公开(公告)号：US08514914B2

公开(公告)日：2013-08-20

申请号：US13049046

申请日：2011-03-16

申请人： Kaoru Yokoo ,  Kazuo Nagatani

发明人： Kaoru Yokoo ,  Kazuo Nagatani

IPC分类号： H04B1/38

CPC分类号： H04L27/0014 ,  H04L27/2626 ,  H04L27/2649 ,  H04L27/364 ,  H04L27/3863 ,  H04L2027/0022 ,  H04L2027/003

摘要： An IQ imbalance correction method includes transmitting a plurality of pairs of RF training signals in installments by pairing RF training signals symmetric with respect to a center frequency on a frequency axis; setting a reception local frequency to change to a frequency that is suitable to receive, via an internal path, each of the plurality of pairs of RF training signals transmitted in installments, and suitable to convert the each of the plurality of pairs of RF training signals into IF training signals; and performing quadrature demodulation on the IF training signals, respectively, in a digital circuit area to generate BB training signals.

摘要翻译： IQ不平衡校正方法包括通过配对相对于频率轴上的中心频率对称的RF训练信号来分批发送多对RF训练信号; 设置接收本地频率以改变为适合于经由内部路径接收以分期发送的多对RF训练信号中的每一个的频率，并且适于转换多对RF训练信号中的每一对 进入IF训练信号; 并在数字电路区域分别对IF训练信号执行正交解调，以产生BB训练信号。

公开(公告)号：US20110228826A1

公开(公告)日：2011-09-22

申请号：US13049046

申请日：2011-03-16

申请人： Kaoru Yokoo ,  Kazuo Nagatani

发明人： Kaoru Yokoo ,  Kazuo Nagatani

IPC分类号： H04B1/38

CPC分类号： H04L27/0014 ,  H04L27/2626 ,  H04L27/2649 ,  H04L27/364 ,  H04L27/3863 ,  H04L2027/0022 ,  H04L2027/003

摘要： An IQ imbalance correction method includes transmitting a plurality of pairs of RF training signals in installments by pairing RF training signals symmetric with respect to a center frequency on a frequency axis; setting a reception local frequency to change to a frequency that is suitable to receive, via an internal path, each of the plurality of pairs of RF training signals transmitted in installments, and suitable to convert the each of the plurality of pairs of RF training signals into IF training signals; and performing quadrature demodulation on the IF training signals, respectively, in a digital circuit area to generate BB training signals.

摘要翻译： IQ不平衡校正方法包括通过配对相对于频率轴上的中心频率对称的RF训练信号来分批发送多对RF训练信号; 设置接收本地频率以改变为适合于经由内部路径接收以分期发送的多对RF训练信号中的每一个的频率，并且适于转换多对RF训练信号中的每一对 进入IF训练信号; 并在数字电路区域分别对IF训练信号执行正交解调，以产生BB训练信号。

公开(公告)号：US08737937B2

公开(公告)日：2014-05-27

申请号：US13542368

申请日：2012-07-05

申请人： Hiroyoshi Ishikawa ,  Kazuo Nagatani ,  Nobukazu Fudaba

发明人： Hiroyoshi Ishikawa ,  Kazuo Nagatani ,  Nobukazu Fudaba

IPC分类号： H04B1/04

CPC分类号： H03F1/3258 ,  H03F1/3247 ,  H03F3/189 ,  H03F3/245 ,  H03F2201/3233

摘要： A distortion compensation apparatus includes an amplifying unit, a plurality of distortion compensation coefficient storage units, a first address generating unit, a second address generating unit, and a distortion compensating unit. The amplifying unit amplifies an input signal. A plurality of distortion compensation coefficient storage units store the distortion compensation coefficients for compensating for the distortion of the amplifying unit by being associated with two different addresses. The first address generating unit generates a first address based on the current input signal. The second address generating unit generates a second address different from the first address based on the previous input signal. The distortion compensating unit obtains the distortion compensation coefficient corresponding to a combination of the first and second addresses from each of the distortion compensation coefficient storage units and performs a pre-distortion processing for the current input signal to the amplifying unit using the obtained distortion compensation coefficient.

摘要翻译： 失真补偿装置包括放大单元，多个失真补偿系数存储单元，第一地址生成单元，第二地址生成单元和失真补偿单元。 放大单元放大输入信号。 多个失真补偿系数存储单元通过与两个不同的地址相关联来存储用于补偿放大单元的失真的失真补偿系数。 第一地址生成单元基于当前输入信号生成第一地址。 第二地址生成单元基于先前的输入信号生成与第一地址不同的第二地址。 失真补偿单元从每个失真补偿系数存储单元获得与第一和第二地址的组合相对应的失真补偿系数，并使用获得的失真补偿系数对放大单元执行当前输入信号的预失真处理 。

公开(公告)号：US08520770B2

公开(公告)日：2013-08-27

申请号：US12404455

申请日：2009-03-16

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

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

IPC分类号： H04L25/49

CPC分类号： H04L27/2623

摘要： An amplitude suppressing apparatus includes a differential circuit that calculates a differential value of amplitude of an input signal at a point when the amplitude reaches a predetermined threshold. The amplitude suppressing apparatus also includes an amplitude suppressing circuit that suppresses the amplitude of the input signal on the basis of the differential value calculated by the differential circuit.

摘要翻译： 振幅抑制装置包括差分电路，该差动电路计算振幅达到预定阈值时的输入信号的振幅的微分值。 振幅抑制装置还包括基于由差分电路计算的差分值来抑制输入信号的幅度的幅度抑制电路。

公开(公告)号：US08489037B2

公开(公告)日：2013-07-16

申请号：US12328950

申请日：2008-12-05

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

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

IPC分类号： H04B1/66

CPC分类号： H04L27/361 ,  H03F1/0211 ,  H03F3/24

摘要： A power amplifying apparatus has a bandwidth limitation process circuit to which an envelope signal included in a transmission signal is inputted, and which performs a bandwidth limitation process on the envelope signal, a variable power supply circuit for generating a power amplifier supply voltage based on a voltage control signal generated by the bandwidth limitation process circuit, and a power amplifier which is fed an input signal, and which is driven in accordance with the supply voltage from the variable power supply circuit.

摘要翻译： 功率放大装置具有带宽限制处理电路，输入发送信号中包含的包络信号，对包络信号进行带宽限制处理，可变电源电路基于 由带宽限制处理电路产生的电压控制信号，以及馈送输入信号并根据来自可变电源电路的电源电压驱动的功率放大器。

公开(公告)号：US20120275545A1

公开(公告)日：2012-11-01

申请号：US13420760

申请日：2012-03-15

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

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

IPC分类号： H04L25/49

CPC分类号： H04L27/368 ,  H03F1/3247 ,  H03F2201/3233

摘要： A distortion compensation apparatus for performing distortion compensation processing by applying the inverse properties of distortion properties of said power amplifier to a transmission signal to be input to a power amplifier, includes a plurality of distortion compensation coefficient storage units configured to store a plurality of distortion compensation coefficients used for said distortion compensation processing, an offset correction processing unit configured to subject said distortion compensation coefficient stored in each of said plurality of distortion compensation coefficient storage units to offset correction processing, and to generate distortion compensation coefficients in the case that said offset correction processing has not been performed, corresponding to said plurality of distortion compensation coefficient storage units, in a pseudo manner and a distortion compensation processing unit configured to subject said transmission signal to said distortion compensation processing based on said distortion compensation coefficients generated in a pseudo manner.

摘要翻译： 一种用于通过将所述功率放大器的失真特性的逆特性应用于要输入到功率放大器的发送信号来执行失真补偿处理的失真补偿装置，包括：多个失真补偿系数存储单元，被配置为存储多个失真补偿 用于所述失真补偿处理的系数;偏移校正处理单元，被配置为对存储在所述多个失真补偿系数存储单元中的每一个中的所述失真补偿系数进行偏移校正处理，并且在所述偏移校正的情况下产生失真补偿系数 以伪方式对应于所述多个失真补偿系数存储单元的处理没有被执行，以及失真补偿处理单元，被配置为使所述发送信号进行所述失真补偿 基于以伪方式生成的所述失真补偿系数的n处理。

公开(公告)号：US08102941B2

公开(公告)日：2012-01-24

申请号：US11822946

申请日：2007-07-11

申请人： Hajime Hamada ,  Tokuro Kubo ,  Kazuo Nagatani ,  Hiroyoshi Ishikawa ,  Nobukazu Fudaba

发明人： Hajime Hamada ,  Tokuro Kubo ,  Kazuo Nagatani ,  Hiroyoshi Ishikawa ,  Nobukazu Fudaba

IPC分类号： H04L25/03 ,  H04L25/49 ,  H04K1/02

CPC分类号： H04B1/0475

摘要： A peak suppression threshold value control unit receives an input of quality requirement information, such as a modulation system and coding ratio, from a baseband signal generation unit, determines a threshold value of a peak suppression unit based on the quality requirement information and outputs the threshold value to a peak suppression unit. The peak suppression unit applies a peak suppression control to a baseband signal input from a baseband signal generation unit based on the threshold value and outputs a signal (i.e., a peak suppression signal) applied by the peak suppression process.

摘要翻译： 峰值抑制阈值控制单元从基带信号生成单元接收诸如调制系统和编码比的质量要求信息的输入，基于质量要求信息确定峰值抑制单元的阈值，并输出阈值 值到峰值抑制单元。 峰值抑制单元基于阈值对从基带信号生成单元输入的基带信号进行峰值抑制控制，并输出通过峰值抑制处理施加的信号（即，峰值抑制信号）。

公开(公告)号：US08064529B2

公开(公告)日：2011-11-22

申请号：US11878588

申请日：2007-07-25

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

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

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L27/2614 ,  H03F1/32 ,  H03F3/19 ,  H04B1/0475 ,  H04L27/2623

摘要： In a configuration where systems C and D having different reception quality requirements are present, a peak suppressor generates a replica of a signal from system C combined together with a signal from system D before peak suppression. Based on the replica, system specific peak suppressing units respectively perform peak suppression on signals of each system according to the respective reception quality requirements of each system. A combining unit combines the peak-suppressed signals of each system. Hence, peak suppression on signals from systems requiring different reception qualities is performed at an appropriate degree according to each system.

摘要翻译： 在存在具有不同接收质量要求的系统C和D的配置中，峰值抑制器在峰值抑制之前产生与系统D的信号组合的来自系统C的信号的副本。 基于复制品，系统特定的峰值抑制单元根据每个系统的各个接收质量要求分别对每个系统的信号进行峰值抑制。 组合单元组合每个系统的峰值抑制信号。 因此，根据每个系统，在适当的程度上执行需要不同接收质量的系统的信号的峰值抑制。

公开(公告)号：US07839949B2

公开(公告)日：2010-11-23

申请号：US11482618

申请日：2006-07-07

申请人： Hajime Hamada ,  Tokuro Kubo ,  Kazuo Nagatani ,  Hiroyoshi Ishikawa ,  Nobukazu Fudaba

发明人： Hajime Hamada ,  Tokuro Kubo ,  Kazuo Nagatani ,  Hiroyoshi Ishikawa ,  Nobukazu Fudaba

IPC分类号： H04L25/03

CPC分类号： H04L27/2624

摘要： The present invention provides a peak suppression method, including a first step for detecting characteristic information of a peak part of a transmission signal; and a second step for changing a suppression method for the peak part based on the characteristic information.

摘要翻译： 本发明提供一种峰值抑制方法，包括：检测发送信号的峰值部分的特征信息的第一步骤; 以及基于特征信息改变峰值部分的抑制方法的第二步骤。

公开(公告)号：US20090190647A1

公开(公告)日：2009-07-30

申请号：US12333576

申请日：2008-12-12

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

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

IPC分类号： H04L27/01

CPC分类号： H03F1/3247 ,  H03F1/3241 ,  H03F2200/165 ,  H03F2200/451 ,  H03F2201/3233

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。