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    VoIP server apparatus and method for maintaining software in VoIP server apparatus
    5.
    发明授权
    VoIP server apparatus and method for maintaining software in VoIP server apparatus 有权
    用于在VoIP服务器装置中维护软件的VoIP服务器装置和方法

    公开(公告)号：US08264989B2

    公开(公告)日：2012-09-11

    申请号：US11926633

    申请日：2007-10-29

    申请人： Yasunori Suzuki

    发明人： Yasunori Suzuki

    IPC分类号： H04L12/16 ,  H04L12/66 ,  H04L12/56 ,  G06F9/44 ,  G06F17/30 ,  G06F3/01 ,  G06F9/45 ,  G06F17/00 ,  G06F7/00

    CPC分类号： H04L29/12783 ,  G06F8/656 ,  H04L61/35 ,  H04L65/80 ,  H04L67/34

    摘要： Disclosed are a VoIP server apparatus and a method for maintaining VoIP server software in the server apparatus which transmits/receives a packet to/from an IP terminal via network to provide VoIP service. The method includes: assigning a virtual IP address to the server apparatus; associating a first IP address used by first VoIP server software with the virtual IP address; activating second VoIP server software while the first VoIP server software receives a packet addressed to the virtual IP address and provides VoIP service; changing the association of the virtual IP address with the first IP address to association of the virtual IP address with a second IP address used by the second VoIP server software; receiving a packet addressed to the virtual IP address by the second VoIP server software; and changing VoIP service by the first VoIP server software to VoIP service by the second VoIP server software.

    摘要翻译： 公开了一种在服务器装置中维护VoIP服务器软件的VoIP服务器装置和方法，其经由网络经由网络向IP终端发送/接收分组以提供VoIP服务。 该方法包括：将虚拟IP地址分配给服务器设备; 将第一VoIP服务器软件使用的第一IP地址与虚拟IP地址相关联; 激活第二个VoIP服务器软件，同时第一个VoIP服务器软件接收到寻址到虚拟IP地址的数据包并提供VoIP服务; 将虚拟IP地址与第一IP地址的关联改变为虚拟IP地址与第二VoIP服务器软件使用的第二IP地址的关联; 通过第二VoIP服务器软件接收寻址到虚拟IP地址的分组; 并通过第二个VoIP服务器软件将第一个VoIP服务器软件的VoIP服务改为VoIP服务。

    Power series predistorter and control method thereof
    6.
    发明授权
    Power series predistorter and control method thereof 有权
    电力系列预失真器及其控制方法

    公开(公告)号：US07948311B2

    公开(公告)日：2011-05-24

    申请号：US12555420

    申请日：2009-09-08

    申请人： Yasunori Suzuki ,  Shoichi Narahashi ,  Junya Ohkawara

    发明人： Yasunori Suzuki ,  Shoichi Narahashi ,  Junya Ohkawara

    IPC分类号： H03F1/26

    CPC分类号： H03F1/3247 ,  H03F1/3258

    摘要： A power series predistorter of the present invention includes a delay path for delaying a signal, a distortion generation path having an N-th order distortion generator and a vector adjuster, a divider for dividing an input signal between the delay path and the distortion generation path, a combiner for combining the output signal of the delay path and the output signal of the distortion generation path, and a controller for controlling the vector adjuster. The controller includes a setting unit, a distortion component measurement unit, a minimum condition calculation unit, and a recording unit. The setting unit specifies the phase or amplitude value of the vector adjuster. The distortion component measurement unit measures the distortion component of a power amplifier. The minimum condition calculation unit obtains a phase or amplitude value that minimizes the distortion component by function approximation, using the magnitude of the distortion components corresponding to three or more phase or amplitude values specified for sampling by the setting unit.

    摘要翻译： 本发明的功率系列预失真器包括用于延迟信号的延迟路径，具有N阶失真发生器和向量调整器的失真产生路径，用于对延迟路径和失真产生路径之间的输入信号进行分频的分频器 ，用于组合延迟路径的输出信号和失真产生路径的输出信号的组合器，以及用于控制矢量调节器的控制器。 控制器包括设置单元，失真分量测量单元，最小条件计算单元和记录单元。 设定单位指定矢量调节器的相位或幅度值。 失真分量测量单元测量功率放大器的失真分量。 最小条件计算单元使用通过设置单元进行采样指定的三个或更多个相位或幅度值的对应于失真分量的幅度，通过函数近似获得使失真分量最小化的相位或幅度值。

    Feedforward amplifier and control method thereof
    7.
    发明授权
    Feedforward amplifier and control method thereof 有权
    前馈放大器及其控制方法

    公开(公告)号：US07902922B2

    公开(公告)日：2011-03-08

    申请号：US12372969

    申请日：2009-02-18

    申请人： Yasunori Suzuki ,  Shoichi Narahashi

    发明人： Yasunori Suzuki ,  Shoichi Narahashi

    IPC分类号： H03F1/00

    CPC分类号： H03F1/3229 ,  H03F1/0261 ,  H03F3/24 ,  H03F2200/18 ,  H03F2200/451

    摘要： In a feedforward amplifier (200) including a signal cancellation circuit (10) and a distortion eliminating circuit (20), a harmonic reaction amplifier (130) is used as a main amplifier of the signal cancellation circuit. A controller (43) obtains an adjacent channel leakage power ratio (ACLR) and a power efficiency from an output of the feedforward amplifier (200) and controls the gate bias voltages of two transistors (33A and 33B) of the harmonic reaction amplifier (130) to maximize the power efficiency under the condition that the ACLR is less than or equal to a reference value.

    摘要翻译： 在包括信号消除电路（10）和失真消除电路（20）的前馈放大器（200）中，使用谐波反作用放大器（130）作为信号消除电路的主放大器。 控制器（43）从前馈放大器（200）的输出端获得相邻信道泄漏功率比（ACLR）和功率效率，并控制谐波反应放大器（130）的两个晶体管（33A和33B）的栅极偏置电压 ）以在ACLR小于或等于参考值的条件下最大化功率效率。

    POWER SERIES DIGITAL PREDISTORTER AND DISTORTION COMPENSATION CONTROL METHOD THEREFOR
    8.
    发明申请
    POWER SERIES DIGITAL PREDISTORTER AND DISTORTION COMPENSATION CONTROL METHOD THEREFOR 有权
    电力系列数字预测器及其失真补偿控制方法

    公开(公告)号：US20110050339A1

    公开(公告)日：2011-03-03

    申请号：US12868063

    申请日：2010-08-25

    申请人： Junya OHKAWARA ,  Yasunori Suzuki ,  Shoichi Narahashi

    发明人： Junya OHKAWARA ,  Yasunori Suzuki ,  Shoichi Narahashi

    IPC分类号： H03F1/26

    CPC分类号： H03F1/3247 ,  H03F1/3294

    摘要： A power series digital predistorter and a distortion compensation control method for the power series digital predistorter are capable of adjusting the coefficients of a frequency characteristic compensator at high speed. A controller in the power series digital predistorter collectively sets adjustment amounts for the phases in bands in an N-th order frequency characteristic compensator; collectively sets adjustment amounts for the amplitudes in the bands in the N-th order frequency characteristic compensator; determines whether an index indicating the degree of cancellation of a distortion component generated in a power amplifier satisfies a preset condition; and, if the index does not satisfy the condition, performs control such that the adjustment amounts for the phases and the adjustment amounts for the amplitudes are set again.

    摘要翻译： 功率系列数字预失真器和功率级数字预失真器的失真补偿控制方法能够高速调整频率特性补偿器的系数。 功率系列数字预失真器中的控制器共同设定N阶频率特性补偿器中的频带中的相位的调整量; 共同设定N阶频率特性补偿器中的频带中的振幅的调整量; 确定指示在功率放大器中产生的失真分量的消除程度的指标是否满足预设条件; 并且如果索引不满足条件，则进行控制，使得相位的调整量和振幅的调整量再次被设定。

    POWER SERIES DIGITAL PREDISTORTER AND CONTROL METHOD THEREFOR
    9.
    发明申请
    POWER SERIES DIGITAL PREDISTORTER AND CONTROL METHOD THEREFOR 有权
    电力系列数字预测器及其控制方法

    公开(公告)号：US20100295612A1

    公开(公告)日：2010-11-25

    申请号：US12782168

    申请日：2010-05-18

    申请人： Junya OHKAWARA ,  Yasunori Suzuki ,  Shoichi Narahashi

    发明人： Junya OHKAWARA ,  Yasunori Suzuki ,  Shoichi Narahashi

    IPC分类号： H03F1/26

    CPC分类号： H03F1/3247 ,  H03F1/3258

    摘要： A power series digital predistorter includes a combiner which combines an output from a linear transmission path with an output from an odd-order distortion generating path, an analog-to-digital converter which converts a feedback signal from an output of a power amplifier to a digital feedback signal, an odd-order distortion vector control part which controls vector adjustment performed by an odd-order distortion vector adjusting part in the odd-order distortion generating path, a cancellation signal generating part which generates a cancellation signal from an input transmission signal, a combiner which is inserted in a feedback signal path and which combines the cancellation signal with a signal from the feedback signal path, and a cancellation signal control part which controls the cancellation signal generating part so that the cancellation signal suppresses a main signal component in the feedback signal at the combiner.

    摘要翻译： 功率系列数字预失真器包括组合器，其将来自线性传输路径的输出与来自奇数阶失真产生路径的输出组合，模数转换器，其将来自功率放大器的输出的反馈信号转换为 数字反馈信号，奇数失真矢量控制部，其控制由奇数失真生成路径中的奇数阶失真矢量调整部执行的矢量调整;消除信号生成部，其从输入的发送信号生成消除信号 ，组合器，其插入在反馈信号路径中并将抵消信号与来自反馈信号路径的信号组合;以及消除信号控制部分，其控制消除信号产生部分，使得抵消信号抑制主信号分量 组合器的反馈信号。

    Cryogenic receiving amplifier and amplifying method
    10.
    发明授权
    Cryogenic receiving amplifier and amplifying method 失效
    低温接收放大器和放大方法

    公开(公告)号：US07795965B2

    公开(公告)日：2010-09-14

    申请号：US12035797

    申请日：2008-02-22

    申请人： Yasunori Suzuki ,  Shoichi Narahashi

    发明人： Yasunori Suzuki ,  Shoichi Narahashi

    IPC分类号： H03F17/00

    CPC分类号： H03F3/193

    摘要： The present invention discloses a cryogenic receiving amplifier using a gallium nitride high electron mobility transistor (GaN HEMT) as an amplifying device in a cryogenic temperature environment. The cryogenic receiving amplifier includes an input matching circuit which makes an impedance matching between a gate of the amplifying device and an outside of an input terminal, a gate biasing circuit which applies a DC voltage to the gate of the amplifying device, an output matching circuit which makes an impedance matching between a drain of the amplifying device and an outside of an output terminal, and a drain biasing circuit which applies a DC voltage to the drain of the amplifying device. The cooled temperature is preferably set to 150 K or below, and the GaN HEMT may be illuminated with light of a blue LED.

    摘要翻译： 本发明公开了一种在低温环境中使用氮化镓高电子迁移率晶体管（GaN HEMT）作为放大装置的低温接收放大器。 低温接收放大器包括：输入匹配电路，其在放大装置的栅极与输入端子的外部之间形成阻抗匹配;栅极偏置电路，对直流放大装置的栅极施加直流电压;输出匹配电路 这使得放大装置的漏极和输出端子的外部之间的阻抗匹配，以及向放大装置的漏极施加DC电压的漏极偏置电路。 冷却的温度优选设定为150K以下，并且GaN HEMT可以用蓝色LED的光照射。