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1. 发明授权

US4868850A MODEM communication system having training means and method for training same 失效
标题翻译：具有训练手段和训练方法的MODEM通信系统
公开(公告)号：US4868850A
公开(公告)日：1989-09-19
申请号：US870499
申请日：1986-06-04
申请人： Takashi Kaku , Yasuhiro Arai
发明人： Takashi Kaku , Yasuhiro Arai
IPC分类号： H04B3/10 , H04L7/027 , H04L7/04 , H04L25/03 , H04L27/01 , H04L27/38
CPC分类号： H04L27/38 , H04L25/03133 , H04L7/027 , H04L2025/03783 , H04L7/046
摘要： A multipoint type MODEM communication system having a training device for adapting receiving parameters in a receiving MODEM to a characteristic of a telephone line connected to a sending MODEM in response to a training signal sent from the sending MODEM prior to the reception of data. The training signal includes a tone for gain control, a timing signal for pull-in synchronization, and at least two impulses for equalization and carrier phase control, which are superimposed on each other. A time between the first and the last impulses defines the characteristic of the telephone line which should be adjusted in the receiving MODEM.Additional guard impulses may be added prior to and/or after the impulses. A scramble signal also may be added after the impulses.In addition, a method for training the receiving MODEM is disclosed.
摘要翻译：一种多点式MODEM通信系统，具有训练装置，用于响应于在接收数据之前从发送MODEM发送的训练信号，将接收MODEM中的接收参数适应于连接到发送MODEM的电话线路的特性。训练信号包括用于增益控制的音调，用于拉入同步的定时信号和用于均衡和载波相位控制的至少两个脉冲，它们彼此叠加。第一个和最后一个脉冲之间的时间定义了在接收MODEM中应该调整的电话线的特性。在脉冲之前和/或之后可以添加额外的保护脉冲。在脉冲之后也可以加扰乱信号。此外，公开了一种训练接收MODEM的方法。

2. 发明授权

US4694469A Method and device for timing pull-in of receiving equipment 失效
标题翻译：接收设备定时拉入的方法和装置
公开(公告)号：US4694469A
公开(公告)日：1987-09-15
申请号：US870546
申请日：1986-06-04
申请人： Takashi Kaku , Yasuhiro Arai
发明人： Takashi Kaku , Yasuhiro Arai
IPC分类号： H04L7/02 , H04L7/04 , H04B3/06 , H04B3/10
CPC分类号： H04L7/0054 , H04L7/046
摘要： A receiving equipment comprises a modulator, a timing extraction unit, a PLL unit, an impulse recovery unit, a fix-equalizer, and an automatic-equalizer. A timing pull-in operation is performed, in one way, by phase-rotating a timing signal of the timing extraction unit and sends the signal to the PLL unit, and in another way, by introducing an input signal of the timing extraction unit from the equalized output of the fix-equalizer.
摘要翻译：接收设备包括调制器，定时提取单元，PLL单元，脉冲恢复单元，固定均衡器和自动均衡器。以一种方式，通过相位旋转定时提取单元的定时信号并将该信号发送到PLL单元，并以另一种方式，通过将定时提取单元的输入信号从固定均衡器的均衡输出。

3. 发明授权

US06968497B2 Error correction device and error correction method 失效
标题翻译：纠错装置和纠错方法
公开(公告)号：US06968497B2
公开(公告)日：2005-11-22
申请号：US10109370
申请日：2002-03-28
申请人： Takashi Kaku , Ryoji Okita
发明人： Takashi Kaku , Ryoji Okita
IPC分类号： H04L1/22 , H03M13/00 , H04L1/00 , H04L29/00 , G06F11/00
CPC分类号： H03M13/00 , H04L1/0041 , H04L1/0045 , H04L1/0057 , H04L1/0063 , H04L1/20 , H04L2001/0096
摘要： The present invention is concerned with an error correction device and method for correcting errors in data items sent on a plurality of channels. An identification unit calculates an exclusive OR value for data items sent on the plurality of channels, and adopts the calculated value as data sent on a separate error correction channel. A signal quality detection unit detects the signal qualities concerning the plurality of channels. If the exclusive OR value is not equal zero, an identifying and processing unit replaces data on a channel whose signal quality is detected to be worst with an exclusive OR value for data items sent on channels other than the channel whose signal quality is worst.
摘要翻译：本发明涉及用于校正在多个信道上发送的数据项中的错误的纠错装置和方法。识别单元计算在多个信道上发送的数据项的异或值，并将计算出的值作为在单独的纠错信道上发送的数据。信号质量检测单元检测关于多个信道的信号质量。如果异或值不等于零，则识别和处理单元将其信号质量被检测为最差的信道上的数据替换为信道质量最差的信道以外的信道上发送的数据项的异或值。

4. 发明授权

US06298036B1 Multiplex transmission system wherein analog signal is transformed to base band, random-transformed and superimposed on dispersed signal points in vector signal space 失效
标题翻译：多路传输系统，其中模拟信号被转换为基带，随机变换并叠加在矢量信号空间中的分散信号点上
公开(公告)号：US06298036B1
公开(公告)日：2001-10-02
申请号：US08916595
申请日：1997-08-22
申请人： Takashi Kaku , Ryoji Okita , Noboru Kawada
发明人： Takashi Kaku , Ryoji Okita , Noboru Kawada
IPC分类号： H04J1100
CPC分类号： H04L27/3483 , H04L5/02
摘要： A transmission system for transmitting a data signal with an analog passband signal through a analog transmission line. The data signal is transformed to a signal representing a descrete data signal point in a vector signal space. The analog passband signal is transformed to a base band signal, and the base band signal is superimposed on the signal representing a descrete data signal point. A signal representing the superimposed data signal point is modulated and transmitted through the analog transmission line. In a receiver, the data signal point is decided from the signal representing the superimposed data signal point, and the superimposed bass band signal is extracted by subtracting the decided result from the signal representing the superimposed data signal point. The base band signal is transformed to the analog passband signal. A portion of information carried by the analog passband signal may be converted to a digital signal, and the digital signal is multiplexed with the data signal. Further, a portion of information of each of a plurality of analog passband signals may be converted to a digital signal, and the digital signal is multiplexed with each other, and the other portion of the information is transformed to a base band signal, and the base band signal is superimposed on a signal representing a data signal point generated from a signal generated by the multiplexing.
摘要翻译：一种用于通过模拟传输线传输具有模拟通带信号的数据信号的传输系统。将数据信号变换为表示向量信号空间中的分散数据信号点的信号。将模拟通带信号变换为基带信号，并将基带信号叠加在表示分散数据信号点的信号上。表示叠加的数据信号点的信号被调制并通过模拟传输线传输。在接收机中，数据信号点由表示叠加数据信号点的信号决定，并且通过从表示叠加数据信号点的信号中减去所确定的结果来提取叠加的低音带信号。基带信号被转换成模拟通带信号。模拟通带信号携带的信息的一部分可以被转换为数字信号，数字信号与数据信号多路复用。此外，多个模拟通带信号中的每一个的信息的一部分可以被转换为数字信号，并且数字信号彼此复用，并且信息的另一部分被变换为基带信号，并且基带信号被叠加在表示从由复用产生的信号产生的数据信号点的信号上。

5. 发明授权

US06282246B1 Frequency modulation method and modem unit employing such method 失效
标题翻译：采用这种方法的调频方式和调制解调器单元
公开(公告)号：US06282246B1
公开(公告)日：2001-08-28
申请号：US08956553
申请日：1997-10-23
申请人： Takashi Kaku , Ryoji Okita
发明人： Takashi Kaku , Ryoji Okita
IPC分类号： H04L2710
CPC分类号： H04L25/069 , H04L27/12 , H04L27/227
摘要： A frequency modulation method and modem unit for a frequency modulation using a common filter which uses a large number of carrier frequencies include a frequency-shifting unit for subjecting an input data to a frequency shift corresponding to a binary data value, a filter for limiting an output obtained by the frequency-shifting unit to a common band, and a modulation unit for frequency-modulating an output obtained by the filter, by a carrier frequency having an intermediate value of the frequencies respectively corresponding to the binary data values.
摘要翻译：使用使用大量载频的公共滤波器进行频率调制的频率调制方法和调制解调器单元包括用于使输入数据对应于二进制数据值的频移的频移单元，用于限制由所述频移单元获得的输出到公共频带的调制单元，以及用于对由所述滤波器获得的输出进行频率调制的调制单元，具有分别对应于所述二进制数据值的频率的中间值的载波频率。

6. 发明授权

US6026122A Process and system for transferring vector signal with precoding for signal power reduction 失效
标题翻译：用于传输矢量信号与预编码的信号功率降低的过程和系统
公开(公告)号：US6026122A
公开(公告)日：2000-02-15
申请号：US925495
申请日：1997-09-09
申请人： Takashi Kaku , Kyoko Hirao , Hideo Miyazawa
发明人： Takashi Kaku , Kyoko Hirao , Hideo Miyazawa
IPC分类号： H03H15/00 , H03H17/00 , H03H21/00 , H03M13/23 , H04B3/04 , H04L25/03 , H04L27/34 , H04L5/12 , H04L23/02
CPC分类号： H04L27/3411 , H04L25/03343 , H04L25/4975 , H04L27/34
摘要： A transfer process in which, an original vector signal is precoded to an intermediately-precoded vector signal, and the extended modulo operation is performed when the intermediately-precoded vector signal is located outside a predetermined extended-modulo limit area, and the precoded vector signal is transferred through a system having a predetermined filtering characteristic. From the transferred vector signal, the original vector signal is detected, based on a relationship between the vector components of the original vector signal and the transferred vector signal.
摘要翻译：原始矢量信号被预编码为中间预编码矢量信号的传送处理，当中间预编码矢量信号位于预定的扩展模数限制区域之外时执行扩展模运算，并且预编码矢量信号通过具有预定滤波特性的系统传送。根据传送的矢量信号，基于原始矢量信号的矢量分量与传送的矢量信号之间的关系来检测原始矢量信号。

7. 发明授权

US6002712A Timing phase control apparatus and timing phase control method 失效
标题翻译：定时相位控制装置和定时相位控制方法
公开(公告)号：US6002712A
公开(公告)日：1999-12-14
申请号：US898493
申请日：1997-07-22
申请人： Takashi Kaku , Noboru Kawada , Hideo Miyazawa
发明人： Takashi Kaku , Noboru Kawada , Hideo Miyazawa
IPC分类号： H03H17/02 , H03H17/08 , H04B3/06 , H04L7/02 , H04L27/22 , H04B1/38 , H03K5/159
CPC分类号： H04L7/0029 , H04L7/0087 , H04L7/007
摘要： The present invention discloses a timing phase control apparatus which is particularly suitable for use in a modem used for very high speed data transmission employing a metallic line. The timing phase control apparatus includes a timing phase extracting portion to extract timing phase information from an input signal, a timing phase control filter portion to make a timing phase control to the input signal depending upon the timing phase information from the timing phase extracting portion through filter processing using a coefficient operation having a preset impulse response characteristic, and a filter processing coefficient determining portion to determine a coefficient used for the filter processing in the timing phase control filter portion depending upon the timing phase information and information about an approximate expression of the impulse response characteristic. An accuracy of a tap coefficient can be improved while reducing an amount of information about the tap coefficient, which should be stored.
摘要翻译：本发明公开了一种定时相位控制装置，其特别适用于采用金属线路进行超高速数据传输的调制解调器。定时相位控制装置包括定时相位提取部分，用于从输入信号提取定时相位信息;定时相位控制滤波器部分，用于根据来自定时相位提取部分的定时相位信息对输入信号进行定时相位控制，使用具有预设脉冲响应特性的系数操作的滤波处理和滤波处理系数确定部分，以根据定时相位信息确定用于定时相位控制滤波器部分中的滤波处理的系数，以及关于近似表达式的信息脉冲响应特性。可以减少抽头系数的精度，同时减少应该存储的抽头系数的信息量。

8. 发明授权

US5825818A Apparatus and method of recovering a timing signal in a transmission apparatus by adjusting tap coefficients 失效
标题翻译：通过调整抽头系数来恢复发送装置中的定时信号的装置和方法
公开(公告)号：US5825818A
公开(公告)日：1998-10-20
申请号：US629382
申请日：1996-04-08
申请人： Takashi Kaku , Ryoji Okita
发明人： Takashi Kaku , Ryoji Okita
IPC分类号： H03H21/00 , H04B3/06 , H04L7/02 , H04L7/027 , H04L7/033 , H04L7/04 , H04L7/10 , H04L27/22 , H04L27/38 , H04L25/03 , H04L27/01 , H04L27/227
CPC分类号： H04L7/0058 , H04L7/10 , H04L7/027 , H04L7/033 , H04L7/046
摘要： An apparatus for recovering a timing signal from a received signal in a transmission apparatus includes an equalizer equalizing a processed signal which is provided by processing the received signal with a first signal and adjusting tap coefficients so as to eliminate distortion in the processed signal. A tap-power distribution detector detects a distribution of the tap coefficients adjusted in the equalizer. A phase control part controls a phase of the first signal according to the distribution of the tap coefficients detected in the tap-power distribution detector. In the apparatus, the phase of the first signal is controlled so as to be synchronized with a timing signal component in the received signal.
摘要翻译：一种用于在发送装置中从接收信号中恢复定时信号的装置包括均衡器，其通过处理接收信号与第一信号提供的处理信号进行均衡，并调整抽头系数，以消除处理信号中的失真。抽头功率分布检测器检测在均衡器中调整的抽头系数的分布。相位控制部分根据抽头功率分布检测器中检测到的抽头系数的分布来控制第一信号的相位。在该装置中，第一信号的相位被控制成与接收信号中的定时信号分量同步。

9. 发明授权

US5719907A Phase jitter extraction circuit and phase jitter cancellation circuit 失效
标题翻译：相位抖动提取电路和相位抖动消除电路
公开(公告)号：US5719907A
公开(公告)日：1998-02-17
申请号：US534161
申请日：1995-09-26
申请人： Takashi Kaku , Hideo Miyazawa
发明人： Takashi Kaku , Hideo Miyazawa
IPC分类号： H04B3/04 , H04B3/06 , H04L1/20 , H04L25/02 , H04L25/08 , H04L27/22 , H04L27/38 , H04L25/38 , H04L5/16
CPC分类号： H04L27/3872 , H04L1/205
摘要： The invention provides a phase jitter extraction circuit and a phase jitter cancellation circuit for use with a reception section of a communication apparatus such as a modem used to transmit data using a telephone line or a private line, which are improved in that noise of a signal is prevented from increasing to suppress phase jitters with a high degree of accuracy and high noise components can be suppressed irrespective of the power of the input signal. The phase jitter extraction circuit includes a phase jitter detection section for detecting phase jitters from input/output information of a signal discriminator, a phase jitter forecasting section for forecasting phase jitters which will be produced later from the phase jitters detected by the phase jitter detection section, a selector for selectively outputting the phase jitters detected by the phase jitter detection section or the forecast phase jitters obtained by the phase jitter forecasting section, and a selector control section for discriminating a region of signal points received by the communication apparatus by way of a transmission line and controlling the selector in accordance with a result of the discrimination.
摘要翻译：本发明提供一种相位抖动提取电路和相位抖动消除电路，用于与诸如调制解调器之类的通信装置的接收部分一起使用，该调制解调器用于使用电话线路或专用线路传输数据，防止增加以高精度抑制相位抖动，并且与输入信号的功率无关，可以抑制高噪声分量。相位抖动提取电路包括：相位抖动检测部分，用于从信号鉴别器的输入/输出信息中检测相位抖动;相位抖动预测部分，用于预测稍后将由相位抖动检测部分检测的相位抖动产生的相位抖动; 选择器，用于选择性地输出由相位抖动检测部分检测的相位抖动或由相位抖动预测部分获得的预测相位抖动，以及选择器控制部分，用于通过通信装置接收的信号点的区域传输线，并根据鉴别结果控制选择器。

10. 发明授权

US5559799A Modulator and demodulator apparatus as well as modulation and demodulation method 失效
标题翻译：调制器和解调器装置以及调制和解调方法
公开(公告)号：US5559799A
公开(公告)日：1996-09-24
申请号：US108536
申请日：1993-08-19
申请人： Hiroyasu Murata , Hideo Miyazawa , Takashi Kaku
发明人： Hiroyasu Murata , Hideo Miyazawa , Takashi Kaku
IPC分类号： H04L27/00 , H04L5/06 , H04L27/22 , H04L27/233 , H04L27/38 , H04B1/38 , H04J1/14
CPC分类号： H04L5/06 , H04L27/2338
摘要： A modulator and demodulator apparatus for use with a network is provided. The modulator and demodulator apparatus comprises a modulation section which includes a timing phase discrimination section for receiving, as an input signal thereto, a demodulation vector signal sampled into a digital value and discriminating to which one of a plurality of regions of a discrimination plane the phase of the input signal belongs. The timing phase discrimination section supplies, as an input to a next processing stage, a rotation vector obtained by rotating an input vector, moves the rotation vector to a quadrant which includes a reference discrimination region of the discrimination plane and performs, when the vector after the movement is not in the reference discrimination region, a predetermined calculation. When the vector after the movement comes to the reference discrimination region, another calculation is performed. This discriminates a timing phase of the input vector from the result of the calculation.
摘要翻译：提供一种用于网络的调制器和解调器装置。调制器和解调器装置包括调制部分，其包括定时相位鉴别部分，用于将采样成数字值的解调矢量信号作为输入信号，并将鉴别面的多个区域中的哪一个区分为相位的输入信号属于。定时相位识别部将作为输入向下一个处理级的输入提供通过旋转输入矢量而获得的旋转矢量，将旋转矢量移动到包括鉴别面的参考识别区域的象限，并且当后向量运动不在参考识别区域中，所以是预定的计算。当运动之后的矢量进入参考识别区域时，进行另一次计算。这样就从计算结果中辨别出输入向量的定时相位。

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