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1. 发明申请

US20120275591A1 Systems and Methods for G.Vector Initialization 有权
标题翻译： G.Vector初始化的系统和方法
公开(公告)号：US20120275591A1
公开(公告)日：2012-11-01
申请号：US13458865
申请日：2012-04-27
申请人： Amitkumar Mahadevan , Kevin D. Fisher , Nicholas P. Sands
发明人： Amitkumar Mahadevan , Kevin D. Fisher , Nicholas P. Sands
IPC分类号： H04M1/76
CPC分类号： H04M11/062 , H04B3/32
摘要： Methods, apparatuses (e.g., DSL system hardware, DSL systems, vectoring control entities), techniques, systems, etc. are used for initializing one or more DSL lines joining a vectored DSL line group operating in Showtime. A super-periodic orthogonal pilot sequence from a set of super-periodic orthogonal pilot sequences is assigned to each joining DSL line, wherein each such super-periodic orthogonal pilot sequence in the set has length L and is orthogonal to other sequences in the set over length T. These super-periodic orthogonal pilot sequences are used on the joining DSL lines to generate at least T sync-symbols worth of initialization data, which is processed to generate initialization data and FEXT mitigation coefficients for use when the joining DSL lines become part of the vectored DSL line group.
摘要翻译：方法，装置（例如，DSL系统硬件，DSL系统，向量控制实体），技术，系统等用于初始化连接在Showtime中操作的向量DSL线路组的一个或多个DSL线路。从一组超周期正交导频序列的超周期正交导频序列被分配给每个加入DSL线，其中集合中的每个这样的超周期正交导频序列具有长度L，并且与组中的其他序列正交这些超周期正交导频序列用于加入DSL线路以产生至少T个同步符号的初始化数据，其被处理以产生初始化数据和当加入DSL线路成为部分时使用的FEXT缓解系数的矢量DSL线组。

2. 发明授权

US09270831B2 Systems and methods for G.vector initialization 有权
标题翻译： G.vector初始化的系统和方法
公开(公告)号：US09270831B2
公开(公告)日：2016-02-23
申请号：US13458865
申请日：2012-04-27
申请人： Amitkumar Mahadevan , Kevin D. Fisher , Nicholas P. Sands
发明人： Amitkumar Mahadevan , Kevin D. Fisher , Nicholas P. Sands
IPC分类号： H04M11/06 , H04B3/32
CPC分类号： H04M11/062 , H04B3/32
摘要： Methods, apparatuses (e.g., DSL system hardware, DSL systems, vectoring control entities), techniques, systems, etc. are used for initializing one or more DSL lines joining a vectored DSL line group operating in Showtime. A super-periodic orthogonal pilot sequence from a set of super-periodic orthogonal pilot sequences is assigned to each joining DSL line, wherein each such super-periodic orthogonal pilot sequence in the set has length L and is orthogonal to other sequences in the set over length T. These super-periodic orthogonal pilot sequences are used on the joining DSL lines to generate at least T sync-symbols worth of initialization data, which is processed to generate initialization data and FEXT mitigation coefficients for use when the joining DSL lines become part of the vectored DSL line group.
摘要翻译：方法，装置（例如，DSL系统硬件，DSL系统，向量控制实体），技术，系统等用于初始化连接在Showtime中操作的向量DSL线路组的一个或多个DSL线路。从一组超周期正交导频序列的超周期正交导频序列被分配给每个加入DSL线，其中集合中的每个这样的超周期正交导频序列具有长度L，并且与组中的其他序列正交这些超周期正交导频序列用于加入DSL线路以产生至少T个同步符号的初始化数据，其被处理以产生初始化数据和当加入DSL线路成为部分时使用的FEXT缓解系数的矢量DSL线组。

3. 发明授权

US08780686B2 Reduced memory vectored DSL 有权
标题翻译：减少存储器矢量DSL
公开(公告)号：US08780686B2
公开(公告)日：2014-07-15
申请号：US13189095
申请日：2011-07-22
申请人： Nicholas P. Sands , Stephanie F. Pereira , Darren B. Hutchinson , Kevin D. Fisher , Amitkumar Mahadevan
发明人： Nicholas P. Sands , Stephanie F. Pereira , Darren B. Hutchinson , Kevin D. Fisher , Amitkumar Mahadevan
IPC分类号： H04J1/12 , H04B3/20
CPC分类号： H04B3/32
摘要： The memory storage, transmission and processing demands of a vectored DSL system are reduced by sampling a subset of DSL tones in the DSL tone range used in the vectored system. This data is smoothed (denoised) to further reduce the data's size, sacrificing some fidelity or precision as a result. Finally, lossless entropy coding or the like is performed to encode the FEXT cancellation data for storage and use. The resulting data is less likely to cause transmission bottlenecks in the vectored system, can be stored and used more efficiently for both on-chip and off-chip vectoring implementations, and can be readily updated in various ways.
摘要翻译：矢量DSL系统的存储器存储，传输和处理需求通过在矢量系统中使用的DSL音调范围中采样DSL音调的子集来减少。该数据被平滑（去噪），以进一步减少数据的大小，从而牺牲一些保真度或精度。最后，执行无损熵编码等以对用于存储和使用的FEXT取消数据进行编码。所得到的数据不太可能导致向量系统中的传输瓶颈，可以在片上和片外向量实现方面更有效地存储和使用，并且可以以各种方式容易地更新。

4. 发明申请

US20120020418A1 REDUCED MEMORY VECTORED DSL 有权
标题翻译：减少存储量的DSL
公开(公告)号：US20120020418A1
公开(公告)日：2012-01-26
申请号：US13189095
申请日：2011-07-22
申请人： Nicholas Philip Sands , Stephanie Felicia Pereira , Darren Bradley Hutchinson , Kevin D. Fisher , Amitkumar Mahadevan
发明人： Nicholas Philip Sands , Stephanie Felicia Pereira , Darren Bradley Hutchinson , Kevin D. Fisher , Amitkumar Mahadevan
IPC分类号： H04L27/00
CPC分类号： H04B3/32
摘要： The memory storage, transmission and processing demands of a vectored DSL system are reduced by sampling a subset of DSL tones in the DSL tone range used in the vectored system. This data is smoothed (denoised) to further reduce the data's size, sacrificing some fidelity or precision as a result. Finally, lossless entropy coding or the like is performed to encode the FEXT cancellation data for storage and use. The resulting data is less likely to cause transmission bottlenecks in the vectored system, can be stored and used more efficiently for both on-chip and off-chip vectoring implementations, and can be readily updated in various ways.
摘要翻译：矢量DSL系统的存储器存储，传输和处理需求通过在矢量系统中使用的DSL音调范围中采样DSL音调的子集来减少。该数据被平滑（去噪），以进一步减少数据的大小，从而牺牲一些保真度或精度。最后，执行无损熵编码等以对用于存储和使用的FEXT取消数据进行编码。所得到的数据不太可能导致向量系统中的传输瓶颈，可以在片上和片外向量实现方面更有效地存储和使用，并且可以以各种方式容易地更新。

5. 发明授权

US08817907B2 Systems and methods for signaling for vectoring of DSL systems 有权
标题翻译：用于DSL系统向量化的信令的系统和方法
公开(公告)号：US08817907B2
公开(公告)日：2014-08-26
申请号：US12412191
申请日：2009-03-26
申请人： Massimo Sorbara , Patrick Duvaut , Amitkumar Mahadevan , Laurent Francis Alloin
发明人： Massimo Sorbara , Patrick Duvaut , Amitkumar Mahadevan , Laurent Francis Alloin
IPC分类号： H04L27/10
CPC分类号： H04L1/0045 , H04L1/1671 , H04L1/243
摘要： The measurement of far-end crosstalk (FEXT) in a Digital Subscriber Line communications is instrumental in the ability of using a multiple input multiple output (MIMO) pre-coder to cancel FEXT. A reliable robust back channel for transmission of error is instrumental to provide error samples for the proper operation of a MIMO pre-coder. Bins can be dedicated to insure bandwidth from the customer premises equipment (CPE) to the central office (CO). By increasing the margin used in the bins, robustness can be added to this back channel between the CPE and CO.
摘要翻译：数字用户线路通信中远端串扰（FEXT）的测量有助于使用多输入多输出（MIMO）预编码器取消FEXT。用于错误传输的可靠的鲁棒后置信道对于为MIMO预编码器的正确操作提供错误样本是有用的。可以专门用于保证客户端设备（CPE）到中心局（CO）的带宽。通过增加机箱中使用的余量，可以在CPE和CO之间的后向通道中增加鲁棒性。

6. 发明授权

US08515017B2 Systems and methods for loop termination detection based on per-port calibration 失效
标题翻译：基于每端口校准的循环终止检测的系统和方法
公开(公告)号：US08515017B2
公开(公告)日：2013-08-20
申请号：US12044531
申请日：2008-03-07
申请人： Patrick Duvaut , Amitkumar Mahadevan , Vaibhav Dinesh
发明人： Patrick Duvaut , Amitkumar Mahadevan , Vaibhav Dinesh
IPC分类号： H04M1/24
CPC分类号： H04M3/302 , H04M3/085
摘要： Systems and methods for performing loop termination are described. One embodiment is a method that comprises receiving a per-port calibrated echo signal of a loop under test, receiving a region designation and a loop length for the loop under test, and determining whether the loop is terminated by a short or open termination based on phase of the per-port calibrated echo signal.
摘要翻译：描述用于执行环路终止的系统和方法。一个实施例是一种方法，其包括接收被测环路的每端口校准的回波信号，接收被测环路的区域指定和环路长度，以及基于基于每端口校准回波信号的相位。

7. 发明申请

US20110058468A1 Method and apparatus for crosstalk cancellation during SELT testing 有权
标题翻译： SELT测试期间串扰消除的方法和装置
公开(公告)号：US20110058468A1
公开(公告)日：2011-03-10
申请号：US12807524
申请日：2010-09-08
申请人： Shailendra K. Singh , Amitkumar Mahadevan , Laurent F. Alloin
发明人： Shailendra K. Singh , Amitkumar Mahadevan , Laurent F. Alloin
IPC分类号： H04J1/12
CPC分类号： H04M11/062 , H04B3/32 , H04B3/487 , H04M3/304 , H04M3/306 , H04M3/34 , H04M2203/056
摘要： A system for performing a single ended line test (SELT) of a selected subscriber line within a bundle of in-service subscriber lines each supporting frequency division multiplexed multi-tone modulated XDSL communications. The system comprises: a crosstalk cancellation module and a SELT module. The crosstalk cancellation module is coupled to the subscriber lines and configured to cancel crosstalk between the selected subscriber line under test and the in-service subscriber lines. The SELT module couples to the crosstalk cancellation module and is configured to coordinate SELT testing with the crosstalk cancellation module to cancel crosstalk between the selected subscriber line and the in-service subscriber lines during testing.
摘要翻译：一种用于在支持频分复用多音调调制的XDSL通信的一连串在用用户线路中执行所选用户线路的单端测试（SELT）的系统。该系统包括：串扰消除模块和SELT模块。串扰消除模块耦合到用户线路并且被配置为消除所选择的被测试用户线路与在线用户线路之间的串扰。 SELT模块耦合到串扰消除模块，并配置为与串扰消除模块协调SELT测试，以在测试期间消除所选用户线路和在用用户线路之间的串扰。

8. 发明申请

US20100086105A1 SYSTEMS AND METHODS FOR CHARACTERIZING LOOP TERMINATION VIA SINGLE-ENDED LINE TESTING 有权
标题翻译：通过单端测试来表征环路终止的系统和方法
公开(公告)号：US20100086105A1
公开(公告)日：2010-04-08
申请号：US12325541
申请日：2008-12-01
申请人： Vaibhav Dinesh , Kunal Raheja , Amitkumar Mahadevan , Patrick Duvaut
发明人： Vaibhav Dinesh , Kunal Raheja , Amitkumar Mahadevan , Patrick Duvaut
IPC分类号： H04M1/24
CPC分类号： H04M3/302
摘要： Disclosed are various embodiments for determining a state of loop termination. One embodiment comprises receiving an un-calibrated echo signal for the loop under test using frequency domain reflectometry single-ended line testing (FDR-SELT) and determining the state of loop termination based on phase of the un-calibrated echo signal. The step of determining the state of loop termination comprises determining whether the loop is terminated by an open termination or a short termination by correlating the phase of the echo signal with an expected phase of the echo signal derived from measurements taken at the same loop length for open and short terminations. For other embodiments, the amplitude of the un-calibrated echo signal is analyzed to determine whether the loop is terminated by a matched-impedance termination.
摘要翻译：公开了用于确定环路终止状态的各种实施例。一个实施例包括使用频域反射测试单端线测试（FDR-SELT）接收待测环路的未校准回波信号，并且基于未经校准的回波信号的相位确定环路终止状态。确定环路终止状态的步骤包括通过将回波信号的相位与从在相同环路长度处获取的测量得到的回波信号的预期相位相关联来确定环路是否由开放终止或短终端终止，开放和短暂终止。对于其他实施例，分析未校准的回波信号的幅度，以确定环路是否由匹配阻抗终端终止。

9. 发明申请

US20090310704A1 Low Complexity Systems and Methods for Peak-to-Average Ratio (PAR) Reduction Using Reserved Tones 有权
标题翻译：低复杂度系统和使用保留音调的峰值平均比（PAR）减少的方法
公开(公告)号：US20090310704A1
公开(公告)日：2009-12-17
申请号：US12138813
申请日：2008-06-13
申请人： Harish Jethanandani , Rahul Garg , Patrick Duvaut , Amitkumar Mahadevan
发明人： Harish Jethanandani , Rahul Garg , Patrick Duvaut , Amitkumar Mahadevan
IPC分类号： H04L27/00
CPC分类号： H04L27/2618
摘要： Systems and methods for reducing the peak-to-average ratio (PAR) at the transmitter can reduce the dynamic range required in various analog components. PAR can be reduced by applying a time-domain compensation signal which reduces the magnitude of peaks in the time-domain signal prior to transmission where the time-domain compensation signals use tones that are reserved for the purpose of reducing the PAR. The reservation of these reserved tones for PAR can be implemented by altering the typical startup procedures in a digital subscriber line (xDSL) system. The use of the reserved tones to reduce the PAR can be implemented using a low complexity algorithm or using an adaptive technique.
摘要翻译：用于降低发射机峰值平均比（PAR）的系统和方法可以减少各种模拟组件所需的动态范围。可以通过应用时域补偿信号来减小PAR，该时域补偿信号在时域补偿信号使用为了减少PAR的目的而被保留的音调的同时减小时域信号中的峰值的幅度。可以通过改变数字用户线（xDSL）系统中的典型启动过程来实现用于PAR的这些保留音调的预留。可以使用低复杂度算法或使用自适应技术来实现使用保留的音调来减少PAR。

10. 发明申请

US20090216489A1 SYSTEMS AND METHODS FOR DERIVING PARAMETERS FOR IMPULSE NOISE DETECTORS 有权
标题翻译：用于输入脉冲噪声检测器的参数的系统和方法
公开(公告)号：US20090216489A1
公开(公告)日：2009-08-27
申请号：US12036035
申请日：2008-02-22
申请人： Amitkumar Mahadevan , Patrick Duvaut , Julien D. Pons
发明人： Amitkumar Mahadevan , Patrick Duvaut , Julien D. Pons
IPC分类号： G06F17/18 , H03M13/15
CPC分类号： H04L27/2647
摘要： Systems and methods for deriving parameters for frequency domain impulse noise detectors are described. At least one embodiment is a method for deriving a set of parameters associated with a frequency domain impulse noise detector. In accordance with such embodiments, the method comprises setting values for βpivot and βc, wherein βpivot and βc are values associated with a monotonic function of a ratio of a statistical parameter of disruptive noise to a statistical parameter of nominal noise. The method further comprises selecting a fixed ratio (m/M), wherein M is a number of monitored tones, and wherein m is a number of slicer error samples that must exceed a decision threshold for a symbol to be flagged as corrupted. The method also comprises selecting a plurality of values for M and computing a corresponding value of m based on the fixed ratio (m/M), calculating α based on the values of M, m, and βpivot, wherein α is a tunable scaling factor, and calculating a probability of a miss and a probability of a false alarm based on the values of M, m, βc, and α for each of the plurality of values of M. In accordance with some embodiments, the method further comprises selecting from among the plurality of values for M such that the larger of the probability of a miss and the probability of a false alarm is a predetermined scale factor less than a predetermined bit error rate (BER) at a selected value of βc in order to achieve the predetermined BER.
摘要翻译：描述了用于导出频域脉冲噪声检测器参数的系统和方法。至少一个实施例是用于导出与频域脉冲噪声检测器相关联的一组参数的方法。根据这样的实施方案，该方法包括设定betapivot和betac的值，其中betapivot和betac是与破坏性噪声的统计参数与标称噪声的统计参数的比率的单调函数相关联的值。所述方法还包括选择固定比率（m / M），其中M是所监视音调的数量，并且其中m是必须超过要标记为损坏的符号的判定阈值的限幅器误差样本的数量。该方法还包括选择M的多个值并基于固定比率（m / M）计算m的对应值，基于M，m和betapivot的值计算α，其中α是可调整缩放因子，并且基于M的多个值中的每一个的M，m，betac和α的值来计算遗漏的概率和误报率的概率。根据一些实施例，该方法还包括从在M的多个值中，使得错误的概率和假警报的概率中的较大者是小于所选择的betac值的预定比特误码率（BER）的预定比例因子，以便实现预定的BER。

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