公开(公告)号：US07301397B2

公开(公告)日：2007-11-27

申请号：US11372513

申请日：2006-03-10

申请人： Ezmarai Arbab ,  Mark Gurvich ,  Matthew J. Hunton ,  Alexander Rabinovich ,  Bill Vassilakis

发明人： Ezmarai Arbab ,  Mark Gurvich ,  Matthew J. Hunton ,  Alexander Rabinovich ,  Bill Vassilakis

IPC分类号： H03F1/00

CPC分类号： H03F1/32 ,  H03F1/3223 ,  H03F1/3229 ,  H03F1/3235 ,  H03F2200/204 ,  H03F2200/321 ,  H03F2201/3212

摘要： A delay mismatched feed forward power amplifier is disclosed. Loop 1 includes a main amplifier and is used to derive a carrier cancelled sample of the main amplifier output. Loop 2 includes an error amplifier used to amplify the carrier cancelled signal derived from Loop 1 operation in order to cancel distortion products generated due to the nonlinear nature of the main amplifier. Loop 2 also utilizes a very short Loop 2 delay line. A significant efficiency gain is provided due to reduced output power losses associated with the Loop 2 delay line. Lower output losses also results in lower distortion levels produced by the main amplifier. This, in turn, reduces the size and performance requirements placed on the error amplifier. A smaller and more efficient error amplifier is employed resulting in further amplifier system efficiency improvement. The delay mismatch is compensated by a third control loop, a special adaptive control algorithm or a combination thereof.

摘要翻译： 公开了延迟失配的前馈功率放大器。 环路1包括主放大器，用于导出主放大器输出的载波消除采样。 环路2包括用于放大从环路1操作导出的载波消除信号的误差放大器，以便消除由于主放大器的非线性特性而产生的失真产物。 环路2也采用非常短的Loop2延迟线。 由于与环路2延迟线相关联的降低的输出功率损耗，提供了显着的效率增益。 较低的输出损耗也导致主放大器产生的失真水平较低。 这反过来又降低了放在误差放大器上的尺寸和性能要求。 使用更小且更有效的误差放大器导致进一步的放大器系统效率改进。 延迟失配由第三控制回路，特殊自适应控制算法或其组合补偿。

公开(公告)号：US07194039B2

公开(公告)日：2007-03-20

申请号：US10200240

申请日：2002-07-22

申请人： Matthew J. Hunton

发明人： Matthew J. Hunton

IPC分类号： H04K1/10 ,  H04K1/02 ,  H04L27/28

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。

公开(公告)号：US06449302B2

公开(公告)日：2002-09-10

申请号：US09746167

申请日：2000-12-22

申请人： Matthew J. Hunton

发明人： Matthew J. Hunton

IPC分类号： H04L2730

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.

摘要翻译： 一种包括用于限制从系统发送的符号的信号带宽的滤波器的类型的扩频通信系统中的信号峰值降低的系统和方法。 在包括通过使用对应于滤波器脉冲响应函数的滤波器系数值来预测滤波器对输入符号的影响的滤波器预测器的滤波器之前提供信号峰值降低单元。 调整预测使输出信号超过规定的峰值极限值的输入符号。 公开了用于计算要应用于输入符号的必要峰值减小的适当算法的几个示例。 峰值降低单元为滤波器提供经调整的符号，用于处理和通信系统输出。