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1. 发明授权

US06898256B2 Synchronization method and apparatus 失效
标题翻译：同步方法和装置
公开(公告)号：US06898256B2
公开(公告)日：2005-05-24
申请号：US10319927
申请日：2002-12-12
申请人： Takashi Kaku , Takahiro Kurakata , Hideo Miyazawa
发明人： Takashi Kaku , Takahiro Kurakata , Hideo Miyazawa
IPC分类号： H04L7/02 , H04L7/06 , H04L27/26 , H04L27/34 , H04L7/00
CPC分类号： H04L27/2613 , H04J7/00 , H04L7/06 , H04L27/2656 , H04L27/3455
摘要： In a synchronization method and apparatus in a data transmission using a transparent transmission line, a periodic amplitude modulation is applied, or a zero-point is inserted, as a synchronizing signal to a transmission signal point on a transmission side at a preceding stage of a transparent transmission line. Also, in case of a frame synchronization, a power value of a received signal is calculated on a reception side of the above-mentioned transparent transmission line and the synchronizing signal is vectorized using the power values whose phases are different from each other by 90 degrees on a time axis.
摘要翻译：在使用透明传输线的数据传输的同步方法和装置中，施加周期性幅度调制或插入零点作为同步信号到发送侧的发送信号点，在前一阶段透明传输线。此外，在帧同步的情况下，在上述透明传输线的接收侧计算接收信号的功率值，并且使用相位彼此不同的功率值向量化同步信号90度在时间轴上。

2. 发明授权

US07110465B2 Noise canceling method and apparatus 失效
公开(公告)号：US07110465B2
公开(公告)日：2006-09-19
申请号：US09819395
申请日：2001-03-28
申请人： Takashi Kaku , Hideo Miyazawa , Takahiro Kurakata , Hiroyasu Murata
发明人： Takashi Kaku , Hideo Miyazawa , Takahiro Kurakata , Hiroyasu Murata
IPC分类号： H04B15/00
CPC分类号： H04B1/123 , H04B1/1036 , H04L27/2647
摘要： In a noise canceling method and an apparatus therefor which notices the colored noise looked macroscopically, positively cancels the dominant noise component in the low frequency band, shifts the S/N value to plus, and can extract the reception signal buried in the low frequency band and having a comparatively high level, a signal in which a time axis, an amplitude, and a phase are specified or a zero-point signal is inserted into a transmission signal by an inserter, a noise component is interpolated by using the specified signal or the zero-point signal by a noise canceler, and an originally transmitted signal is regenerated by subtracting the noise component from the reception signal.

3. 发明申请

US20060256890A1 Noise cancelling method and apparatus 审中-公开
标题翻译：降噪方法和装置
公开(公告)号：US20060256890A1
公开(公告)日：2006-11-16
申请号：US11492523
申请日：2006-07-25
申请人： Takashi Kaku , Hideo Miyazawa , Takahiro Kurakata , Hiroyasu Murata
发明人： Takashi Kaku , Hideo Miyazawa , Takahiro Kurakata , Hiroyasu Murata
IPC分类号： H04B15/00
CPC分类号： H04B1/123 , H04B1/1036 , H04L27/2647
摘要： In a noise canceling method and an apparatus therefor which notices the colored noise looked macroscopically, positively cancels the dominant noise component in the low frequency band, shifts the S/N value to plus, and can extract the reception signal buried in the low frequency band and having a comparatively high level, a signal in which a time axis, an amplitude, and a phase are specified or a zero-point signal is inserted into a transmission signal by an inserter, a noise component is interpolated by using the specified signal or the zero-point signal by a noise canceler, and an originally transmitted signal is regenerated by subtracting the noise component from the reception signal.
摘要翻译：在一种噪声消除方法及其装置中，注意到宏观上看到的着色噪声，肯定地抵消了低频带中的主要噪声分量，将S / N值移位为正，并且可以提取埋在低频带中的接收信号并且具有相对较高的电平，其中指定了时间轴，振幅和相位的信号或者由插入器将零点信号插入到发送信号中，通过使用指定的信号来内插噪声分量，或零点信号通过噪声消除器，并且通过从接收信号中减去噪声分量来再生原始发送的信号。

4. 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。

5. 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。

6. 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。

7. 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。

8. 发明授权

US06882684B2 Automatic gain control circuit, data communication device and automatic gain control method 失效
标题翻译：自动增益控制电路，数据通讯装置及自动增益控制方式
公开(公告)号：US06882684B2
公开(公告)日：2005-04-19
申请号：US09756793
申请日：2001-01-10
申请人： Takashi Kaku , Hideo Miyazawa
发明人： Takashi Kaku , Hideo Miyazawa
IPC分类号： H04L27/38 , H03G3/30 , H04L27/08 , H04L27/34 , H03H7/30 , H03H7/40 , H03K5/159
CPC分类号： H04L27/34 , H03G3/3089 , H04L27/08
摘要： An automatic gain control circuit includes a first portion which calculates a first error amount, and a second portion which calculates a second error amount. Both calculated error amount is sent to a determination module. Further, an integrator integrates an error amount, a difference between a power of an input signal and an average power of an eye pattern for example. The determination determines whether the integrated error amount exceeds a predetermined value or not, and output either of the first error amount and the second error amount based on the determination.
摘要翻译：自动增益控制电路包括计算第一误差量的第一部分和计算第二误差量的第二部分。两个计算出的错误量被发送到确定模块。此外，积分器将误差量，输入信号的功率与眼图的平均功率之间的差异进行积分。该判定是否确定积分误差量是否超过预定值，并且基于该确定来输出第一误差量和第二误差量中的任一个。

9. 发明授权

US06377647B1 PLL circuit 失效
标题翻译： PLL电路
公开(公告)号：US06377647B1
公开(公告)日：2002-04-23
申请号：US09205804
申请日：1998-12-04
申请人： Takashi Kaku , Noboru Kawada , Hideo Miyazawa
发明人： Takashi Kaku , Noboru Kawada , Hideo Miyazawa
IPC分类号： H03D324
CPC分类号： H03L7/091 , H04L7/0331
摘要： A PLL circuit that causes an internal oscillation signal to lock to an external input clock signal, and is capable of suppressing jitter. The PLL circuit includes a frequency dividing circuit for frequency-dividing an input clock signal; a voltage-controlled oscillator; a missing-pulse clock signal creation circuit for creating, based on an output signal of the voltage-controlled oscillator, a missing-pulse clock signal having a higher speed than that of an output signal of the frequency dividing circuit and having a periodic missing-pulse portion; a phase comparator circuit for sampling the output signal of the frequency dividing circuit by using the missing-pulse clock signal; a shift register for storing a change in the output signal of the phase comparator circuit; and a digital signal processing circuit for converting a value stored in the shift register into a phase difference, and for controlling the input voltage to the voltage-controlled oscillator based on the phase difference.
摘要翻译： PLL电路使内部振荡信号锁定到外部输入时钟信号，并且能够抑制抖动。 PLL电路包括用于对输入时钟信号进行分频的分频电路; 压控振荡器; 一个缺失脉冲时钟信号产生电路，用于根据压控振荡器的输出信号创建一个具有比分频电路的输出信号高的缺失脉冲时钟信号，脉冲部分相位比较器电路，用于通过使用缺失脉冲时钟信号对分频电路的输出信号进行采样; 移位寄存器，用于存储相位比较器电路的输出信号的变化; 以及数字信号处理电路，用于将存储在移位寄存器中的值转换为相位差，并且用于基于相位差控制到压控振荡器的输入电压。

10. 发明授权

US6104758A Process and system for transferring vector signal with precoding for signal power reduction 失效
公开(公告)号：US6104758A
公开(公告)日：2000-08-15
申请号：US925181
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
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.

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