知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

55 条记录 (耗时 0.016 秒)

    Predistortion apparatus and predistortion method
    11.
    发明授权
    Predistortion apparatus and predistortion method 有权
    预失真装置和预失真方法

    公开(公告)号：US07920644B2

    公开(公告)日：2011-04-05

    申请号：US12642003

    申请日：2009-12-18

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

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

    IPC分类号： H04L25/49

    CPC分类号： H03F1/3247

    摘要： A predistortion apparatus for compensating for a distortion arising from a non linear property in input to output characteristics of an amplifier, by processing calculation of a plurality of coefficients for a plurality of power series defining the predistortion characteristics for a plurality of power ranges, respectively, the predistortion apparatus includes: a coefficient update unit for setting and updating coefficients of the power series to provide the predistortion characteristics for the plurality of power ranges in accordance with a comparison between the input and output of the amplifier; and a determination unit for determining at least one threshold value defining the plurality of power ranges by shifting the threshold value and operating the coefficient update unit for updating the coefficients for each of the power series corresponding to each of the power ranges defined by the shifted threshold value.

    摘要翻译： 一种预失真装置，用于通过分别对多个功率范围的多个功率系列的多个功率系列进行计算，以分别对多个功率范围的预失真特性进行处理，来补偿由输入到放大器的输出特性中的非线性特性引起的失真， 预失真装置包括：系数更新单元，用于根据放大器的输入和输出之间的比较，设置和更新功率系列的系数，以提供多个功率范围的预失真特性; 以及确定单元，用于通过偏移所述阈值来确定定义所述多个功率范围的至少一个阈值，并操作所述系数更新单元，用于更新与由所述移位阈值定义的每个功率范围对应的每个功率序列的系数 值。

    WIRELESS APPARATUS AND SIGNAL PROCESSING METHOD
    12.
    发明申请
    WIRELESS APPARATUS AND SIGNAL PROCESSING METHOD 有权
    无线设备和信号处理方法

    公开(公告)号：US20110038400A1

    公开(公告)日：2011-02-17

    申请号：US12794124

    申请日：2010-06-04

    申请人： Hiroyoshi Ishikawa ,  Kazuo Nagatani ,  Hajime Hamada ,  Nobukazu Fudaba ,  Yuichi Utsunomiya ,  Takeshi Ohba ,  Hideharu Shako ,  Yasuhito Funyu

    发明人： Hiroyoshi Ishikawa ,  Kazuo Nagatani ,  Hajime Hamada ,  Nobukazu Fudaba ,  Yuichi Utsunomiya ,  Takeshi Ohba ,  Hideharu Shako ,  Yasuhito Funyu

    IPC分类号： H04L27/18 ,  H04B1/38

    CPC分类号： H04L27/2337

    摘要： A wireless apparatus includes: an A/D converter which samples an in-phase signal component and a quadrature signal component from a quadrature-modulated signal of analog form alternately; a digital quadrature demodulation unit which applies digital quadrature demodulation to an output signal of the A/D converter and outputs an in-phase signal and a quadrature signal; and an error detection unit which, based on the in-phase and quadrature signals output from the digital quadrature demodulation unit, detects a time difference error between the sample timing of the in-phase signal component and the sample timing of the quadrature signal component.

    摘要翻译： 无线装置包括：A / D转换器，其交替地从模拟形式的正交调制信号中采样同相信号分量和正交信号分量; 数字正交解调单元，对A / D转换器的输出信号进行数字正交解调，并输出同相信号和正交信号; 以及误差检测单元，其基于从数字正交解调单元输出的同相和正交信号，检测同相信号分量的采样定时与正交信号分量的采样定时之间的时差误差。

    DISTORTION COMPENSATION APPARATUS AND METHOD
    13.
    发明申请
    DISTORTION COMPENSATION APPARATUS AND METHOD 有权
    失真补偿装置和方法

    公开(公告)号：US20100219889A1

    公开(公告)日：2010-09-02

    申请号：US12701923

    申请日：2010-02-08

    申请人： Kazuo NAGATANI ,  Yuichi UTSUNOMIYA ,  Hajime HAMADA ,  Hiroyoshi ISHIKAWA ,  Nobukazu FUDABA ,  Shohei ISHIKAWA

    发明人： Kazuo NAGATANI ,  Yuichi UTSUNOMIYA ,  Hajime HAMADA ,  Hiroyoshi ISHIKAWA ,  Nobukazu FUDABA ,  Shohei ISHIKAWA

    IPC分类号： H03F1/26

    CPC分类号： H04L27/366 ,  H03F1/3258 ,  H03F3/195 ,  H03F3/24 ,  H03F2201/3233

    摘要： A distortion compensation apparatus includes a distortion compensation signal generation unit that performs, on a transmission signal, distortion compensation processing using a series operation; a coefficient updating unit that updates series operation coefficients used for the series operation based on a feedback signal of a power amplification output which is output through power amplification processing of a distortion compensation signal output from the distortion compensation signal generation unit, and based on the distortion compensation signal; a memory that stores the distortion compensation signal corresponding to a transmission signal having a given power value and the feedback signal of the power amplification output as restraint information; and a control unit that performs control so that, in accordance with the power value of the transmission signal, restraint information corresponding to a power value different from the power value of the transmission signal is read and used for updating the series operation coefficients.

    摘要翻译： 失真补偿装置包括失真补偿信号生成单元，其对传输信号进行使用串联操作的失真补偿处理; 系数更新单元，其基于通过从失真补偿信号生成单元输出的失真补偿信号的功率放大处理输出的功率放大输出的反馈信号，并且基于失真来更新用于串联运算的串联运算系数 补偿信号; 存储器，其存储与具有给定功率值的发送信号对应的失真补偿信号和功率放大输出的反馈信号作为约束信息; 以及控制单元，其执行控制，使得根据所述发送信号的功率值，读取与所述发送信号的功率值不同的功率值对应的约束信息，并且用于更新所述串联操作系数。

    PREDISTORTION APPARATUS AND PREDISTORTION METHOD
    14.
    发明申请
    PREDISTORTION APPARATUS AND PREDISTORTION METHOD 有权
    预测装置和预测方法

    公开(公告)号：US20100164620A1

    公开(公告)日：2010-07-01

    申请号：US12642003

    申请日：2009-12-18

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

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

    IPC分类号： H03F1/26

    CPC分类号： H03F1/3247

    摘要： A predistortion apparatus for compensating for a distortion arising from a non linear property in input to output characteristics of an amplifier, by processing calculation of a plurality of coefficients for a plurality of power series defining the predistortion characteristics for a plurality of power ranges, respectively, the predistortion apparatus includes: a coefficient update unit for setting and updating coefficients of the power series to provide the predistortion characteristics for the plurality of power ranges in accordance with a comparison between the input and output of the amplifier; and a determination unit for determining at least one threshold value defining the plurality of power ranges by shifting the threshold value and operating the coefficient update unit for updating the coefficients for each of the power series corresponding to each of the power ranges defined by the shifted threshold value.

    摘要翻译： 一种预失真装置，用于通过分别对多个功率范围的多个功率系列的多个功率系列进行计算，以分别对多个功率范围的预失真特性进行处理，来补偿由输入到放大器的输出特性中的非线性特性引起的失真， 预失真装置包括：系数更新单元，用于根据放大器的输入和输出之间的比较，设置和更新功率系列的系数，以提供多个功率范围的预失真特性; 以及确定单元，用于通过偏移所述阈值来确定定义所述多个功率范围的至少一个阈值，并操作所述系数更新单元，用于更新与由所述移位阈值定义的每个功率范围对应的每个功率序列的系数 值。

    DISTORTION COMPENSATION APPARATUS AND METHOD
    15.
    发明申请
    DISTORTION COMPENSATION APPARATUS AND METHOD 有权
    失真补偿装置和方法

    公开(公告)号：US20100156530A1

    公开(公告)日：2010-06-24

    申请号：US12639510

    申请日：2009-12-16

    申请人： Yuichi UTSUNOMIYA ,  Hajime Hamada ,  Hiroyoshi Ishikawa ,  Nobukazu Fudaba ,  Kazuo Nagatani

    发明人： Yuichi UTSUNOMIYA ,  Hajime Hamada ,  Hiroyoshi Ishikawa ,  Nobukazu Fudaba ,  Kazuo Nagatani

    IPC分类号： H03F1/26

    CPC分类号： H03F3/24 ,  H03F1/3247 ,  H03F1/3258 ,  H03F2200/105 ,  H03F2200/207 ,  H03F2201/3227 ,  H03F2201/3233 ,  H04L27/368

    摘要： A distortion compensation apparatus includes a distortion compensation unit that performs distortion compensation processing on a transmission signal by a series operation, a coefficient update unit that updates a group of series operation coefficients used for the series operation based on a feedback signal of transmission signal output that is output after power amplification processing is performed on output of the distortion compensation unit and the transmission signal, an initial coefficient memory that stores the groups of series operation coefficients that become initial values for coefficient update processing by the coefficient update unit, and a power fluctuation detection unit that detects a power fluctuation of the transmission signal and, when the power fluctuation is detected, reads the groups of series operation coefficients from the initial coefficient memory and provides the groups of series operation coefficients to the coefficient update unit.

    摘要翻译： 失真补偿装置包括：通过串联运算对发送信号进行失真补偿处理的失真补偿部，基于发送信号输出的反馈信号更新用于串联运算的一组串联运算系数的系数更新部， 在对失真补偿单元和发送信号的输出执行功率放大处理之后输出;存储由系数更新单元存储成为系数更新处理的初始值的串联运算系数组的初始系数存储器，以及功率波动 检测单元，其检测发送信号的功率波动，并且当检测到功率波动时，从初始系数存储器读取串联操作系数组，并将系列操作系数组提供给系数更新单元。

    DISTORTION CORRECTION CONTROL APPARATUS AND DISTORTION CORRECTION CONTROL METHOD
    16.
    发明申请
    DISTORTION CORRECTION CONTROL APPARATUS AND DISTORTION CORRECTION CONTROL METHOD 有权
    失真校正控制装置和失真校正控制方法

    公开(公告)号：US20100062733A1

    公开(公告)日：2010-03-11

    申请号：US12567510

    申请日：2009-09-25

    申请人： Hiroyoshi Ishikawa ,  Kazuo Nagatani ,  Hajime Hamada ,  Nobukazu Fudaba ,  Yuichi Utsunomiya ,  Yasuyuki Oishi

    发明人： Hiroyoshi Ishikawa ,  Kazuo Nagatani ,  Hajime Hamada ,  Nobukazu Fudaba ,  Yuichi Utsunomiya ,  Yasuyuki Oishi

    IPC分类号： H04B1/04

    CPC分类号： H03F1/32 ,  H03F1/3241 ,  H03F1/3247 ,  H03F3/19

    摘要： A distortion correction control apparatus is for compensating for a burst distortion of a transmission amplifier caused by a burst of an input signal of a transmission target. The apparatus includes a generation unit that generates a distortion correction coefficient having reverse characteristics to the foregoing burst distortion; a unit that multiplies the distortion correction coefficient output from the generation unit by the input signal or adds the distortion correction coefficient output from the generation unit to the input signal, upon reception of burst information notifying of switching between presence and absence of the input signal; and an update unit that updates, based on the input signal and a branch signal fed back as an output signal of the transmission amplifier, parameters of functions used for adaptively generating the distortion correction coefficient, and that inputs the updated parameters to the generation unit.

    摘要翻译： 失真校正控制装置用于补偿由发射目标的输入信号的脉冲串引起的发射放大器的脉冲串失真。 该装置包括产生具有与上述突发畸变相反的特性的失真校正系数的生成单元; 一个单元，用于通过输入信号将从生成单元输出的失真校正系数乘以输入信号，或将从生成单元输出的失真校正系数与输入信号相加，或者将通过输入信号存在与不存在切换之间的突发信息相加; 以及更新单元，其基于所述输入信号和作为所述发送放大器的输出信号反馈的分支信号来更新用于自适应地生成所述失真校正系数的功能的参数，并且将更新的参数输入到所述生成单元。

    DISTORTION CORRECTION CONTROL APPARATUS AND DISTORTION CORRECTION CONTROL METHOD
    17.
    发明申请
    DISTORTION CORRECTION CONTROL APPARATUS AND DISTORTION CORRECTION CONTROL METHOD 有权
    失真校正控制装置和失真校正控制方法

    公开(公告)号：US20100014609A1

    公开(公告)日：2010-01-21

    申请号：US12567431

    申请日：2009-09-25

    申请人： Hiroyoshi Ishikawa ,  Kazuo Nagatani ,  Hajime HAMADA ,  Nobukazu Fudaba ,  Yuichi Utsunomiya ,  Yasuyuki Oishi

    发明人： Hiroyoshi Ishikawa ,  Kazuo Nagatani ,  Hajime HAMADA ,  Nobukazu Fudaba ,  Yuichi Utsunomiya ,  Yasuyuki Oishi

    IPC分类号： H04L25/03

    CPC分类号： H03F1/3247 ,  H03F2201/3233

    摘要： A distortion correction control apparatus is for compensating for a burst distortion in a transmission amplifier caused by a burst of an input signal of a transmission target. The apparatus includes a holding unit that stores a distortion correction coefficient having reverse characteristics to the burst distortion; a unit that multiplies the distortion correction coefficient read out from the holding unit by the input signal or adds the distortion correction coefficient read out from the holding unit to the input signal, upon reception of burst information notifying of switching between presence and absence of the input signal; and an update unit that updates, based on the input signal, the distortion correction coefficient of the last time, and a signal fed back as an output signal of the transmission amplifier, the distortion correction coefficient by an adaptive algorithm, and that inputs the updated distortion correction coefficient to the holding unit.

    摘要翻译： 失真校正控制装置用于补偿由发送目标的输入信号的脉冲串引起的发送放大器中的脉冲串失真。 该装置包括保存单元，其存储具有与突发失真相反特性的失真校正系数; 将从保持单元读出的失真校正系数乘以输入信号的单位，或者在接收到通知输入有无之间切换的突发信息时，将从保持单元读出的失真校正系数与输入信号相加 信号; 以及更新单元，其基于输入信号更新上一次的失真校正系数，以及作为发送放大器的输出信号反馈的信号，通过自适应算法更新失真校正系数，并且输入更新的 失真校正系数到保持单元。