公开(公告)号：US07801245B2

公开(公告)日：2010-09-21

申请号：US11617133

申请日：2006-12-28

申请人： Rajan Bhandari ,  Stephen Summerfield ,  Alan Barry Christie

发明人： Rajan Bhandari ,  Stephen Summerfield ,  Alan Barry Christie

IPC分类号： H04L25/49 ,  H04B1/04

CPC分类号： H04L25/03343

摘要： Determining a predistortion function includes sampling a signal to obtain a plurality of capture sets within a single sampling window. Each of the capture sets is analyzed to determine whether it satisfies preselected criteria. Example criteria include desired characteristics of a capture set average power, capture set peak power and a number of peaks within a capture set. If any capture set within the sampling window satisfies all of the preselected criteria and has the highest number of peaks, that capture set will be used for determining a predistortion function. A multiple capture set selection module applies the preselected criteria for selecting an appropriate capture set for determining the predistortion function. The predistortion function is used for applying predistortion to a signal before that signal is processed by a distorting component that introduces distortion so that the predistortion can compensate for or cancel out such distortion.

摘要翻译： 确定预失真功能包括对信号进行采样以在单个采样窗口内获得多个捕获集合。 分析每个捕获组以确定其是否满足预选标准。 示例标准包括捕获设置平均功率的所需特性，捕获设置峰值功率和捕获集合内的峰值数量。 如果采样窗口内的任何捕获设置满足所有预先选择的标准并且具有最高峰值，则捕获集合将被用于确定预失真函数。 多重捕获集合选择模块应用用于选择用于确定预失真函数的适当捕获集合的预选标准。 预失真函数用于在信号由引入失真的失真分量处理信号之前对信号进行预失真，以便预失真可以补偿或消除这种失真。

公开(公告)号：US07746167B1

公开(公告)日：2010-06-29

申请号：US12201706

申请日：2008-08-29

申请人： Stephen Summerfield

发明人： Stephen Summerfield

IPC分类号： H03F1/26

CPC分类号： H03F3/195 ,  H03F1/3247 ,  H03F3/245 ,  H03F2200/105 ,  H03F2200/204 ,  H03F2201/3233

摘要： A method of adapting parameters for a predistortion circuit in an integrated circuit is disclosed. The method comprises receiving, at the predistortion circuit, an input signal to be amplified by a power amplifier; determining a value associated with an information tag for the input signal; applying parameters to the predistortion circuit based upon the determined value; receiving an output of the power amplifier at an input of the integrated circuit; comparing an output of the predistortion circuit with the output of the power amplifier; and generating updated parameters to be applied to the predistortion circuit. An integrated circuit having a circuit for adapting parameters for a predistortion circuit of the integrated circuit is also disclosed.

摘要翻译： 公开了一种在集成电路中调整用于预失真电路的参数的方法。 该方法包括在预失真电路处接收要由功率放大器放大的输入信号; 确定与所述输入信号的信息标签相关联的值; 基于确定的值将参数应用于预失真电路; 在所述集成电路的输入端处接收所述功率放大器的输出; 将预失真电路的输出与功率放大器的输出进行比较; 以及生成要应用于预失真电路的更新参数。 还公开了一种具有用于调整集成电路的预失真电路的参数的电路的集成电路。

公开(公告)号：US07741906B1

公开(公告)日：2010-06-22

申请号：US12201642

申请日：2008-08-29

申请人： Stephen Summerfield

发明人： Stephen Summerfield

IPC分类号： H03F1/26

CPC分类号： H03F1/3247 ,  H03F2201/3233

摘要： A method of generating parameters for a predistortion circuit in an integrated circuit is disclosed. The method comprises receiving, at the predistortion circuit, an input signal to be amplified by a power amplifier; receiving an output of the power amplifier at an input of the integrated circuit; comparing an output of the predistortion circuit with the output of the power amplifier; conforming the output of the power amplifier with the output of the predistortion circuit; and generating parameters to be applied to the predistortion circuit based upon the conformed output of the power amplifier and the predistortion circuit. An integrated circuit having a circuit for generating parameters for a predistortion circuit of the integrated circuit is also disclosed.

摘要翻译： 公开了一种为集成电路中的预失真电路产生参数的方法。 该方法包括在预失真电路处接收要由功率放大器放大的输入信号; 在所述集成电路的输入端处接收所述功率放大器的输出; 将预失真电路的输出与功率放大器的输出进行比较; 使功率放大器的输出与预失真电路的输出一致; 以及基于功率放大器和预失真电路的合格输出产生要应用于预失真电路的参数。 还公开了一种具有用于产生集成电路的预失真电路的参数的电路的集成电路。

公开(公告)号：US20080157870A1

公开(公告)日：2008-07-03

申请号：US11617144

申请日：2006-12-28

申请人： Rajan Bhandari ,  Stephen Summerfield ,  Alan Barry Christie

发明人： Rajan Bhandari ,  Stephen Summerfield ,  Alan Barry Christie

IPC分类号： H03F1/26

CPC分类号： H03F1/3247

摘要： An approach for determining corrective predistortion functions includes maintaining a history of recent estimations of a plurality of corrective predistortion functions. Each of those functions corresponds to a respective signal characteristic. By determining a feature of each of those functions from the history, one of the corrective predistortion functions is selected for a next estimation based upon which of the functions has a feature within the history that satisfies a selected criteria. In a disclosed example, the function having the lowest number of estimations within a recent history is selected as the function to have the highest priority for a next estimation.

摘要翻译： 用于确定校正预失真函数的方法包括维持多个校正预失真函数的最近估计的历史。 这些功能中的每一个对应于相应的信号特性。 通过从历史中确定每个功能的特征，基于哪个功能具有满足选定标准的历史中的特征，选择校正预失真函数之一用于下一个估计。 在公开的示例中，选择具有最近历史中的最低估计数的函数作为对下一个估计具有最高优先级的函数。

公开(公告)号：US20080157819A1

公开(公告)日：2008-07-03

申请号：US11617133

申请日：2006-12-28

申请人： Rajan Bhandari ,  Stephen Summerfield ,  Alan Barry Christie

发明人： Rajan Bhandari ,  Stephen Summerfield ,  Alan Barry Christie

IPC分类号： H03K9/00

CPC分类号： H04L25/03343

摘要： Determining a predistortion function includes sampling a signal to obtain a plurality of capture sets within a single sampling window. Each of the capture sets is analyzed to determine whether it satisfies preselected criteria. Example criteria include desired characteristics of a capture set average power, capture set peak power and a number of peaks within a capture set. If any capture set within the sampling window satisfies all of the preselected criteria and has the highest number of peaks, that capture set will be used for determining a predistortion function. A multiple capture set selection module applies the preselected criteria for selecting an appropriate capture set for determining the predistortion function. The predistortion function is used for applying predistortion to a signal before that signal is processed by a distorting component that introduces distortion so that the predistortion can compensate for or cancel out such distortion.

摘要翻译： 确定预失真功能包括对信号进行采样以在单个采样窗口内获得多个捕获集合。 分析每个捕获组以确定其是否满足预选标准。 示例标准包括捕获设置平均功率的所需特性，捕获设置峰值功率和捕获集合内的峰值数量。 如果采样窗口内的任何捕获设置满足所有预先选择的标准并且具有最高峰值，则捕获集合将被用于确定预失真函数。 多重捕获集合选择模块应用用于选择用于确定预失真函数的适当捕获集合的预选标准。 预失真函数用于在信号由引入失真的失真分量处理信号之前对信号进行预失真，以便预失真可以补偿或消除这种失真。

公开(公告)号：US08285770B1

公开(公告)日：2012-10-09

申请号：US12201718

申请日：2008-08-29

申请人： Vincent C. Barnes ,  Stephen Summerfield

发明人： Vincent C. Barnes ,  Stephen Summerfield

IPC分类号： G06F17/10

CPC分类号： H03F3/24 ,  H03F1/3247 ,  H03F1/3258 ,  H03F3/195 ,  H03F2201/3212 ,  H03F2201/3233 ,  H04L27/368

摘要： A method of generating parameters for a predistortion circuit in an integrated circuit using a matrix is disclosed. The method comprises storing a first column of a first matrix; generating the remaining columns of the first matrix based upon the first column of the matrix; generating a plurality of rows of a second matrix by performing a first set of calculations; and generating the remaining rows of the second matrix by selectively shifting the first rows of the second matrix.

摘要翻译： 公开了一种在使用矩阵的集成电路中产生用于预失真电路的参数的方法。 该方法包括存储第一矩阵的第一列; 基于矩阵的第一列生成第一矩阵的剩余列; 通过执行第一组计算来生成第二矩阵的多行; 以及通过选择性地移动第二矩阵的第一行来生成第二矩阵的剩余行。

公开(公告)号：US20100052780A1

公开(公告)日：2010-03-04

申请号：US12201702

申请日：2008-08-29

申请人： Stephen Summerfield ,  Christopher H. Dick

发明人： Stephen Summerfield ,  Christopher H. Dick

IPC分类号： H03F1/26

CPC分类号： H03F1/3247

摘要： An integrated circuit having a circuit for reducing distortion in a power amplifier is disclosed. The integrated circuit comprises a predistortion circuit coupled to receive a signal to be amplified; sample capture buffers coupled to an output of the predistortion circuit and an input/output port of the integrated circuit; and an estimator circuit coupled to the sample capture buffers, wherein the estimator circuit generates parameters for the predistortion circuit based upon the output of the predistortion circuit and an output of the power amplifier received at the input/output port of the integrated circuit. A method of reducing distortion in a power amplifier is also disclosed.

摘要翻译： 公开了一种具有减小功率放大器失真的电路的集成电路。 该集成电路包括耦合以接收待放大信号的预失真电路; 耦合到预失真电路的输出和集成电路的输入/输出端口的采样捕获缓冲器; 以及耦合到采样捕获缓冲器的估计器电路，其中估计器电路基于预失真电路的输出和在集成电路的输入/输出端口接收的功率放大器的输出产生用于预失真电路的参数。 还公开了一种降低功率放大器中的失真的方法。

公开(公告)号：US20080157869A1

公开(公告)日：2008-07-03

申请号：US11617113

申请日：2006-12-28

申请人： Rajan Bhandari ,  Stephen Summerfield ,  Alan Barry Christie

发明人： Rajan Bhandari ,  Stephen Summerfield ,  Alan Barry Christie

IPC分类号： H03F1/26

CPC分类号： H03F1/3247

摘要： A corrective predistortion function is applied to a signal to compensate for or cancel out distortion that is introduced by a component that processes the signal. A disclosed example includes applying a corrective predistortion function to a transmitted signal used for wireless communications. A technique for selecting the corrective predistortion function includes determining a current power level of the signal. When the current power level is at or below a lift level between a maximum signal power level and a minimum signal power level, a corrective predistortion function corresponding to the lift level is applied to the signal. When the actual signal power level is above the lift level, a corrective predistortion function corresponding to the actual current power level is applied.

摘要翻译： 校正预失真函数被应用于信号以补偿或消除由处理信号的组件引入的失真。 公开的示例包括对用于无线通信的发送信号应用校正预失真函数。 用于选择校正预失真功能的技术包括确定信号的当前功率电平。 当当前功率电平处于或低于最大信号功率电平和最小信号功率电平之间的电平水平时，对应于电梯电平的校正预失真功能被施加到信号。 当实际信号功率电平高于电梯电平时，应用与实际当前功率电平对应的校正预失真功能。

公开(公告)号：US06709505B2

公开(公告)日：2004-03-23

申请号：US10350607

申请日：2003-01-24

申请人： Xenophon G. Saquet ,  Jeffrey Maxwell ,  Stephen Summerfield

发明人： Xenophon G. Saquet ,  Jeffrey Maxwell ,  Stephen Summerfield

IPC分类号： B08B308

CPC分类号： C09D7/20

摘要： A universal paint solvent comprises, on a weight basis, 1-30% of an acidic material selected from the group consisting of sulfonic acids, phosphonic acids, phosphoric acids, and combinations thereof, together with 10-80% of an organic solvent selected from the group consisting of alcohols, ethers, ketones, aldehydes, esters, and combinations thereof. In particular compositions, the acidic component is comprised of a mixture of two different acids. Alkyl esters, particularly acetate esters, are preferred organic solvents. Butyl acetate is a specifically preferred solvent. The compositions solvate a large variety of different paint formulations, and are effective at room temperature. The compositions have particular utility for cleaning paint delivery systems and equipment.

摘要翻译： 通用油漆溶剂以重量计包含1-30％的选自磺酸，膦酸，磷酸及其组合的酸性物质，以及10-80％的选自以下的有机溶剂： 由醇，醚，酮，醛，酯及其组合组成的组。 在特定组合物中，酸性组分由两种不同的酸的混合物组成。 烷基酯，特别是乙酸酯，是优选的有机溶剂。 乙酸丁酯是特别优选的溶剂。 该组合物溶剂化各种不同的油漆配方，并且在室温下是有效的。 该组合物具有用于清洁涂料输送系统和设备的特殊用途。