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11. 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。

12. 发明授权

US06282237B1 Multiple 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：US06282237B1
公开(公告)日：2001-08-28
申请号：US09167612
申请日：1998-10-06
申请人： Takashi Kaku , Ryoji Okita , Noboru Kawada
发明人： Takashi Kaku , Ryoji Okita , Noboru Kawada
IPC分类号： H04L516
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 base 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，叠加的基带信号通过从表示叠加数据信号点的信号中减去判定结果来提取。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。

13. 发明授权

US06226302B1 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：US06226302B1
公开(公告)日：2001-05-01
申请号：US09164750
申请日：1998-10-01
申请人： Takashi Kaku , Ryoji Okita , Noboru Kawada
发明人： Takashi Kaku , Ryoji Okita , Noboru Kawada
IPC分类号： H04J316
CPC分类号： H04L27/3483 , H04L5/02
摘要： A transmitter has a power calculation unit for calculating the power of a signal. A maximum value detection circuit determines a maximum value of an output of the power calculation unit, and a floating point transformation circuit changes an output of the maximum value detection circuit into a floating point representation. A significant bit extracting circuit extracts significant bits from an output of the floating point transformation circuit and outputs the significant bits as the transmitting signal.
摘要翻译：发射机具有用于计算信号功率的功率计算单元。最大值检测电路确定功率计算单元的输出的最大值，并且浮点变换电路将最大值检测电路的输出改变为浮点表示。有效位提取电路从浮点变换电路的输出中提取有效位，并输出有效位作为发送信号。

14. 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。

15. 发明授权

US5710754A 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：多路复用传输系统，其中模拟信号被变换到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：US5710754A
公开(公告)日：1998-01-20
申请号：US482742
申请日：1995-06-07
申请人： Takashi Kaku , Ryoji Okita , Noboru Kawada
发明人： Takashi Kaku , Ryoji Okita , Noboru Kawada
IPC分类号： H04L5/02 , H04L27/34 , H04J11/00
CPC分类号： H04L27/3483 , H04L5/02
摘要： A transmission system includes a transmitter and a receiver and transmits a data signal with an analog passband signal through an analog transmission line. The data signal is transformed to a signal representing a descrete data signal point in a vector signal space. The transmitter includes a data signal point generation unit and a vector signal superimposing unit. 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. The receiver includes a demodulator unit and a decision unit, wherein the data signal point is decided from the signal representing the superimposed data signal point, and the superimposed base band signal is extracted in a subtracter unit 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 in a multiplexer unit with the data signal. 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：传输系统包括发射机和接收机，并通过模拟传输线路发送具有模拟通带信号的数据信号。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。发射机包括数据信号点产生单元和矢量信号叠加单元。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。接收机包括解调器单元和判定单元，其中数据信号点由表示叠加的数据信号点的信号确定，并且叠加的基带信号通过从代表叠加数据信号的信号中减去所确定的结果而在减法器单元中被提取叠加数据信号点。基带信号被转换成模拟通带信号。由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，并且数字信号被多路复用在具有数据信号的多路复用器单元中。基带信号被叠加在表示由多路复用产生的信号产生的数据信号点的信号上。

16. 发明授权

US5625643A Modulator and demodulator apparatus 失效
标题翻译：调制器和解调器
公开(公告)号：US5625643A
公开(公告)日：1997-04-29
申请号：US108547
申请日：1993-08-19
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 of the carrier detection unit. This apparatus improved in that it 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.
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并且根据载波检测单元的检测结果执行解调信号的数据处理序列。该装置的改进在于它可以精确而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。

17. 发明授权

US06002724A Transmission apparatus and control method therefor 失效
标题翻译：传动装置及其控制方法
公开(公告)号：US06002724A
公开(公告)日：1999-12-14
申请号：US748346
申请日：1996-11-14
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： H04L27/00 , H04B1/16 , H04J3/06 , H04L7/00 , H04L29/08 , H03H7/30 , H04B1/06 , H04B1/38
CPC分类号： H04J3/0688 , H04L7/0083
摘要： A transmission apparatus such as a modem has a receiving unit which receives information and a clock-supplying unit which supplies a clock signal to the receiving unit. It further has an instantaneous dropout detection unit which detects the occurrence of an instantaneous dropout on the receiving circuit and a clock supply control unit which stops the supply of a clock to the receiving unit for a prescribed amount of time when the instantaneous dropout detection unit detects an instantaneous dropout, the stopping of the clock supply causing holding of receiving parameters and the restarting of clock supply causing restarting of the receiving operation.
摘要翻译：诸如调制解调器的传输设备具有接收信息的接收单元和向接收单元提供时钟信号的时钟提供单元。它还具有一个瞬时压差检测单元，其检测接收电路上的瞬时压差的发生;以及时钟供给控制单元，其在瞬时压差检测单元检测到停止向接收单元提供时钟达预定时间瞬时脱落，停止时钟供应，导致接收参数的保持以及引起重新启动接收操作的时钟供应的重新启动。

18. 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。

19. 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。

20. 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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