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61. 发明授权

US5974090A Special eye pattern and modulation and demodulation method using the same 失效
标题翻译：特殊的眼图和调制解调方法采用相同的方式
公开(公告)号：US5974090A
公开(公告)日：1999-10-26
申请号：US529415
申请日：1995-09-18
申请人： Kyoko Hirao , Takashi Kaku , Hiroyasu Murata
发明人： Kyoko Hirao , Takashi Kaku , Hiroyasu Murata
IPC分类号： H04L7/04 , H04L27/18 , H04L5/12 , H04L23/02
CPC分类号： H04L27/18 , H04L7/04
摘要： The invention relates to an eye pattern which is generated upon transmission and also to a modulation and demodulation method which employs the eye pattern. The eye pattern and the modulation and demodulation method are improved in that, by devising the arrangement of signal points, the timing jitter amount is minimized and a frequency offset can be followed up accurately. The eye pattern to be generated upon transmission is constructed such that the arrangement of signal points thereof is not symmetrical with respect to the origin on a signal point arrangement plane on which the signal points are arranged.
摘要翻译：本发明涉及在发送时产生的眼图，以及采用眼图的调制和解调方法。通过设计信号点的布置，改善了眼图和调制和解调方法，使定时抖动量最小化并且可以准确地跟踪频率偏移。在发送时产生的眼图被构造为使得其信号点的布置在其上布置信号点的信号点布置平面上相对于原点不对称。

62. 发明授权

US5557632A Demodulation and roll-off filter apparatus 失效
标题翻译：解调和滚降过滤装置
公开(公告)号：US5557632A
公开(公告)日：1996-09-17
申请号：US29238
申请日：1993-03-10
申请人： Takashi Kaku , Hiroyasu Murata
发明人： Takashi Kaku , Hiroyasu Murata
IPC分类号： H03D3/00 , H03D1/00 , H03D7/16 , H03H17/06 , H04L27/00 , H04L27/22 , H04B1/10 , H04L27/06
CPC分类号： H03H17/0664 , H03D1/00 , H04L27/00 , H03D7/161 , H03H17/0621
摘要： A demodulation and roll-off filter apparatus comprises a demodulation portion, a decimation portion, a demodulation and roll-off filter portion, and a modulation portion. The demodulation portion converts a pass-band signal received from an A/D converter into a base-band signal. The decimation filter portion lowers the sampling frequency of the base-band signal into a frequency four times higher than the frequency of a demodulation carrier used for the demodulation and roll-off filter portion. The modulation portion converts a base-band signal received from the decimation filter portion into a pass-band signal. The demodulation and roll-off filter portion performs a simplified demodulation and roll-off filter process for the pass-band signal.
摘要翻译：解调和滚降滤波器装置包括解调部分，抽取部分，解调和滚降滤波器部分以及调制部分。解调部分将从A / D转换器接收的通带信号转换为基带信号。抽取滤波器部分将基带信号的采样频率降低到用于解调和滚降滤波器部分的解调载波的频率的四倍以上的频率。调制部分将从抽取滤波器部分接收的基带信号转换为通带信号。解调和滚降滤波器部分对通带信号执行简化的解调和滚降滤波处理。

63. 发明授权

US5189684A Line signal deterioration removing systems 失效
标题翻译：线信号去除系统
公开(公告)号：US5189684A
公开(公告)日：1993-02-23
申请号：US582207
申请日：1990-10-02
申请人： Takashi Kaku , Hiroki Kishimoto , Kyoko Hirao
发明人： Takashi Kaku , Hiroki Kishimoto , Kyoko Hirao
IPC分类号： H04L1/20 , H04L27/00 , H04L27/233
CPC分类号： H04L27/2332 , H04L1/205 , H04L2027/003 , H04L2027/0057
摘要： A system for removing line deterioration elements such as intersymbol interference, carrier frequency offset and phase jitter, etc. from the receiving signal. An automatic equalizing unit compensates for signal deterioration by intersymbol interference. Next, a carrier phase control unit compensates for signal deterioration by carrier frequency offset. Thereafter, a phase jitter interference removing units allows increase of only phase jitter element by utilizing line characteristic to easily extract phase jitter element. Since the signal including phase jitter is a low frequency signal, a phase jitter removing unit further removes phase jitter by shifting the frequency range to a higher frequency range on the frequency axis and then shifting it to the bandwidth for each processing.
摘要翻译： PCT No.PCT / JP90 / 00735 Sec。 371 1990年10月2日第 102（e）1990年10月2日日期PCT提交1990年6月6日PCT公布。 WO90 / 16117 PCT出版物日期：1990年12月27日。一种用于从接收信号中去除线路恶化元件的码间干扰，载波频率偏移和相位抖动等的系统。自动均衡单元通过符号间干扰来补偿信号恶化。接下来，载波相位控制单元通过载波频率补偿来补偿信号劣化。此后，相位抖动干扰去除单元允许通过利用线路特性来增加仅相位抖动元件以容易地提取相位抖动元件。由于包括相位抖动的信号是低频信号，相位抖动去除单元还通过将频率范围移动到频率轴上的较高频率范围，然后将其移动到每个处理的带宽来消除相位抖动。

64. 发明授权

US5175745A Transversal type automatic equalizer with tap coefficient protection 失效
标题翻译：具有贴片保护功能的横向型自动均衡器
公开(公告)号：US5175745A
公开(公告)日：1992-12-29
申请号：US585622
申请日：1990-09-20
申请人： Takashi Kaku , Hiroki Kishimoto
发明人： Takashi Kaku , Hiroki Kishimoto
IPC分类号： H03H15/00 , H03H21/00 , H04B3/06 , H04L25/03
CPC分类号： H04L25/03044
摘要： A system of the transversal type automatic equalizer with a tap coefficient protection in which an inter-symbol interference is prevented. The system includes a summing unit for summing all of the tap powers detected by tap power detecting unit, and a determination unit for comparing the sum produced by the summing unit with a predetermined threshold value, and for producing the output determination of normal when the sum is not more than the threshold value and producing the output determination of abnormal tap coefficient growth when the sum is more than the threshold value.

65. 发明授权

US4672630A Training method of data receiving equipment 失效
标题翻译：数据接收设备的培训方法
公开(公告)号：US4672630A
公开(公告)日：1987-06-09
申请号：US842355
申请日：1986-03-18
申请人： Takashi Kaku
发明人： Takashi Kaku
IPC分类号： H04B3/10 , H04L7/10 , H04L25/03 , H04B3/04
CPC分类号： H04L7/10 , H04L25/03133 , H04L2025/03783
摘要： Data receiving equipment is trained by training signal of optimum length through the steps that the sending equipment sends data signal after sending the training signal having a length corresponding to the characteristics of a line connected thereto and containing information indicating the length and the receiving equipment trains itself with the received training signal and detects, using the information indicating the length, the timing when the training signal changes to a data signal.
摘要翻译： PCT No.PCT / JP83 / 00191 Sec。 371日期1984年2月17日 102（e）日期1984年2月17日PCT提交1983年6月15日PCT公布。出版物WO84 / 日期：1984年1月5日。数据接收设备通过发送设备发送数据信号的步骤训练最佳长度的训练信号，该训练信号的长度对应于与其连接的线路的特性，并包含指示并且接收设备用接收到的训练信号训练自己，并且使用指示长度的信息来检测训练信号改变为数据信号的定时。

66. 发明授权

US4482973A Digital automatic gain control circuit 失效
标题翻译：数字自动增益控制电路
公开(公告)号：US4482973A
公开(公告)日：1984-11-13
申请号：US393120
申请日：1982-06-28
申请人： Shigeyuki Unagami , Kuninosuke Ihira , Takashi Kaku
发明人： Shigeyuki Unagami , Kuninosuke Ihira , Takashi Kaku
IPC分类号： H03G3/20 , H03G3/30
CPC分类号： H03G3/3089
摘要： A digital automatic gain control circuit provided with a first AGC loop and a second AGC loop; activated alternately. The first AGC loop is activated when an input signal is initially supplied. The loop produces a certain digital value calculated as an inverse number of the digital level of the input through predetermined digital arithmetic operations utilizing an approximation polynominal. The calculated digital value is then preset in certain portions of the second AGC loop. The second AGC loop starts operating by using said present value, then uses the digital level of the input itself, instead of the preset value, and produces an automatic gain controlled digital output. Utilizing said preset value as an initial input to the second AGC loop allows for rapid stabilization of the automatic gain controlled digital output.
摘要翻译：一种具有第一AGC环路和第二AGC环路的数字自动增益控制电路; 交替激活。当最初提供输入信号时，第一个AGC环路被激活。该循环通过利用近似多项式的预定数字运算产生通过输入的数字电平的倒数计算出的某个数字值。然后将计算出的数字值预设在第二AGC环路的某些部分。第二AGC循环通过使用所述当前值开始运行，然后使用输入本身的数字电平而不是预设值，并产生自动增益控制的数字输出。利用所述预设值作为第二AGC环路的初始输入允许自动增益受控数字输出的快速稳定。

67. 发明授权

US07286600B2 Data transmission method and data transmission device 失效
标题翻译：数据传输方式和数据传输设备
公开(公告)号：US07286600B2
公开(公告)日：2007-10-23
申请号：US10620819
申请日：2003-07-16
申请人： Hiroyasu Murata , Takashi Kaku
发明人： Hiroyasu Murata , Takashi Kaku
IPC分类号： H04L27/00
CPC分类号： H04L27/2605 , H04L25/03343 , H04L27/2644 , H04L2025/03414
摘要： A power line carrier communication system can effectively reduce leak electromagnetic field generation. Transmission data is copied on a frequency axis, and vector multiplication of a finite-difference function is performed to insert either a zero signal or an inverted signal between original signals.
摘要翻译：电力线载波通信系统可有效减少电磁场泄漏产生。传输数据在频率轴上复制，并执行有限差分函数的矢量相乘以在原始信号之间插入零信号或反相信号。

68. 发明授权

US07286494B2 Polling communication system and polling control method 失效
标题翻译：轮询通信系统和轮询控制方法
公开(公告)号：US07286494B2
公开(公告)日：2007-10-23
申请号：US10198607
申请日：2002-07-18
申请人： Takashi Kaku , Kyoko Hirao
发明人： Takashi Kaku , Kyoko Hirao
IPC分类号： H04B1/44 , H04J3/16 , H04L12/403 , H04L12/43 , G06F3/00
CPC分类号： H04L12/403 , H04B3/542 , H04B2203/5408 , H04B2203/5425 , H04B2203/5445
摘要： A polling communication system includes a main station and a plurality of sub stations connected to the main station. The main station includes an address control part and a polling control part. The address control part divides a predetermined polling cycle into a plurality of kinds of polling intervals each having a different number of times of polling, and holds addresses of polling target sub stations corresponding to the respective polling intervals. The polling control part switches the polling intervals and changes the addresses in the address control part according to states of the sub stations. Each of the sub stations includes another polling control part that sends a response when the sub station is polled by the main station.
摘要翻译：轮询通信系统包括主站和连接到主站的多个子站。主站包括地址控制部分和轮询控制部分。地址控制部分将预定轮询周期划分成具有不同轮询次数的多种轮询间隔，并且保持对应于相应轮询间隔的轮询目标子站的地址。轮询控制部分切换轮询间隔，并根据子站的状态改变地址控制部分中的地址。每个子站包括另一个轮询控制部分，当主站被主站轮询时发送响应。

69. 发明授权

US07173959B2 Noise elimination method and apparatus 失效
标题翻译：消噪方法及装置
公开(公告)号：US07173959B2
公开(公告)日：2007-02-06
申请号：US10331078
申请日：2002-12-27
申请人： Takashi Kaku
发明人： Takashi Kaku
IPC分类号： H04B1/00
CPC分类号： H04B1/7097 , H04B3/54 , H04B2203/5416 , H04B2203/5425 , H04B2203/5441 , H04B2203/5445 , H04B2203/5458 , H04B2203/5483 , H04B2203/5491
摘要： In a noise elimination method and apparatus, a spread spectrum modulation signal having a data signal and an overlapping noise component at a signal point on a time axis and a noise component at a zero point on the time axis is received. A correlation of the received modulation signal to a spread spectrum code is generated by using a correlating filter. Zero is set at points of the modulation signal other than the signal point where the correlation becomes the maximum, so that the noise component at the zero point is extracted from the modulation signal. The noise component at the signal point is predicted by performing interpolation prediction based on the extracted noise component. The noise component at the signal point is removed from the modulation signal based on the predicted noise component.
摘要翻译：在噪声消除方法和装置中，接收在时间轴上的信号点具有数据信号和重叠噪声分量的扩展频谱调制信号以及时间轴零点的噪声分量。通过使用相关滤波器来生成接收的调制信号与扩频码的相关性。在除相关变为最大的信号点之外的调制信号的点处设置零，从而从调制信号中提取零点的噪声分量。通过基于提取的噪声分量执行内插预测来预测信号点处的噪声分量。基于预测的噪声分量，将信号点的噪声分量从调制信号中去除。

70. 发明授权

US07113557B2 Noise canceling method and apparatus 失效
公开(公告)号：US07113557B2
公开(公告)日：2006-09-26
申请号：US10047132
申请日：2002-01-15
申请人： Takashi Kaku , Ryoji Okita
发明人： Takashi Kaku , Ryoji Okita
IPC分类号： H03D1/04 , H03K5/01 , H04B1/10 , H04L25/08
CPC分类号： H04L27/2647 , H04B1/1036 , H04B1/12 , H04B1/123 , H04B2203/5425
摘要： A canceling method and apparatus can achieve a fast communication by improving an S/N value by adaptively canceling a noise with respect to a frequency or band having a large noise by selecting noise canceling band in accordance with a condition of noise being generated. A reception signal contains a specific signal having a specified time position, amplitude and phase. A noise distribution of the specific signal is recognized so as to predict a noise by extracting a frequency band having a larger noise component from a pair of frequencies generated by the insertion of the specific signal. An original transmission signal is reproduced by canceling the predicted noise from the reception signal.

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