公开(公告)号：US07769103B2

公开(公告)日：2010-08-03

申请号：US11520216

申请日：2006-09-13

申请人： Scott Carichner ,  Richard Neil Braithwaite ,  Nikolai Maslennikov ,  Matthew J. Hunton

发明人： Scott Carichner ,  Richard Neil Braithwaite ,  Nikolai Maslennikov ,  Matthew J. Hunton

IPC分类号： H04L25/49

CPC分类号： H03F1/3294 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/3258 ,  H03F2200/102 ,  H03F2200/216 ,  H04L27/364 ,  H04L27/368

摘要： A predistortion linearized amplifier system that uses analog polynomial based predistortion is disclosed. An analog polynomial function generator receives polynomial parameter updates from a polynomial parameter generator. The polynomial parameter generator uses a combination of analog and digital signal processing to create the parameter updates. This processing is performed on input signal amplitude, detected using analog circuits, and RF coupled samples of the input signal, and the output signal. By using a combination of analog and digital signal processing means, digital processing can be performed at sub-Nyquist rates, significantly reducing the cost of digital circuits. Also, since the predistortion modulation signal is created with an analog function generator, time correlating delay is minimized reducing circuit costs.

摘要翻译： 公开了一种使用模拟多项式的预失真的预失真线性放大器系统。 模拟多项式函数发生器从多项式参数发生器接收多项式参数更新。 多项式参数发生器使用模拟和数字信号处理的组合来创建参数更新。 对使用模拟电路检测的输入信号幅度和输入信号的RF耦合样本以及输出信号进行该处理。 通过使用模拟和数字信号处理装置的组合，可以以次奈奎斯特速率进行数字处理，显着降低数字电路的成本。 此外，由于预失真调制信号是用模拟函数发生器产生的，所以时间相关延迟最小化降低了电路成本。

公开(公告)号：US07187232B2

公开(公告)日：2007-03-06

申请号：US11369529

申请日：2006-03-07

申请人： Richard Neil Braithwaite ,  Matthew J. Hunton

发明人： Richard Neil Braithwaite ,  Matthew J. Hunton

IPC分类号： H03F3/66

CPC分类号： H03F1/26 ,  H03F1/3235

摘要： A feed forward amplifier and method of amplification are disclosed. The amplifier output is used to generate a pilot signal via feedback using uncancelled noise in the amplifier output. An automatic level control circuit maintains the pilot signal at a substantially constant level when the detected uncancelled noise in the amplifier output is above a threshold level. The generated pilot signal strength is allowed to vary when the detected uncancelled noise in the amplifier output is below the threshold and disappears automatically when the amplifier is aligned.

摘要翻译： 公开了一种前馈放大器和放大方法。 放大器输出用于通过放大器输出中未经检测的噪声的反馈来产生导频信号。 当放大器输出中检测到的未经取消的噪声高于阈值电平时，自动电平控制电路将导频信号保持在基本恒定的电平。 当放大器输出中检测到的未经取消的噪声低于阈值时，产生的导频信号强度会发生变化，当放大器对齐时自动消失。

公开(公告)号：US07126418B2

公开(公告)日：2006-10-24

申请号：US11288580

申请日：2005-11-29

申请人： Matthew J. Hunton ,  Richard Neil Braithwaite

发明人： Matthew J. Hunton ,  Richard Neil Braithwaite

IPC分类号： H03F3/66

CPC分类号： H03F1/26 ,  H03F1/3235

摘要： A delay mismatched feed forward amplifier system employing a control system and method using floors and penalties is disclosed. The disclosed control system and method allows the second loop phase adjuster setting to be offset in a repeatable and controlled manner. Applying floors and penalties to offset the steady-state phase adjuster setting modifies the conventional pilot cancellation approach. In the conventional case, pilot cancellation has a distinct minimum that corresponds to the desired adjustment setting. In the disclosed approach, the measured pilot cancellation is clipped to a lower bound or floor to produce a set of equal valued minimum control results. The floor is selected to place a desired phase offset to the phase adjuster at the edge of minimum floor. To ensure that the correct phase adjuster offset is selected from the set of equal valued minimum control results, a control direction based penalty is added. By including both the floor and penalty, the phase adjuster steady state offset will be controlled to the edge of the minimum floor.

公开(公告)号：US06998916B2

公开(公告)日：2006-02-14

申请号：US10733087

申请日：2003-12-11

申请人： Matthew J. Hunton ,  Richard Neil Braithwaite

发明人： Matthew J. Hunton ,  Richard Neil Braithwaite

IPC分类号： H03F1/26 ,  H03F3/66

CPC分类号： H03F1/26 ,  H03F1/3235

摘要： A feed forward amplifier employing a new adaptive controller and method is disclosed. The controller aligns both a gain adjuster and phase adjuster of a first cancellation loop. The phase adjuster may be controlled following a standard approach. However, the gain adjuster is offset intentionally causing an incomplete cancellation, increasing the signal power passing through the error amplifier. If the gain adjuster is offset low, below the gain adjustment required to maximize carrier cancellation, peak power output from the main amplifier is reduced while the second loop maintains constant system output power. If the gain adjuster is offset high, peak power output from the error amplifier is reduced while the second loop maintains constant system output power. By controlling the gain adjuster offset from full first loop cancellation, the feed forward amplifier can be optimized for the power handling capabilities of the main and error amplifiers. A system and method of specifying and controlling the steady-state offset of the first loop gain adjuster is also disclosed. By altering the cost function of the first loop gain, the desired gain adjuster offset becomes the steady-state adjustment. Floors and penalties are incorporated into the first loop gain minimization approach to allow precise specification of the gain adjuster offset. The gain adjuster offset can be controlled at will to optimize the feed forward system even when the operating conditions or goals are varying.

摘要翻译： 公开了采用新的自适应控制器和方法的前馈放大器。 控制器对准第一消除环路的增益调节器和相位调节器。 相位调节器可以按照标准方法进行控制。 然而，增益调整器有意地偏移导致不完全的取消，增加通过误差放大器的信号功率。 如果增益调节器偏移为低电平，低于最大化载波消除所需的增益调整，则主放大器的峰值功率输出减少，而第二个环路保持恒定的系统输出功率。 如果增益调节器偏移高，则从误差放大器输出的峰值功率减小，而第二个回路保持恒定的系统输出功率。 通过控制增益调节器偏离完全第一回路消除，前馈放大器可以针对主和误差放大器的功率处理能力进行优化。 还公开了一种用于指定和控制第一环路增益调节器的稳态偏移的系统和方法。 通过改变第一回路增益的成本函数，期望的增益调整器偏移成为稳态调整。 地面和罚款被纳入第一个环路增益最小化方法，以允许精确规定增益调整器偏移量。 增益调节器偏移可以随意控制，以优化前馈系统，即使操作条件或目标不同。

公开(公告)号：US07002407B2

公开(公告)日：2006-02-21

申请号：US10733498

申请日：2003-12-11

申请人： Matthew J. Hunton ,  Richard Neil Braithwaite

发明人： Matthew J. Hunton ,  Richard Neil Braithwaite

IPC分类号： H03F3/66 ,  H03F1/26

CPC分类号： H03F1/26 ,  H03F1/3235

摘要： A delay mismatched feed forward amplifier system employing a control system and method using floors and penalties is disclosed. The disclosed control system and method allows the second loop phase adjuster setting to be offset in a repeatable and controlled manner. Applying floors and penalties to offset the steady-state phase adjuster setting modifies the conventional pilot cancellation approach. In the conventional case, pilot cancellation has a distinct minimum that corresponds to the desired adjustment setting. In the disclosed approach, the measured pilot cancellation is clipped to a lower bound or floor to produce a set of equal valued minimum control results. The floor is selected to place a desired phase offset to the phase adjuster at the edge of minimum floor. To ensure that the correct phase adjuster offset is selected from the set of equal valued minimum control results, a control direction based penalty is added. By including both the floor and penalty, the phase adjuster steady state offset will be controlled to the edge of the minimum floor.

摘要翻译： 公开了采用控制系统的延迟失配的前馈放大器系统和使用楼层和罚款的方法。 所公开的控制系统和方法允许以可重复和受控的方式偏移第二回路相位调节器设置。 应用楼层和罚款以抵消稳态相位调整器设置，修改了常规的先导取消方法。 在常规情况下，导频消除具有对应于期望的调整设置的明显的最小值。 在所公开的方法中，测量的导频消除被剪切到下限或下限以产生一组等价的最小控制结果。 选择地板以在相位调整器的最小楼层边缘放置期望的相位偏移。 为了确保从等值最小控制结果的集合中选择正确的相位调整器偏移，增加了基于控制方向的惩罚。 通过包括地板和罚款，相位调整器稳态偏移将被控制在最小楼层的边缘。

公开(公告)号：US07170952B2

公开(公告)日：2007-01-30

申请号：US10102493

申请日：2002-03-20

申请人： Matthew J. Hunton

发明人： Matthew J. Hunton

IPC分类号： H04L27/04 ,  H04L25/03 ,  H04B1/69

CPC分类号： H04B1/707 ,  H04B2201/70706 ,  H04L27/2614

摘要： A system and method for post filtering signal peak reduction adapted for use in a communication system incorporating a source of a communication signal band limited in a manner corresponding to a spectral band to which the communication system is limited. A first signal path receives as an input the band limited communication signal. A second parallel signal path includes a peak reduction calculation unit for calculating a peak reduction correction signal and a filter providing a filtering operation on the peak reduction correction signal corresponding to the spectral band to which the communication system is limited. The filtered peak reduction correction signal and delayed input signal are combined to provide peak adjusted output signals without violating the band limits of the communication signal or the modulation scheme of the communication signal.

摘要翻译： 一种用于后置滤波信号峰值降低的系统和方法，其适用于结合通信信号源的通信系统的通信系统，该通信信号频带的源以对应于通信系统所限制的频谱带的方式被限制。 第一信号路径接收带限通信信号作为输入。 第二并行信号路径包括用于计算峰值减小校正信号的峰值减少计算单元和对与通信系统所限制的频谱带相对应的峰值减小校正信号提供滤波操作的滤波器。 经滤波的峰值减小校正信号和延迟输入信号被组合以提供峰值调整的输出信号，而不违反通信信号的频带限制或通信信号的调制方案。

公开(公告)号：US07095798B2

公开(公告)日：2006-08-22

申请号：US10127164

申请日：2002-04-22

申请人： Matthew J. Hunton

发明人： Matthew J. Hunton

IPC分类号： H04L25/03 ,  H03C3/02

CPC分类号： H04L27/2614

摘要： A system and method for post filtering signal peak reduction adapted for use in a multi-carrier communication system incorporating a source of a multi-carrier communication signal band limited in plural bands corresponding to the plural carriers. A first signal path receives as an input the band limited multi-carrier communication signal. A second parallel signal path includes a peak reduction calculation circuit for calculating a peak reduction correction signal and a plurality of filters providing a plurality of parallel filtering operations on the peak reduction correction signal corresponding to the plural bands to which the communication system is limited. The filtered peak reduction correction signals and delayed input signal are combined to provide peak adjusted output signals without violating the band limits of the communication signal or the modulation scheme of the communication signal.

公开(公告)号：US07003017B2

公开(公告)日：2006-02-21

申请号：US10200399

申请日：2002-07-22

申请人： Matthew J. Hunton

发明人： Matthew J. Hunton

IPC分类号： H04B1/707

CPC分类号： H04L25/03343 ,  H04B1/707 ,  H04B2201/70706 ,  H04L27/2614 ,  H04L27/2621 ,  H04L27/366

摘要： A system and method for signal peak reduction in a spread spectrum communication system of the type including a filter for limiting signal bandwidth of symbols transmitted from the system. A signal peak reduction unit is provided before the filter that includes a filter predictor that predicts the effect of the filter on input symbols by using filter coefficient values corresponding to the filter impulse response function. Input symbols that are predicted to cause the output signal to exceed a predetermined peak limit value are adjusted. Several examples of suitable algorithms for calculating the necessary peak reduction to be applied to the input symbols are disclosed. The peak reduction unit provides adjusted symbols to the filter for processing and communication system output.

公开(公告)号：US07864874B2

公开(公告)日：2011-01-04

申请号：US11521028

申请日：2006-09-14

申请人： Matthew J. Hunton

发明人： Matthew J. Hunton

IPC分类号： H04L27/28

CPC分类号： H04L27/2624

摘要： A system and method for providing a peak power reduced OFDM communications signal are disclosed. The system and method provide peak reduction processing in the time domain followed by inter-symbol interference (ISI) control processing in the frequency domain to maintain modulation errors introduced by the peak reduction processing to an acceptable level. The processing is preferably done on a parallel signal path and the peak corrections with ISI control are added into the main signal path to provide the peak reduced OFDM signal.

摘要翻译： 公开了一种用于提供峰值功率降低的OFDM通信信号的系统和方法。 该系统和方法在时域中提供峰值缩减处理，随后在频域中进行符号间干扰（ISI）控制处理，以将由峰值缩小处理引入的调制误差维持在可接受的水平。 该处理优选地在并行信号路径上进行，并且将具有ISI控制的峰值校正添加到主信号路径中以提供峰值降低的OFDM信号。

公开(公告)号：US06449303B2

公开(公告)日：2002-09-10

申请号：US09884302

申请日：2001-06-19

申请人： Matthew J. Hunton

发明人： Matthew J. Hunton

IPC分类号： H04L2730

CPC分类号： H04L27/366 ,  H04B2201/70706 ,  H04L25/03343 ,  H04L27/2614 ,  H04L27/2621 ,  H04L27/2637

摘要： A system and method for signal peak reduction in a multiple carrier communication system where the individual carriers are produced from input symbols that are filtered to reduce individual carrier bandwidths, offset in frequency, and combined into an output signal. A multiple carrier peak reduction unit is provided which modifies the input carrier symbols so that the combined output signal does not exceed a predetermined peak limit value. The multiple carrier peak reduction unit includes filter predictors that predict the effect of each channel filter on that carriers input symbols by using filter coefficient values corresponding to the impulse response function of each filter. The filter predictor outputs are then phase shifted, in correspondence to frequency offsets provided for in multiple carrier signal generation, and combined to produce a prediction of the combined signal output which is then processed to determine the corrections required to the individual channel symbol inputs.

摘要翻译： 一种用于多载波通信系统中的信号峰值降低的系统和方法，其中各个载波从被滤波以减少单个载波带宽，频率偏移并组合成输出信号的输入符号产生。 提供一种多载波峰值降低单元，其对输入载波符号进行修改，使得组合的输出信号不超过预定的峰值极限值。 多载波峰值降低单元包括通过使用对应于每个滤波器的脉冲响应函数的滤波器系数值来预测每个信道滤波器对载波输入符号的影响的滤波器预测器。 然后，滤波器预测器输出对应于在多载波信号生成中提供的频率偏移量相移，并且被组合以产生组合信号输出的预测，然后对其进行处理以确定各个信道符号输入所需的校正。