公开(公告)号：US5319636A

公开(公告)日：1994-06-07

申请号：US791702

申请日：1991-11-14

申请人： Guozhu Long ,  Fuyun Ling ,  M. Vedat Eyuboglu

发明人： Guozhu Long ,  Fuyun Ling ,  M. Vedat Eyuboglu

IPC分类号： H04B3/23 ,  H04J15/00

CPC分类号： H04B3/235 ,  H04B3/232

摘要： A device and method utilize a linear feedback/feedforward configuration to estimate and cancel a listener echo wherein equalizer (202) and listener echo cancellation (204 and 208) units are jointly updated, allowing determination of an error signal once (204 and 208), in place of the former method of separate error signal determination for each of an equalizer and a listener echo canceller. An improved phase-correction scheme is utilized to compensate the frequency offset in the listener echo. The relationship between the listener echo and talker far echo is utilized to facilitate the listener echo cancellation.

摘要翻译： 一种设备和方法利用线性反馈/前馈配置来估计和消除收听者回声，其中均衡器（202）和收听者回声消除（204和208）单元被联合更新，允许确定一次错误信号（204和208） 代替均衡器和收听回波消除器中的每一个的单独的误差信号确定的前一种方法。 利用改进的相位校正方案来补偿收听者回波中的频率偏移。 听众回声和讲话者远端回声之间的关系被用来促进听众回声消除。

公开(公告)号：US5406552A

公开(公告)日：1995-04-11

申请号：US181278

申请日：1994-01-13

申请人： Guozhu Long ,  Fuyun Ling ,  M. Vedat Eyuboglu

发明人： Guozhu Long ,  Fuyun Ling ,  M. Vedat Eyuboglu

IPC分类号： H04B3/23 ,  H04M1/00

CPC分类号： H04B3/235 ,  H04B3/232

摘要： A device and method utilize a linear feedback/feedforward configuration to estimate and cancel a listener echo wherein equalizer (202) and listener echo cancellation (204 and 208) units are jointly updated, allowing determination of an error signal (204 and 208), in place of the former method of separate error signal determination for each of an equalizer and a listener echo canceller. An improved phase-correction scheme is utilized to compensate the frequency offset in the listener echo. The relationship between the listener echo and talker far echo is utilized to facilitate the listener echo cancellation.

摘要翻译： 设备和方法利用线性反馈/前馈配置来估计和消除收听者回声，其中均衡器（202）和收听者回声消除（204和208）单元被联合更新，允许确定误差信号（204和208） 对于均衡器和收听回波消除器中的每一个，单独的误差信号确定的前一种方法的位置。 利用改进的相位校正方案来补偿收听者回波中的频率偏移。 听众回声和讲话者远端回声之间的关系被用来促进听众回声消除。

公开(公告)号：US4987569A

公开(公告)日：1991-01-22

申请号：US333992

申请日：1989-04-05

申请人： Fuyun Ling ,  Guozhu Long

发明人： Fuyun Ling ,  Guozhu Long

IPC分类号： G06F17/10 ,  H04B3/23

CPC分类号： H04B3/237 ,  H04B3/238

摘要： An echo cancellation modem having a fast training echo canceller in which the echo cancellation coefficients are computed by taking correlations between a complex, periodic training signal sequence and a real component of the corresponding echo signal. The modem includes a receiver circuit for detecting a signal on a channel possibly including an echo; an echo canceller for estimating the real component of the echo signal; training circuitry for applying the complex training sequence to the channel and for taking correlations between the training sequence and the real component of the corresponding echo signal. The modem also includes a computational element for computing the period of the periodic sequence, generating the complex periodic train sequence in real time and for computing a phase roll frequency based upon the computed echo cancellation coefficients.

公开(公告)号：US08565418B2

公开(公告)日：2013-10-22

申请号：US13482642

申请日：2012-05-29

申请人： Cheng Li ,  Guozhu Long ,  Jie Lv ,  Huishen Dong ,  Liming Fang

发明人： Cheng Li ,  Guozhu Long ,  Jie Lv ,  Huishen Dong ,  Liming Fang

IPC分类号： H04M7/00

CPC分类号： H04L5/20 ,  H04L25/0272

摘要： The present invention provides a method, a device and a system for extending channels, and belongs to the field of communications technologies. The method includes: generating a non-cascade extended channel by using a first channel and a second channel; and generating a first-level cascade extended channel by using the non-cascade extended channel and a third channel, where the first channel and the second channel are both twisted-pair channels, and the third channel is a twisted-pair channel or another non-cascade extended channel. The device includes a first transformer and a second transformer. The system includes a first device and a second device.

摘要翻译： 本发明提供一种用于扩展信道的方法，装置和系统，属于通信技术领域。 该方法包括：通过使用第一信道和第二信道来产生非级联扩展信道; 以及通过使用非级联扩展信道和第三信道来生成第一级级联扩展信道，其中第一信道和第二信道都是双绞线信道，并且第三信道是双绞线信道或另一非信道 级联扩展通道。 该装置包括第一变压器和第二变压器。 该系统包括第一设备和第二设备。

公开(公告)号：US08537912B2

公开(公告)日：2013-09-17

申请号：US13034353

申请日：2011-02-24

申请人： Guozhu Long ,  Amir H. Fazlollahi ,  Liming Fang ,  Yuchen Jia

发明人： Guozhu Long ,  Amir H. Fazlollahi ,  Liming Fang ,  Yuchen Jia

IPC分类号： H04K1/10

CPC分类号： H04L25/14 ,  H04L5/0007 ,  H04L27/28 ,  H04M11/062

摘要： Disclosed is an apparatus that includes a plurality of parallel digital signal transmitters that each receive one of a plurality of digital sub-signals wherein each of the plurality of digital signal transmitters is configured to transmit one of the plurality of digital sub-signals that each have about the same bandwidth. The apparatus also includes a combiner coupled to the transmitters and configured to shift some of the plurality of digital sub-signals and to combine the plurality of shifted digital sub-signals into a combined digital signal that has a total bandwidth of that is approximately equal to the sum of the bandwidths of the plurality of digital sub-signals. The total bandwidth comprises a plurality of shifted bandwidths of the plurality of digital sub-signals at about the same offset with respect to each other. The combined digital signal is transmitted over a digital subscriber loop.

摘要翻译： 公开了一种装置，其包括多个并行数字信号发射机，每个并行数字信号发射机都接收多个数字子信号中的一个，其中多个数字信号发射机中的每一个被配置为发送每个数字子信号中的每一个 大约相同的带宽。 该装置还包括组合器，其耦合到发射机并且被配置为移动多个数字子信号中的一些并且将多个移位的数字子信号组合成具有总共带宽的组合数字信号近似等于 多个数字子信号的带宽之和。 总带宽包括相对于彼此大致相同偏移的多个数字子信号的多个移位带宽。 组合的数字信号通过数字用户回路传输。

公开(公告)号：US08442131B2

公开(公告)日：2013-05-14

申请号：US12353903

申请日：2009-01-14

申请人： Guozhu Long

发明人： Guozhu Long

IPC分类号： H04K1/10

CPC分类号： H04M11/062 ,  H04L5/003 ,  H04L12/10 ,  H04L27/2601 ,  Y02D50/44

摘要： An apparatus comprising a transmitter configured to transmit a low power mode Discrete Multi-Tone (DMT) signal using a plurality of DMT tones, wherein at least some of the DMT tones comprise a low power mode (LPM) tone that carries data at a normal PSD level and a non-LPM tone that is transmitted at a reduced PSD level. Also disclosed is a network component comprising at least one processor configured to implement a method comprising detecting a plurality of signal to noise ratio (SNR) values for a plurality of LPM tone signals and a plurality of non-LPM tone signals, and handling crosstalk interference between lines using the detected SNR values.

摘要翻译： 一种装置，包括发射机，其被配置为使用多个DMT音调发送低功率模式离散多音（DMT）信号，其中，所述DMT音调中的至少一些包括在正常情况下携带数据的低功率模式（LPM）音调 PSD电平和以降低的PSD电平发送的非LPM音。 还公开了一种网络组件，包括至少一个处理器，其被配置为实现一种方法，包括检测多个LPM音调信号和多个非LPM音调信号的多个信噪比（SNR）值，以及处理串扰干扰 使用检测到的SNR值。

公开(公告)号：US20120311653A1

公开(公告)日：2012-12-06

申请号：US13587646

申请日：2012-08-16

申请人： Guijin Xu ,  Ruzhou Feng ,  Guozhu Long ,  Jianhua Liu

发明人： Guijin Xu ,  Ruzhou Feng ,  Guozhu Long ,  Jianhua Liu

IPC分类号： H04N7/173

CPC分类号： H04J3/0638 ,  H04M11/062

摘要： A clock synchronization method, customer premises equipment and a clock synchronization system are provided. The customer premises equipment reads a first time stamp when receiving a first specific position of a first DMT signal sent by central office equipment; reads a second time stamp when sending a second specific position of a second DMT signal; receives a third time stamp and a fourth time stamp that are sent by the central office equipment through a data information channel. The third time stamp is read when the central office equipment sends the first specific position of the first DMT signal, and the fourth time stamp is read when the central office equipment receives the second specific position of the second DMT signal. The customer premises equipment adjusts a clock of the customer premises equipment according to the first, second, third and fourth time stamps.

摘要翻译： 提供了时钟同步方法，客户端设备和时钟同步系统。 当接收到由中心局设备发送的第一DMT信号的第一特定位置时，客户驻地设备读取第一时间戳; 当发送第二DMT信号的第二特定位置时读取第二时间戳; 接收由中心局设备通过数据信息通道发送的第三时间戳和第四时间戳。 当中央办公设备发送第一DMT信号的第一特定位置时，读取第三时间戳，并且当中心局设备接收到第二DMT信号的第二特定位置时，读取第四时间戳。 客户端设备根据第一，第二，第三和第四时间戳来调整客户驻地设备的时钟。

公开(公告)号：US08243844B2

公开(公告)日：2012-08-14

申请号：US12276564

申请日：2008-11-24

申请人： Guozhu Long

发明人： Guozhu Long

IPC分类号： H04L27/00

CPC分类号： H04L27/2618 ,  H04L27/2647

摘要： An apparatus comprising a transmitter configured to transmit a low power mode Discrete Multi-Tone (DMT) signal using a plurality of DMT tones, wherein a subset of the DMT tones are used for transmitting data, and wherein at least some of the remaining DMT tones are used for a Peak-to-Average Ratio (PAR) reduction is disclosed. Included is a network component comprising at least one processor configured to implement a method comprising promoting transmission of a plurality of data streams using a plurality of first digital tones, and promoting transmission of at least one second digital tone that reduces a peak of a signal generated by at least one of the first digital tones.

摘要翻译： 一种装置，包括发射机，其被配置为使用多个DMT音调发送低功率模式离散多音（DMT）信号，其中所述DMT音调的子集用于发送数据，并且其中所述剩​​余DMT音调中的至少一些 用于降低峰值平均比（PAR）。 包括的网络组件包括至少一个处理器，该处理器被配置为实现一种方法，该方法包括使用多个第一数字音调促进多个数据流的传输，以及促进至少一个第二数字音调的传输，所述至少一个第二数字音调降低产生的信号的峰值 通过至少一个第一数字音调。

公开(公告)号：US20110075685A1

公开(公告)日：2011-03-31

申请号：US12895326

申请日：2010-09-30

申请人： Guijin Xu ,  Guozhu Long ,  Ruzhou Feng

发明人： Guijin Xu ,  Guozhu Long ,  Ruzhou Feng

IPC分类号： H04J3/06

CPC分类号： H04L7/04 ,  H04J3/06 ,  H04J3/0685 ,  H04L27/2663 ,  H04L27/2672 ,  H04L27/2676 ,  H04L27/2682 ,  H04L27/2688 ,  H04L27/2691

摘要： A method, apparatus, and system for time synchronization are disclosed. The method comprising: obtaining a master sending time stamp, a slave receiving time stamp, a slave sending time stamp, and a master receiving time stamp; and adjusting the time of the slave clock according to the offset calculated from the time stamps to synchronize with the clock time of the master clock. With the present invention, in passband transmission systems that transmit signals continuously in units of symbols, the time synchronization is implemented between the master clock and the slave clock.

摘要翻译： 公开了一种用于时间同步的方法，装置和系统。 该方法包括：获得主发送时间戳，从接收时间戳，从发送时间戳和主接收时间戳; 并根据从时间戳计算的偏移量调整从时钟的时间，以与主时钟的时钟时间同步。 利用本发明，在以符号为单位连续发送信号的通带传输系统中，在主时钟和从时钟之间实现时间同步。

公开(公告)号：US20110007788A1

公开(公告)日：2011-01-13

申请号：US12830960

申请日：2010-07-06

申请人： Raphael Jean Cendrillon ,  Liming Fang ,  Guozhu Long

发明人： Raphael Jean Cendrillon ,  Liming Fang ,  Guozhu Long

IPC分类号： H04B1/38

CPC分类号： H04B3/32 ,  H04B3/487 ,  H04L1/0026

摘要： An apparatus comprising a first transceiver at a central office (CO) coupled to a second transceiver at a customer premise equipment (CPE) via a digital subscriber line (DSL), a crosstalk precoder coupled to the first transceiver at the CO, and a vectoring control entity (VCE) coupled to the transceiver via a feedback channel and to the crosstalk precoder, wherein the second transceiver comprises a noise monitor configured to detect non-crosstalk noise in a downstream signal from the CO to the CPE, and wherein the first transceiver is configured to receive a predefined special feedback signal from the second transceiver that indicates whether non-crosstalk noise is detected in the downstream signal instead of a measured error value.

摘要翻译： 一种装置，包括经由数字用户线（DSL）在客户驻地设备（CPE）处耦合到第二收发器的中心局（CO）处的第一收发器，耦合到CO处的第一收发器的串扰预编码器，以及向量 控制实体（VCE），其经由反馈信道和所述串扰预编码器耦合到所述收发器，其中所述第二收发机包括被配置为检测从所述CO到所述CPE的下行信号中的非串扰噪声的噪声监测器，并且其中所述第一收发器 被配置为从第二收发器接收预定的特殊反馈信号，其指示在下行信号中是否检测到非串扰噪声，而不是测量的误差值。