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    System and method for optimizing digital subscriber line performance between transceivers from multiple manufacturers
    1.
    发明授权
    System and method for optimizing digital subscriber line performance between transceivers from multiple manufacturers 有权
    用于优化来自多个制造商的收发器之间的数字用户线路性能的系统和方法

    公开(公告)号：US07386040B1

    公开(公告)日：2008-06-10

    申请号：US11117252

    申请日：2005-04-28

    申请人： Lujing Cai ,  Ehud Langberg ,  Shareq Rahman ,  William H. Scholtz

    发明人： Lujing Cai ,  Ehud Langberg ,  Shareq Rahman ,  William H. Scholtz

    IPC分类号： H04L5/16

    CPC分类号： H04L5/1438 ,  H04L27/2608

    摘要： An improved ADSL modem is presented. The ADSL modem in cooperation with a remote ADSL modem will exchange manufacturer identification information during initial DSL system training to establish a DSL communication link. The improved ADSL modem may comprise a memory device containing system parameters and operational algorithms previously determined to maximize DSL link performance between ADSL modems manufactured by different vendors. The improved ADSL modem is well suited for central office applications as it provides a solution for optimizing system performance that is transparent to remotely located ADSL modems. An ADSL modem in accordance with the present invention may comprise a digital signal processor and a memory device configured to store appropriate system parameters and operational algorithms that provide an optimized DSL communication link once applied during system initialization. The present invention also provides a method for optimizing DSL system performance. The method can be described by the following steps: supplying a default manufacturer identification for a remote modem at a master modem; applying appropriate system parameters and algorithms in response to the default manufacturer identification; initializing DSL system start-up training; receiving the actual manufacturer identification for the remote modem; determining if the current system parameters and algorithms are suitable for a DSL link with the actual manufacturer; adjusting training parameters and algorithms; restarting training when required; and establishing the DSL link.

    摘要翻译： 提出了一种改进的ADSL调制解调器。 与远程ADSL调制解调器协作的ADSL调制解调器将在初始DSL系统训练期间交换制造商识别信息以建立DSL通信链路。 改进的ADSL调制解调器可以包括存储设备，该存储器设备包含先前确定的用于最大化由不同供应商制造的ADSL调制解调器之间的DSL链路性能的系统参数和操作算法。 改进的ADSL调制解调器非常适合中央办公室应用，因为它提供了一种解决方案，以优化对远程定位的ADSL调制解调器透明的系统性能。 根据本发明的ADSL调制解调器可以包括数字信号处理器和被配置为存储在系统初始化期间一旦应用的提供优化的DSL通信链路的适当系统参数和操作算法的存储器设备。 本发明还提供了一种优化DSL系统性能的方法。 该方法可以通过以下步骤来描述：在主调制解调器处提供远程调制解调器的默认制造商标识; 根据默认的制造商标识应用适当的系统参数和算法; 初始化DSL系统启动培训; 接收远程调制解调器的实际制造商标识; 确定当前的系统参数和算法是否适合于与实际制造商的DSL链路; 调整训练参数和算法; 需要时重新开始训练; 并建立DSL链路。

    System and method for optimizing digital subscriber line performance between transceivers from multiple manufacturers
    2.
    发明授权
    System and method for optimizing digital subscriber line performance between transceivers from multiple manufacturers 失效
    用于优化来自多个制造商的收发器之间的数字用户线路性能的系统和方法

    公开(公告)号：US06967996B1

    公开(公告)日：2005-11-22

    申请号：US09732456

    申请日：2000-12-06

    申请人： Lujing Cai ,  Ehud Langberg ,  Shareq Rahman ,  William H. Scholtz

    发明人： Lujing Cai ,  Ehud Langberg ,  Shareq Rahman ,  William H. Scholtz

    IPC分类号： H04L5/14 ,  H04L5/16 ,  H04L27/26

    CPC分类号： H04L5/1438 ,  H04L27/2608

    摘要： An improved ADSL modem is presented. The ADSL modem in cooperation with a remote ADSL modem will exchange manufacturer identification information during initial DSL system training to establish a DSL communication link. The improved ADSL modem may comprise a memory device containing system parameters and operational algorithms previously determined to maximize DSL link performance between ADSL modems manufactured by different vendors. The improved ADSL modem is well suited for central office applications as it provides a solution for optimizing system performance that is transparent to remotely located ADSL modems. An ADSL modem in accordance with the present invention may comprise a digital signal processor and a memory device configured to store appropriate system parameters and operational algorithms that provide an optimized DSL communication link once applied during system initialization. The present invention also provides a method for optimizing DSL system performance. The method can be described by the following steps: supplying a default manufacturer identification for a remote modem at a master modem; applying appropriate system parameters and algorithms in response to the default manufacturer identification; initializing DSL system start-up training; receiving the actual manufacturer identification for the remote modem; determining if the current system parameters and algorithms are suitable for a DSL link with the actual manufacturer; adjusting training parameters and algorithms; restarting training when required; and establishing the DSL link.

    摘要翻译： 提出了一种改进的ADSL调制解调器。 与远程ADSL调制解调器协作的ADSL调制解调器将在初始DSL系统训练期间交换制造商识别信息以建立DSL通信链路。 改进的ADSL调制解调器可以包括存储设备，该存储器设备包含先前确定的用于最大化由不同供应商制造的ADSL调制解调器之间的DSL链路性能的系统参数和操作算法。 改进的ADSL调制解调器非常适合中央办公室应用，因为它提供了一种解决方案，以优化对远程定位的ADSL调制解调器透明的系统性能。 根据本发明的ADSL调制解调器可以包括数字信号处理器和被配置为存储在系统初始化期间一旦应用的提供优化的DSL通信链路的适当系统参数和操作算法的存储器设备。 本发明还提供了一种优化DSL系统性能的方法。 该方法可以通过以下步骤来描述：在主调制解调器处提供远程调制解调器的默认制造商标识; 根据默认的制造商标识应用适当的系统参数和算法; 初始化DSL系统启动培训; 接收远程调制解调器的实际制造商标识; 确定当前的系统参数和算法是否适合于与实际制造商的DSL链路; 调整训练参数和算法; 需要时重新开始训练; 并建立DSL链路。

    Systems and Methods for Improved Bit-Loading for Discrete Multi-Tone Modulated Multiple Latency Applications
    5.
    发明申请
    Systems and Methods for Improved Bit-Loading for Discrete Multi-Tone Modulated Multiple Latency Applications 有权
    用于离散多音调制多时延应用的改进位加载的系统和方法

    公开(公告)号：US20070110176A1

    公开(公告)日：2007-05-17

    申请号：US11559772

    申请日：2006-11-14

    申请人： Yan Wu ,  Lujing Cai ,  William Scholtz ,  Ehud Langberg

    发明人： Yan Wu ,  Lujing Cai ,  William Scholtz ,  Ehud Langberg

    IPC分类号： H04K1/10

    CPC分类号： H04L27/2608 ,  H04L1/0006 ,  H04L1/0009 ,  H04L1/0057 ,  H04L1/0058 ,  H04L1/006 ,  H04L1/007 ,  H04L5/14

    摘要： Systems and methods for performing bit loading in a dual latency data transmission system. In a computer network, such as an XDSL-based network, carrier channels are allocated between two latency paths. Error sensitive information is transmitted over a latency path employing one or more forward error correction techniques. Latency sensitive information that is relatively more tolerant of errors is transmitted over the other latency path. Rather than employing the lowest coding gain for carrier channels having the two different latency paths, the highest coding gain for each path is used by applying different target S-N-R margins for carrier channels having different latency paths.

    摘要翻译： 用于在双延迟数据传输系统中执行比特加载的系统和方法。 在诸如基于XDSL的网络的计算机网络中，在两个等待时间路径之间分配载波信道。 误差敏感信息通过采用一个或多个前向纠错技术的等待时间路径传输。 通过另一个等待时间路径发送相对更容忍错误的延迟敏感信息。 不是对具有两个不同等待时间路径的载波信道采用最低的编码增益，而是通过对具有不同等待时间路径的载波信道应用不同的目标S-N-R边缘来使用每个路径的最高编码增益。

    Systems and methods for improved bit loading for discrete multi-tone modulated multiple latency applications
    6.
    发明授权
    Systems and methods for improved bit loading for discrete multi-tone modulated multiple latency applications 有权
    用于离散多色调多个延迟应用的改进位加载的系统和方法

    公开(公告)号：US07813434B2

    公开(公告)日：2010-10-12

    申请号：US11559772

    申请日：2006-11-14

    申请人： Yan Wu ,  Lujing Cai ,  William Scholtz ,  Ehud Langberg

    发明人： Yan Wu ,  Lujing Cai ,  William Scholtz ,  Ehud Langberg

    IPC分类号： H04K1/10 ,  H04L27/28

    CPC分类号： H04L27/2608 ,  H04L1/0006 ,  H04L1/0009 ,  H04L1/0057 ,  H04L1/0058 ,  H04L1/006 ,  H04L1/007 ,  H04L5/14

    摘要： Systems and methods for performing bit loading in a dual latency data transmission system. In a computer network, such as an XDSL-based network, carrier channels are allocated between two latency paths. Error sensitive information is transmitted over a latency path employing one or more forward error correction techniques. Latency sensitive information that is relatively more tolerant of errors is transmitted over the other latency path. Rather than employing the lowest coding gain for carrier channels having the two different latency paths, the highest coding gain for each path is used by applying different target S-N-R margins for carrier channels having different latency paths.

    摘要翻译： 用于在双延迟数据传输系统中执行比特加载的系统和方法。 在诸如基于XDSL的网络的计算机网络中，在两个等待时间路径之间分配载波信道。 误差敏感信息通过采用一个或多个前向纠错技术的等待时间路径传输。 通过另一个等待时间路径发送相对更容忍错误的延迟敏感信息。 不是对具有两个不同等待时间路径的载波信道采用最低的编码增益，而是通过对具有不同等待时间路径的载波信道应用不同的目标S-N-R边缘来使用每个路径的最高编码增益。

    Systems and methods for adaptive VDSL with variable sampling frequency and time-domain equalizer
    7.
    发明授权
    Systems and methods for adaptive VDSL with variable sampling frequency and time-domain equalizer 有权
    具有可变采样频率和时域均衡器的自适应VDSL的系统和方法

    公开(公告)号：US07352805B2

    公开(公告)日：2008-04-01

    申请号：US11282109

    申请日：2005-11-18

    申请人： Ehud Langberg ,  Lujing Cai

    发明人： Ehud Langberg ,  Lujing Cai

    IPC分类号： H03H7/30

    CPC分类号： H04L5/1438 ,  H04B17/0085 ,  H04L25/03012 ,  H04L25/03019 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2628 ,  H04L27/265 ,  H04L2025/03414 ,  H04L2025/03445 ,  H04L2025/03585

    摘要： A method and system for enhancing reach-performance of a multi-carrier VDSL System estimates loop length, estimates maximum available bandwidth that can be utilized at that particular loop length, optimally selects an FFT size and sampling rate, and decides whether to apply a time domain equalization to its receiver and if so, selects a cyclic extension size. To minimize the implementation complexity, the sampling frequencies at receiver and transmitter are lowered to match the actual usable bandwidth. The FFT/IFFT sizes in the implementation are also required to set appropriately accordingly.

    摘要翻译： 一种用于增强多载波VDSL系统的达到性能的方法和系统估计环路长度，估计可以在该特定环路长度下使用的最大可用带宽，最佳地选择FFT大小和采样率，并且决定是否应用时间 域均衡到其接收器，如果是，则选择循环扩展大小。 为了最小化实现复杂度，降低接收机和发射机的采样频率以匹配实际可用带宽。 执行中的FFT / IFFT大小也需要适当地进行设置。

    System and method of echo cancellation
    9.
    发明申请
    System and method of echo cancellation 有权
    回声消除的系统和方法

    公开(公告)号：US20060114976A1

    公开(公告)日：2006-06-01

    申请号：US11197524

    申请日：2005-08-05

    申请人： Ehud Langberg ,  Lujing Cai ,  Avi Rapaport

    发明人： Ehud Langberg ,  Lujing Cai ,  Avi Rapaport

    IPC分类号： H04L5/16 ,  H04K1/10

    CPC分类号： H04B3/23

    摘要： An economic low-complexity system and method for echo cancellation are disclosed. The system and method are particularly suited for multi-carrier VDSL using the U0 band. The techniques taught herein may be implemented in VDSL and VDSL2 systems and used to receive signals in three bands (e.g., U0, U1 and U2) simultaneously.

    摘要翻译： 公开了用于回波消除的经济低复杂度系统和方法。 该系统和方法特别适用于使用U0频段的多载波VDSL。 本文教导的技术可以在VDSL和VDSL2系统中实现，并且用于同时在三个频带（例如，U0，U1和U2）中接收信号。

    Systems and methods for adaptive VDSL with variable sampling frequency and time-domain equalizer
    10.
    发明申请
    Systems and methods for adaptive VDSL with variable sampling frequency and time-domain equalizer 有权
    具有可变采样频率和时域均衡器的自适应VDSL的系统和方法

    公开(公告)号：US20060104339A1

    公开(公告)日：2006-05-18

    申请号：US11282109

    申请日：2005-11-18

    申请人： Ehud Langberg ,  Lujing Cai

    发明人： Ehud Langberg ,  Lujing Cai

    IPC分类号： H04L5/16 ,  H04K1/10

    CPC分类号： H04L5/1438 ,  H04B17/0085 ,  H04L25/03012 ,  H04L25/03019 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2628 ,  H04L27/265 ,  H04L2025/03414 ,  H04L2025/03445 ,  H04L2025/03585

    摘要： A method and system for enhancing reach-performance of a multi-carrier VDSL System estimates loop length, estimates maximum available bandwidth that can be utilized at that particular loop length, optimally selects an FFT size and sampling rate, and decides whether to apply a time domain equalization to its receiver and if so, selects a cyclic extension size. To minimize the implementation complexity, the sampling frequencies at receiver and transmitter are lowered to match the actual usable bandwidth. The FFT/IFFT sizes in the implementation are also required to set appropriately accordingly.

    摘要翻译： 一种用于增强多载波VDSL系统的达到性能的方法和系统估计环路长度，估计可以在该特定环路长度下使用的最大可用带宽，最佳地选择FFT大小和采样率，并且决定是否应用时间 域均衡到其接收器，如果是，则选择循环扩展大小。 为了最小化实现复杂度，降低接收机和发射机的采样频率以匹配实际可用带宽。 执行中的FFT / IFFT大小也需要适当地进行设置。