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    Waveform equalizer using a neural network
    1.
    发明授权
    Waveform equalizer using a neural network 失效
    波形均衡器使用神经网络

    公开(公告)号：US5272723A

    公开(公告)日：1993-12-21

    申请号：US691871

    申请日：1991-04-26

    申请人： Takashi Kimoto ,  Kazuo Asakawa ,  Kazuo Kawabata ,  Yasuyuki Oishi ,  Eisuke Fukuda ,  Takeshi Takano

    发明人： Takashi Kimoto ,  Kazuo Asakawa ,  Kazuo Kawabata ,  Yasuyuki Oishi ,  Eisuke Fukuda ,  Takeshi Takano

    IPC分类号： G06N3/04 ,  H04L25/03 ,  H03H7/30

    CPC分类号： H04L25/03165 ,  G06N3/04 ,  H04L2025/03464

    摘要： A waveform equalizer for equalizing a distorted signal, contains a sampling unit, a time series generating unit, and an equalization neural network unit. The sampling unit samples the level of a distorted signal at a predetermined rate. The time series generating unit serially receives the sampled level and outputs in parallel a predetermined number of the levels which have been last received. The equalization neural network unit receives the outputs of the time series generating unit, and generates an equalized signal of the distorted signal based on the outputs of the time series generating unit using a set of equalization network weights which are preset therein. The waveform equalizer may further contain a distortion characteristic detecting unit, an equalization network weight holding unit, and a selector unit. The distortion characteristic detecting unit detects a distortion characteristic of the distorted signal. The equalization network weight holding unit holds a plurality of sets of equalization network weights each for being set in the equalization neural network unit. The selector unit selects one of the plurality of sets of equalization network weights according to the distortion characteristic which is detected in the distortion characteristic detecting unit, and supplies the selected set in the equalization neural network unit to set the selected set therein.

    Amplifier having distortion compensation and base station for radio communication using the same
    2.
    发明授权
    Amplifier having distortion compensation and base station for radio communication using the same 失效
    具有失真补偿的放大器和使用其的无线电通信基站

    公开(公告)号：US5870668A

    公开(公告)日：1999-02-09

    申请号：US688443

    申请日：1996-07-30

    申请人： Takeshi Takano ,  Yasuyuki Oishi ,  Eisuke Fukuda ,  Hideto Furukawa ,  Kazuo Nagatani

    发明人： Takeshi Takano ,  Yasuyuki Oishi ,  Eisuke Fukuda ,  Hideto Furukawa ,  Kazuo Nagatani

    IPC分类号： H03D7/16 ,  H03F1/32 ,  H04B7/0005

    CPC分类号： H03D7/168 ,  H03F1/3241 ,  H03F2200/372

    摘要： A amplifier having distortion compensation is employed as a power amplifier for amplifying a linear modulated signal or a low noise amplifier for amplifying a linear modulated signal. The amplifier having distortion compenssation includes an amplifier circuit for amplifying an input signal; an error detecting circuit for obtaining an error signal between the input signal to and an output signal from the amplifier circuit; a coefficient generating circuit for generating compensation coefficients to compensate distortion components of characteristics of the amplifier circuit, based on the error signal according to an adaptive type algorithm; a first outputting circuit for outputting a generated compensation coefficient corresponding to the input signal; and a multiplying circuit for multiplying the generated compensation coefficient to the input signal and inputting a multiplied coefficient to the amplifier circuit.

    摘要翻译： 使用具有失真补偿的放大器作为用于放大线性调制信号的功率放大器或用于放大线性调制信号的低噪声放大器。 具有失真补偿的放大器包括用于放大输入信号的放大器电路; 用于获得来自放大器电路的输入信号与输出信号之间的误差信号的误差检测电路; 系数产生电路，用于根据自适应型算法产生补偿系数以补偿放大器电路的特性的失真分量; 第一输出电路，用于输出与输入信号对应的产生的补偿系数; 以及乘法电路，用于将所生成的补偿系数与输入信号相乘，并将乘法系数输入到放大器电路。

    Power amplifier with distortion compensation circuit
    3.
    发明授权
    Power amplifier with distortion compensation circuit 有权
    具有失真补偿电路的功率放大器

    公开(公告)号：US07663436B2

    公开(公告)日：2010-02-16

    申请号：US12000616

    申请日：2007-12-14

    申请人： Takeshi Takano ,  Yasuyuki Oishi ,  Toru Maniwa

    发明人： Takeshi Takano ,  Yasuyuki Oishi ,  Toru Maniwa

    IPC分类号： H03F1/26

    CPC分类号： H03F1/3247 ,  H03F1/30 ,  H03F1/3282 ,  H03F2201/3209 ,  H03F2201/3212 ,  H03F2201/3224 ,  H03F2201/3233

    摘要： A power amplifier negates a memory effect and is applied a linearizer using a digital predistortion system even in an inexpensive device. The power amplifier compares an input signal power against a sampled component of an output power, and provides predistortion to the input signal power so as to minimize a difference as a result of the comparison. The power amplifier comprises a gain lookup table storing a gain coefficient value corresponding to a temperature address determined for an input power; a phase lookup table storing a phase coefficient value corresponding to the temperature address determined for the input power; a transversal filter, which is input with the input power, and which outputs the temperature address; and a coefficient multiplier modulating the input signal using a gain coefficient value and a phase coefficient value, which correspond to the temperature address and which are read out from the gain coefficient lookup table and the phase lookup table.

    摘要翻译： 功率放大器消除了记忆效应，并且即使在廉价的设备中也使用数字预失真系统应用线性化。 功率放大器将输入信号功率与输出功率的采样分量进行比较，并且为输入信号功率提供预失真，以便作为比较的结果使差异最小化。 功率放大器包括：增益查找表，其存储对应于为输入功率确定的温度地址的增益系数值; 相位查找表，存储与为输入功率确定的温度地址对应的相位系数值; 横向滤波器，其输入有输入功率，并输出温度地址; 以及系数乘法器，其使用与所述温度地址对应并且从所述增益系数查找表和所述相位查找表读出的增益系数值和相位系数值来调制所述输入信号。

    Reader/writer and RFID system
    4.
    发明申请
    Reader/writer and RFID system 审中-公开
    读写器和RFID系统

    公开(公告)号：US20060038659A1

    公开(公告)日：2006-02-23

    申请号：US11130244

    申请日：2005-05-17

    申请人： Takeshi Takano ,  Tomohiko Taniguchi ,  Yasuyuki Oishi ,  Yoshinori Tanaka ,  Teruhisa Ninomiya ,  Nobuhisa Aoki ,  Yuichi Nakanishi

    发明人： Takeshi Takano ,  Tomohiko Taniguchi ,  Yasuyuki Oishi ,  Yoshinori Tanaka ,  Teruhisa Ninomiya ,  Nobuhisa Aoki ,  Yuichi Nakanishi

    IPC分类号： H04Q5/22

    CPC分类号： G06K7/10356 ,  G06K7/0008

    摘要： A system establishes synchronicity of transmission and receiving for each reader/writer of an RF tag independently without obtaining synchronization of the reader/writers by means of an unspecified number of control terminals is desired as a reader/writer system. A reader/writer comprises a transmitter operable to transmit an interrogation signal to an RF tag, and a receiver operable to receive a response signal from an RF tag, wherein the transmitter is operable to transmit an interrogation signal based on a synchronization signal received from another reader/writer.

    摘要翻译： 作为读/写系统，系统需要独立地建立RF标签的每个读/写器的发送和接收的同步性，而无需通过未指定数量的控制终端获得读/写器的同步。 读写器包括可操作以将讯号信号发射到RF标签的发射器和可操作以从RF标签接收响应信号的接收器，其中发射器可操作以基于从另一个接收的同步信号发送询问信号 读者/作家

    Control unit and a control method
    5.
    发明申请
    Control unit and a control method 失效
    控制单元和控制方式

    公开(公告)号：US20050146387A1

    公开(公告)日：2005-07-07

    申请号：US11044628

    申请日：2005-01-27

    申请人： Takeshi Toda ,  Takeshi Takano ,  Yuuta Nakaya ,  Yasuyuki Oishi

    发明人： Takeshi Toda ,  Takeshi Takano ,  Yuuta Nakaya ,  Yasuyuki Oishi

    IPC分类号： H01Q3/26 ,  H01Q3/36 ,  H01Q9/04 ,  H03L1/00

    CPC分类号： H01Q3/26 ,  H01Q3/2605 ,  H01Q3/36 ,  H01Q9/0442 ,  H04B1/18

    摘要： A control unit and a control method are disclosed. First and second changing units change impedances of two or more first and second components within predetermined first and second ranges, respectively, the first and the second components affecting an output signal. An evaluation function value calculating unit calculates an evaluation function value that is dependent on the impedances of the first and the second components. A gradient vector calculating unit calculates a gradient vector based on the difference between the evaluation function values before and after the impedance change of the second components. Based on the gradient vector, impedance of each of the first components is changed such that the evaluation function value takes a desired value.

    摘要翻译： 公开了一种控制单元和控制方法。 第一和第二改变单元分别在预定的第一和第二范围内改变两个或更多个第一和第二分量的阻抗，第一和第二分量影响输出信号。 评估函数值计算单元计算依赖于第一和第二分量的阻抗的评估函数值。 梯度矢量计算单元基于第二分量的阻抗变化前后的评价函数值之差来计算梯度矢量。 基于梯度矢量，改变每个第一分量的阻抗，使得评估函数值取所需值。

    Radio apparatus and offset compensating method
    6.
    发明授权
    Radio apparatus and offset compensating method 失效
    无线电设备和偏移补偿方法

    公开(公告)号：US6081698A

    公开(公告)日：2000-06-27

    申请号：US192219

    申请日：1998-11-16

    申请人： Yukihiro Moriyama ,  Takeshi Takano ,  Yasuyuki Oishi ,  Yoshiya Ohsaki ,  Yuji Kaneko ,  Koji Takata ,  Masaru Kabashima

    发明人： Yukihiro Moriyama ,  Takeshi Takano ,  Yasuyuki Oishi ,  Yoshiya Ohsaki ,  Yuji Kaneko ,  Koji Takata ,  Masaru Kabashima

    IPC分类号： H01Q3/26 ,  H01Q11/12 ,  H03C3/40 ,  H04B1/04 ,  H04L27/36

    CPC分类号： H04L27/368 ,  H01Q11/12 ,  H01Q3/267 ,  H03C3/406 ,  H04B2001/0425

    摘要： Disclosed is a radio apparatus in which modulating signals (I, Q signals) from an arithmetic/control unit are converted to analog signals, which are then applied to an orthogonal modulator. A modulated wave for transmission, which has been produced by orthogonally modulating a reference carrier wave by the modulating signals, is demodulated by the orthogonal detector. The arithmetic/control unit compares the modulating signals and the demodulated signals and, based upon the comparison, updates distortion compensation coefficients and applies pre-distortion processing to the modulating signal using the distortion compensation coefficients. Leakage carrier produced due to offset of the orthogonal modulator is detected and the arithmetic/control unit adjusts the level of the modulating signals or shifts the phase of the reference carrier wave in such a manner that the leakage carrier (offset) becomes zero.

    摘要翻译： 公开了一种无线电设备，其中将来自算术/控制单元的调制信号（I，Q信号）转换为模拟信号，然后将其应用于正交调制器。 通过正交检波器解调通过调制信号正交调制参考载波产生的用于传输的调制波。 算术/控制单元比较调制信号和解调信号，并且基于比较，更新失真补偿系数，并使用失真补偿系数对调制信号应用预失真处理。 检测由于正交调制器的偏移而产生的泄漏载波，并且算术/控制单元调节调制信号的电平或以使得泄漏载波（偏移）变为零的方式偏移参考载波的相位。

    Control unit and a control method
    7.
    发明授权
    Control unit and a control method 失效
    控制单元和控制方式

    公开(公告)号：US07512384B2

    公开(公告)日：2009-03-31

    申请号：US11044628

    申请日：2005-01-27

    申请人： Takeshi Toda ,  Takeshi Takano ,  Yuuta Nakaya ,  Yasuyuki Oishi

    发明人： Takeshi Toda ,  Takeshi Takano ,  Yuuta Nakaya ,  Yasuyuki Oishi

    IPC分类号： H03C1/52

    CPC分类号： H01Q3/26 ,  H01Q3/2605 ,  H01Q3/36 ,  H01Q9/0442 ,  H04B1/18

    摘要： A control unit and a control method are disclosed. First and second changing units change impedances of two or more first and second components within predetermined first and second ranges, respectively, the first and the second components affecting an output signal. An evaluation function value calculating unit calculates an evaluation function value that is dependent on the impedances of the first and the second components. A gradient vector calculating unit calculates a gradient vector based on the difference between the evaluation function values before and after the impedance change of the second components. Based on the gradient vector, impedance of each of the first components is changed such that the evaluation function value takes a desired value.

    摘要翻译： 公开了一种控制单元和控制方法。 第一和第二改变单元分别在预定的第一和第二范围内改变两个或更多个第一和第二分量的阻抗，第一和第二分量影响输出信号。 评估函数值计算单元计算依赖于第一和第二分量的阻抗的评估函数值。 梯度矢量计算单元基于第二分量的阻抗变化前后的评价函数值之差来计算梯度矢量。 基于梯度矢量，改变每个第一分量的阻抗，使得评估函数值取所需值。