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51. 发明授权

US08204211B2 Systems and methods for selecting tones for far-end cross talk mitigation 有权
标题翻译：用于选择音调以进行远端串扰减轻的系统和方法
公开(公告)号：US08204211B2
公开(公告)日：2012-06-19
申请号：US12431878
申请日：2009-04-29
申请人： Amitkumar Mahadevan , Patrick Duvaut , Laurent Francis Alloin
发明人： Amitkumar Mahadevan , Patrick Duvaut , Laurent Francis Alloin
IPC分类号： H04M1/00 , H04M9/00 , H04M1/76
CPC分类号： H04B3/32
摘要： Systems and methods are described for selecting tones for far-end crosstalk (FEXT) mitigation. In particular, systems and methods are described for performing far-end crosstalk (FEXT) mitigation within a digital subscriber line (xDSL) system. One embodiment is a method that comprises determining a first set of function values relating to a per-tone signal-to-noise ratio (SNR) for a user among a plurality of users for a number of tones, wherein the number of tones is less than or equal to a total number of tones available for transmission. The method further comprises estimating coefficients for performing FEXT mitigation for the number of tones, performing FEXT mitigation on the number of tones based on the estimated coefficients, and performing FEXT mitigation on a selected group of tones from among the number of tones, wherein the selected group of tones is less than or equal to the number tones.
摘要翻译：描述了用于选择用于远端串扰（FEXT）减轻的音调的系统和方法。特别地，描述了用于在数字用户线（xDSL）系统内执行远端串扰（FEXT）减轻的系统和方法。一个实施例是一种方法，其包括确定与多个用户之间的用户对于多个音调的用户的每音调信噪比（SNR）有关的第一功能值集合，其中，音调数量较少超过或等于可用于传输的总音数。该方法还包括估计用于对音调数执行FEXT减轻的系数，基于估计的系数对音调数执行FEXT减轻，以及从所选择的音数中对所选择的音调组执行FEXT减轻，其中所选择的一组音调小于或等于数字音。

52. 发明申请

US20110167325A1 Back Channel Communication 有权
标题翻译：后通道通讯
公开(公告)号：US20110167325A1
公开(公告)日：2011-07-07
申请号：US13046991
申请日：2011-03-14
申请人： Massimo Sorbara , Patrick Duvaut , Yan Wu
发明人： Massimo Sorbara , Patrick Duvaut , Yan Wu
IPC分类号： G06F11/07
CPC分类号： H04L12/66 , H04B3/32
摘要： Various embodiments are described for back channel communication. One embodiment is a method that comprises receiving data at customer premises equipment (CPE), determining at least one error in the received data, formatting the determined error for communication to a central office (CO), and sending the formatted error to the CO via a back channel, wherein the formatted error is sent between sync frames of a discrete multitone (DMT) superframe.
摘要翻译：对于后向信道通信描述了各种实施例。一个实施例是一种方法，其包括在客户驻地设备（CPE）处接收数据，确定接收到的数据中的至少一个错误，将确定的错误格式化为中心局（CO），并将格式化的错误发送到CO经由背信道，其中格式化的错误在离散多音（DMT）超帧的同步帧之间发送。

53. 发明授权

US07953143B2 Systems and methods for deriving parameters for impulse noise detectors 有权
标题翻译：用于推导脉冲噪声检测器参数的系统和方法
公开(公告)号：US07953143B2
公开(公告)日：2011-05-31
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： H04B1/38 , H04K1/10
CPC分类号： H04L27/2647
摘要： A system is described that comprises a frequency domain impulse noise detector configured to monitor received discrete multi-tone (DMT) symbols for impulse noise, a Reed Solomon (RS) decoder with erasure and erasure correction capability for performing error correction on received DMT symbols, and an optimization module configured to adjust parameters associated with the impulse noise detector, the optimization module configured to adjust values for βpivot, βc, and a ratio (m/M), wherein M is a number of monitored tones, m is a number of slicer error samples that must exceed a decision threshold for a symbol to be flagged as corrupted, and 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.
摘要翻译：描述了一种系统，其包括被配置为监视用于脉冲噪声的接收的离散多音（DMT）符号的频域脉冲噪声检测器，具有用于对所接收的DMT符号执行纠错的擦除和擦除校正能力的里德所罗门（RS）解码器，以及优化模块，被配置为调整与所述脉冲噪声检测器相关联的参数，所述优化模块被配置为调整所述第一和第二位置的比值（m / M），其中M是监视音调的数量，m 是多个限幅器错误样本，必须超过要标记为损坏的符号的判定阈值，并且＆bgr; pivot和＆bgr; c是与破坏性噪声的统计参数与统计学的比率的单调函数相关联的值标称噪声参数

54. 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。

55. 发明申请

US20090257581A1 Cooperative MIMO for Alien Noise Cancellation (COMAC) for Upstream VDSL Systems 有权
标题翻译：用于上行VDSL系统的外部噪声消除（COMAC）的合作MIMO
公开(公告)号：US20090257581A1
公开(公告)日：2009-10-15
申请号：US12100253
申请日：2008-04-09
申请人： Pravesh Biyani , Amitkumar Mahadevan , Patrick Duvaut
发明人： Pravesh Biyani , Amitkumar Mahadevan , Patrick Duvaut
IPC分类号： H04M1/74
CPC分类号： H04L27/2647 , H04B3/32
摘要： Included are embodiments for reducing alien crosstalk. At least one embodiment of a method includes receiving noise data associated with a first user signal on a first tone, receiving noise data associated with a second user signal on the first tone, and receiving at least one alien crosstalk canceller coefficient for the first user on the first tone. Some embodiments include applying the at least one alien crosstalk canceller coefficient to the second user signal to reduce alien crosstalk for the first user signal.
摘要翻译：包括减少外来串扰的实施例。方法的至少一个实施例包括接收与第一音调上的第一用户信号相关联的噪声数据，接收与第一音调上的第二用户信号相关联的噪声数据，以及为第一用户接收至少一个外来串扰消除器系数第一音一些实施例包括将至少一个外来串扰消除器系数应用于第二用户信号以减少第一用户信号的外来串扰。

56. 发明授权

US07580379B2 Technique for dynamic bin allocation 有权
标题翻译：动态分配箱的技术
公开(公告)号：US07580379B2
公开(公告)日：2009-08-25
申请号：US10824611
申请日：2004-04-15
申请人： Feng Ouyang , Patrick Duvaut , Chengshu Wang
发明人： Feng Ouyang , Patrick Duvaut , Chengshu Wang
IPC分类号： H04J1/00
CPC分类号： H04L27/2608
摘要： A technique for dynamic bin allocation is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for dynamic bin allocation. The method may comprise obtaining link performance data based on a plurality of test transmissions between two network elements, wherein the plurality of test transmissions utilize at least one transmission mode in each of a plurality of frequency ranges. The method may also comprise determining a desired transmission scheme, wherein each of the plurality of frequency ranges is designated for at least one of the at least one transmission mode based at least in part on the link performance data. The desired transmission scheme may be determined by identifying a desired transmission mode for each of the plurality of frequency ranges, or the desired transmission scheme may be selected from a plurality of predetermined transmission schemes.
摘要翻译：公开了一种用于动态分配箱的技术。在一个特定的示例性实施例中，该技术可以被实现为用于动态仓分配的方法。该方法可以包括基于两个网络元件之间的多个测试传输来获得链路性能数据，其中多个测试传输在多个频率范围的每一个中使用至少一个传输模式。该方法还可以包括确定期望的传输方案，其中至少部分地基于链路性能数据来指定多个频率范围中的每一个针对至少一个传输模式中的至少一个。可以通过识别多个频率范围中的每一个的期望的传输模式来确定期望的传输方案，或者可以从多个预定传输方案中选择所需的传输方案。

57. 发明申请

US20090177938A1 Cognitive and Universal Impulse Noise Protection 有权
标题翻译：认知和通用脉冲噪声保护
公开(公告)号：US20090177938A1
公开(公告)日：2009-07-09
申请号：US12348763
申请日：2009-01-05
申请人： Julien D. Pons , Patrick Duvaut , Massimo Sorbara , Yue-Peng Zheng
发明人： Julien D. Pons , Patrick Duvaut , Massimo Sorbara , Yue-Peng Zheng
IPC分类号： H04L1/18
CPC分类号： H04L1/1867 , H04L1/0009 , H04L1/0019 , H04L1/0057 , H04L1/0071 , H04L1/1812 , H04L1/20 , H04L27/2601
摘要： Impulse noise from nearby or intense electrical sources can disrupt communications over digital subscriber lines. There are many methods to deal with errors produced by impulse noise sources. Forward error correction (FEC) codes such as Reed Solomon coding along with scrambling and interleaving are used to correct small errors. However, for larger errors, retransmission is favored. Retransmission can be applied at the Discrete Multi-tone symbol level thus eliminating the need to insert sequence identification into data transmission units, furthermore retransmission can also be employed to exploit the error correcting capabilities of the FEC codes. Finally, an impulse noise protection system can exploit impulse noise statistics to configure the redundancy in the FEC codes and to enable the use of blanking. Exemplary embodiments of systems described can cooperatively use impulse noise statistics to utilize retransmission, FEC and blanking to mitigate the effects of impulse noise.
摘要翻译：来自附近或强电场的脉冲噪声可能会扰乱数字用户线路的通信。有很多方法来处理由脉冲噪声源产生的误差。使用诸如Reed Solomon编码的前向纠错（FEC）码以及加扰和交织来校正小错误。然而，对于较大的错误，重传是有利的。可以在离散多音符号级别应用重传，从而不需要将序列识别插入到数据传输单元中，此外还可以使用重传来利用FEC码的纠错能力。最后，脉冲噪声保护系统可以利用脉冲噪声统计来配置FEC码中的冗余，并且能够使用消隐。所描述的系统的示例性实施例可以协同地使用脉冲噪声统计来利用重传，FEC和消隐来减轻脉冲噪声的影响。

58. 发明授权

US07555052B2 Method and system for a turbo trellis coded modulation scheme for communication systems 有权
标题翻译：用于通信系统的turbo网格编码调制方案的方法和系统
公开(公告)号：US07555052B2
公开(公告)日：2009-06-30
申请号：US11248224
申请日：2005-10-13
申请人： Julien Pons , Patrick Duvaut
发明人： Julien Pons , Patrick Duvaut
IPC分类号： H04L5/12
CPC分类号： H04L27/3433 , H03M13/256 , H03M13/258 , H04L1/0041 , H04L1/005 , H04L1/006 , H04L1/0066 , H04L27/18 , H04L27/2601 , H04L27/2602 , H04L27/3405 , H04L27/3416 , H04M11/062
摘要： Method and System for evaluating a turbo-coding scheme suitable for VDSL2 systems. The scheme is a Turbo-Trellis Coded Modulation TTCM that makes use of a Parallel Concatenated Convolutional Code (PCCC) including an inner Latin square/rectangular matrix of Random sequence pattern Interleaver (LRI) of approximately 2044 bits. In the presence of the outer Reed Solomon Code but without an outer interleaver (fast mode), the method and system provides 7.1 dB of average net coding gain, i.e., 2.6 dB of coding gain improvement relative to the standard 16 states 4-dimensional (4-D) trellis code used in current ADSL2 systems. The substantial coding gain achieved through the method and system, leads to an increase in the VDSL2 rate by 38% at 6 kft against local exchange carriers, such as ILEC (SBC) conditions with approximately 1.5 ms of latency. By encoding only two bits per tone (i.e., 1 bit per dimension), the turbo code implementation complexity is kept reasonable. Finally, the coded modulation scheme supports very small constellations, allowing transmitting spectral efficiency as low as 0.5 bit/sec/Hz over Binary Phase Shift Keying (BPSK) constellations at a signal-to-noise-ration (SNR) very close to the Shannon bound.
摘要翻译：用于评估适用于VDSL2系统的turbo编码方案的方法和系统。该方案是Turbo-Trellis编码调制TTCM，它利用包含大约2044位的随机序列模式交织器（LRI）的内拉丁方块/矩形矩阵的并行级联卷积码（PCCC）。在外部里德所罗门码的存在下，没有外部交织器（快速模式），该方法和系统提供7.1dB的平均净编码增益，即相对于标准16状态4维的2.6dB的编码增益改善（ 4-D）当前ADSL2系统中使用的格状码。通过该方法和系统实现的实质编码增益导致6kft处的VDSL2速率相对于本地交换载波（例如具有大约1.5ms延迟的ILEC（SBC））条件增加38％。通过仅对每个音调编码两个比特（即，每个维度1比特），turbo码实现复杂度保持合理。最后，编码调制方案支持非常小的星座，允许在非常接近香农的信噪比（SNR）的二进制相移键控（BPSK）星座上传输低至0.5比特/秒/ Hz的频谱效率界。

59. 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。

60. 发明授权

US07457368B2 Multilevel channel coding in ADSL 有权
标题翻译： ADSL中的多级信道编码
公开(公告)号：US07457368B2
公开(公告)日：2008-11-25
申请号：US10860286
申请日：2004-06-04
申请人： Patrick Duvaut , Ehud Langberg , Julien Pons , William Scholtz
发明人： Patrick Duvaut , Ehud Langberg , Julien Pons , William Scholtz
IPC分类号： H04L5/12
CPC分类号： H04L1/006 , H03M13/255 , H03M13/256 , H03M13/635 , H04L1/0041 , H04L1/0066 , H04L1/007
摘要： Disclosed herein are various techniques for multilevel channel coding. For a given binary word comprising a plurality of bits, the least-significant bit may be encoded by a boosted coding technique, such as turbo channel coding or low density parity check (LDPC) channel coding. A subset of the remaining bits of the binary word may be encoded using trellis coded modulation (TCM) coding. The results of the boosted channel coding and the TCM coding may be mapped to one or more symbols. The one or more symbols then may be transmitted to a receiver using transmission techniques well known to those skilled in the art. The present invention finds particular benefit in digital subscriber line (DSL)-based systems in accord with the ITU G.922.1 Recommendation and similar standards.
摘要翻译：这里公开了用于多电平信道编码的各种技术。对于包括多个位的给定二进制字，最低有效位可以通过诸如turbo信道编码或低密度奇偶校验（LDPC）信道编码的增强编码技术来编码。可以使用网格编码调制（TCM）编码对二进制字的剩余位的子集进行编码。增强的信道编码和TCM编码的结果可以映射到一个或多个符号。然后可以使用本领域技术人员公知的传输技术将一个或多个符号发送到接收机。本发明在符合ITU G.922.1建议书和类似标准的基于数字用户线路（DSL）的系统中具有特别的益处。

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