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41. 发明授权

US07269215B2 Equalization processing method and the apparatus for periodic fluctuation of transmission line characteristic 失效
标题翻译：均衡处理方法和传输线特性周期性波动的装置
公开(公告)号：US07269215B2
公开(公告)日：2007-09-11
申请号：US10024606
申请日：2001-10-30
申请人： Takashi Kaku , Ryoji Okita
发明人： Takashi Kaku , Ryoji Okita
IPC分类号： H03H7/30 , H04B3/14
CPC分类号： H04L25/03006
摘要： A method used in equalization processing is provided, in which a reference signal is received and a change point of transmission line characteristics is detected. A basic frequency signal of fluctuation period of the transmission line characteristics is extracted, and vectorized. The vector is adjusted such that vectors corresponding to two change points become symmetrical with respect to X axis. Then, fluctuation interval of transmission line characteristics is judged by comparing X component of the vector with a reference value. As a result, equalization processing is performed in accordance with the fluctuation.
摘要翻译：提供了一种在均衡处理中使用的方法，其中接收参考信号并检测传输线特性的变化点。提取传输线特性的波动周期的基本频率信号，并进行矢量化。调整矢量使得对应于两个变化点的矢量相对于X轴对称。然后，通过将矢量的X分量与参考值进行比较来判断传输线特性的波动间隔。结果，根据波动进行均衡处理。

42. 发明授权

US06282235B1 Signal processing apparatus 有权
标题翻译：信号处理装置
公开(公告)号：US06282235B1
公开(公告)日：2001-08-28
申请号：US09657593
申请日：2000-09-08
申请人： Takashi Kaku , Yasuhide Kihara
发明人： Takashi Kaku , Yasuhide Kihara
IPC分类号： H04B336
CPC分类号： H04L27/22
摘要： A signal processing apparatus having a register unit with the number of bits required for signal processing, which is not larger than predetermined number of bits, and comprising a ROM which inputs, as an address signal, an output signal from the register unit or an input signal to the signal processing apparatus, and uses an input signal to the register unit as a part of an output signal from the ROM. This makes it possible to greatly reduce the cost of a system which executes complex processing yet requires a reduced number of bits in the input signals and a reduced number of bits for the register that is essentially required by reducing the amount of signal processing and the number of electric components, to greatly improve the quality of the apparatus accompanying the reduction in the number of electric components, and to cheaply increase the signal processing functions without decreasing the processing speed.
摘要翻译：一种信号处理装置，具有具有不大于预定比特数的信号处理所需的位数的寄存器单元，并且包括ROM，其输入来自寄存器单元或输入的输出信号作为地址信号信号到信号处理装置，并且将来自寄存器单元的输入信号用作来自ROM的输出信号的一部分。这使得可以大大降低执行复杂处理但需要减少输入信号的位数的系统的成本，并且通过减少信号处理量和数量本质上需要的寄存器的减少的位数的电气部件，随着电气部件数量的减少而大大提高装置的质量，并且在不降低处理速度的情况下廉价地增加信号处理功能。

43. 发明授权

US6154490A Signal processing apparatus 失效
标题翻译：信号处理装置
公开(公告)号：US6154490A
公开(公告)日：2000-11-28
申请号：US543056
申请日：1995-10-13
申请人： Takashi Kaku , Yasuhide Kihara
发明人： Takashi Kaku , Yasuhide Kihara
IPC分类号： H04L25/02 , H04L27/22 , H04L29/04 , H04L29/10 , H04B10/18
CPC分类号： H04L27/22
摘要： A signal processing apparatus having a register unit with the number of bits required for signal processing, which is not larger than predetermined number of bits, and comprising a ROM which inputs, as an address signal, an output signal from the register unit or an input signal to the signal processing apparatus, and uses an input signal to the register unit as a part of an output signal from the ROM. This makes it possible to greatly reduce the cost of a system which executes complex processing yet requires a reduced number of bits in the input signals and a reduced number of bits for the register that is essentially required by reducing the amount of signal processing and the number of electric components, to greatly improve the quality of the apparatus accompanying the reduction in the number of electric components, and to cheaply increase the signal processing functions without decreasing the processing speed.
摘要翻译：一种信号处理装置，具有具有不大于预定比特数的信号处理所需的位数的寄存器单元，并且包括ROM，其输入来自寄存器单元或输入的输出信号作为地址信号信号到信号处理装置，并且将来自寄存器单元的输入信号用作来自ROM的输出信号的一部分。这使得可以大大降低执行复杂处理但需要减少输入信号的位数的系统的成本，并且通过减少信号处理量和数量本质上需要的寄存器的减少的位数成为可能的电气部件，随着电气部件数量的减少而大大提高装置的质量，并且在不降低处理速度的情况下廉价地增加信号处理功能。

44. 发明授权

US6021160A Training method for non-nyquist transmission system and training data transmission apparatus for non-nyquist transmission system 失效
标题翻译：非尼奎斯特传输系统的训练方法和非尼奎斯特传输系统的训练数据传输装置
公开(公告)号：US6021160A
公开(公告)日：2000-02-01
申请号：US539067
申请日：1995-10-04
申请人： Takashi Kaku , Noboru Kawada , Yuri Nigaki
发明人： Takashi Kaku , Noboru Kawada , Yuri Nigaki
IPC分类号： H04L27/00 , H04B3/10 , H04L1/00 , H04L7/10 , H03H7/30
CPC分类号： H04L7/10 , H04L1/0078
摘要： The invention provides a training method for a non-Nyquist transmission system and a training data transmission apparatus for a non-Nyquist transmission system by which initialization processing of a reception section can be performed with certainty even where a non-Nyquist transmission system is employed. Prior to transmission of data in accordance with a non-Nyquist transmission system, training data having a first repeat signal portion formed from a group of signals including components of a lower rate than a Nyquist interval, a first multi-value random signal portion formed from multi-value random signals, a second repeat signal portion formed from a group of signals including components of a lower rate than the Nyquist interval, a third repeat signal portion formed from a group of signals which include components lower in rate than the Nyquist interval and wherein a first signal point is different by 180 degrees in phase from a first signal which forms the second repeat signal portion, and a second multi-value random signal portion formed from multi-value random signals, are transmitted from a transmission section. The training data are received by a reception section, and initialization processing of the reception section is performed using the received training data.
摘要翻译：本发明提供了一种用于非奈奎斯特传输系统的训练方法和用于非奈奎斯特传输系统的训练数据传输装置，通过该训练数据传输装置，即使采用非奈奎斯特传输系统，也可以确定地执行接收部分的初始化处理。在根据非奈奎斯特传输系统传输数据之前，具有第一重复信号部分的训练数据，该第一重复信号部分由包括比奈奎斯特（Nyquist）间隔较低的分量的信号组形成，第一多值随机信号部分由多值随机信号，由包括比奈奎斯特间隔较低的分量的信号组的一组信号形成的第二重复信号部分，由包括比奈奎斯特间隔更低的分量的一组信号形成的第三重复信号部分，以及其中第一信号点与形成第二重复信号部分的第一信号的相位相差180度，并且从多值随机信号形成的第二多值随机信号部分从发送部分发送。训练数据由接收部分接收，并且使用所接收的训练数据来执行接收部分的初始化处理。

45. 发明授权

US5896420A Transmission apparatus having echo cancellation facility 失效
标题翻译：具有回波消除装置的发送装置
公开(公告)号：US5896420A
公开(公告)日：1999-04-20
申请号：US749346
申请日：1996-11-21
申请人： Takashi Kaku , Takeshi Asahina , Toyomi Obikawa , Ryoji Okita
发明人： Takashi Kaku , Takeshi Asahina , Toyomi Obikawa , Ryoji Okita
IPC分类号： H03H17/00 , H04B1/58 , H04B3/23 , H04L5/18 , H04L27/00 , H04B3/20
CPC分类号： H04B1/586 , H04B3/23 , H04L27/0002 , H04L5/18
摘要： A transmission apparatus, connected via a hybrid circuit to a line, such as a modulator-demodulator which can perform stable echo cancellation, whether the level of the far-end echo is high or not, provided with a transmission unit which generates a transmission signal to be transmitted to the line via the hybrid circuit, a reception unit which receives the reception signal supplied from the line via the hybrid circuit, and a superimposing means for superimposing the reception signal applied to the hybrid circuit onto the transmission signal. The transmission signal onto which the reception signal is superimposed by the superimposing means is transmitted to the line via the hybrid circuit.
摘要翻译：一种传输装置，其经由混合电路连接到线路，诸如能够执行稳定的回波消除的调制器解调器，远端回波的电平是否高，设置有发送单元，其生成发送信号经由混合电路发送到线路;接收单元，其接收经由混合电路从线路提供的接收信号;以及叠加装置，用于将施加到混合电路的接收信号叠加到发送信号上。通过叠加装置叠加接收信号的发送信号经由混合电路被发送到线路。

46. 发明授权

US5598433A Automatic equalizer and data mode convergence method 失效
标题翻译：自动均衡器和数据模式收敛方法
公开(公告)号：US5598433A
公开(公告)日：1997-01-28
申请号：US441014
申请日：1995-05-15
申请人： Takashi Kaku , Kyoko Hirao
发明人： Takashi Kaku , Kyoko Hirao
IPC分类号： H03H21/00 , H03H15/00 , H03H17/00 , H04B3/06 , H04L25/03 , H04B3/04
CPC分类号： H04L25/03038 , H04L2025/03375 , H04L2025/03471
摘要： An automatic equalizer which converges by a received signal and a data mode convergence method. A variance extracting unit extracts the variance of an output signal of a transversal automatic equalizing section and changes a predecision input signal to a proper level according to the extracted variance. A decision unit makes a decision for the predecision input signal which has been changed by the variance extracting unit and allocates the predecision input signal to a signal point. An amplitude error extracting unit extracts an amplitude error from a predecision input signal and a postdecision output signal of the decision unit and corrects the tap coefficients of the transversal automatic equalizing section according to the extracted amplitude error.
摘要翻译：一种由接收信号收敛的自动均衡器和数据模式收敛方法。方差提取单元提取横向自动均衡部分的输出信号的方差，并根据所提取的方差将预测切换输入信号改变到适当的水平。决定单元对由方差提取单元进行了改变的预先确定输入信号进行判定，并将预先确定输入信号分配给信号点。幅度误差提取单元从判定单元的预先确定输入信号和后决定输出信号中提取振幅误差，并根据提取的振幅误差校正横向自动均衡部分的抽头系数。

47. 发明授权

US5570390A Timing generation device and data transmission device having the timing generation device 失效
标题翻译：具有定时生成装置的定时生成装置和数据发送装置
公开(公告)号：US5570390A
公开(公告)日：1996-10-29
申请号：US9103
申请日：1993-01-26
申请人： Takashi Kaku , Kyoko Hirao
发明人： Takashi Kaku , Kyoko Hirao
IPC分类号： H04L7/06 , H04L5/06 , H04L7/027 , H04L7/04 , H04M11/00 , H04B3/06
CPC分类号： H04L7/027
摘要： In a timing generation device coupled to a transmission line having a main channel and a secondary channel, the main channel having a transmission speed higher than that of the secondary channel, a first unit extracts a timing signal component transmitted via the secondary channel. A second unit generates an internal timing signal in synchronism with the timing signal component, the internal timing signal being used to reproduce data transmitted via the main channel.
摘要翻译：在耦合到具有主信道和辅信道的传输线的定时生成装置中，主信道的传输速度高于副信道的传输速度，第一单元提取经由次信道发送的定时信号分量。第二单元与定时信号分量同步地产生内部定时信号，内部定时信号用于再现经由主信道发送的数据。

48. 发明授权

US5563908A Modulator and demodulator apparatus 失效
标题翻译：调制器和解调器
公开(公告)号：US5563908A
公开(公告)日：1996-10-08
申请号：US472291
申请日：1995-06-07
申请人： Takashi Kaku , Noboru Kawada
发明人： Takashi Kaku , Noboru Kawada
IPC分类号： H04J1/00 , H04L27/00 , H04L27/22 , H04L27/233 , H04M11/06 , H04B1/38
CPC分类号： H04M11/06 , H04L27/22 , H04L27/2338
摘要： The invention provides a modulator and demodulator apparatus (modem) which modulates and demodulates a signal in a main channel, for main data, and a secondary channel, for secondary data obtained by frequency division, and which includes a carrier detection unit for detecting a carrier from a demodulation signal and executes a data processing sequence for the demodulation signal in accordance with a result of detection by the carrier detection unit. This apparatus can detect a carrier of a low roll-off ratio accurately and stably without a dispersion in detection time and, consequently, data of a demodulation signal can be processed with certainty. The modulator and demodulator apparatus comprises a filter having a characteristic wherein the time axis response is slow and it is provided at a stage preceding the carrier detection unit so that a demodulation signal which has passed through the filter is input to the carrier detection unit. The modulator and demodulator apparatus includes a modulation unit for modulating and transmitting data having a turnoff sequence with a last end and a demodulation unit for receiving and demodulating a receive signal to reproduce data. The modulation unit includes a tone signal generation unit for adding a tone signal to the last end of the turnoff sequence of the data to be transmitted.
摘要翻译：本发明提供了一种调制器和解调器装置（调制解调器），其对主数据的主信道中的信号和辅助信道进行调制和解调，用于通过分频获得的二次数据，并且包括用于检测载波的载波检测单元根据解调信号，根据载波检测单元的检测结果执行解调信号的数据处理顺序。该装置可以精确稳定地检测低滚降比的载波，而不会在检测时间内出现分散，从而可以确定地处理解调信号的数据。调制器和解调器装置包括具有时间轴响应慢的特性的滤波器，并且其被提供在载波检测单元之前的阶段，使得已经通过滤波器的解调信号被输入到载波检测单元。调制器和解调器装置包括用于调制和发送具有最后一端的切断序列的数据的调制单元和用于接收和解调接收信号以再现数据的解调单元。调制单元包括音调信号生成单元，用于将音调信号与要发送的数据的关闭序列的最后一个相加。

49. 发明授权

US5319650A Modulator-demodulator device capable of detecting an unsynchronized frame state 失效
公开(公告)号：US5319650A
公开(公告)日：1994-06-07
申请号：US635520
申请日：1991-02-13
申请人： Yasunao Mizutani , Takashi Kaku
发明人： Yasunao Mizutani , Takashi Kaku
IPC分类号： H04L7/04 , H04L27/38
CPC分类号： H04L27/38 , H04L7/048
摘要： In a modulator-demodulator device, in the transmitter side an error control coding unit is provided for adding redundancy according to a predetermined procedure to a bit sequence to be transmitted from bit processing unit to code the bit sequence. A data sequence-to-coordinate transforming unit transforms the bit sequence from the error control coding unit into a coordinate of a signal point on a complex plane. A coordinate rotating unit rotates the transformed signal point coordinates based on the frame phase information from a frame phase generating unit. In the receiver side, a coordinate rotating unit applies the rotation in the reverse direction of that of the coordinate rotating unit of the transmitter side based on the frame phase information from the frame phase generating unit. A the second unit determines the maximum likelihood signal point by utilizing the redundancy added by the error control coding unit of the transmitter side and corrects the coordinate error of the received signal point. An unsynchronized frame state determining unit determines the unsynchronized frame state based on the distance between the decision point determined by the maximum likelihood signal point determining unit and the demodulated received signal point on the complex plane, whereby the synchronized frame state is quickly detected. In the modulator-demodulator device, an evaluation value is designated for each of the transition sequence of signals. In the receiver side, an error control signal decoding is carried out in the manner that the transition sequence of the maximum likelihood received signal is selected based on the updated evaluation value and the error in the demodulated signal is corrected, whereby the error in the data transmission is corrected.

50. 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。

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