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    Radio communication apparatus
    21.
    发明申请
    Radio communication apparatus 失效
    无线通信装置

    公开(公告)号：US20060105715A1

    公开(公告)日：2006-05-18

    申请号：US11085080

    申请日：2005-03-22

    Applicant: Mayumi Kodani ,  Toshiaki Funakubo

    Inventor： Mayumi Kodani ,  Toshiaki Funakubo

    IPC: H04B1/00 ,  H04B15/00

    CPC classification number: H04L27/2637 ,  H03F1/32 ,  H03F1/3247 ,  H03F1/3294 ,  H03F2200/111 ,  H03F2201/3206 ,  H04B1/0475 ,  H04B1/0483 ,  H04L27/368

    Abstract: A plurality of carriers are divided into two systems, one on a low-frequency side and the other on a high-frequency side, a transmitting unit that executes processing for transmitting a signal wirelessly is provided in each of the two systems, and output lines of transmit amplifiers of each of the transmitting units are directly coupled and input to an antenna. A feedback unit on the low-frequency side feeds a low-frequency carrier signal portion contained in the transmit signal back to a distortion compensating unit on the low-frequency side, and a feedback unit on the high-frequency side feeds a high-frequency carrier signal portion contained in the transmit signal back to a distortion compensating unit on the high-frequency side. The distortion compensating units compensate for distortion on the low- and high-frequency sides.

    Abstract translation: 多个载波被分成两个系统，一个在低频侧，另一个在高频侧，在两个系统中的每个系统中设置执行无线发送信号的处理的发送单元，输出线 每个发射单元的发射放大器直接耦合并输入到天线。 低频侧的反馈单元将包含在发送信号中的低频载波信号部分反馈给低频侧的失真补偿单元，高频侧的反馈单元将高频 包含在发送信号中的载波信号部分返回到高频侧的失真补偿单元。 失真补偿单元补偿低频和高频侧的失真。

    Distortion reducing circuit
    22.
    发明授权
    Distortion reducing circuit 失效
    失真减少电路

    公开(公告)号：US06753728B2

    公开(公告)日：2004-06-22

    申请号：US10153630

    申请日：2002-05-24

    Applicant: Yoichi Okubo ,  Kiyoshi Funada ,  Masaki Suto ,  Masato Horaguchi ,  Toshio Takada ,  Naoki Hongo

    Inventor： Yoichi Okubo ,  Kiyoshi Funada ,  Masaki Suto ,  Masato Horaguchi ,  Toshio Takada ,  Naoki Hongo

    IPC: H03F126

    CPC classification number: H03F1/3229 ,  H03F1/32 ,  H03F1/3247 ,  H03F2200/102 ,  H03F2201/3206

    Abstract: A distortion reducing circuit compensates an upper side third-order distortion and a lower side third-order distortion produced by an amplifier for amplifying a fundamental signal including multiple frequency components. The distortion reducing circuit includes a second harmonic reflection coefficient regulation circuit, installed at an output side of the amplifier, for regulating reflection coefficients for multiple frequency components included in a second harmonic signal to have a constant value.

    Abstract translation: 失真减小电路补偿由用于放大包括多个频率分量的基本信号的放大器产生的上侧三阶失真和下侧三次失真。 失真减小电路包括安装在放大器的输出侧的二次谐波反射系数调节电路，用于调节包括​​在二次谐波信号中的多个频率分量的反射系数以具有恒定值。

    Distortion canceling circuit
    23.
    发明申请
    Distortion canceling circuit 失效
    失真消除电路

    公开(公告)号：US20020180523A1

    公开(公告)日：2002-12-05

    申请号：US10131131

    申请日：2002-04-25

    Applicant: Hitachi Kokusai Electric Inc.

    Inventor： Yoichi Okubo ,  Kiyoshi Funada ,  Masaki Suto ,  Masato Horaguchi ,  Toshio Takada ,  Naoki Hongo

    IPC: H03F001/26

    CPC classification number: H03F1/3247 ,  H03F1/3205 ,  H03F1/3282 ,  H03F1/3288 ,  H03F2200/102 ,  H03F2201/3206 ,  H03F2201/3233

    Abstract: There is provided a distortion canceling circuit for reducing an unbalance between a higher and a lower 3rd order distortion at frequencies of (2nullf2nullf1) and (2nullf1nullf2), respectively, the distortions being generated by an amplifier which amplifies an input signal having at least two frequency components, i.e., f1 and f2. Phase modulation control means supply a control signal, which has a difference frequency of (f2nullf1), to phase modulation means, the control signal being generated based on the amplified input signal outputted from the amplifier. The phase modulation means performs phase modulation on the amplified input signal based on the supplied control signal to thereby generate a higher and a lower side-band signal having frequencies of (2nullf2nullf1) and (2nullf1nullf2), respectively, each of which has an identical amplitude and a phase difference of 180null with respect to each other. The distortion canceling circuit reduces the unbalance by using the side-band signals.

    Abstract translation: 提供了一种用于减小在（2.f2-f1）和（2.f1-f2）频率处的较高和较低三阶失真之间的不平衡的失真消除电路，失真是由放大器 具有至少两个频率分量的输入信号，即f1和f2。 相位调制控制装置将具有差分频率（f2-f1）的控制信号提供给相位调制装置，该控制信号是根据从放大器输出的放大的输入信号产生的。 相位调制装置基于所提供的控制信号对放大的输入信号执行相位调制，从而分别产生频率为（2.f2-f1）和（2.f1-f2）的较高和较低的边带信号 ，其中的每一个具有相同的振幅和相对于彼此为180°的相位差。 失真消除电路通过使用边带信号来减少不平衡。

    Transmitting a signal from a power amplifier
    28.
    发明授权
    Transmitting a signal from a power amplifier 有权
    从功率放大器发送信号

    公开(公告)号：US08385466B2

    公开(公告)日：2013-02-26

    申请号：US13222471

    申请日：2011-08-31

    Applicant: Stephen Felix ,  Steve Allpress

    Inventor： Stephen Felix ,  Steve Allpress

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

    CPC classification number: H04L27/367 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2201/3206 ,  H04B1/707 ,  H04L27/2614

    Abstract: A method for limiting peak-to-average power of a signal transmitted from a power amplifier. The method comprises: applying a pulse-shape filter to a first signal, thereby generating a second signal being a filtered version of the first signal; and outputting the second signal for transmission from a power amplifier. The method further comprises: applying each of a plurality of predictor filters to a respective instance of the first signal, each predictor filter approximating the application of the pulse-shape filter to the first signal based on a different respective set of filter coefficients, and each thereby generating a respective third signal. The method also further comprises determining an indicator of amplitude of each of the third signals, selecting the indicator corresponding to the largest of those amplitudes, generating a modifier based on the selected indicator, and using the modifier to limit the first signal prior to applying the pulse-shape filter.

    Abstract translation: 一种用于限制从功率放大器发送的信号的峰值与平均功率的方法。 该方法包括：对第一信号施加脉冲形滤波器，从而产生作为第一信号的滤波版本的第二信号; 并从功率放大器输出用于传输的第二信号。 该方法还包括：将多个预测滤波器中的每一个应用于第一信号的相应实例，每个预测器滤波器基于不同的相应滤波器系数集合逼近脉冲形滤波器对第一信号的应用，并且每个 从而产生相应的第三信号。 该方法还包括确定每个第三信号的幅度指标，选择对应于最大幅度的指示符，基于所选择的指示符生成修改符，并且使用修饰符来限制第一信号， 脉冲形滤波器。

    TRANSMITTING A SIGNAL FROM A POWER AMPLIFIER
    29.
    发明申请
    TRANSMITTING A SIGNAL FROM A POWER AMPLIFIER 有权
    从功率放大器传输信号

    公开(公告)号：US20120057650A1

    公开(公告)日：2012-03-08

    申请号：US13222471

    申请日：2011-08-31

    Applicant: Stephen Felix ,  Steve Allpress

    Inventor： Stephen Felix ,  Steve Allpress

    IPC: H04L25/03

    CPC classification number: H04L27/367 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2201/3206 ,  H04B1/707 ,  H04L27/2614

    Abstract: A method for limiting peak-to-average power of a signal transmitted from a power amplifier. The method comprises: applying a pulse-shape filter to a first signal, thereby generating a second signal being a filtered version of the first signal; and outputting the second signal for transmission from a power amplifier. The method further comprises: applying each of a plurality of predictor filters to a respective instance of the first signal, each predictor filter approximating the application of the pulse-shape filter to the first signal based on a different respective set of filter coefficients, and each thereby generating a respective third signal. The method also further comprises determining an indicator of amplitude of each of the third signals, selecting the indicator corresponding to the largest of those amplitudes, generating a modifier based on the selected indicator, and using the modifier to limit the first signal prior to applying the pulse-shape filter.

    Abstract translation: 一种用于限制从功率放大器发送的信号的峰值与平均功率的方法。 该方法包括：对第一信号施加脉冲形滤波器，从而产生作为第一信号的滤波版本的第二信号; 并从功率放大器输出用于传输的第二信号。 该方法还包括：将多个预测滤波器中的每一个应用于第一信号的相应实例，每个预测器滤波器基于不同的相应滤波器系数集合近似将脉冲形滤波器应用于第一信号，并且每个 从而产生相应的第三信号。 该方法还包括确定每个第三信号的幅度指标，选择对应于最大幅度的指示符，基于所选择的指示符生成修改符，并且使用修饰符来限制第一信号， 脉冲形滤波器。

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