公开(公告)号：US09071333B2

公开(公告)日：2015-06-30

申请号：US12481307

申请日：2009-06-09

申请人： Liming Fang

发明人： Liming Fang

IPC分类号： H04B3/23 ,  H04B3/32 ,  H04B3/487

CPC分类号： H04B3/32 ,  H04B3/487

摘要： A method for canceling crosstalk, the method includes the steps of: filtering the signal corresponding to a far end crosstalk source in the frequency domain according to adaptive filter parameter; combining the received signal corresponding to a far end sending signal and the filtered signal in frequency domain corresponding to the far end crosstalk source. A device for canceling crosstalk and a signal processing system.

摘要翻译： 一种消除串扰的方法，该方法包括以下步骤：根据自适应滤波器参数对与频域中的远端串扰源相对应的信号进行滤波; 组合对应于远端发送信号的接收信号和对应于远端串扰源的频域中的滤波信号。 用于消除串扰的装置和信号处理系统。

公开(公告)号：US08908749B2

公开(公告)日：2014-12-09

申请号：US12551246

申请日：2009-08-31

申请人： Liming Fang

发明人： Liming Fang

IPC分类号： H04B1/38 ,  H04M11/06 ,  H04L25/08 ,  H04B3/32 ,  H04L25/03 ,  H04L27/26

CPC分类号： H04L25/085 ,  H04B3/32 ,  H04L25/03828 ,  H04L27/2601 ,  H04M11/062

摘要： A method for controlling DSL transmission power includes: determining a group to which a line belongs, and selecting a representative line from each group to form a line model; obtaining a crosstalk model of the line model; obtaining Transmit Power Spectrum Density (TxPSD) of each representative line in the line model according to the crosstalk model, and converting the TxPSD into a spectrum control parameter; and enhancing the line rate according to the spectrum control parameter. An apparatus for controlling DSL transmission power is also disclosed. Through the method, the transmission power of the band that incurs serious line crosstalk is restricted, and the line that incurs serious crosstalk can achieve higher transmission rates. Therefore, the adverse impact from the crosstalk between xDSL lines is reduced, and the line works in the optimum state.

摘要翻译： 一种用于控制DSL传输功率的方法包括：确定一条线路所属的组，并从每个组中选择一条代表线以形成线路模型; 获得线模型的串扰模型; 根据串扰模型获得线路模型中每个代表线的发射功率谱密度（TxPSD），并将TxPSD转换为频谱控制参数; 并根据频谱控制参数提高线路速率。 还公开了一种用于控制DSL传输功率的装置。 通过该方法，导致严重线路串扰的频带的发射功率受到限制，并且导致严重串扰的线路可以实现更高的传输速率。 因此，xDSL线路之间串扰的不利影响降低，线路处于最佳状态。

公开(公告)号：US08873565B2

公开(公告)日：2014-10-28

申请号：US13447748

申请日：2012-04-16

申请人： Liming Fang ,  Jim Chen ,  Kira Zhang

发明人： Liming Fang ,  Jim Chen ,  Kira Zhang

IPC分类号： H04L12/56

CPC分类号： H04B10/2575 ,  H04B10/27 ,  H04J14/08 ,  H04L12/00 ,  H04Q11/0067 ,  H04Q11/0071 ,  H04Q2011/0064 ,  H04Q2011/0086

摘要： An apparatus for interconnecting a fiber-optic network and a coax network comprising a coax line terminal (CLT) configured to couple to an optical line terminal (OLT) at the fiber-optic network and a plurality of coax network units (CNUs) at the coax network and to cache data received from the CNUs and forward the cached data to the OLT upon receiving a message from the OLT that assigns a transmission cycle for a specified CNU, wherein the CLT forwards the cached data to the OLT upon receiving the message regardless of whether the cached data corresponds to the specified CNU.

摘要翻译： 一种用于互连光纤网络和同轴电缆网络的装置，包括被配置为耦合到光纤网络处的光线路终端（OLT）的同轴线路终端（CLT）和在该光纤网络处的多个同轴电缆网络单元（CNU） 同轴网络和缓存从CNU接收的数据，并且在从OLT接收到为指定的CNU分配传输周期的消息时将缓存的数据转发到OLT，其中CLT在接收到消息时将缓存的数据转发到OLT 缓存数据是否对应于指定的CNU。

公开(公告)号：US08711669B2

公开(公告)日：2014-04-29

申请号：US13484760

申请日：2012-05-31

申请人： Liming Fang ,  Jie Lv ,  Huishen Dong

发明人： Liming Fang ,  Jie Lv ,  Huishen Dong

IPC分类号： H04M11/00

CPC分类号： H04M11/062 ,  H04B3/32

摘要： An xDSL signal transmission method includes: receiving 2N−1 signals from 2N−1 signal input ends, where each signal in the 2N−1 signals is a signal transmitted by an independent channel in the xDSL system; pre-multiplying a (2N−1)×1 matrix formed by the 2N−1 signals by a first conversion matrix to obtain a 2N×1 matrix, where elements in the 2N×1 matrix respectively correspond to 2N signals, and the first conversion matrix is a 2N×(2N−1) matrix; and sending the 2N signals via N twisted pair lines respectively. The N twisted pair lines can transmit signals of 2N−1 channels, thereby increasing the number of signal transmissions, and improving signal transmission efficiency.

摘要翻译： xDSL信号发送方法包括：从2N-1个信号输入端接收2N-1个信号，其中2N-1个信号中的每个信号是由xDSL系统中的独立信道发送的信号; 将由2N-1信号形成的（2N-1）×1矩阵预先乘以第一转换矩阵，以获得2N×1矩阵，其中2N×1矩阵中的元素分别对应于2N个信号，并且第一转换 矩阵是2N×（2N-1）矩阵; 并分别通过N条双绞线发送2N个信号。 N双绞线可以发送2N-1个信道的信号，从而增加信号传输的数量，提高信号传输效率。

公开(公告)号：US08295369B2

公开(公告)日：2012-10-23

申请号：US13271903

申请日：2011-10-12

申请人： Liming Fang

发明人： Liming Fang

IPC分类号： H04B3/32 ,  H04B15/00 ,  H04J1/12 ,  H04L27/28

CPC分类号： H04B3/32 ,  H04B1/62 ,  H04J1/12 ,  H04L2012/6478

摘要： A method for remote crosstalk cancellation, includes: filtering, at a first transmitting end which is connected to a first receiving end over a first line, crosstalk source signals according to values of filtering parameters; synthesizing, at the first transmitting end, a first signal to be transmitted over the first line and the filtered crosstalk source signals; transmitting the synthesized signal from the first transmitting end to the first receiving end over the first line; receiving, at the first transmitting end, a noise statistic related value fed back from the first receiving end; and adjusting, at the transmitting end, the values of the filtering parameters according to the noise statistic related value. A corresponding device and a signal processing system for remote crosstalk cancellation are provided.

公开(公告)号：US20120207197A1

公开(公告)日：2012-08-16

申请号：US13371854

申请日：2012-02-13

申请人： Jie LV ,  Liming Fang

发明人： Jie LV ,  Liming Fang

IPC分类号： H04B17/00

CPC分类号： H04M11/062 ,  H04B3/32

摘要： In the field of communication, this application discloses a signal processing method, device, and system of bonded DSL channels. A signal processing method of bonded DSL channels: sending a pilot sequence to a receiving end through bonded channels; receiving, through the bonded channels, clipped error sample fragments returned by the receiving end, where the receiving end constructs a clipped error sample according to an error of a received signal and fragments the clipped error sample to acquire the clipped error sample fragments; aggregating the received clipped error sample fragments into a clipped error sample; and calculating a pre-encoding coefficient according to the pilot sequence and the aggregated clipped error sample, where the pre-encoding coefficient is used to perform pre-encoding processing on a signal before the signal is sent.

摘要翻译： 在通信领域中，本申请公开了一种信号处理方法，装置和绑定DSL信道的系统。 一种绑定DSL信道的信号处理方法：通过绑定信道向接收端发送导频序列; 通过绑定通道接收由接收端返回的剪辑的错误样本片段，其中接收端根据接收到的信号的错误构建剪切的错误样本，并将剪切的错误样本分片以获取剪切的错误样本片段; 将接收到的剪辑错误样本片段聚合为剪辑错误样本; 以及根据导频序列和聚合剪切误差样本计算预编码系数，其中预编码系数用于对发送信号之前的信号执行预编码处理。

公开(公告)号：US08958515B2

公开(公告)日：2015-02-17

申请号：US13096454

申请日：2011-04-28

申请人： Yi Cai ,  Ivan Chan ,  Liming Fang ,  Max J. Olsen

发明人： Yi Cai ,  Ivan Chan ,  Liming Fang ,  Max J. Olsen

IPC分类号： H04L7/00 ,  H04L25/00 ,  H04L25/40 ,  G06G7/16 ,  G01R31/317 ,  H04B15/04

CPC分类号： G06G7/16 ,  G01R31/31709 ,  H04B15/04 ,  H04L7/00

摘要： A system for controllably generating jitter in a serial data stream includes a frequency generator and first and second mixers. The frequency generator is configured to output in-phase and quadrature local oscillator signals with a local oscillator frequency of at least about 5 MHz. The local oscillator frequency varies between a selectable minimum frequency and a selectable maximum frequency. The first mixer is configured to mix a fixed frequency clock signal with the in-phase local oscillator signal to output a first mixer output. The second mixer is configured to mix the fixed frequency clock signal with the quadrature local oscillator signal to output a second mixer output. An adder is configured to add the first and second mixer outputs to produce a frequency-modulated clock signal with a frequency that is about the sum of the fixed frequency and the local oscillator frequency and includes a periodic jitter.

摘要翻译： 用于可控制地产生串行数据流中的抖动的系统包括频率发生器和第一和第二混频器。 频率发生器被配置为输出具有至少约5MHz的本地振荡器频率的同相和正交本地振荡器信号。 本地振荡器频率在可选择的最小频率和可选择的最大频率之间变化。 第一混频器被配置为将固定频率时钟信号与同相本地振荡器信号混频以输出第一混频器输出。 第二混频器被配置为将固定频率时钟信号与正交本地振荡器信号混频以输出第二混频器输出。 加法器被配置为添加第一和第二混频器输出以产生频率约为固定频率和本地振荡器频率之和的频率调制时钟信号，并且包括周期性抖动。

公开(公告)号：US08842991B2

公开(公告)日：2014-09-23

申请号：US13535581

申请日：2012-06-28

申请人： Haixiang Liang ,  Liming Fang ,  Jim Chen ,  Hesham El Bakoury

发明人： Haixiang Liang ,  Liming Fang ,  Jim Chen ,  Hesham El Bakoury

IPC分类号： H04B10/00 ,  H04Q11/00 ,  H04L12/28

CPC分类号： H04Q11/0067 ,  H04L12/2801 ,  H04Q11/0071 ,  H04Q2011/0079

摘要： A method in a network device for providing end-to-end connection in a unified optical and coax network, comprising receiving at an integrated node device (IND) a frame from an optical line terminal (OLT), wherein the frame comprises a data frame and a logical link identifier (LLID), and placing the data in a one of a plurality of buffers based on the LLID, wherein the one of the plurality of buffers corresponds to a customer premises equipment (CPE) associated with the LLID, wherein the data frame stays intact in a media access control (MAC) layer.

摘要翻译： 一种网络设备中的方法，用于在统一的光学和同轴电缆网络中提供端到端连接，包括在集成节点设备（IND）处接收来自光线路终端（OLT）的帧，其中所述帧包括数据帧 以及逻辑链路标识符（LLID），以及基于所述LLID将所述数据放置在多个缓冲器中的一个缓冲器中，其中所述多个缓冲器中的一个对应于与所述LLID相关联的客户驻地设备（CPE），其中 数据帧在媒体访问控制（MAC）层中保持不变。

公开(公告)号：US08792568B2

公开(公告)日：2014-07-29

申请号：US13612222

申请日：2012-09-12

申请人： Liming Fang

发明人： Liming Fang

IPC分类号： H04B3/32 ,  H04B15/00 ,  H04J1/12 ,  H04L27/28

CPC分类号： H04B3/32 ,  H04B1/62 ,  H04J1/12 ,  H04L2012/6478

摘要： A method for remote crosstalk cancellation in an xDSL system is provided. The method includes: receiving, at a first transmitting end, a noise statistic related value fed back from a first receiving end, wherein the noise statistic related value reflects a numeric value of a signal-to-noise ratio of a first line; pre-coding, at the first transmitting end, the first signal and crosstalk source signals according to values of filtering parameters; and transmitting the pre-coded signals. A corresponding device for remote crosstalk cancellation is provided.

摘要翻译： 提供了一种在xDSL系统中进行远程串扰消除的方法。 该方法包括：在第一发送端接收从第一接收端反馈的噪声统计相关值，其中所述噪声统计相关值反映第一行的信噪比的数值; 根据滤波参数的值，在第一发送端预编码第一信号和串扰源信号; 并发送预编码信号。 提供了用于远程串扰消除的相应设备。

公开(公告)号：US08537882B2

公开(公告)日：2013-09-17

申请号：US13097950

申请日：2011-04-29

申请人： Liming Fang ,  Raphael Cendrillon ,  Pengrui Zhang

发明人： Liming Fang ,  Raphael Cendrillon ,  Pengrui Zhang

IPC分类号： H04B1/38 ,  H04L5/16

CPC分类号： H04B3/32 ,  H04M11/062

摘要： A method, a system, and a device for rapidly exiting training are provided. The method includes: in a training procedure of a Vectored-Digital Subscriber Line (DSL) filter, comparing a feedback error value of the filter and/or a swing range of a filter coefficient with a preset threshold, and determining whether the filter meets a convergence condition according to a comparison result; and exiting the training procedure of the filter when the filter meets the convergence condition. The method, system, and device are applicable to a training procedure of a Vectored-DSL precoder or canceller, so as to rapidly exit the training procedure.

摘要翻译： 提供了一种用于快速退出训练的方法，系统和装置。 该方法包括：在向量数字用户线（DSL）滤波器的训练过程中，将滤波器的反馈误差值和/或滤波器系数的摆动范围与预设阈值进行比较，以及确定滤波器是否满足 收敛条件根据比较结果; 并且当滤波器满足收敛条件时退出滤波器的训练过程。 方法，系统和设备适用于Vectored-DSL预编码器或消除器的训练程序，以便迅速退出训练程序。