公开(公告)号：US20110274149A1

公开(公告)日：2011-11-10

申请号：US13184276

申请日：2011-07-15

申请人： Guijin Xu ,  Guozhu Long ,  Ruijie Xiao ,  Zhilei Zhao ,  Xuyong Wu ,  Yuchen Jia

发明人： Guijin Xu ,  Guozhu Long ,  Ruijie Xiao ,  Zhilei Zhao ,  Xuyong Wu ,  Yuchen Jia

IPC分类号： H04L7/04

CPC分类号： H04L7/0041 ,  H04J3/0638 ,  H04M11/062

摘要： The present invention provides a method, an apparatus, and a system for time synchronization of an xDigital Subscriber Line (xDSL). The method includes: transmitting, by a customer premises equipment (CPE), a first symbol to a central office (CO) equipment, and obtaining time Ts2 indicating the moment that the first symbol is transmitted; receiving, by the CPE, a second symbol transmitted by the CO, and obtaining time Ts1 indicating the moment that the second symbol is received; obtaining, by the CPE obtains time Tm2 indicating the moment that the first symbol is received by the CO and time Tm1 indicating the moment that the second symbol is transmitted by the CO; the CPE calculates an offset between a clock of the CPE and a clock of the CO according to Ts1, Ts2, Tm1, Tm2 and a delay of the CPE; and the CPE adjusts the clock of the CPE according to the offset to achieve synchronization. According to the present invention, by adjusting the time of the clock of the CPE and the time of the clock of the CO, the offset between the clock of the CPE and the clock of the CO can be obtained accurately to effectively achieve time synchronization between the CPE and the CO.

摘要翻译： 本发明提供了一种用于x数字用户线（xDSL）的时间同步的方法，装置和系统。 该方法包括：由客户驻地设备（CPE）向中心局（CO）设备发送第一符号，并获取指示发送第一符号的时刻的时间Ts2; 由所述CPE接收由所述CO发送的第二符号，并获得指示接收到所述第二符号的时刻的时间Ts1; 通过CPE获得表示由CO接收到第一符号的时刻的时间Tm2和表示CO发送第二符号的时刻的时间Tm1; CPE根据Ts1，Ts2，Tm1，Tm2和CPE的延迟来计算CPE的时钟与CO的时钟之间的偏移; 并且CPE根据偏移量调整CPE的时钟以实现同步。 根据本发明，通过调整CPE的时钟时间和CO的时钟时间，可以精确地获得CPE的时钟与CO的时钟之间的偏移量，以有效地实现CPE的时钟之间的时间同步 CPE和CO。

公开(公告)号：US06865190B2

公开(公告)日：2005-03-08

申请号：US09846883

申请日：2001-05-01

申请人： Syed Abbas ,  Guozhu Long

发明人： Syed Abbas ,  Guozhu Long

IPC分类号： H04L27/26 ,  H04M11/06 ,  H04J3/00 ,  G06F11/00

CPC分类号： H04L27/2601 ,  H04M11/062

摘要： Framing techniques for ADSL systems that allow programmable fixed overhead efficient framing and seamless rate changes.

摘要翻译： 支持ADSL系统的成帧技术，允许可编程的固定开销高效框架和无缝速率更改。

公开(公告)号：US06725176B1

公开(公告)日：2004-04-20

申请号：US10056786

申请日：2002-01-22

申请人： Guozhu Long ,  Jalil Kamali ,  Syed A. Abbas ,  Steven R. Blackwell

发明人： Guozhu Long ,  Jalil Kamali ,  Syed A. Abbas ,  Steven R. Blackwell

IPC分类号： G06F1516

CPC分类号： H04L43/50 ,  H04M3/304

摘要： The present invention provides techniques for performing loop diagnostics in DSL communication systems.

摘要翻译： 本发明提供了用于在DSL通信系统中执行循环诊断的技术。

公开(公告)号：US06628704B1

公开(公告)日：2003-09-30

申请号：US09514976

申请日：2000-02-29

申请人： Guozhu Long ,  Chin Hung ,  Yaron Bar-Ness

发明人： Guozhu Long ,  Chin Hung ,  Yaron Bar-Ness

IPC分类号： H04L516

CPC分类号： H04L25/03012 ,  H04L2025/03414 ,  H04L2025/03477

摘要： A technique for training an equalizer of an ADSL Annex C transceiver is provided. The technique defines the points in the transmission sequence at which equalizer training should take place, and what symbols comprising the transmission should be used for training. The technique avoids the effect of strong TCM-ISDN cross-talk noise. The equalizer is trained so as to achieve optimal communication channel performance. During the TEQ training phase, the cyclic prefix is not introduced. The TEQ is trained only on FEXT symbols except the FEXT symbols adjacent to NEXT symbols. In the early phase of FEQ training, the cyclic prefix is not introduced. The FEQ is trained on FEXT symbols only except the FEXT symbols adjacent to NEXT symbols. During a late training phase after the cyclic prefix is introduced, the training of the FEQ is continued by using signals received on all FEXT symbols only. Due to the introduction of the cyclic prefix and the time-domain equalizer, the inter-symbol interference is basically eliminated. Therefore, the FEXT symbols adjacent to NEXT symbols are not affected by the TCM-ISDN noise that exists in NEXT symbols only. As a result, the received signal on those symbols can also be used to train FEQ. In a show-time phase, the FEQ is updated on FEXT and NEXT symbols for bins where the number of bits per symbol is non-zero.

摘要翻译： 提供了一种用于训练ADSL附件C收发器的均衡器的技术。 该技术定义了发射序列中要进行均衡器训练的点，以及包含传输的什么符号应用于训练。 该技术避免了强大的TCM-ISDN串扰噪声的影响。 对均衡器进行训练，以实现最佳的通信通道性能。 在TEQ训练阶段，不引入循环前缀。 TEQ只对FEXT符号进行训练，除了与NEXT符号相邻的FEXT符号。 在FEQ训练的早期阶段，不引入循环前缀。 FEQ仅对除了与NEXT符号相邻的FEXT符号外的FEXT符号进行训练。 在引入循环前缀之后的延迟训练阶段期间，通过使用仅在所有FEXT符号上接收的信号来继续训练FEQ。 由于引入循环前缀和时域均衡器，基本上消除了符号间干扰。 因此，与NEXT符号相邻的FEXT符号不受仅存在于NEXT符号中的TCM-ISDN噪声的影响。 结果，这些符号上的接收信号也可用于训练FEQ。 在显示时间阶段，FEQ在FEXT和NEXT符号上更新，其中每个符号的位数不为零。

公开(公告)号：US06560276B1

公开(公告)日：2003-05-06

申请号：US09160587

申请日：1998-09-25

申请人： Guozhu Long ,  Jim Beaney

发明人： Guozhu Long ,  Jim Beaney

IPC分类号： H04L516

CPC分类号： H04L7/0029 ,  H04L7/027

摘要： The taps of an equalizer are used as inputs to a discrete Fourier transform (DFT). Certain spectral components are extracted from the DFT and used to estimate the frequency difference. The frequency difference estimate is filtered using a phase locked loop and used to adjust one clock to synchronize the transmit and receive clocks.

摘要翻译： 均衡器的抽头被用作离散傅里叶变换（DFT）的输入。 从DFT提取某些频谱分量，用于估计频差。 使用锁相环对频差估计进行滤波，并用于调整一个时钟以同步发送和接收时钟。

公开(公告)号：US5926505A

公开(公告)日：1999-07-20

申请号：US731500

申请日：1996-10-16

申请人： Guozhu Long

发明人： Guozhu Long

IPC分类号： H04L25/49 ,  H04B1/38

CPC分类号： H04L25/4927

摘要： Modem technology is implemented in a system including a personal computer (PC) to enable communication over a PSTN using communication software which includes a mapping algorithm for mapping data into u-law signal points, which are divided into segments with different distances.

摘要翻译： 调制解调器技术在包括个人计算机（PC）的系统中实现，以使得能够通过PSTN使用通信软件进行通信，所述通信软件包括用于将数据映射到u律信号点的映射算法，所述映射算法被划分为具有不同距离的段。

公开(公告)号：US5428641A

公开(公告)日：1995-06-27

申请号：US97343

申请日：1993-07-23

申请人： Guozhu Long

发明人： Guozhu Long

IPC分类号： H04L27/34 ,  H04L27/04

CPC分类号： H04L27/34

摘要： A device (500) and method (400) for zero-padding constellation switching with frame mapping provides reduced complexity for mapping frames having possibly a fractional number of bits and a predetermined number of symbols while eliminating the usual disadvantages of constellation switching.

摘要翻译： 用于利用帧映射进行零填充星座切换的装置（500）和方法（400）提供了降低的复杂度，用于对具有分数位数和预定数量的符号的帧进行映射，同时消除了星座切换的常见缺点。

公开(公告)号：US08750492B2

公开(公告)日：2014-06-10

申请号：US12690757

申请日：2010-01-20

申请人： Raphael Jean Cendrillon ,  Guozhu Long

发明人： Raphael Jean Cendrillon ,  Guozhu Long

IPC分类号： H04M9/08

CPC分类号： H04B3/32 ,  H04B17/24 ,  H04L5/0048 ,  H04L5/006 ,  H04L25/0226 ,  H04M3/002 ,  H04M3/2209 ,  H04M3/304 ,  H04M3/34

摘要： An apparatus comprising a receiver coupled to a digital subscriber line (DSL) between an exchange site and a customer premise equipment (CPE) and configured to send a feedback error message to train a precoder coupled to the exchange site, wherein the feedback error message comprises a plurality of error components and an indication of a quantity of bits per error component, a quantization accuracy per error component, or both. Included is a method comprising sending an error feedback message to a DSL crosstalk precoder to train the crosstalk precoder, wherein the error feedback message comprises an error vector and a quantization scaling factor of the error vector.

摘要翻译： 一种装置，包括耦合到交换站点和客户驻地设备（CPE）之间的数字用户线路（DSL）的接收机，并且被配置为发送反馈错误消息以训练耦合到所述交换站点的预编码器，其中所述反馈错误消息包括 多个误差分量以及每个误差分量的比特量的指示，每个误差分量的量化精度或两者。 包括的方法包括向DSL串扰预编码器发送错误反馈消息以训练串扰预编码器，其中误差反馈消息包括误差向量和误差向量的量化缩放因子。

公开(公告)号：US08693676B2

公开(公告)日：2014-04-08

申请号：US12756105

申请日：2010-04-07

申请人： Ruijie Xiao ,  Guozhu Long ,  Zhilei Zhao

发明人： Ruijie Xiao ,  Guozhu Long ,  Zhilei Zhao

IPC分类号： H03F3/04 ,  H04L25/02 ,  H04B3/00

CPC分类号： H04M3/007 ,  H04L5/0007 ,  H04L25/0272 ,  H04L25/028 ,  H04L27/2626

摘要： An apparatus comprising a first line driver, a second line driver, a charge pump, and a control logic circuit coupled to the first line driver and the second line driver and configured to disable the charge pump when both a first control signal associated with the first line driver and a second control signal associated with the second line driver indicate a charge pump disable state. A network component comprising at least one processor configured to implement a method comprising receiving a first control signal and a second control signal, disabling a charge pump when both the first control signal and the second control signal indicate a charge pump disable state, and operating the charge pump to boost a voltage when the first control signal, the second control signal, or both indicate a charge pump active state.

摘要翻译： 一种装置，包括耦合到第一线路驱动器和第二线路驱动器的第一线路驱动器，第二线路驱动器，电荷泵和控制逻辑电路，并且被配置为当与第一线路驱动器和第二线路驱动器相关联的第一控制信号 线路驱动器和与第二线路驱动器相关联的第二控制信号指示电荷泵禁用状态。 一种网络部件，包括至少一个处理器，其被配置为实现包括接收第一控制信号和第二控制信号的方法，当所述第一控制信号和所述第二控制信号都指示电荷泵禁用状态时禁用电荷泵， 当第一控制信号，第二控制信号或两者都指示电荷泵活动状态时，电荷泵升压电压。

公开(公告)号：US08432955B2

公开(公告)日：2013-04-30

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。