公开(公告)号：US20110201287A1

公开(公告)日：2011-08-18

申请号：US13120519

申请日：2008-09-24

申请人： Patrick Pratt ,  Jau Horng Chen ,  George Norris

发明人： Patrick Pratt ,  Jau Horng Chen ,  George Norris

IPC分类号： H01Q11/12

CPC分类号： H03F1/3247

摘要： A wireless communication unit comprises a transmitter having a forward path comprising a power amplifier, PA, and a feedback path arranged to feed back a portion of a signal output from the PA to a point in the forward path prior to the PA. The forward path and feedback path form a constant gain tracking (CGT) loop. The feedback path comprises an adaptive predistortion logic module located outside of the CGT loop and arranged to form an APD loop with the forward path and feedback path. The CGT loop comprises a controller logic module arranged to determine a gain offset of a signal routed through the forward path and feedback path and in response thereto set a drive level of the PA.

摘要翻译： 无线通信单元包括具有正向路径的发射机，该前向路径包括功率放大器PA和反馈路径，所述反馈路径被布置为将从PA输出的信号的一部分反馈到PA之前的前向路径中的一个点。 正向路径和反馈路径形成恒定增益跟踪（CGT）循环。 反馈路径包括位于CGT环路外部的自适应预失真逻辑模块，并被布置成与前向路径和反馈路径形成APD环路。 CGT循环包括控制器逻辑模块，其被布置为确定通过前向路径和反馈路径路由的信号的增益偏移，并响应于此设置PA的驱动电平。

公开(公告)号：US08433263B2

公开(公告)日：2013-04-30

申请号：US13120519

申请日：2008-09-24

申请人： Patrick Pratt ,  Jau Horng Chen ,  George Norris

发明人： Patrick Pratt ,  Jau Horng Chen ,  George Norris

IPC分类号： H04B1/04 ,  H01Q11/12

CPC分类号： H03F1/3247

摘要： A wireless communication unit comprises a transmitter having a forward path comprising a power amplifier, PA, and a feedback path arranged to feed back a portion of a signal output from the PA to a point in the forward path prior to the PA. The forward path and feedback path form a constant gain tracking (CGT) loop. The feedback path comprises an adaptive predistortion logic module located outside of the CGT loop and arranged to form an APD loop with the forward path and feedback path. The CGT loop comprises a controller logic module arranged to determine a gain offset of a signal routed through the forward path and feedback path and in response thereto set a drive level of the PA.

摘要翻译： 无线通信单元包括具有正向路径的发射机，该前向路径包括功率放大器PA和反馈路径，所述反馈路径被布置为将从PA输出的信号的一部分反馈到PA之前的前向路径中的一个点。 正向路径和反馈路径形成恒定增益跟踪（CGT）循环。 反馈路径包括位于CGT环路外部的自适应预失真逻辑模块，并被布置成与前向路径和反馈路径形成APD环路。 CGT循环包括控制器逻辑模块，其被布置为确定通过前向路径和反馈路径路由的信号的增益偏移，并响应于此设置PA的驱动电平。

公开(公告)号：US08068574B2

公开(公告)日：2011-11-29

申请号：US11755960

申请日：2007-05-31

申请人： George Norris ,  Joseph Staudinger ,  Jau-Horng Chen

发明人： George Norris ,  Joseph Staudinger ,  Jau-Horng Chen

IPC分类号： H04L7/00

CPC分类号： H03F1/3247 ,  H03F2201/3233

摘要： In an embodiment, a digital pre-distortion apparatus processes an input signal to produce a pre-distorted signal, and processes the pre-distorted signal to produce a feedback signal. The apparatus also rotates an adjustment gain by a gain rotation angle to produce a rotated adjustment gain, where the gain rotation angle is based on a phase difference between the input signal and the feedback signal. The apparatus also applies the rotated adjustment gain to the feedback signal, which may result in rotation of the feedback signal into a target phase region.

摘要翻译： 在一个实施例中，数字预失真设备处理输入信号以产生预失真信号，并处理预失真信号以产生反馈信号。 该装置还使调节增益旋转增益旋转角度以产生旋转的调节增益，其中增益旋转角度基于输入信号和反馈信号之间的相位差。 该装置还将旋转的调节增益应用于反馈信号，这可能导致反馈信号转动到目标相位区域。

公开(公告)号：US08463207B2

公开(公告)日：2013-06-11

申请号：US13058025

申请日：2008-08-20

申请人： Patrick Pratt ,  George Norris

发明人： Patrick Pratt ,  George Norris

IPC分类号： H04B1/04

CPC分类号： H03F1/3241 ,  H03F1/34

摘要： A wireless communication unit comprising a transmitter having a power amplifier, a controller logic module arranged to control a power control value of the power amplifier and a closed loop control system operably coupled to the power amplifier and arranged to monitor a level of peak PA compression, wherein in response to the identified level of peak PA compression the controller logic module is arranged to automatically adjust a power amplifier power control value of the PA to obtain a predetermined level of peak PA compression.

摘要翻译： 一种无线通信单元，包括具有功率放大器的发射机，被配置为控制功率放大器的功率控制值的控制器逻辑模块和可操作地耦合到功率放大器并被布置成监视峰值PA压缩水平的闭环控制系统， 其中响应于所识别的峰值PA压缩水平，控制器逻辑模块被布置成自动调整PA的功率放大器功率控制值以获得预定水平的峰值PA压缩。

公开(公告)号：US20110136452A1

公开(公告)日：2011-06-09

申请号：US13058025

申请日：2008-08-20

申请人： Patrick Pratt ,  George Norris

发明人： Patrick Pratt ,  George Norris

IPC分类号： H04B1/04 ,  H04W52/04

CPC分类号： H03F1/3241 ,  H03F1/34

摘要： A wireless communication unit comprising a transmitter having a power amplifier, a controller logic module arranged to control a power control value of the power amplifier and a closed loop control system operably coupled to the power amplifier and arranged to monitor a level of peak PA compression, wherein in response to the identified level of peak PA compression the controller logic module is arranged to automatically adjust a power amplifier power control value of the PA to obtain a predetermined level of peak PA compression.

摘要翻译： 一种无线通信单元，包括具有功率放大器的发射机，被配置为控制功率放大器的功率控制值的控制器逻辑模块和可操作地耦合到功率放大器并被布置成监视峰值PA压缩水平的闭环控制系统， 其中响应于所识别的峰值PA压缩水平，控制器逻辑模块被布置成自动调整PA的功率放大器功率控制值以获得预定水平的峰值PA压缩。

公开(公告)号：US20070026838A1

公开(公告)日：2007-02-01

申请号：US11191687

申请日：2005-07-27

申请人： Joseph Staudinger ,  Benjamin Gilsdorf ,  David Newman ,  George Norris ,  Gary Sadowniczak ,  Richard Sherman

发明人： Joseph Staudinger ,  Benjamin Gilsdorf ,  David Newman ,  George Norris ,  Gary Sadowniczak ,  Richard Sherman

IPC分类号： H04B1/16

CPC分类号： H04B1/0458 ,  H03F1/0205 ,  H03F1/0261 ,  H03F1/32 ,  H03F3/24 ,  H03F2200/105 ,  H03G3/3047 ,  H04B2001/0416

摘要： A radio frequency (“RF”) power amplifier circuit as described herein is configured to detect and measure an output load mismatch and to adjust the operating characteristics of the RF power amplifier to reduce output signal distortion. The circuit includes a directional RF signal coupler that obtains a coupled reflected RF signal that is indicative of the output load mismatch. The coupled reflected RF signal is processed to generate one or more bias control signals for the RF power amplifier. In operation, a mismatch condition will result in a measurable coupled reflected RF signal and a corresponding reduction in output power from the RF power amplifier. Ultimately, the output power control mechanism strives to maintain the RF power amplifier within a linear operating range.

摘要翻译： 如本文所述的射频（“RF”）功率放大器电路被配置为检测和测量输出负载失配并且调整RF功率放大器的工作特性以减小输出信号失真。 该电路包括定向RF信号耦合器，其获得指示输出负载不匹配的耦合的反射RF信号。 处理耦合的反射RF信号以产生用于RF功率放大器的一个或多个偏置控制信号。 在操作中，不匹配条件将导致可测量的耦合反射RF信号和来自RF功率放大器的输出功率的相应降低。 最终，输出功率控制机制致力于将RF功率放大器维持在线性工作范围内。

公开(公告)号：US20070109055A1

公开(公告)日：2007-05-17

申请号：US11282734

申请日：2005-11-17

申请人： George Norris ,  Benjamin Gilsdorf ,  David Newman

发明人： George Norris ,  Benjamin Gilsdorf ,  David Newman

IPC分类号： H03F1/52

CPC分类号： H03F3/24 ,  H03F1/0205 ,  H03F1/32 ,  H03F3/189 ,  H03F2200/78

摘要： A soft saturation detection circuit for a radio frequency (“RF”) power amplifier is configured to detect the onset of soft saturation in an unambiguous and accurate manner. The circuit compares the time derivative of a voltage signal indicative of the RF output power to the time derivative of a control voltage signal for the RF power amplifier. The circuit also employs a gating mechanism that ensures that a soft saturation indication signal is generated under appropriate operating conditions.

摘要翻译： 用于射频（“RF”）功率放大器的软饱和度检测电路被配置为以明确和准确的方式检测软饱和的开始。 电路将指示RF输出功率的电压信号的时间导数与RF功率放大器的控制电压信号的时间导数进行比较。 电路还采用门控机构，确保在适当的工作条件下产生软饱和指示信号。