公开(公告)号：US08655289B2

公开(公告)日：2014-02-18

申请号：US13367532

申请日：2012-02-07

申请人： Nobukazu Fudaba ,  Hiroyoshi Ishikawa ,  Yuichi Utsunomiya ,  Kazuo Nagatani

发明人： Nobukazu Fudaba ,  Hiroyoshi Ishikawa ,  Yuichi Utsunomiya ,  Kazuo Nagatani

IPC分类号： H04B1/04

CPC分类号： H03F1/3247 ,  H03F1/3241 ,  H03F1/34 ,  H03F3/24 ,  H03F2201/3224 ,  H03F2201/3233 ,  H04B2001/0425 ,  H04B2001/0433

摘要： A distortion compensation device includes a distortion compensator that predistorts an input signal based on delay signals and distortion compensation coefficients corresponding to the respective delay signals obtained by applying different amounts of delay to the input signal, a calculator that calculates an error signal based on the predistorted input signal and an output signal from an amplifier that amplifies the predistorted input signal, a calculator that calculates prospective distortion compensation coefficients for updating the distortion compensation coefficients, based on the error signal, a saturation processor that performs saturation processing for bringing, when the prospective distortion compensation coefficients do not fall into a preset range, the prospective distortion compensation coefficients into the preset range, and a controller that controls the updating of the distortion compensation coefficients based on pieces of coefficient saturation information indicating whether the saturation processing is performed on the prospective distortion compensation coefficients.

摘要翻译： 失真补偿装置包括：失真补偿器，其基于延迟信号预失真输入信号，以及对应于通过对输入信号应用不同量的延迟而获得的各个延迟信号的失真补偿系数;计算器，其基于预失真来计算误差信号 输入信号和来自放大预失真输入信号的放大器的输出信号，计算器，其基于误差信号计算用于更新失真补偿系数的预期失真补偿系数;饱和处理器，执行饱和处理，以便在预期 失真补偿系数不落入预设范围，预期失真补偿系数为预设范围，以及控制器，其基于系数饱和度信息指示来控制失真补偿系数的更新 是否对预期失真补偿系数执行饱和处理。

公开(公告)号：US08525592B2

公开(公告)日：2013-09-03

申请号：US13405441

申请日：2012-02-27

申请人： Nobukazu Fudaba ,  Hiroyoshi Ishikawa ,  Yuichi Utsunomiya ,  Kazuo Nagatani

发明人： Nobukazu Fudaba ,  Hiroyoshi Ishikawa ,  Yuichi Utsunomiya ,  Kazuo Nagatani

IPC分类号： H03F1/26

CPC分类号： H03F3/24 ,  H03F1/3247 ,  H03F1/3258 ,  H03F3/189 ,  H03F2200/336 ,  H03F2201/3233

摘要： A power amplifier amplifies a signal. An error signal calculating unit calculates an error signal in accordance with an input signal and an output from the power amplifier. A distortion compensation unit performs predistortion on the input signal by using distortion compensation coefficients that are generated in accordance with a plurality of delay signals obtained by giving different amounts of delay to the input signal and by using an error signal and outputs the input signal subjected to the predistortion to the signal amplifying unit. A tap interval control unit controls the delay intervals of the delay signals that are used for the predistortion performed by the distortion compensation unit in accordance with signal correlation information calculated from the input signal.

摘要翻译： 功率放大器放大信号。 误差信号计算单元根据输入信号和来自功率放大器的输出来计算误差信号。 失真补偿单元通过使用根据通过对输入信号赋予不同量的延迟而获得的多个延迟信号而产生的失真补偿系数，并且通过使用误差信号，并且输出经受 对信号放大单元的预失真。 抽头间隔控制单元根据从输入信号计算的信号相关信息来控制用于由失真补偿单元执行的预失真的延迟信号的延迟间隔。

公开(公告)号：US20130040587A1

公开(公告)日：2013-02-14

申请号：US13558620

申请日：2012-07-26

申请人： Hiroyoshi Ishikawa ,  Kazuo Nagatani ,  Nobukazu Fudaba ,  Yuichi Utsunomiya

发明人： Hiroyoshi Ishikawa ,  Kazuo Nagatani ,  Nobukazu Fudaba ,  Yuichi Utsunomiya

IPC分类号： H03F1/26 ,  H04B1/04

CPC分类号： H03F1/3258 ,  H03F1/3241 ,  H03F1/3247 ,  H03F3/189 ,  H03F3/245 ,  H03F2200/105 ,  H03F2201/3233 ,  H04B1/0475 ,  H04B2001/0425

摘要： A distortion compensation device includes: a frequency-characteristic adding unit configured to add a frequency characteristic to an error signal to generate an added error signal, the error signal being a difference between an input signal input to an amplifier and an output signal output from the amplifier; a distortion-compensation-coefficient updating unit configured to update a distortion compensation coefficient for compensating for a distortion characteristic of the amplifier based on the added error signal; and a distortion compensation unit configured to perform distortion compensation on the input signal using the updated distortion compensation coefficient.

摘要翻译： 失真补偿装置包括：频率特性相加单元，被配置为向误差信号添加频率特性以产生相加的误差信号，所述误差信号是输入到放大器的输入信号与从所述输出信号输出的输出信号之间的差 放大器 失真补偿系数更新单元，被配置为基于所添加的误差信号来更新用于补偿所述放大器的失真特性的失真补偿系数; 以及失真补偿单元，被配置为使用更新的失真补偿系数对输入信号执行失真补偿。