公开(公告)号：US20040202241A1

公开(公告)日：2004-10-14

申请号：US10714867

申请日：2003-11-18

申请人： Globespan Virata Incorporated

发明人： Patrick Duvaut ,  Lujing Cai ,  Massimo Sorbara

IPC分类号： H04B001/38 ,  H04L005/16

CPC分类号： H04L12/2854

摘要： A nullSmart DSL Systemnull for addressing the performance objectives of LDSL and examples of smart systems for LDSL are disclosed. In accordance with embodiments of the invention, there is disclosed a method for implementing smart DSL for LDSL systems. Embodiments of the method may comprise presenting a number of spectral masks that are available on the LDSL system, and selecting from the number of spectral masks an upstream mask and a downstream mask wherein the upstream mask and the downstream mask exhibit complimentary features.

摘要翻译： 公布了用于解决LDSL性能目标的“智能DSL系统”和LDSL智能系统的示例。 根据本发明的实施例，公开了一种用于实现LDSL系统的智能DSL的方法。 该方法的实施例可以包括呈现在LDSL系统上可用的多个频谱掩模，以及从频谱掩模的数量中选择上游掩模和下游掩模，其中上游掩码和下游掩模表现出互补特征。

公开(公告)号：US20040202239A1

公开(公告)日：2004-10-14

申请号：US10714655

申请日：2003-11-18

申请人： Globespan Virata Incorporated

发明人： Patrick Duvaut ,  Ehud Langberg ,  Lujing Cai ,  Laurent Pierrugues ,  William Scholtz ,  Oliver Moreno ,  Feng Ouyang

IPC分类号： H04B001/38

CPC分类号： H04L5/143 ,  H04L5/1438 ,  H04L27/2626 ,  H04Q2213/13039

摘要： An evaluation of the spectral compatibility of two LDSL modes based on two different downstream masks, identified herein as LDSL Wide and Narrow, is disclosed. Spectral compatibility is evaluated in accordance with existing rules.

摘要翻译： 公开了基于两种不同下游掩模的两种LDSL模式的频谱兼容性的评估，这两种不同的下行掩码在本文中被标识为LDSL Wide和Narrow。 光谱兼容性根据现有规则进行评估。

公开(公告)号：US20030223518A1

公开(公告)日：2003-12-04

申请号：US10393345

申请日：2003-03-21

申请人： Globespan Virata Incorporated

发明人： Faina Shmulyian ,  Ehud Langberg ,  Patrick Duvaut

IPC分类号： H04L001/00 ,  H03D001/04

CPC分类号： H04B1/1036 ,  H04B1/123 ,  H04B15/02 ,  H04L1/206 ,  H04L27/2647

摘要： Disclosed herein are various mechanisms for the adaptive cancellation of radio frequency interference (RFI) in Discrete Multitone (DMT)-based signal transmissions systems. various mechanisms for the adaptive cancellation of radio frequency interference (RFI) in Discrete Multitone (DMT) modulated signal transmissions systems. In at least one embodiment of the present invention, RFI introduced by one or more RFI disturbers (e.g., ham radios) into a DMT modulated signal may be detected by calculating an RFI canceller coefficient for some or all of the DMT bins of the signal, where the RFI canceller coefficient represents the correlation between the noise at the corrupted bin and the reference RFI noise. The RFI canceller coefficients for the corrupted bins may be calculated using an LMS adaptation process. Those bins where the magnitude of the corresponding RFI canceller coefficient is greater than a certain threshold may be marked as corrupted by RFI. Further, one or more bins having RFI canceller coefficients with the largest magnitudes may be marked as reference disturber bins. The noise (e.g., error) present in the identified reference disturber bins may be determined using, for example, the slicer error. The RFI disturbance at some or all of the corrupted bins then may be estimated based at least in part on the error of the reference disturber bin proximal to the corrupted bin and the RFI canceller coefficient for the corrupted bin. The received signal then may be adjusted based on the RFI estimations for some or all of the corrupted bins to reduce or eliminate the RFI disturbance in the signal.

摘要翻译： 本文公开了用于基于离散多音（DMT）的信号传输系统中的射频干扰（RFI）的自适应消除的各种机制。 用于在离散多音（DMT）调制信号传输系统中自适应消除射频干扰（RFI）的各种机制。 在本发明的至少一个实施例中，由一个或多个RFI干扰器（例如，火腿无线电）引入的RFI到DMT调制信号中的RFI可以通过计算信号的一些或全部DMT信号的RFI消除器系数来检测， 其中RFI消除器系数表示损坏的箱的噪声与参考RFI噪声之间的相关性。 可以使用LMS适应过程来计算损坏的箱的RFI消除器系数。 那些相应RFI消除器系数的大小大于某个阈值的那些存储区可能被标记为被RFI损坏。 此外，具有最大幅度的具有RFI消除器系数的一个或多个箱可被标记为参考干扰箱。 存在于所识别的参考干扰箱中的噪声（例如，误差）可以使用例如限幅器误差来确定。 部分或全部损坏的垃圾箱的RFI扰动可以至少部分地基于靠近损坏的垃圾箱的参考干扰箱的误差以及损坏的箱的RFI消除器系数来估计。 然后可以基于对于一些或所有损坏的箱的RFI估计来调整所接收的信号，以减少或消除信号中的RFI干扰。

公开(公告)号：US20040202240A1

公开(公告)日：2004-10-14

申请号：US10714660

申请日：2003-11-18

申请人： Globespan Virata Incorporated

发明人： Patrick Duvaut ,  Lujing Cai ,  Massimo Sorbara

IPC分类号： H04B001/38

CPC分类号： H04L12/2854 ,  H04Q2213/13039

摘要： A nullSmart DSL Systemnull for addressing the performance objectives of LDSL and examples of smart systems for LDSL are disclosed. In accordance with embodiments of the invention, there is disclosed a method for implementing smart DSL for LDSL systems. Embodiments of the method include presenting a number of spectral masks that are available on the LDSL system, and selecting from the number of spectral masks an upstream mask and a downstream mask wherein the upstream mask and the downstream mask exhibit complimentary features.

摘要翻译： 公布了用于解决LDSL性能目标的“智能DSL系统”和LDSL智能系统的示例。 根据本发明的实施例，公开了一种用于实现LDSL系统的智能DSL的方法。 该方法的实施例包括呈现在LDSL系统上可用的多个频谱掩模，以及从频谱掩模的数量中选择上游掩模和下游掩模，其中上游掩码和下游掩模具有互补特征。

公开(公告)号：US20040136329A1

公开(公告)日：2004-07-15

申请号：US10714907

申请日：2003-11-18

申请人： Globespan Virata Incorporated

发明人： Patrick Duvaut ,  Ehud Langberg

IPC分类号： H04L012/26

CPC分类号： H04Q11/04 ,  H04Q2213/13039 ,  H04Q2213/13094 ,  H04Q2213/13204 ,  H04Q2213/13396

摘要： The present invention overcomes all of the aforementioned 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）的掩码可选系统来克服所有上述问题，其中唯一的调制解调器 在握手期间功能被激活以在频谱兼容性方面自动检查物理层状态，并因此使用掩模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。