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1.发明授权公开(公告)号：US08320868B2
公开(公告)日：2012-11-27
申请号：US12704484
申请日：2010-02-11
申请人： Patrick Pratt , William Plumb , Sophie Gault , Pei-Shiun Chung
发明人： Patrick Pratt , William Plumb , Sophie Gault , Pei-Shiun Chung
CPC分类号： H04B1/525
摘要： A wireless communication unit includes a transmitter for processing a baseband transmit signal to produce a first radio frequency signal. A receiver is arranged to convert a second radio frequency signal to a baseband receive signal, where the receiver has a summation module arranged to add a cancellation signal to the baseband receive signal. A selectivity element is arranged to couple the transmitter and the receiver to an antenna, where a reduced portion of the first radio frequency signal is introduced into the second radio frequency signal thereby creating a second order inter-modulation distortion component in the baseband receive signal. An adaptive estimator module has a filter for filtering the baseband receive signal to remove dc offsets associated with the second order inter-modulation distortion component and generate the cancellation signal based on the baseband transmit signal and the filtered baseband receive signal for inputting to the summation module.
摘要翻译： 无线通信单元包括用于处理基带发射信号以产生第一射频信号的发射机。 接收器被布置为将第二射频信号转换为基带接收信号，其中接收器具有被设置为将相消号信号加到基带接收信号上的求和模块。 布置选择性元件以将发射器和接收器耦合到天线，其中第一射频信号的减少的部分被引入到第二射频信号中，从而在基带接收信号中产生二阶互调失真分量。 自适应估计器模块具有用于对基带接收信号进行滤波以去除与二阶互调失真分量相关联的直流偏移的滤波器，并且基于基带发送信号和滤波后的基带接收信号产生抵消信号，以输入到求和模块 。
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2.发明授权公开(公告)号：US08320866B2
公开(公告)日：2012-11-27
申请号：US12704499
申请日：2010-02-11
申请人： Patrick Pratt , William Plumb , Sophie Gault , Pei-Shiun Chung
发明人： Patrick Pratt , William Plumb , Sophie Gault , Pei-Shiun Chung
摘要： A wireless communication unit includes a transmitter, a receiver, a selectivity element and a baseband processing module. The receiver has at least one summation module arranged to add a cancellation signal to the quadrature baseband receive signal. a baseband processing module arranged to: receive the quadrature baseband transmit signal and quadrature baseband receive signal; apply independent gain and phase adjustments to quadrature portions of the quadrature baseband transmit signal, based on at least one signal component of the quadrature baseband receive signal, to form independent cancellation signals; and apply the independent cancellation signals to the at least one summation module.
摘要翻译： 无线通信单元包括发射机，接收机，选择性元件和基带处理模块。 接收器具有至少一个求和模块，其被布置成将抵消信号加到正交基带接收信号。 基带处理模块，被配置为：接收正交基带发送信号和正交基带接收信号; 基于正交基带接收信号的至少一个信号分量对正交基带发送信号的正交部分进行独立的增益和相位调整，以形成独立的消除信号; 以及将所述独立消除信号应用于所述至少一个求和模块。
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3.发明申请公开(公告)号：US20110195672A1
公开(公告)日：2011-08-11
申请号：US12704484
申请日：2010-02-11
申请人： Patrick Pratt , William Plumb , Sophie Gault , Pei-Shiun Chung
发明人： Patrick Pratt , William Plumb , Sophie Gault , Pei-Shiun Chung
CPC分类号： H04B1/525
摘要： A wireless communication unit includes a transmitter for processing a baseband transmit signal to produce a first radio frequency signal. A receiver is arranged to convert a second radio frequency signal to a baseband receive signal, where the receiver has a summation module arranged to add a cancellation signal to the baseband receive signal. A selectivity element is arranged to couple the transmitter and the receiver to an antenna, where a reduced portion of the first radio frequency signal is introduced into the second radio frequency signal thereby creating a second order inter-modulation distortion component in the baseband receive signal. An adaptive estimator module has a filter for filtering the baseband receive signal to remove dc offsets associated with the second order inter-modulation distortion component and generate the cancellation signal based on the baseband transmit signal and the filtered baseband receive signal for inputting to the summation module.
摘要翻译： 无线通信单元包括用于处理基带发射信号以产生第一射频信号的发射机。 接收器被布置为将第二射频信号转换为基带接收信号，其中接收器具有被设置为将相消号信号加到基带接收信号上的求和模块。 布置选择性元件以将发射器和接收器耦合到天线，其中第一射频信号的减少的部分被引入到第二射频信号中，从而在基带接收信号中产生二阶互调失真分量。 自适应估计器模块具有用于对基带接收信号进行滤波以去除与二阶互调失真分量相关联的直流偏移的滤波器，并且基于基带发送信号和滤波后的基带接收信号产生抵消信号，以输入到求和模块 。
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4.发明申请公开(公告)号：US20110195673A1
公开(公告)日：2011-08-11
申请号：US12704499
申请日：2010-02-11
申请人： Patrick Pratt , William Plumb , Sophie Gault , Pei-Shiun Chung
发明人： Patrick Pratt , William Plumb , Sophie Gault , Pei-Shiun Chung
IPC分类号： H04B1/44
摘要： A wireless communication unit includes a transmitter, a receiver, a selectivity element and a baseband processing module. The receiver has at least one summation module arranged to add a cancellation signal to the quadrature baseband receive signal. a baseband processing module arranged to: receive the quadrature baseband transmit signal and quadrature baseband receive signal; apply independent gain and phase adjustments to quadrature portions of the quadrature baseband transmit signal, based on at least one signal component of the quadrature baseband receive signal, to form independent cancellation signals; and apply the independent cancellation signals to the at least one summation module.
摘要翻译： 无线通信单元包括发射机，接收机，选择性元件和基带处理模块。 接收器具有至少一个求和模块，其被布置成将抵消信号加到正交基带接收信号。 基带处理模块，被配置为：接收正交基带发送信号和正交基带接收信号; 基于正交基带接收信号的至少一个信号分量对正交基带发送信号的正交部分进行独立的增益和相位调整，以形成独立的消除信号; 以及将所述独立消除信号应用于所述至少一个求和模块。
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公开(公告)号：US09048900B2
公开(公告)日：2015-06-02
申请号：US13796236
申请日：2013-03-12
CPC分类号： H04B1/0475 , H04B1/10 , H04B1/123 , H04B1/525 , H04L5/14 , H04L5/1423 , H04L5/1461
摘要： An all digital model of nonlinear transmitter signal distortion in signals received at a receiver of a transmitter-receiver may be used to estimate distortion. The estimated distortion may then be cancelled from the received signals to improve signal quality of the received signal. The digital nonlinear model may be part of an estimator circuit that estimates nonlinear distortion terms by applying a formula or transformation to a digitized version of the signals transmitter at a transmitter of the transmitter-receiver. A mixer may be used to shift a frequency of the estimated nonlinear terms away from a transmitter frequency so that the nonlinear terms can later be subtracted from the incoming signal received at the receiver at a receiver frequency. Circuits and methods are provided.
摘要翻译： 可以使用在发射机 - 接收机的接收机处接收的信号中的非线性发射机信号失真的全数字模型来估计失真。 然后可以从接收的信号中消除估计的失真，以改善接收信号的信号质量。 数字非线性模型可以是通过在发射机 - 接收机的发射机处对信号发射机的数字化版本应用公式或变换来估计非线性失真项的估计器电路的一部分。 可以使用混频器将估计的非线性项的频率偏离发射机频率，使得可以在接收机频率处从接收机接收的输入信号中减去非线性项。 提供电路和方法。
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6.发明授权公开(公告)号：US08265573B2
公开(公告)日：2012-09-11
申请号：US12096550
申请日：2005-12-07
申请人： Michael O'Brien , Denis Dineen , Patrick Pratt
发明人： Michael O'Brien , Denis Dineen , Patrick Pratt
CPC分类号： H04W52/36 , H03G3/3047 , H04W52/52
摘要： A wireless subscriber communication unit comprises a transmitter having a power amplifier and a feedback power control loop having a power control function arranged to set an output power level of the power amplifier. The power control function is arranged to perform a back-off of the output power prior to completion of a transmission burst.
摘要翻译： 无线用户通信单元包括具有功率放大器的发射机和具有布置成设置功率放大器的输出功率电平的功率控制功能的反馈功率控制回路。 功率控制功能被布置成在完成传输突发之前执行输出功率的退避。
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7.发明申请WIRELESS COMMUNICATION UNIT, INTEGRATED CIRCUIT AND METHOD OF POWER CONTROL OF A POWER AMPLIFIER THEREFOR 有权无线通信单元，集成电路及其功率放大器的功率控制方法公开(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。
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公开(公告)号：US20140362949A1
公开(公告)日：2014-12-11
申请号：US13914970
申请日：2013-06-11
申请人： Patrick Pratt
发明人： Patrick Pratt
CPC分类号： H03F1/3241 , H03F1/3247 , H03F3/189 , H03F3/245 , H04B1/0475 , H04B2001/0425
摘要： A predetermined nonlinearity may be introduced between a digital predistorter and a power amplifier of a RF transmitter. The nonlinearity may be applied to an output of a digital predistorter. The application of the nonlinearity to the predistorter output may expand a bandwidth of the predistorter output from a first lower bandwidth to a higher second bandwidth of the power amplifier that may be needed to support a predetermined data transfer rate at the RF transmitter. Introducing this nonlinearity between the predistorter and the power amplifier may reduce the sampling rate and power requirements of components included as part of a predistortion device. As a result less noise may be generated and less power may be consumed, resulting in smaller, more efficient, and more accurate predistortion and/or RF transmission systems.
摘要翻译： 可以在RF发射机的数字预失真器和功率放大器之间引入预定的非线性。 非线性可以应用于数字预失真器的输出。 将非线性应用于预失真器输出可以将预失真器输出的带宽从第一较低带宽扩展到功率放大器的较高的第二带宽，以支持RF发射器处的预定数据传输速率。 引入预失真器和功率放大器之间的这种非线性可以降低作为预失真器件的一部分所包含的元件的采样率和功率要求。 因此，可能产生较少的噪声并且可能消耗更少的功率，导致更小，更有效和更准确的预失真和/或RF传输系统。
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9.发明授权Wireless communication unit, integrated circuit and method of power control therein 有权无线通信单元，集成电路及其功率控制方法公开(公告)号：US08442456B2
公开(公告)日：2013-05-14
申请号：US12671233
申请日：2007-08-09
CPC分类号： H04B1/0475 , H03F1/0211 , H03F1/34 , H03F3/19 , H03F3/24 , H03G3/3047 , H04B2001/0433 , H04W52/52
摘要： A wireless communication unit comprises a transmitter having a power amplifier and a feedback path operably coupled to the power amplifier. The feedback path comprises a coupler for feeding back a portion of a signal to be transmitted and a detector for detecting a power level of the fed back signal. A controller provides a ramp signal to the power amplifier that controls an amplitude characteristic of the signal to be transmitted. Averaging logic is operably coupled to the detector and arranged to average the detected power level over a first period. Comparison logic is operably coupled to the averaging logic and arranged to compare the average detected power level with a reference value. The controller is operably coupled to the comparison logic and arranged to scale a ramp signal applied to the power amplifier in response to the comparison.
摘要翻译： 无线通信单元包括具有功率放大器和可操作地耦合到功率放大器的反馈路径的发射机。 反馈路径包括用于反馈要发送的信号的一部分的耦合器和用于检测反馈信号的功率电平的检测器。 控制器向功率放大器提供斜坡信号，该功率放大器控制要发送的信号的幅度特性。 平均逻辑可操作地耦合到检测器并且被布置成在第一周期内平均检测到的功率电平。 比较逻辑可操作地耦合到平均逻辑并且被布置成将平均检测到的功率电平与参考值进行比较。 控制器可操作地耦合到比较逻辑，并且被布置为响应于比较来施加到功率放大器的斜坡信号。
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10.发明授权Integrated circuit, wireless communication unit and method for quadrature power detection 有权集成电路，无线通信单元和正交功率检测方法公开(公告)号：US08380145B2
公开(公告)日：2013-02-19
申请号：US13156313
申请日：2011-06-08
CPC分类号： H04B17/11
摘要： An integrated circuit for a wireless communication unit has a transmit power control system employing a quadrature (I/Q) based power detector having at least one reference path and at least one detector path. The integrated circuit includes: a first quadrature error determination module for determining a quadrature error of a transmit signal and a second quadrature error determination module for determining a quadrature error of a detector signal input to the at least one detector path; a first quadrature balancing module arranged to correct for quadrature error of the transmit signal and output a reference signal to the at least one reference path; a second quadrature balancing module arranged to correct for quadrature error of the reference signal input to the at least one reference path, and a third quadrature balancing module arranged to correct for quadrature error of the detector signal input from the at least one detector path.
摘要翻译： 一种用于无线通信单元的集成电路具有采用具有至少一个参考路径和至少一个检测器路径的基于正交（I / Q）的功率检测器的发射功率控制系统。 集成电路包括：用于确定发射信号的正交误差的第一正交误差确定模块和用于确定输入至少一个检测器路径的检测器信号的正交误差的第二正交误差确定模块; 第一正交平衡模块，被布置为校正所述发射信号的正交误差，并将参考信号输出到所述至少一个参考路径; 第二正交平衡模块，其布置成校正输入到所述至少一个参考路径的参考信号的正交误差;以及第三正交平衡模块，被配置为校正从所述至少一个检测器路径输入的检测器信号的正交误差。
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