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11. 发明授权

US08102946B2 Systems and methods for performing SISO detection in a WiMAX environment 有权
标题翻译：用于在WiMAX环境中执行SISO检测的系统和方法
公开(公告)号：US08102946B2
公开(公告)日：2012-01-24
申请号：US12168480
申请日：2008-07-07
申请人： Julien D. Pons , Patrick Duvaut
发明人： Julien D. Pons , Patrick Duvaut
IPC分类号： H03K9/00
CPC分类号： H04L25/067 , H04L25/03305
摘要： In accordance with some embodiments, a communication system is described that comprises a soft-output detector configured to receive a transmit signal and output reliability information regarding the received signal. In accordance with such embodiments, the detector comprises a symbol combiner configured to operate in both a repetition mode and a non-repetition mode, wherein repetition mode comprises receiving a plurality of signals for the transmit signal.
摘要翻译：根据一些实施例，描述了一种通信系统，其包括被配置为接收发射信号并输出关于接收信号的可靠性信息的软输出检测器。根据这样的实施例，检测器包括被配置为在重复模式和非重复模式中操作的符号组合器，其中重复模式包括接收用于发射信号的多个信号。

12. 发明申请

US20100002808A1 SYSTEMS AND METHODS FOR PERFORMING SISO DETECTION IN A WiMAX ENVIRONMENT 有权
标题翻译：用于在WiMAX环境中执行SISO检测的系统和方法
公开(公告)号：US20100002808A1
公开(公告)日：2010-01-07
申请号：US12168480
申请日：2008-07-07
申请人： Julien D. Pons , Patrick Duvaut
发明人： Julien D. Pons , Patrick Duvaut
IPC分类号： H04L27/06 , H04B1/10
CPC分类号： H04L25/067 , H04L25/03305
摘要： In accordance with some embodiments, a communication system is described that comprises a soft-output detector configured to receive a transmit signal and output reliability information regarding the received signal. In accordance with such embodiments, the detector comprises a symbol combiner configured to operate in both a repetition mode and a non-repetition mode, wherein repetition mode comprises receiving a plurality of signals for the transmit signal.
摘要翻译：根据一些实施例，描述了一种通信系统，其包括被配置为接收发射信号并输出关于接收信号的可靠性信息的软输出检测器。根据这样的实施例，检测器包括被配置为在重复模式和非重复模式中操作的符号组合器，其中重复模式包括接收用于发射信号的多个信号。

13. 发明授权

US08300771B2 Systems and methods for characterizing loop termination via single-ended line testing 有权
标题翻译：通过单端线路测试来表征环路终端的系统和方法
公开(公告)号：US08300771B2
公开(公告)日：2012-10-30
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 , H04M3/08 , H04M3/22
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。

14. 发明授权

US08126038B2 System and method for selectable mask for LDSL 失效
标题翻译： LDSL可选掩码的系统和方法
公开(公告)号：US08126038B2
公开(公告)日：2012-02-28
申请号：US12392039
申请日：2009-02-24
申请人： Patrick Duvaut , Ehud Langberg
发明人： Patrick Duvaut , Ehud Langberg
IPC分类号： H04B1/38
CPC分类号： H04Q11/04 , H04Q2213/13039 , H04Q2213/13094 , H04Q2213/13204 , H04Q2213/13396
摘要： The present invention overcomes various problems by defining two upstream masks (U1, U2) and two downstream masks (D1, D2) and using a mask selectable system for the long reach digital subscriber line (LDSL), in which a unique modem feature is activated during handshake to automatically check for physical layer status in terms of spectral compatibility and, thus, automatically optimize the boosted mode with the use of the mask selectable system choose the best combination of upstream/downstream masks in any physical layer noise scenario.
摘要翻译：本发明通过定义两个上游掩码（U1，U2）和两个下行掩码（D1，D2）并使用用于长距离数字用户线（LDSL）的掩码可选择系统来克服各种问题，其中唯一的调制解调器特征被激活在握手期间，根据频谱兼容性自动检查物理层状态，因此，使用掩码可选择系统自动优化升压模式，在任何物理层噪声场景中选择上游/下游掩码的最佳组合。

15. 发明申请

US20110200140A1 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：US20110200140A1
公开(公告)日：2011-08-18
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： H04L25/49
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。

16. 发明授权

US07974181B2 Systems and methods for transmit-only peak-to-average ratio reduction in the oversampled regime using reserved tones 有权
标题翻译：使用保留色调的过采样方案中仅发送峰到峰比降低的系统和方法
公开(公告)号：US07974181B2
公开(公告)日：2011-07-05
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： H04J11/00
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。

17. 发明授权

US07957477B2 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：US07957477B2
公开(公告)日：2011-06-07
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。

18. 发明申请

US20100278328A1 SYSTEMS AND METHODS FOR SELECTING TONES FOR FAR-END CROSS TALK MITIGATION 有权
标题翻译：用于选择用于末端十字路口减速的音调的系统和方法
公开(公告)号：US20100278328A1
公开(公告)日：2010-11-04
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： H04B3/32
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。

19. 发明申请

US20100061437A1 Systems and Methods for Impulse Noise Characterization 有权
标题翻译：脉冲噪声表征系统与方法
公开(公告)号：US20100061437A1
公开(公告)日：2010-03-11
申请号：US12348565
申请日：2009-01-05
申请人： Hemant Samdani , Kunal Raheja , Rahul Garg , Amitkumar Mahadevan , Patrick Duvaut
发明人： Hemant Samdani , Kunal Raheja , Rahul Garg , Amitkumar Mahadevan , Patrick Duvaut
IPC分类号： H04B17/00
CPC分类号： H04B3/46
摘要： Impulse noise from nearby or intense electrical sources can disrupt communications over digital subscriber lines (DSL). The characterization of the nature, timing and length of impulse noise sources present on a DSL loop is a critical first step in mitigating the effect of impulse noise on DSL communications. DSL standards provide histograms for impulse length and inter-arrival time of impulses. These histograms can be used to derive the nature, maximum frequency and other statistics related to impulse noise on a DSL line.
摘要翻译：来自附近或强电场的脉冲噪声可能会扰乱通过数字用户线路（DSL）的通信。存在于DSL环路上的脉冲噪声源的性质，时间和长度的表征是减轻脉冲噪声对DSL通信的影响的关键的第一步。 DSL标准提供脉冲长度和脉冲到达间隔时间的直方图。这些直方图可用于导出与DSL线路上的脉冲噪声有关的性质，最大频率和其他统计。

20. 发明授权

US07660260B2 Downstream power back-off for fiber to node applications 失效
标题翻译：光纤到节点应用的下游功率回退
公开(公告)号：US07660260B2
公开(公告)日：2010-02-09
申请号：US11712125
申请日：2007-02-28
申请人： Patrick Duvaut , Amitkumar Mahadevan , Massimo Sorbara
发明人： Patrick Duvaut , Amitkumar Mahadevan , Massimo Sorbara
IPC分类号： H04J1/16 , H04B1/38
CPC分类号： H04M11/062
摘要： There is provided a method of shaping PSD (Power Spectrum Density) of an FTTN (Fiber-To-The-Node) downstream signal from a disturber source to achieve spectral compatibility at an FTTN downstream victim with a downstream PSD from a reference source. The method includes receiving the downstream PSD from the reference source. The method further includes receiving an unshaped downstream PSD from the disturber source. The method further includes shaping the PSD of the FTTN downstream signal to have a substantially equivalent FEXT (Far-End Cross-Talk) into the FTTN downstream victim as the downstream PSD from the reference source.
摘要翻译：提供了一种从干扰源获得FTTN（光纤到节点）下行信号的PSD（功率谱密度）的方法，以在具有来自参考源的下游PSD的FTTN下游受害者处获得频谱兼容性。该方法包括从参考源接收下游PSD。该方法还包括从干扰源接收未形成的下游PSD。该方法还包括对FTTN下行信号的PSD进行整形，以使作为来自参考源的下游PSD的FTTN下游受害者具有基本相等的FEXT（远端交叉对话）。

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