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31. 发明申请

US20090310659A1 Adaptive Turbo Peak Mitigation for Peak-to-Average Ratio (PAR) Reduction Using Reserved Tones 有权
标题翻译：使用保留音调的峰值平均比（PAR）减小的自适应Turbo峰值缓解
公开(公告)号：US20090310659A1
公开(公告)日：2009-12-17
申请号：US12139146
申请日：2008-06-13
申请人： Rahul Garg , Patrick Duvaut , Harish Jethanandani , Amitkumar Mahadevan
发明人： Rahul Garg , Patrick Duvaut , Harish Jethanandani , Amitkumar Mahadevan
IPC分类号： H04B1/38
CPC分类号： H04M11/062
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。

32. 发明申请

US20080310296A1 Systems and Methods for Transmit-Only Peak-to-Average Ratio Reduction in the Oversampled Regime Using Reserved Tones 有权
标题翻译：使用保留音调的过采样方案中仅发送峰均比减少的系统和方法
公开(公告)号：US20080310296A1
公开(公告)日：2008-12-18
申请号：US12138731
申请日：2008-06-13
申请人： Amitkumar Mahadevan , Patrick Duvaut , Harish Jethanandani , Rahul Garg
发明人： Amitkumar Mahadevan , Patrick Duvaut , Harish Jethanandani , Rahul Garg
IPC分类号： H04L29/04 , H04B3/00 , H04B15/00
CPC分类号： H04L27/2618
摘要： Systems and methods for reducing the peak-to-average power 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 in the oversampled regime, using tones reserved for PAR reduction. A set of vectors corresponding to PAR tones is generated by processing out-of-phase symbols for each PAR tone to form a span matrix. The span matrix is used to find a best fit of a desired target signal to a time-domain compensation signal comprising only PAR tones.
摘要翻译：用于降低发射机的峰均功率比（PAR）的系统和方法可以减少各种模拟组件所需的动态范围。可以通过在过采样方案中应用时域补偿信号，使用保留给PAR减少的音调来减少PAR。通过处理每个PAR色调的异相符号来生成对应于PAR色调的一组矢量以形成跨度矩阵。跨度矩阵用于找到期望目标信号对仅包括PAR色调的时域补偿信号的最佳拟合。

33. 发明申请

US20080049855A1 Systems and Methods for MIMO Precoding in an xDSL System 有权
标题翻译： xDSL系统中MIMO预编码的系统和方法
公开(公告)号：US20080049855A1
公开(公告)日：2008-02-28
申请号：US11845040
申请日：2007-08-25
申请人： Patrick Duvaut , Amitkumar Mahadevan , Massimo Sorbara , Ehud Langberg
发明人： Patrick Duvaut , Amitkumar Mahadevan , Massimo Sorbara , Ehud Langberg
IPC分类号： H04L27/28
CPC分类号： H04B3/32 , H04L1/0042
摘要： Systems and methods for off-diagonal MIMO precoders are described. At least one embodiment includes a method for precoding data for transmission in a discrete multi-tone (DMT) xDSL system to cancel self-induced far end crosstalk (self-FEXT) comprising: learning characteristics associated with a plurality of N users within the xDSL system to determine an initial off-diagonal multiple input multiple output (MIMO) precoder (ODMP) for a given tone frequency; and converging towards an optimum ODMP from the initial ODMP in order to cancel downstream self-FEXT for the plurality of N users, wherein the ODMP is represented as a zero diagonal matrix with only off-diagonal terms, and wherein the converging towards the optimum ODMP comprises: maximizing the channel capacity for the plurality of N users for the given tone frequency; and minimizing an increase in transmit power of the xDSL system relative to an original transmit power where a precoder is not active.
摘要翻译：描述了非对角MIMO预编码器的系统和方法。至少一个实施例包括用于预编码用于在离散多音（DMT）xDSL系统中传输的数据以消除自感应远端串扰（self-FEXT）的方法，包括：与xDSL内的多个N个用户相关联的学习特征系统确定用于给定音频的初始非对角多输入多输出（MIMO）预编码器（ODMP）; 并从最初的ODMP收敛到最佳的ODMP，以消除多个N个用户的下游自身FEXT，其中ODMP被表示为只有非对角项的零对角矩阵，并且其中朝向最佳ODMP 包括：使给定音调频率的多个N个用户的信道容量最大化; 并且最小化xDSL系统相对于预编码器不活动的原始发射功率的发射功率的增加。

34. 发明申请

US20070157065A1 Self-Protection Against Non-Stationary Disturbances 有权
标题翻译：对非固定干扰的自我保护
公开(公告)号：US20070157065A1
公开(公告)日：2007-07-05
申请号：US11615535
申请日：2006-12-22
申请人： Julien Pons , Amitkumar Mahadevan , Patrick Duvaut
发明人： Julien Pons , Amitkumar Mahadevan , Patrick Duvaut
IPC分类号： H03M13/00 , G06F11/00
CPC分类号： H03M13/2732 , H03M13/1102 , H03M13/2957 , H03M13/31 , H03M13/6362 , H04L1/0066 , H04L1/0068 , H04L1/0071 , H04L27/2601
摘要： Included are embodiments for self protection. At least one embodiment includes Self-protection Unit for protecting a signal that includes a first receiving component configured to receive data, the received data being received as at least one frame and a subframing component configured to subframe at least a portion of the received data, wherein subframing includes converting the at least one into a plurality of subframes. Some embodiments include a subframe interleaver component configured to interleave at least a portion of the subframes.
摘要翻译：包括自我保护的实施例。至少一个实施例包括用于保护包括被配置为接收数据的第一接收组件的信号的自保护单元，被接收为至少一个帧的接收数据和被配置为子帧接收到的数据的至少一部分的子帧组件，其中子帧包括将所述至少一个转换成多个子帧。一些实施例包括被配置为交织子帧的至少一部分的子帧交织器组件。

35. 发明授权

US08515016B2 Systems and methods for bridge tap detection based on per-port calibration 有权
标题翻译：基于每端口校准的桥式抽头检测系统和方法
公开(公告)号：US08515016B2
公开(公告)日：2013-08-20
申请号：US12044489
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 bridge tap detection are described. One embodiment is a method which comprises receiving an echo signal for a loop under test where the echo signal is a per-port calibrated echo response obtained using frequency domain reflectometry single-ended line testing (FDR-SELT). The method further comprises analyzing the echo signal to determine whether differentiating features are present in the per-port calibrated echo signal in order to determine whether the loop under test is a bridge tapped loop.
摘要翻译：描述了用于执行桥接抽头检测的系统和方法。一个实施例是一种方法，其包括接收用于测试环路的回波信号，其中回波信号是使用频域反射测量单端线测试（FDR-SELT）获得的每端口校准的回波响应。该方法还包括分析回波信号以确定在每端口校准的回波信号中是否存在微分特征，以便确定被测环路是否是桥接抽头循环。

36. 发明授权

US08457219B2 Self-protection against non-stationary disturbances 有权
标题翻译：对非稳定干扰的自我保护
公开(公告)号：US08457219B2
公开(公告)日：2013-06-04
申请号：US11615535
申请日：2006-12-22
申请人： Julien Pons , Amitkumar Mahadevan , Patrick Duvaut
发明人： Julien Pons , Amitkumar Mahadevan , Patrick Duvaut
IPC分类号： H04K1/10
CPC分类号： H03M13/2732 , H03M13/1102 , H03M13/2957 , H03M13/31 , H03M13/6362 , H04L1/0066 , H04L1/0068 , H04L1/0071 , H04L27/2601
摘要： Included are embodiments for self protection. At least one embodiment includes Self-protection Unit for protecting a signal that includes a first receiving component configured to receive data, the received data being received as at least one frame and a subframing component configured to subframe at least a portion of the received data, wherein subframing includes converting the at least one into a plurality of subframes. Some embodiments include a subframe interleaver component configured to interleave at least a portion of the subframes.
摘要翻译：包括自我保护的实施例。至少一个实施例包括用于保护包括被配置为接收数据的第一接收组件的信号的自保护单元，被接收为至少一个帧的接收数据和被配置为子帧接收到的数据的至少一部分的子帧组件，其中子帧包括将所述至少一个转换成多个子帧。一些实施例包括被配置为交织子帧的至少一部分的子帧交织器组件。

37. 发明授权

US08194767B2 Systems and methods for MIMO precoding in an xDSL system 有权
标题翻译：用于xDSL系统中MIMO预编码的系统和方法
公开(公告)号：US08194767B2
公开(公告)日：2012-06-05
申请号：US13091651
申请日：2011-04-21
申请人： Patrick Duvaut , Amitkumar Mahadevan , Massimo Sorbara , Ehud Langberg
发明人： Patrick Duvaut , Amitkumar Mahadevan , Massimo Sorbara , Ehud Langberg
IPC分类号： H04L27/28
CPC分类号： H04B3/32 , H04L1/0042
摘要： One embodiment is a method for precoding data for transmission in a discrete multi-tone (DMT) system to cancel self-induced far end crosstalk (self-FEXT). The method comprises learning, by the system, characteristics associated with a plurality of N users within a digital subscriber line (xDSL) system to determine an initial off-diagonal multiple input multiple output (MIMO) precoder (ODMP) for a given tone frequency and converging towards an ODMP from the initial ODMP to cancel self-FEXT for the plurality of N users, wherein the ODMP is represented as a zero diagonal matrix containing only off-diagonal terms.
摘要翻译：一个实施例是用于在离散多音（DMT）系统中预编码用于传输的数据以消除自感应远端串扰（self-FEXT）的方法。该方法包括通过系统学习与数字用户线（xDSL）系统内的多个N个用户相关联的特征，以确定给定音频的初始非对角多输入多输出（MIMO）预编码器（ODMP），以及从初始ODMP收敛到ODMP以取消多个N个用户的自身FEXT，其中ODMP被表示为仅包含非对角项的零对角矩阵。

38. 发明授权

US07978756B2 Systems and methods for monitoring impulse noise 有权
标题翻译：用于监测脉冲噪声的系统和方法
公开(公告)号：US07978756B2
公开(公告)日：2011-07-12
申请号：US12098696
申请日：2008-04-07
申请人： Hemant Samdani , Kunal Raheja , Rahul Garg , Patrick Duvaut , Amitkumar Mahadevan , Robert A. Day , Robin Levonas
发明人： Hemant Samdani , Kunal Raheja , Rahul Garg , Patrick Duvaut , Amitkumar Mahadevan , Robert A. Day , Robin Levonas
IPC分类号： H04B3/46 , H04B17/00 , H04Q1/20
CPC分类号： H04L27/2647 , H04B3/487
摘要： Systems and methods for monitoring impulse noise are described. At least one embodiment is a method, which comprises detecting whether impulse noise is present and in response to detecting the presence of impulse noise, performing time domain analysis to determine whether one or more impulse noise sources are present based on minimum interarrival time and maximum impulse length. The method further includes performing frequency domain analysis to estimate frequencies associated with the one or more impulse noise sources and based on the time domain analysis and frequency domain analysis, providing a total number of impulse noise sources and frequencies associated with the impulse noise sources. In this regard, the embodiments described herein provide dual-speed monitoring of impulse noise in the form of short-term and long-term monitoring. The use of dual-speed monitoring ensures that dynamic changes in the impulse noise environment are quickly addressed and also ensures better characterization of multiple impulse noise sources in order to provide better impulse noise protection.
摘要翻译：描述了用于监视脉冲噪声的系统和方法。至少一个实施例是一种方法，其包括检测是否存在脉冲噪声并且响应于检测到脉冲噪声的存在，执行时域分析以基于最小间隔时间和最大脉冲来确定是否存在一个或多个脉冲噪声源长度。该方法还包括执行频域分析以估计与一个或多个脉冲噪声源相关联的频率，并且基于时域分析和频域分析，提供脉冲噪声源和与脉冲噪声源相关联的频率的总数。在这方面，本文描述的实施例以短期和长期监视的形式提供脉冲噪声的双速度监测。使用双速度监测可确保脉冲噪声环境中的动态变化得到快速解决，并确保更好地表征多个脉冲噪声源，以提供更好的脉冲噪声保护。

39. 发明申请

US20090310658A1 Systems and Methods for Positioning and Messaging of Reserved Tones for Peak-to-Average Ratio (PAR) Reduction in DSL Systems 有权
标题翻译： DSL系统中峰值平均比（PAR）降低的保留音的定位和消息传递系统和方法
公开(公告)号：US20090310658A1
公开(公告)日：2009-12-17
申请号：US12138657
申请日：2008-06-13
申请人： Rahul Garg , Patrick Duvaut , Amitkumar Mahadevan , Harish Jethanandani
发明人： Rahul Garg , Patrick Duvaut , Amitkumar Mahadevan , Harish Jethanandani
IPC分类号： H04B1/38
CPC分类号： H04M11/062
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。

40. 发明申请

US20090245340A1 Systems and Methods for Signaling for Vectoring of DSL Systems 有权
标题翻译： DSL系统矢量信号的系统和方法
公开(公告)号：US20090245340A1
公开(公告)日：2009-10-01
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： H04B17/00
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。可以专门用于保护客户端设备（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。

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