公开(公告)号：US08379699B2

公开(公告)日：2013-02-19

申请号：US13046107

申请日：2011-03-11

Applicant: Russell Smiley

Inventor： Russell Smiley

IPC: H04B1/38

CPC classification number: H04B1/7097 ,  H03F1/3235

Abstract: Interference-reducing circuits include a feed-forward circuit for subtracting all or part of a desired transmitter-signal component from a signal coupled from the power amplifier's output path. The error signal from this feed-forward circuit contains a replica of distortion in the power amplifier output. A cancellation loop adjusts the phase and/or amplitude of this error signal and combines this adjusted error signal with an interference-carrying signal, removing some of the undesired distortion. A spread-spectrum pilot signal is used in one or both loops, to provide a reference signal that can be monitored by an adjustment circuit, which measures the magnitude and/or phase of a spread-spectrum signal that is injected into the interference-carrying signal and, based on that measurement, adjusts the amplitude, phase, and/or delay of the cancellation signal that is added to the interference-carrying signal. This yields a reduced-interference signal in which undesired distortion is reduced.

Abstract translation: 干扰减少电路包括用于从功率放大器的输出路径耦合的信号中减去所有或部分所需发射机信号分量的前馈电路。 来自该前馈电路的误差信号包含功率放大器输出中的失真复制品。 消除环路调整该误差信号的相位和/或振幅，并将该调整后的误差信号与干扰承载信号相组合，从而消除一些不需要的失真。 在一个或两个环路中使用扩频导频信号，以提供可由调节电路监视的参考信号，该调整电路测量被注入到干扰载波中的扩频信号的幅度和/或相位 信号，并且基于该测量，调整附加到干扰承载信号的抵消信号的幅度，相位和/或延迟。 这产生了减少干扰信号，其中不期望的失真被减少。

公开(公告)号：US08103225B2

公开(公告)日：2012-01-24

申请号：US12160980

申请日：2008-05-02

Applicant: Alan David Couchman ,  Daryl Richard Jones

Inventor： Alan David Couchman ,  Daryl Richard Jones

IPC: H04B7/185 ,  H04B1/00 ,  H04B7/00 ,  H04Q11/12

CPC classification number: H03F3/602 ,  H03F1/0205 ,  H03F1/3235 ,  H03F1/3247 ,  H03F1/3282 ,  H03F1/345 ,  H03F3/68 ,  H03F2200/105 ,  H03F2200/192 ,  H03F2200/204 ,  H03F2200/451 ,  H03F2201/3212 ,  H03F2201/3218

Abstract: Feedback loops are used within a Multiport Amplifier (MPA) of a communications satellite to maintain phase and amplitude tracking and hence isolation and combining performance. at Ku and Ka-bands, for which there is increasing interest in MPA applications, and where wavelengths are short and maintenance of phase/amplitude tracking becomes highly challenging. Feedback loops are located at strategic points within the MPA Output Network (ONET) to detect tracking errors and provide compensation. Errors are detected through power measurements at “null points”, with zero power corresponding to accurate tracking. The feedback loops adjust the MPA phase/gains such that the levels at these points are maintained at zero. The scheme operates with a pilot signal for measurement of nulls, injected at one of the MPA inputs.

Abstract translation: 在通信卫星的多端口放大器（MPA）中使用反馈回路，以保持相位和幅度跟踪，从而保持隔离和组合性能。 在Ku和Ka波段，对于MPA应用越来越感兴趣，波长短，并且相位/幅度跟踪的维护变得非常具有挑战性。 反馈回路位于MPA输出网络（ONET）内的战略点，以检测跟踪误差并提供补偿。 通过在“零点”处的功率测量检测到错误，零功率对应于精确跟踪。 反馈回路调整MPA相位/增益，使得这些点处的电平保持在零。 该方案使用用于测量零点的导频信号进行操作，在MPA输入之一处注入。

公开(公告)号：US20080055000A1

公开(公告)日：2008-03-06

申请号：US10556395

申请日：2004-05-18

Applicant: Ryoki Haramoto ,  Junya Dosaka

Inventor： Ryoki Haramoto ,  Junya Dosaka

IPC: H03F1/14 ,  H03F1/26

CPC classification number: H03F1/3235 ,  H03F1/3229 ,  H03F3/72 ,  H03F2200/195 ,  H03F2200/207 ,  H03F2200/507 ,  H03F2203/7227

Abstract: An amplification apparatus that has a distortion detection loop that detects distortion components contained in an amplified signal to be amplified that is amplified by an amplifier 3, and a distortion removal loop that removes distortion components from the amplified signal, using the distortion components detected by the distortion detection loop, combines a reference signal (pilot signal) with the signal to be amplified, and performs control relating to distortion compensation, using said reference signal, to provide improved efficiency with respect to a configuration to perform control relating to distortion compensation, using a reference signal. A signal to be amplified is detected by amplification signal detection means 11˜13 and 21, and when it is detected by the amplification signal detection means that there is no input of a signal to be amplified, reference signal control means 21, 15 perform control to effect non-output of the reference signals.

Abstract translation: 具有失真检测环路的放大装置，其检测由放大器3放大的放大放大信号中包含的失真成分，以及使用由放大器3检测出的失真成分从放大信号中除去失真成分的失真消除环路 失真检测环路将参考信号（导频信号）与要放大的信号组合起来，使用所述参考信号执行与失真补偿相关的控制，以提供关于执行与失真补偿相关的控制的配置的改进的效率，使用 参考信号。 放大信号检测装置11〜13和21检测要被放大的信号，当放大信号检测装置检测到没有要放大的信号的输入时，基准信号控制装置21,15进行控制 以实现参考信号的非输出。

公开(公告)号：US07157967B2

公开(公告)日：2007-01-02

申请号：US11018216

申请日：2004-12-21

Applicant: Richard Neil Braithwaite

Inventor： Richard Neil Braithwaite

IPC: H03F1/00

CPC classification number: H03F1/3235

Abstract: A fast search algorithm for loop alignment of a feed forward amplifier is disclosed. The algorithm controls a processor that adjusts, digitally, the gain and phase of the loop alignment based on power measurements at the input and output of cancellation combiners, to find the optimal setting. A “non-collinear descent” algorithm is used to search, iteratively, for the minimum within an error surface. For loop alignment, the error surface is defined by the set of measurement points comprising the alignment settings and the associated cancellation residuals. For the case of first loop alignment, the cancellation residual is measured using the ratio of two power detectors located at the input and after the cancellation (error) combiner. For second loop alignment, cancellation is estimated using the residual pilot power detected at the output of the amplifier. The preferred alignment method uses three successive measurements to estimate the gradient direction with respect to gain and phase shifter settings. The actual descent direction is selected to be close to the gradient direction without being collinear with the most recent alignment adjustments. Quantization of the descent direction simplifies the implementation as well as the enforcement of the non-collinearity constraint on successive alignment settings. Two different step size selection approaches are disclosed, however, any standard step size selection approach may be employed.

Abstract translation: 公开了一种用于前馈放大器的循环对准的快速搜索算法。 该算法控制一个处理器，可以根据消除组合器的输入和输出功率测量数字地调整环路对准的增益和相位，以找到最佳设置。 使用“非共线下降”算法迭代地搜索误差表面内的最小值。 对于循环对准，误差表面由包括对准设置和相关联的取消残差的测量点集合定义。 对于第一循环对准的情况，使用位于输入端和取消（错误）组合器之后的两个功率检测器的比率来测量抵消残差。 对于第二环路对准，使用在放大器的输出处检测到的残留导频功率来估计抵消。 优选的对准方法使用三个连续的测量来估计关于增益和移相器设置的梯度方向。 选择实际下降方向接近梯度方向，而不与最近的对准调整共线。 下降方向的量化简化了实现以及对连续对齐设置的非共线性约束的执行。 公开了两种不同的步长选择方法，然而，可以采用任何标准步长选择方法。

公开(公告)号：US20060222104A1

公开(公告)日：2006-10-05

申请号：US11392170

申请日：2006-03-29

Applicant: Richard Braithwaite

Inventor： Richard Braithwaite

IPC: H04L25/49

CPC classification number: H03F1/3235 ,  H03F1/3241 ,  H03F2200/198 ,  H03F2201/3212 ,  H03F2201/3215

Abstract: A pilot system and method is disclosed that increases the rate of convergence of the second loop alignment control in a feed forward amplifier. Both a pilot generation and detection system and search algorithm controlling the alignment are disclosed. By measuring the frequency of the generated pilot, phase information regarding the second loop cancellation transfer function can be inferred. Changes in the pilot frequency as the search algorithm makes steps in the second loop alignment indicate errors in the direction of the search. Using this pilot frequency measurement along with the existing log-power measurement of the residual pilot power improves the convergence speed because fewer steps will be made to reach the optimal alignment setting.

Abstract translation: 公开了一种提高前馈放大器中的第二环路对准控制的收敛速度的导频系统和方法。 公开了控制对准的导频生成和检测系统和搜索算法。 通过测量产生的导频的频率，可以推断出关于第二循环消除传递函数的相位信息。 搜索算法使第二循环对齐中的步骤的导频频率的变化表示搜索方向上的错误。 使用该导频测量以及剩余导频功率的现有对数功率测量提高了收敛速度，因为将达到最佳对准设置的步骤较少。

公开(公告)号：US06838934B2

公开(公告)日：2005-01-04

申请号：US10287681

申请日：2002-11-05

Applicant: Yasunori Suzuki ,  Toshio Nojima

Inventor： Yasunori Suzuki ,  Toshio Nojima

IPC: H03F1/32 ,  H03F3/66 ,  H03F1/26

CPC classification number: H03F1/3235 ,  H03F2201/3218

Abstract: In a feedforward amplifier with a dual loop in which a distortion injection path of a distortion elimination circuit 50 is provided as a feedforward configuration composed of a first auxiliary amplifier distortion elimination circuit 60 and a first auxiliary amplifier distortion elimination circuit, a second variable attenuator 55 and a second variable phase shifter 56 are provided preceding the distortion detection circuit 60, a second pilot signal injected between stages of a main amplifier 14 is detected by a directional coupler 85, and the second variable attenuator 55 and the second variable phase shifter 56 are controlled by a second controller 97 to minimize the level of the detected second pilot signal, thereby bringing the distortion elimination circuit and the first auxiliary distortion detection circuit into balance at the same time.

Abstract translation: 在具有双回路的前馈放大器中，其中提供失真消除电路50的失真注入路径作为由第一辅助放大器失真电路60和第一辅助放大器失真电路组成的前馈配置，第二可变衰减器55 并且在失真检测电路60之前提供第二可变移相器56，通过定向耦合器85检测在主放大器14的级之间注入的第二导频信号，并且第二可变衰减器55和第二可变移相器56是 由第二控制器97控制，以使检测到的第二导频信号的电平最小化，从而使失真消除电路和第一辅助失真检测电路同时平衡。

公开(公告)号：US06734727B2

公开(公告)日：2004-05-11

申请号：US10225222

申请日：2002-08-21

Applicant: Kaoru Ishida ,  Naoki Takachi ,  Yuji Saito

Inventor： Kaoru Ishida ,  Naoki Takachi ,  Yuji Saito

IPC: H03F366

CPC classification number: H03F1/3229 ,  H03F1/3235 ,  H03F2201/3212

Abstract: A feedforward amplifier includes a main amplifier for amplifying an input signal, a control circuit for generating a predetermined pilot signal based on the output of a local oscillator and a frequency divider included in the control circuit, and a coupler for combining the input signal or the amplified signal with the pilot signal to generate a combined signal. A first coupler and a second coupler are provided for extracting any distortion component from the combined signal. A vector adjuster, an error amplifier, and a third coupler are provided for removing the extracted distortion component from the combined signal to generate an output signal. An orthogonal detector is provided for using any one of the pilot signal, or the output of the local oscillator, the frequency divider, and the combination of the vector adjuster, error amplifier, and the third coupler to make an adjustment for removing the distortion component.

Abstract translation: 前馈放大器包括用于放大输入信号的主放大器，用于基于本地振荡器的输出和包括在控制电路中的分频器产生预定导频信号的控制电路，以及用于将输入信号或 放大信号与导频信号产生组合信号。 提供第一耦合器和第二耦合器用于从组合信号中提取任何失真分量。 提供矢量调节器，误差放大器和第三耦合器，用于从组合信号中去除提取的失真分量以产生输出信号。 提供正交检测器，用于使用导频信号，本地振荡器的输出，分频器以及矢量调节器，误差放大器和第三耦合器的组合中的任何一个来进行调整以去除失真分量 。

公开(公告)号：US06727751B2

公开(公告)日：2004-04-27

申请号：US10246524

申请日：2002-09-19

Applicant: Hiroichi Yonenaga ,  Kiyoshi Funada ,  Kotaro Takenaga

Inventor： Hiroichi Yonenaga ,  Kiyoshi Funada ,  Kotaro Takenaga

IPC: H03F100

CPC classification number: H03F1/3235

Abstract: A distortion compensation amplifier has a distortion detection loop that divides an input signal, amplifies one divided signal with an amplifier and uses the amplified signal and another divided signal to detect a distortion component generated and introduced into the amplified signal in the amplifier. The amplifier additionally has a distortion removal loop that removes the detected distortion component from the amplified signal produced by the amplifier. The distortion detection loop comprises a filter for reducing the distortion component of the amplified signal output by the amplifier that was generated and introduced into the amplified signal in the amplifier and detects the distortion component reduced by the filter. The distortion removal loop removes from the amplified signal the detected distortion component that was produced by the amplifier and reduced by the filter.

Abstract translation: 失真补偿放大器具有对输入信号进行分频的失真检测环路，用放大器放大一个分频信号，并使用放大信号和另一分频信号来检测在放大器中产生并被引入到放大信号中的失真分量。 放大器还具有失真去除环路，其从由放大器产生的放大信号中去除检测到的失真分量。 失真检测环路包括滤波器，用于减小由放大器输出的放大信号的失真分量，该放大信号被产生并被引入放大器中的放大信号，并检测由滤波器减小的失真分量。 失真消除环路从放大信号中去除由放大器产生的并被滤波器减小的检测到的失真分量。

公开(公告)号：US06677817B2

公开(公告)日：2004-01-13

申请号：US10023343

申请日：2001-12-17

Applicant: Richard Posner

Inventor： Richard Posner

IPC: H03F366

CPC classification number: H03F1/3235 ,  H03F1/52 ,  H03F3/211 ,  H03F3/72

Abstract: An RF power amplifier with amplifier stage failure detection comprises an amplifier input for receiving an RF signal to be amplified, an amplifier output for outputting an amplified RF signal, a plurality of separate amplifier stages coupled between the amplifier input and amplifier output so as to cumulatively provide a desired amplifier gain to the input RF signal, and means for detecting amplifier stage failure by providing a pilot tone separately to the amplifier stages based on a separate timing for each stage and detecting pilot tones output from the stages based on the timing.

Abstract translation: 具有放大器级故障检测的RF功率放大器包括用于接收待放大的RF信号的放大器输入端，用于输出放大的RF信号的放大器输出端，耦合在放大器输入端和放大器输出端之间的多个单独的放大器级，以便累加 为输入RF信号提供期望的放大器增益，以及用于基于每个级的单独定时向放大器级单独提供导频音来检测放大器级故障的装置，并且基于该定时检测从该级输出的导频音。

公开(公告)号：US06566945B2

公开(公告)日：2003-05-20

申请号：US10030102

申请日：2002-01-17

Applicant: Masatoshi Nakayama ,  Kenichi Horiguchi ,  Yuji Sakai ,  Yukio Ikeda ,  Kazuyuki Totani ,  Satoshi Kunugi ,  Haruyasu Senda

Inventor： Masatoshi Nakayama ,  Kenichi Horiguchi ,  Yuji Sakai ,  Yukio Ikeda ,  Kazuyuki Totani ,  Satoshi Kunugi ,  Haruyasu Senda

IPC: H03F366

CPC classification number: H03F1/3235 ,  H03F2201/3212 ,  H03F2201/3218

Abstract: A feedforward amplifier combines an input signal combined by a first error rejection loop with an error component and a first pilot signal detected by a second error detection loop, thereby canceling out the error component and the first pilot signal residual in the input signal.