Distortion compensation apparatus and method
    2.
    发明授权
    Distortion compensation apparatus and method 有权
    失真补偿装置及方法

    公开(公告)号:US08571495B2

    公开(公告)日:2013-10-29

    申请号:US12701923

    申请日:2010-02-08

    IPC分类号: H04B1/04 H01Q11/12

    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。

    Distortion compensating apparatus, transmitting apparatus, and distortion compensating method
    3.
    发明授权
    Distortion compensating apparatus, transmitting apparatus, and distortion compensating method 有权
    失真补偿装置,发送装置和失真补偿方法

    公开(公告)号:US08451055B2

    公开(公告)日:2013-05-28

    申请号:US13011295

    申请日:2011-01-21

    IPC分类号: H03F1/26

    CPC分类号: H03F1/3247 H03F2201/3233

    摘要: An apparatus includes: a unit that stores the look-up table including distortion compensation coefficients; a unit that selects addresses according to an input signal, acquires coefficients stored at the selected addresses, and performs the predistortion of the input signal by using the acquired coefficients; a unit that calculates an error signal by comparing with the input signal a feedback signal that indicates an output of a power amplifier to which a result of the predistortion is inputted; a unit that calculates coefficients from the error signal and the acquired coefficients by using the adaptive algorithm; a unit that, for each of the selected addresses, selects coefficients as adequate coefficients from among the calculated coefficients according to the error signal; and a unit that, for each of the selected addresses, calculates an average value of the adequate coefficients and replaces a stored coefficient in the look-up table with the average value.

    摘要翻译: 一种装置,包括:存储包括失真补偿系数的查找表的单元; 根据输入信号选择地址的单元,获取存储在所选择的地址的系数,并通过使用获取的系数来执行输入信号的预失真; 通过与输入信号进行比较来计算误差信号的单元,反馈信号指示输入预失真结果的功率放大器的输出; 通过使用自适应算法从误差信号和采集的系数计算系数的单元; 对于每个所选择的地址,根据误差信号从所计算的系数中选择系数作为适当系数的单元; 以及对于每个所选择的地址,计算所述适当系数的平均值并且用所述平均值替换所述查找表中存储的系数的单元。

    Distortion compensation apparatus and method
    5.
    发明授权
    Distortion compensation apparatus and method 有权
    失真补偿装置及方法

    公开(公告)号:US07991073B2

    公开(公告)日:2011-08-02

    申请号:US12639510

    申请日:2009-12-16

    IPC分类号: H04L25/49 H03K7/00

    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
    6.
    发明授权
    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:US07881404B2

    公开(公告)日:2011-02-01

    申请号:US12567510

    申请日:2009-09-25

    IPC分类号: H04L25/49 H03C3/08

    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
    7.
    发明授权
    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:US07746957B2

    公开(公告)日:2010-06-29

    申请号:US12567431

    申请日:2009-09-25

    IPC分类号: H04L25/49 H03C3/08

    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。

    DISTORTION COMPENSATING APPARATUS AND POWER AMPLIFIER APPARATUS
    10.
    发明申请
    DISTORTION COMPENSATING APPARATUS AND POWER AMPLIFIER APPARATUS 有权
    失真补偿装置和功率放大器装置

    公开(公告)号:US20090190647A1

    公开(公告)日:2009-07-30

    申请号:US12333576

    申请日:2008-12-12

    IPC分类号: H04L27/01

    摘要: A distortion compensating apparatus has an adaptive distortion compensating unit to compensate nonlinear distortion by controlling an input signal of a nonlinear distortion circuit by using an adaptive algorithm so as to reduce an error between a reference signal and a feedback signal from the nonlinear distortion circuit; and an adaptive equalizer connected between the adaptive distortion compensating unit and the nonlinear distortion circuit or provided in front of the adaptive distortion compensating unit. The adaptive equalizer includes a digital filter to form an amplitude characteristic and a phase characteristic of the input signal on the basis of a filter coefficient group that is set to the digital filter; a memory to hold in advance the filter coefficient group; and a control unit to control reading of the filter coefficient group from the memory on the basis of the input signal and the feedback signal.

    摘要翻译: 失真补偿装置具有自适应失真补偿单元,用于通过使用自适应算法来控制非线性失真电路的输入信号来补偿非线性失真,以便减少来自非线性失真电路的参考信号和反馈信号之间的误差; 以及连接在自适应失真补偿单元和非线性失真电路之间或设置在自适应失真补偿单元前面的自适应均衡器。 自适应均衡器包括数字滤波器,用于基于设置到数字滤波器的滤波器系数组来形成输入信号的幅度特性和相位特性; 提前保存滤波器系数组的存储器; 以及控制单元,其基于输入信号和反馈信号来控制从存储器读取滤波器系数组。