translation: 数字通信发射机用作使用预失真角色的自适应均衡器(18)的信号路径(10)。 自适应均衡器(18)预失真不需要出现任何失真的复数数字通信信号(12)。 随后的模拟失真引入段(24,30,36,42)使从自适应均衡器(18)输出的预失真信号(22)失真。 误差信号(46)由参考信号(52)和返回信号(54)形成。 均衡器(18)实现调整滤波器(68)系数以使参考和返回信号(52,54)之一与误差信号(46)之间的相关性最小化的自适应算法。 均衡器(18)为四个不同的滤波器生成四组系数。 因此,均衡器(18)具有四个自由度,将预失真引入到复信号中,以对抗由失真引入段(24,30,36,42)随后引入到信号路径(10)中的失真。

    IQ-MODULATOR PRE-DISTORTION
    15.
    发明申请
    IQ-MODULATOR PRE-DISTORTION 审中-公开
    IQ调制器预失真

    公开(公告)号:WO2006091130A1

    公开(公告)日:2006-08-31

    申请号:PCT/SE2005/000266

    申请日:2005-02-24

    Inventor: DALIPI, Spendim

    CPC classification number: H03F1/3294 H03F1/3247 H03F2200/57 H04L27/364

    Abstract: An IQ -modulator pre-distorter includes an iteratively updated digital filter ( gQ 0 , gQ 1 ) for filtering one of the branches of an IQ -signal to compensate for IQ - modulator generated amplitude errors. An iteratively updated digital filter ( cQI 0 , cQI 1 ), cross-connected from one of the branches to the other branch, filters one of the components of an IQ -signal to compensate for IQ -modulator generated inter-modulation between the branches. Iteratively updated compensators ( dcI, dcQ ) counteract IQ -modulator generated offset errors.

    Abstract translation: IQ调制器预失真器包括迭代更新的数字滤波器(gQ

    A RADIO TRANSMITTER AND A METHOD OF OPERATING A RADIO TRANSMITTER
    16.
    发明申请
    A RADIO TRANSMITTER AND A METHOD OF OPERATING A RADIO TRANSMITTER 审中-公开
    无线电发射机和无线电发射机的操作方法

    公开(公告)号:WO2006006909A1

    公开(公告)日:2006-01-19

    申请号:PCT/SE2005/000966

    申请日:2005-06-21

    Abstract: By the present invention is provided an inventive radio transmitter and a method to operate a radio transmitter, by which the quality of a transmitted radio signal can be improved. The radio transmitter comprises at least one digital filter having adjustable parameters. Via a control signal input the transmitter can receive a feedback signal being indicative of the output signal from the transmitter. The radio transmitter comprises programmable digital circuitry adapted to analyzing the feedback signal and to generating an analysis result. The programmable digital circuitry is further adapted to adjusting the adjustable parameters of the digital filter in accordance with the analysis result.

    Abstract translation: 通过本发明提供本发明的无线电发射机和操作无线电发射机的方法,由此可以提高发射的无线电信号的质量。 无线电发射机包括具有可调参数的至少一个数字滤波器。 通过输入的控制信号,发射机可以接收指示来自发射机的输出信号的反馈信号。 无线电发射机包括适于分析反馈信号并产生分析结果的可编程数字电路。 可编程数字电路还适于根据分析结果调整数字滤波器的可调参数。

    EFFICIENT GENERATION OF RADIO FREQUENCY CURRENTS
    17.
    发明申请
    EFFICIENT GENERATION OF RADIO FREQUENCY CURRENTS 审中-公开
    无线电频率的有效产生

    公开(公告)号:WO2004001958A1

    公开(公告)日:2003-12-31

    申请号:PCT/SE2003/001068

    申请日:2003-06-19

    CPC classification number: H03F1/0266 H03F1/3294

    Abstract: In the present invention, pre-distortion of drive signal (26) and generation of bias signal (36) to a power amplifier are both controlled dependent on an instantaneous size of the input signal, for producing a predetermined gain characteristics. Preferably, the bias signal (36) is kept low in amplitude ranges having a high probability to occur, thus giving a high efficiency, and is allowed to increase towards higher amplitudes, preferably all the way to the maximum amplitude. The pre-distorted drive signal (26) is preferably higher than the input signal in the high-efficiency ranges. Preferably, the drive signal (26) is predominantly composed of low-order components. In cases where signal paths of bias signal (36) and drive signal (26) differs significantly, inverse filtering is applied to ensure the simultaneousness at he input of the amplitude element.

    Abstract translation: 在本发明中,驱动信号(26)的预失真和对功率放大器的偏置信号(36)的产生都是根据输入信号的瞬时大小进行控制的,以产生预定的增益特性。 优选地,偏置信号(36)在具有高概率发生的幅度范围内保持较低,从而提供高效率,并且允许偏向信号(36)向较高幅度增加,优选地一直向最大幅度增加。 预失真驱动信号(26)优选地高于高效率范围内的输入信号。 优选地,驱动信号(26)主要由低阶分量组成。 在偏置信号(36)和驱动信号(26)的信号路径显着不同的情况下,应用反向滤波以确保振幅元件输入时的同时性。

    COORDINATE ROTATION OF PRE-DISTORTION VECTOR IN FEEDFORWARD LINEARIZATION AMPLIFICATION SYSTEM
    18.
    发明申请
    COORDINATE ROTATION OF PRE-DISTORTION VECTOR IN FEEDFORWARD LINEARIZATION AMPLIFICATION SYSTEM 审中-公开
    前馈线性放大系统中前置放大矢量的协调旋转

    公开(公告)号:WO2003105337A1

    公开(公告)日:2003-12-18

    申请号:PCT/SE2003/000898

    申请日:2003-06-03

    Inventor: RYDIN, Arne

    CPC classification number: H03F1/3229 H03F1/3282 H03F1/3294 H03F2201/3212

    Abstract: An amplifier system (120, 820) for radio frequency signals comprises a phase and gain adjuster (122) which receives an input signal and a control vector (C) for producing a distortion-adjusted input signal. The distortion-adjusted input signal is applied to a main amplifier (126) which generates an amplified output signal. A control loop generates a control vector (P) indicative of distortion of the main amplifier. A modified pre-distortion vector generator (199, 899) generates a modified pre-distortion vector (P') which is combined with the control vector to produce a composite control vector (Comp). The composite control vector is applied to the phase and gain adjuster, thereby enabling the phase and gain adjuster to produce the distortion-adjusted input signal. In essence, the modified pre-distortion vector generator performs a vector multiplication (coordinate rotation) of a pre-distortion vector so that the resultant modified pre-distortion vector has a proper direction relative to the control vector.

    Abstract translation: 用于射频信号的放大器系统(120,820)包括接收输入信号的相位和增益调节器(122)和用于产生经失真调整的输入信号的控制矢量(C)。 失真调整的输入信号被施加到产生放大的输出信号的主放大器(126)。 控制环路产生指示主放大器失真的控制矢量(P)。 修改的预失真向量生成器(199,899)生成与控制向量组合以产生复合控制向量(Comp)的修改的预失真向量(P')。 将复合控制矢量应用于相位和增益调节器,从而使相位和增益调节器产生失真调整的输入信号。 本质上,修正的预失真向量生成器执行预失真向量的向量乘法(坐标旋转),使得所得到的修改的预失真向量相对于控制向量具有适当的方向。

    CONTROL SCHEME FOR SIGNAL PROCESSING ARRANGEMENT
    20.
    发明申请
    CONTROL SCHEME FOR SIGNAL PROCESSING ARRANGEMENT 审中-公开
    信号处理装置的控制方案

    公开(公告)号:WO02103891A3

    公开(公告)日:2003-10-16

    申请号:PCT/GB0202661

    申请日:2002-06-12

    CPC classification number: H03F1/3294 H03F1/3223 H03F1/3247

    Abstract: The control scheme uses the input and output signals of an amplifier (10) to control a lineariser (24) operating on the amplifier (10). The input and output signals are sensed and used to develop assay signals that have ideal inter-relationships when the amplifier is operating as desired. The control scheme modifies the operation of the lineariser to account for any departures observed in the relationships.

    Abstract translation: 控制方案使用放大器(10)的输入和输出信号来控制在放大器(10)上操作的线性化器(24)。 当放大器根据需要进行操作时,感测输入和输出信号并用于开发具有理想相互关系的测定信号。 控制方案修改了线性关系器的操作,以解释在关系中观察到的任何偏差。

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