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1. 发明授权

US5367540A Transversal filter for use in a digital subscriber line transmission interface 失效
标题翻译：用于数字用户线路传输接口的横向滤波器
公开(公告)号：US5367540A
公开(公告)日：1994-11-22
申请号：US004895
申请日：1993-01-19
申请人： Mitsuo Kakuishi , Seiji Mikyoshi , Hiroaki Itokawa , Nobukazu Koizumi , Yutaka Awata , Yuko Kurosaki
发明人： Mitsuo Kakuishi , Seiji Mikyoshi , Hiroaki Itokawa , Nobukazu Koizumi , Yutaka Awata , Yuko Kurosaki
IPC分类号： H03H17/04 , H04B1/10
CPC分类号： H03H17/04
摘要： A transversal filter has a transfer function for which a zero point occurs outside a unit circle on z plane and thus the output waveform has a ringing characteristic having a change from negative to positive around a precursor and before a main cursor and is associated and integrated with another transversal filter, thereby forming a waveform shaping decimation filter or a pulse shaping high-pass filter. The waveform decimation filter can eliminate a high frequency noise, changes a high frequency input data to a low frequency output data, and performs a waveform shaping operation. Therefore it cannot require a pulse shaping filter separated from the decimation filter. The pulse shaping high-pass filter includes a pulse shaping filter whose number of the taps is decreased and performs high-pass filter function. A pulse shaping filter whose number of the taps is decreased can be used separately from the high-pass filter.
摘要翻译：横向滤波器具有传递函数，在z平面上的单位圆外部出现零点，因此输出波形具有在前体周围具有从负到正的变化的振铃特性，并且在主光标之前并且与主光标相关联并与另一个横向滤波器，从而形成波形整形抽取滤波器或脉冲整形高通滤波器。波形抽取滤波器可以消除高频噪声，将高频输入数据改变为低频输出数据，并执行波形整形操作。因此，不需要从抽取滤波器分离的脉冲整形滤波器。脉冲整形高通滤波器包括抽头数减少并执行高通滤波功能的脉冲整形滤波器。能够使抽头数减少的脉冲整形滤波器与高通滤波器分开使用。

2. 发明授权

US5659609A Echo canceller and waveform-distortion compensation device 失效
标题翻译：回波消除器和波形失真补偿装置
公开(公告)号：US5659609A
公开(公告)日：1997-08-19
申请号：US503620
申请日：1995-07-18
申请人： Nobukazu Koizumi , Mitsuo Kakuishi , Yutaka Awata
发明人： Nobukazu Koizumi , Mitsuo Kakuishi , Yutaka Awata
IPC分类号： H04B3/06 , H04B1/10 , H04B3/23 , H04B3/26
CPC分类号： H04B3/23
摘要： An echo canceller is disclosed which generates an echo replica based on a transmit signal to cancel an echo. The echo canceller includes a linear echo canceller circuit for generating an echo replica of the transmit signal in the absence of distortion. The echo canceller further includes a waveform-distortion compensation circuit, coupled with the linear echo canceller circuit, for generating an echo replica for compensating waveform distortion occurred in an echo response when the transmit signal is distorted. In the echo canceller, the echo is canceled by use of the echo replica generated in the linear echo canceller circuit in the absence of distortion in the transmit signal, and is canceled by use of the echo replica generated in the waveform-distortion compensation circuit when the transmit signal is distorted.
摘要翻译：公开了一种回波消除器，其基于发送信号产生回波复制以消除回波。回波消除器包括用于在不存在失真的情况下产生发射信号的回波复制品的线性回波消除器电路。回波消除器还包括与线性回波消除器电路耦合的波形失真补偿电路，用于产生用于在发送信号失真时在回波响应中发生的波形失真的回波复制品。在回波消除器中，通过在发送信号中没有失真的情况下，通过使用在线性回波消除器电路中生成的回波副本来消除回波，并且通过使用在波形失真补偿电路中产生的回波复制来解除回波发送信号失真。

3. 发明授权

US5638409A Data receiving device for reproducing a received symbol from a received data signal 失效
标题翻译：数据接收装置，用于从接收的数据信号再现接收的符号
公开(公告)号：US5638409A
公开(公告)日：1997-06-10
申请号：US342105
申请日：1994-11-18
申请人： Yutaka Awata , Nobukazu Koizumi , Yasuo Ohtomo , Mitsuo Kakuishi
发明人： Yutaka Awata , Nobukazu Koizumi , Yasuo Ohtomo , Mitsuo Kakuishi
IPC分类号： H03M1/12 , H03H21/00 , H03L7/06 , H04B3/06 , H04J3/06 , H04L7/00 , H04L7/02 , H04L25/03 , H04L7/033
CPC分类号： H04L7/0062 , H04J3/0602 , H04L7/0083
摘要： A data receiving device for reproducing a received symbol from a received data signal, includes a timing recovery circuit for controlling a phase of sampling the received data signal, by using pre-cursor information, the timing recovery circuit produces sampling phase control information by eliminating a high frequency component for the pre-cursor information, accumulating eliminated output, comparing accumulated output with a positive or a negative threshold value and subtracting the threshold value from compared output. The data receiving device further includes a masking circuit for masking the sampling phase control information when no-signal data or frame is detected in the received data signal.
摘要翻译：一种用于从接收到的数据信号再现接收到的符号的数据接收装置包括：定时恢复电路，用于通过使用前置光标信息来控制对接收到的数据信号进行采样的相位，定时恢复电路通过消除用于前置信息的高频分量，积累消除的输出，将累积输出与正阈值或负阈值进行比较，并从比较输出中减去阈值。数据接收装置还包括掩蔽电路，用于在接收到的数据信号中检测无信号数据或帧时屏蔽采样相位控制信息。

4. 发明授权

US5617450A Digital subscriber loop interface unit 失效
标题翻译：数字用户回路接口单元
公开(公告)号：US5617450A
公开(公告)日：1997-04-01
申请号：US288358
申请日：1994-08-10
申请人： Mitsuo Kakuishi , Yutaka Awata , Nobukazu Koizumi
发明人： Mitsuo Kakuishi , Yutaka Awata , Nobukazu Koizumi
IPC分类号： H03H15/00 , H03H17/00 , H03H17/04 , H03H21/00 , H04B3/06 , H04B3/23 , H04B7/015 , H04L25/03 , H04L25/49 , H03H7/30
CPC分类号： H04L25/4919 , H03H17/06 , H04B7/015 , H04L25/03057
摘要： A digital subscriber loop interface unit, connected to a digital subscriber loop, includes an echo canceler for carrying out a echo canceling operation, a decision feedback equalizer for carrying out an equalizing operation, and a transversal filter, provided in at least one of the echo canceler and the decision feedback equalizer, in which a plurality of taps among all taps are grouped into groups, each group including a predetermined number of taps continuously arranged, a single tap coefficient being assigned to the taps in each group. A digital subscriber loop interface unit may include an echo canceler for carrying out a echo canceling operation by using a value obtained by adding +1 to a symbol value represented by a 2B1Q code. Further, the echo canceler may have a jitter echo canceler in which a convolution operation is carried out by using a value obtained by adding +1 to a symbol value represented by the 2B1Q code, the tap coefficient used in the convolution operation is changed in accordance with a time elapsing from occurrence of the jitter. Furthermore, a digital subscriber loop interface unit may have a low-pass filter in which a filter coefficient is changed based on whether the decision feedback equalizer is in or after a pull-in step.
摘要翻译：连接到数字用户环路的数字用户环路接口单元包括用于执行回波消除操作的回波消除器，用于执行均衡操作的判决反馈均衡器和在至少一个回波中提供的横向滤波器消除器和决策反馈均衡器，其中所有抽头中的多个抽头被分组成组，每个组包括连续布置的预定数量的抽头，单个抽头系数被分配给每个组中的抽头。数字用户环路接口单元可以包括回波消除器，用于通过使用通过将+1加到由2B1Q码表示的符号值获得的值来执行回波消除操作。此外，回波消除器可以具有抖动回波消除器，其中通过使用通过将+1加到由2B1Q码表示的符号值获得的值来执行卷积运算，卷积运算中使用的抽头系数根据随着抖动发生的时间逐渐消逝。此外，数字用户环路接口单元可以具有低通滤波器，其中基于判决反馈均衡器是否在拉入步骤中或之后改变滤波器系数。

5. 发明授权

US5375147A Jitter compensating device 失效
标题翻译：抖动补偿装置
公开(公告)号：US5375147A
公开(公告)日：1994-12-20
申请号：US932635
申请日：1992-08-20
申请人： Yutaka Awata , Mitsuo Kakuishi , Nobukazu Koizumi
发明人： Yutaka Awata , Mitsuo Kakuishi , Nobukazu Koizumi
IPC分类号： H04B3/23 , H04L7/00 , H04L7/02
CPC分类号： H04B3/237
摘要： An impulse response of a litter may change in the output of a filter unit immediately after the generation of a litter according to a sampling timing signal from a timing regenerating unit if a filter unit is provided between an A/D converting unit and an echo canceler. In this case, a selecting unit in a jitter compensating unit compensates an uncanceled echo through each of the outputs sequentially selected by a plurality of adaptive filter unit. Plural sets of tap coefficients are stored in a tap coefficient storage unit, from which the selecting unit sequentially reads them to operate one adaptive filter unit, thereby reducing the size of a jitter compensating circuit.
摘要翻译：如果滤波器单元设置在A / D转换单元和回波消除器之间，则根据来自定时再生单元的采样定时信号，在产生垫料之后立即在滤波器单元的输出中改变冲击响应。在这种情况下，抖动补偿单元中的选择单元通过由多个自适应滤波器单元顺序选择的每个输出来补偿未检测回波。抽头系数的多组存储在抽头系数存储单元中，选择单元从该抽头系数存储单元顺序读取它们以操作一个自适应滤波器单元，从而减小抖动补偿电路的尺寸。

6. 发明授权

US5399985A Digital PLL circuit 失效
标题翻译：数字PLL电路
公开(公告)号：US5399985A
公开(公告)日：1995-03-21
申请号：US33001
申请日：1993-03-18
申请人： Yutaka Awata , Nobukazu Koizumi , Yasuo Ohtomo , Mitsuo Kakuishi
发明人： Yutaka Awata , Nobukazu Koizumi , Yasuo Ohtomo , Mitsuo Kakuishi
IPC分类号： G11B20/14 , H03L7/06 , H03L7/093 , H03L7/099 , H03L7/107 , H04L7/033 , H03K5/13 , H03L7/087 , H03L7/089 , H03L7/18
CPC分类号： H03L7/0992 , H03L7/107
摘要： The invention provides a digital PLL circuit wherein the integration time constant of a random walk filter can be varied adaptively in response to a frequency error. A master clock signal having a frequency equal to N (integral number) times that of an input clock signal is normally divided by N by a divider, and the division output of the divider and the input clock signal are compared in phase with each other by a phase comparator. The dividing ratio of the divider is temporarily varied in accordance with a result of the comparison so as to make the phases of the division output and the input clock signal coincide with each other to establish synchronism between them. A variable step number random walk filter is interposed between the phase comparator and the divider and has a selectively settable integration time constant, and an integration time constant setting circuit varies the step number of the random walk filter in accordance with information of a last phase controlling direction or directions and information of a phase controlling direction at present to vary the integration time constant of the random walk filter.
摘要翻译：本发明提供一种数字PLL电路，其中随机游走滤波器的积分时间常数可以响应于频率误差而自适应变化。具有等于输入时钟信号的N（整数）倍的频率的主时钟信号通常被除法器除以N，并且除法器和输入时钟信号的除法输出被相位相互比较，相位比较器。根据比较结果，分频器的分频比暂时变化，从而使分频输出和输入时钟信号的相位相互一致，从而建立它们之间的同步。可变步数随机游走滤波器插入在相位比较器和分频器之间，并且具有可选择的可设定积分时间常数，并且积分时间常数设定电路根据最后相位控制的信息改变随机游走滤波器的步数目前的相位控制方向的方向或方向和信息，以改变随机游走滤波器的积分时间常数。

7. 发明授权

US07555055B2 Digital subscriber line communicating system 有权
标题翻译：数字用户线通信系统
公开(公告)号：US07555055B2
公开(公告)日：2009-06-30
申请号：US10918071
申请日：2004-08-13
申请人： Seiji Miyoshi , Yutaka Awata , Hiroyasu Murata , Nobukazu Koizumi , Takashi Sasaki
发明人： Seiji Miyoshi , Yutaka Awata , Hiroyasu Murata , Nobukazu Koizumi , Takashi Sasaki
IPC分类号： H04B15/00 , H04B1/38
CPC分类号： H04L5/0046 , H04B3/32 , H04L5/0007 , H04L27/2613 , H04L27/2655 , H04M11/062 , H04Q2213/13039 , H04Q2213/1319 , H04Q2213/13209
摘要： A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side comprising a sliding window transmitting unit for transmitting DMT symbols according to the sliding window through the telephone line to the receiving side, and the receiving side comprising a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reduced without largely departing from the standard system.
摘要翻译：一种具有通过电话线连接的中心局和远程终端的数字用户线路通信系统，发送侧包括滑动窗口发送单元，用于通过电话线向接收侧发送根据滑动窗口的DMT符号，并且接收其包括滑动窗口接收单元，用于根据来自发送侧的滑动窗口接收DMT符号，所述滑动窗口指示由于接收侧的TCM-ISDN传输而导致的串扰状态的相位，由此TCM串话可以在不偏离标准体系的情况下减少。

8. 发明申请

US20050232171A1 Digital subscriber line transmission method, apparatus and system 有权
标题翻译：数字用户线路传输方法，装置和系统
公开(公告)号：US20050232171A1
公开(公告)日：2005-10-20
申请号：US11159806
申请日：2005-06-23
申请人： Kazutomo Hasegawa , Hidetake Asahina , Seiji Miyoshi , Nobukazu Koizumi , Yutaka Awata
发明人： Kazutomo Hasegawa , Hidetake Asahina , Seiji Miyoshi , Nobukazu Koizumi , Yutaka Awata
IPC分类号： H04L5/16 , H04B1/38 , H04B1/56 , H04B3/02 , H04B3/10 , H04B3/20 , H04B3/32 , H04J1/12 , H04J1/16 , H04J11/00 , H04L5/02 , H04L5/14 , H04L25/03 , H04L27/26 , H04L29/06 , H04M11/06 , H04Q11/04
CPC分类号： H04B3/32 , H04B3/02 , H04B3/10 , H04L5/0007 , H04L5/0048 , H04L5/023 , H04L5/1438 , H04L5/1469 , H04L5/1492 , H04L27/2607 , H04L27/2613 , H04L2025/03414 , H04M11/062 , H04M11/068 , H04Q11/0457 , H04Q2213/13039 , H04Q2213/13176 , H04Q2213/13209
摘要： When training carried out prior to data communication is performed in digital subscriber line transmission (xDSL), the side which transmits training symbols adds some data that is contained in a training symbol sequence onto at least one of the beginning and end of this symbol sequence and then transmits the training symbol sequence. The receiving side removes the data that has been added onto the training symbol sequence and executes training processing. The length of the training symbol sequence and of a transmit symbol sequence at time of normal communication is set in such a manner that the symbol sequence will not fall within an interval in which effects of near-end crosstalk from a neighboring line are received. Further, at the time of training prior to data communication, timing information, which specifies an interval in which effects of crosstalk from a neighboring line are received, is inserted into a training symbol sequence and the training symbol sequence is transmitted from a device on the office side to a device on the subscriber side.
摘要翻译：当在数字用户线路传输（xDSL）中执行在数据通信之前进行的训练时，发送训练符号的一侧将包含在训练符号序列中的一些数据添加到该符号序列的开头和结尾中的至少一个上，然后发送训练符号序列。接收侧将已添加到训练符号序列上的数据移除并执行训练处理。训练符号序列的长度和正常通信时的发送符号序列的长度被设定为使得符号序列不会落在接收到来自相邻线的近端串扰的影响的间隔内。此外，在数据通信之前的训练时，指定接收到来自相邻线的串扰的影响的间隔的定时信息被插入到训练符号序列中，并且训练符号序列从办公室侧到订户侧的设备。

9. 发明授权

US07286495B2 Digital subscriber line transmission method, apparatus and system 有权
标题翻译：数字用户线路传输方法，装置和系统
公开(公告)号：US07286495B2
公开(公告)日：2007-10-23
申请号：US11159806
申请日：2005-06-23
申请人： Kazutomo Hasegawa , Hidetake Asahina , Seiji Miyoshi , Nobukazu Koizumi , Yutaka Awata
发明人： Kazutomo Hasegawa , Hidetake Asahina , Seiji Miyoshi , Nobukazu Koizumi , Yutaka Awata
IPC分类号： H04B1/44 , H04L5/14 , H04J4/00 , H04J3/06
CPC分类号： H04B3/32 , H04B3/02 , H04B3/10 , H04L5/0007 , H04L5/0048 , H04L5/023 , H04L5/1438 , H04L5/1469 , H04L5/1492 , H04L27/2607 , H04L27/2613 , H04L2025/03414 , H04M11/062 , H04M11/068 , H04Q11/0457 , H04Q2213/13039 , H04Q2213/13176 , H04Q2213/13209
摘要： A digital subscriber line transmission (xDSL)-, system includes a transmitting side which transmits training symbols by adding some data that is contained in a training symbol sequence onto at least one of the beginning and the end of this symbol sequence and then transmits the training symbol sequence. A receiving side removes the data that has been added onto the training symbol sequence and executes training processing. The length of the training symbol sequence and of a transmit symbol sequence at time of normal communication is set in such a manner that the symbol sequence will not fall within an interval in which effects of near-end crosstalk from a neighboring line are received. The data added to the training symbol sequence specifies an interval in which effects of the crosstalk are received.
摘要翻译：数字用户线路传输（xDSL）系统包括发送侧，通过将包含在训练符号序列中的一些数据添加到该符号序列的开始和结束中的至少一个上来发送训练符号，然后发送训练符号序列。接收侧将已添加到训练符号序列上的数据移除并执行训练处理。训练符号序列的长度和正常通信时的发送符号序列的长度被设定为使得符号序列不会落在接收到来自相邻线的近端串扰的影响的间隔内。添加到训练符号序列的数据指定接收串扰效果的间隔。

10. 发明授权

US07072386B1 Digital subscriber line communicating system and a transceiver in the system 失效
标题翻译：数字用户线路通信系统和系统中的收发器
公开(公告)号：US07072386B1
公开(公告)日：2006-07-04
申请号：US09336636
申请日：1999-06-18
申请人： Kazutomo Hasegawa , Seiji Miyoshi , Yutaka Awata , Takashi Sasaki , Nobukazu Koizumi
发明人： Kazutomo Hasegawa , Seiji Miyoshi , Yutaka Awata , Takashi Sasaki , Nobukazu Koizumi
IPC分类号： H04B1/38
CPC分类号： H04B3/02 , H04B3/32 , H04L5/1438 , H04L5/1492 , H04L27/2613 , H04L27/2626 , H04L27/2655 , H04L27/2691
摘要： A digital subscriber line communicating system for communicating between a transmitting side and a receiving side through a communication line, comprising a hyperframe counter for periodically counting a predetermined number of continuous transmitting data symbols constituting a hyperframe synchronized with a timing signal, and a decoder for discriminating, based on the count value of the hyperframe counter, whether a transmitting data symbol belongs to a FEXTR or a NEXTR.A sequencer is provided for initializing the status during an initialization period before starting usual communication. The initialization period includes an activation and acknowledgement sequence, a transceiver training sequence, a channel analysis sequence, and an exchange sequence. According to a single bitmap mode, the initialization is carried out by transmitting modulated symbols through only inside of said sliding window. According to a dual bitmap mode, the initialization except for an S/N measuring sequence in the channel analysis sequence is carried out by transmitting modulated symbols through only inside of said sliding window, and the S/N measuring sequence is carried out by transmitting modulated symbols through both inside and outside of said sliding window.
摘要翻译：一种用于通过通信线路在发送侧和接收侧之间通信的数字用户线路通信系统，包括用于周期性地计数构成与定时信号同步的超帧的预定数量的连续发送数据符号的超帧计数器，以及用于鉴别，基于超帧计数器的计数值，发送数据符号是否属于FEXT 或NEXT 。提供定序器用于在开始通常通信之前的初始化期间初始化状态。初始化周期包括激活和确认序列，收发器训练序列，信道分析序列和交换序列。根据单个位图模式，通过仅通过所述滑动窗口的内部发送调制符号来执行初始化。根据双位图模式，除了通道分析序列中的S / N测量序列之外的初始化通过仅通过所述滑动窗口的内部发送调制符号来执行，并且S / N测量序列通过发送调制通过所述滑动窗口的内部和外部的符号。

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