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.

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。

公开(公告)号：US08126495B2

公开(公告)日：2012-02-28

申请号：US12257609

申请日：2008-10-24

申请人： Jianming Wu ,  Mitsuhiro Azuma ,  Tomohiko Taniguchi ,  Eisuke Fukuda

发明人： Jianming Wu ,  Mitsuhiro Azuma ,  Tomohiko Taniguchi ,  Eisuke Fukuda

IPC分类号： H04B7/00

CPC分类号： H04W52/143 ,  H04W16/10 ,  H04W16/12 ,  H04W52/241 ,  H04W52/243 ,  H04W52/38

摘要： Node-B transmits a power profile of each frequency of transmission data as a step function to a UE. Each UE measures the amount of interference of a received signal, evaluates SINR over the entire frequency band with the power of the received signal, and transmits the evaluation result to Node-B. Node-B evaluates the interference profile in Node-B from the information about the SINR transmitted from the UE and the power of the transmission signal, and determines the frequency profile of the power of the signal transmitted to the UE.

摘要翻译： 节点B向UE发送作为步进功能的每个发送数据频率的功率曲线。 每个UE测量接收信号的干扰量，用接收信号的功率在整个频带上评估SINR，并将评估结果发送到节点B。 节点B从关于从UE发送的SINR的信息和发送信号的功率的信息中评估节点B中的干扰简档，并且确定发送给UE的信号的功率的频率分布。

公开(公告)号：US4633484A

公开(公告)日：1986-12-30

申请号：US674314

申请日：1984-11-23

申请人： Yukio Takeda ,  Hiroshi Nakamura ,  Eisuke Fukuda

发明人： Yukio Takeda ,  Hiroshi Nakamura ,  Eisuke Fukuda

IPC分类号： H04J11/00 ,  H04L27/06 ,  H04L27/38 ,  H04B1/68 ,  H04B15/00

CPC分类号： H04L27/3818

摘要： A receiver unit in a radio communication system in which a transmitter unit outputs transmission data, modulated in accordance with a multilevel QAM method and containing a leakage carrier by addition of a DC offset signal to either one of the quadrature components forming the transmission data, to the receiver unit through a transmission line, including: means for receiving the transmission data; means for branching a signal received at the transmission data receiving means into first and second signal components forming the multilevel QAM data, each including the leakage carrier having a phase difference of .pi./2 radian; first channel means for demodulating the first branched signal component and including a first synchronous detection circuit and a first discriminator; second channel means for demodulating the second branched signal component and including a second synchronous detection circuit and a second discriminator; and means for recovering the carrier including a control circuit, for cancelling a noise component contained in the output signal from either one of the first and second synchronous detection circuits and for providing only a DC component representing a phase difference between a leakage carrier and a reference carrier, and a phase-locked loop (PLL) circuit, for controlling the phase difference to zero and for providing phase-locked leakage carriers to the reference carriers, having a phase difference of .pi./2 radian, to the first and second synchronous detection circuits.

摘要翻译： 一种无线电通信系统中的接收机单元，其中发射机单元输出根据多电平QAM方法调制并且通过将DC偏移信号加到构成传输数据的正交分量中的任何一个而包含泄漏载波的传输数据， 所述接收机单元通过传输线路，包括：用于接收所述传输数据的装置; 用于将在所述发送数据接收装置接收到的信号分支成形成所述多级QAM数据的第一和第二信号分量的装置，每个包括所述泄漏载波具有π/ 2弧度的相位差; 用于解调第一分支信号分量并包括第一同步检测电路和第一鉴频器的第一信道装置; 用于解调第二分支信号分量并包括第二同步检测电路和第二鉴频器的第二信道装置; 以及用于恢复包括控制电路的载体的装置，用于抵消来自第一和第二同步检测电路中的任一个的输出信号中包含的噪声分量，并且仅提供表示泄漏载体和参考的相位差的DC分量 载波和锁相环（PLL）电路，用于将相位差控制为零，并且用于向具有π/ 2弧度的相位差的参考载波提供锁相泄漏载波与第一和第二同步检测 电路。

公开(公告)号：US08792546B2

公开(公告)日：2014-07-29

申请号：US13529178

申请日：2012-06-21

申请人： Kazuo Nagatani ,  Eisuke Fukuda ,  Yasushi Yamao

发明人： Kazuo Nagatani ,  Eisuke Fukuda ,  Yasushi Yamao

IPC分类号： H04L27/36

CPC分类号： H03F3/24 ,  H03F1/0227 ,  H04L27/3411 ,  H04L27/361

摘要： A transmission circuit comprises a Σ−Δ modulator to perform Σ−Δ modulation of an amplitude modulation component of a modulation signal and to output a pulse width modulation signal, an angle modulator to generate an angle modulation component signal of a signal obtained by multiplying the modulation signal by a transmission output control coefficient corresponding to a transmission output in a power amplifier, and a multiplier to multiply the pulse width modulation signal by the angle modulation component signal and to output a result of the multiplication as an output signal to the power amplifier.

摘要翻译： 传输电路包括＆amp; 调制器执行＆Dgr; 调制调制信号的幅度调制分量并输出脉宽调制信号，角度调制器产生通过将调制信号乘以对应于发送输出的发送输出控制系数而获得的信号的角度调制分量信号 功率放大器和乘法器，将脉宽调制信号乘以角度调制分量信号，并将乘法结果作为输出信号输出到功率放大器。

公开(公告)号：US4581748A

公开(公告)日：1986-04-08

申请号：US566401

申请日：1983-12-28

申请人： Susumu Sasaki ,  Hiroshi Nakamura ,  Eisuke Fukuda

发明人： Susumu Sasaki ,  Hiroshi Nakamura ,  Eisuke Fukuda

IPC分类号： H04L27/18 ,  H04L27/34 ,  H04L27/36 ,  H04L27/38 ,  H03C5/00

CPC分类号： H04L27/3836 ,  H04L27/3455 ,  H04L27/362

摘要： A radio communication system includes a transmitter unit, a transmission line, and a receiver unit. The transmitter unit modulates an in-phase-channel (I-ch) data signal and quadrature-channel (Q-ch) data signal with two carriers having a .pi./2 phase difference with each other. A DC offset is added to either one of the I-ch and Q-ch data signals before they are modulated. In the receiver unit, a demodulation operation is performed, for the received transmission signal, by a synchronous detection with the use of a leakage carrier created due to the DC offset and included in the transmission signal.

摘要翻译： 无线电通信系统包括发射机单元，传输线路和接收机单元。 发射机单元利用彼此具有π/ 2相位差的两个载波对同相信道（I-ch）数据信号和正交信道（Q-ch）数据信号进行调制。 在调制之前，将DC偏移量添加到I-ch和Q-ch数据信号中的任一个。 在接收机单元中，对于接收到的发送信号，通过使用由于DC偏移产生的并且包括在发送信号中的泄漏载波的同步检测，执行解调操作。

公开(公告)号：US4573153A

公开(公告)日：1986-02-25

申请号：US556552

申请日：1983-11-30

申请人： Hiroshi Nakamura ,  Eisuke Fukuda ,  Susumu Sasaki

发明人： Hiroshi Nakamura ,  Eisuke Fukuda ,  Susumu Sasaki

IPC分类号： H04B3/04 ,  H04L25/49 ,  H04L27/34 ,  H04L27/36 ,  H04L27/38 ,  G06F11/00

CPC分类号： H04L27/3836 ,  H04L27/368

摘要： A data transmitting-receiving system includes a transmitter unit, a transmission line, and a receiver unit. The transmitter unit includes a first memory circuit receiving first digital input data to be transmitted, a first digital/analog (D/A) converter, a second memory circuit receiving second digital input data to be transmitted, and a second D/A converter. The first and second memory circuits can provide a first digital correction output and a second digital correction output, respectively. The first and second digital correction outputs are composed of both an own-side correction output connected to an own-side channel route and an other-side correction output connected to an other-side channel route.

摘要翻译： 数据发送接收系统包括发送单元，传输线路和接收单元。 所述发送单元包括接收要发送的第一数字输入数据，第一数/模（D / A）转换器，接收要发送的第二数字输入数据的第二存储器电路和第二D / A转换器的第一存储器电路。 第一和第二存储器电路可以分别提供第一数字校正输出和第二数字校正输出。 第一和第二数字校正输出由连接到自身侧通道路径的自身侧校正输出和与另一侧通道路径连接的另一侧校正输出构成。

公开(公告)号：US20090209276A1

公开(公告)日：2009-08-20

申请号：US12257609

申请日：2008-10-24

申请人： Jianming Wu ,  Mitsuhiro Azuma ,  Tomohiko Taniguchi ,  Eisuke Fukuda

发明人： Jianming Wu ,  Mitsuhiro Azuma ,  Tomohiko Taniguchi ,  Eisuke Fukuda

IPC分类号： H04B15/00 ,  H04B7/005

CPC分类号： H04W52/143 ,  H04W16/10 ,  H04W16/12 ,  H04W52/241 ,  H04W52/243 ,  H04W52/38

摘要： Node-B transmits a power profile of each frequency of transmission data as a step function to a UE. Each UE measures the amount of interference of a received signal, evaluates SINR over the entire frequency band with the power of the received signal, and transmits the evaluation result to Node-B. Node-B evaluates the interference profile in Node-B from the information about the SINR transmitted from the UE and the power of the transmission signal, and determines the frequency profile of the power of the signal transmitted to the UE.

摘要翻译： 节点B向UE发送作为步进功能的每个发送数据频率的功率曲线。 每个UE测量接收信号的干扰量，用接收信号的功率在整个频带上评估SINR，并将评估结果发送到节点B。 节点B从关于从UE发送的SINR的信息和发送信号的功率的信息中评估节点B中的干扰简档，并且确定发送给UE的信号的功率的频率分布。

公开(公告)号：US4665532A

公开(公告)日：1987-05-12

申请号：US693341

申请日：1985-01-22

申请人： Eisuke Fukuda ,  Yukio Takeda ,  Yoshimasa Daido ,  Hiroshi Nakamura ,  Susumu Sasaki ,  Sadao Takenaka

发明人： Eisuke Fukuda ,  Yukio Takeda ,  Yoshimasa Daido ,  Hiroshi Nakamura ,  Susumu Sasaki ,  Sadao Takenaka

IPC分类号： H04L27/00 ,  H04L27/34 ,  H04L27/36 ,  H04L27/38 ,  H04L25/34 ,  H04B7/00

CPC分类号： H04L27/3827 ,  H04L27/34 ,  H04L27/345 ,  H04L27/362

摘要： A radio communication system using a QAM system. In the transmission system, the data of each channel to be transmitted is divided into data groups having frame slots. When the polarity of the mean value of a data summed in a present data group is the same as the polarity of the mean value of the deviation of all data group coming before, all data in the present data group is inverted, a direct current component and a lower frequency component near the direct current component are suppressed, and carrier waves are injected after encoding. In the receiving system, a decoder decodes a received signal to obtain the original data before the encoding by the transmission system.

摘要翻译： 一种使用QAM系统的无线电通信系统。 在传输系统中，要发送的每个信道的数据被划分为具有帧时隙的数据组。 当在当前数据组中求和的数据的平均值的极性与所有数据组的偏差的平均值的极性相同时，本数据组中的所有数据都被反转，直流分量 并且抑制直流成分附近的低频分量，编码后注入载波。 在接收系统中，解码器对接收到的信号进行解码，以在传输系统进行编码之前获得原始数据。