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公开(公告)号：EP2427973A4
公开(公告)日：2014-03-19
申请号：EP10772440
申请日：2010-04-12
CPC分类号： H03M13/251 , H03M13/09 , H03M13/1505 , H03M13/256 , H03M13/353 , H03M13/616 , H04L1/0057 , H04L1/0073 , H04L1/1607
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公开(公告)号：EP2356790A4
公开(公告)日：2014-02-19
申请号：EP09807115
申请日：2009-08-08
发明人： SANDS NICHOLAS P , FISHER KEVIN D
CPC分类号： H04B3/32 , H04B3/487 , H04M11/062 , Y02D50/44
摘要： A vectored DSL system reduces or eliminates correlated alien interference in active DSL lines in the vectored system by collecting pseudo signals from inactive lines that do not carry upstream DSL transmissions and/or from common-mode voltage signals from active lines. The collected pseudo signals contain in-domain interference, such as FEXT interference from the active DSL lines in the vectored system, and correlated alien interference. After removing the in-domain interference from the pseudo signals, the remaining alien interference data can be used to generate FEXT cancellation coefficients or the like that are used in DSL vectoring to remove the correlated alien interference from upstream DSL user signals from the active DSL lines. The generated FEXT cancellation coefficients are used in a manner analogous to in-domain FEXT data collected from the active lines during training, tracking, etc. The vectored DSL system can include modems coupled to a private vectoring data routing apparatus to one or more vectoring modules The vectoring modules can employ vector processors that include processing units configured to process collected user data on the basis of all modems' data for a given DSL tone grouping, thus removing FEXT effects from the user data and returning vectored user data to the modems using the routing apparatus, which can be a specialized data transmission network utilizing one or more vector routers.
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3.发明公开SYSTEMS AND METHODS FOR MITIGATING THE EFFECTS OF UPSTREAM FAR-END CROSS TALK 审中-公开系统和方法减小信号UP远端谈论的影响
公开(公告)号：EP2220772A1
公开(公告)日：2010-08-25
申请号：EP08849224.4
申请日：2008-10-20
发明人： DUVAUT, Patrick , MAHADEVAN, Amitkumar , BIYANI, Pravesh , SINGH, Shailendra , MAHESHWARI, Satyavardhan
IPC分类号： H04B1/00
CPC分类号： H04L25/03159 , H04B3/32 , H04L27/2601 , H04L2025/03426 , H04L2025/03522
摘要： Systems and methods for mitigating the effects of self-FEXT within an xDSL system are described. At least one embodiment is a method for reducing self-induced far end crosstalk (self-FEXT) in a multiple input multiple output (MIMO) digital subscriber line (xDSL) system. The method comprises deriving an initial value for an off-diagonal multiple input multiple output canceller (ODMC) while the ODMC is inactive and while in data mode. The method further comprises activating the initial ODMC and converging towards an steady-state value for the ODMC by performing an adaptive algorithm to maximize the Shannon's capacity of the system and to reduce upstream self- FEXT. The method also comprises performing bit loading and updating a frequency domain equalizer (FEQ).
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4.发明公开ADAPTIVE INTEGRATED HYBRID WITH COMPLEX ADAPTATION FOR DIGITAL SUBSCRIBER LINE SYSTEMS 有权带有复杂适应数字用户线系统的自适应集成式混合
公开(公告)号：EP2467948A4
公开(公告)日：2015-03-25
申请号：EP10810459
申请日：2010-08-17
发明人： MURALT ARNOLD , SACKINGER EDUARD , ZHENG FENGHUA , LARSEN FRED
IPC分类号： H04B3/03
CPC分类号： H04B3/03
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公开(公告)号：EP2055014B1
公开(公告)日：2013-03-06
申请号：EP07814423.5
申请日：2007-08-24
CPC分类号： H04B3/32 , H04L1/0042
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公开(公告)号：EP1702417A4
公开(公告)日：2012-09-05
申请号：EP05705243
申请日：2005-01-10
发明人： DUVAUT PATRICK , OUYANG FENG
CPC分类号： H04L5/0044 , H04L5/0007 , H04L5/006 , H04L5/14 , H04W52/34
摘要： A technique for real-time formation of optimal power spectral density masks is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for real-time formation of optimal power spectral density masks. The method may comprise sensing line conditions in a communication medium, wherein the communication medium is capable of carrying signals in a plurality of tones. The method may also comprise determining, in real-time, one or more power spectral density masks that substantially optimize transmissions of the signals in the plurality of tones. The method may further comprise transmitting the signals in the plurality of tones based on the one or more power spectral masks.
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8.发明公开METHOD AND SYSTEM FOR VIRTUAL EXCHANGE REFERENCE IMPACT (VERI) FOR USE IN MIXED SPECTRUM MANAGEMENT IN DSL 有权FOR USE IN混合光谱管理DSL方法和系统VERI（虚拟参考Exchange IMPACT）
公开(公告)号：EP1829269A4
公开(公告)日：2011-12-07
申请号：EP05853800
申请日：2005-12-13
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公开(公告)号：EP2341635A2
公开(公告)日：2011-07-06
申请号：EP10195676.1
申请日：2010-12-17
发明人： Biyani, Pravesh , Alloin, Laurent Francis , Prakriya, Shankar c/o Indian Institute of Technology , Prassad, Surendra c/o Indian Institute of Technology
IPC分类号： H04B3/32
摘要： A method implemented in a multi-user communication system is described for performing far-end crosstalk (FEXT) cancellation for each victim user. The method comprises performing dynamic programming to allocate resources according to (N-1) normalized disturber coupling values and difference rate function values associated with N total users in the system involved in partial FEXT cancellation. In accordance with some embodiments, dynamic programming comprises selecting a tone and one or more disturbers to be cancelled for the tone.
摘要翻译： 在多用户通信系统中实现的方法被描述为每个牺牲用户执行的远端串扰（FEXT）消除。 该方法包括：执行动态规划以分配资源到gemäß（N-1）归一化的干扰耦合与在局部FEXT消除所涉及的系统总共N的用户相关联的值和差速率函数的值。 在一些实施方案雅舞蹈，动态规划包括选择一个音调和一个或多个干扰源被取消为基调。
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公开(公告)号：EP2321907A1
公开(公告)日：2011-05-18
申请号：EP09812148.6
申请日：2009-09-02
IPC分类号： H04B3/46
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.
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