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1. 发明申请

US20050018837A1 Method and system for mitigating fourier transform side lobes 有权
标题翻译：减轻傅里叶变换旁瓣的方法和系统
公开(公告)号：US20050018837A1
公开(公告)日：2005-01-27
申请号：US10849569
申请日：2004-05-20
申请人： Patrick Duvaut , Ehud Langberg , Albert Rapaport , William Sholtz , Faina Shmulyian
发明人： Patrick Duvaut , Ehud Langberg , Albert Rapaport , William Sholtz , Faina Shmulyian
IPC分类号： H04L27/26 , H04M1/24 , H04M3/08 , H04M3/22
CPC分类号： H04L27/2602 , H04L27/2614
摘要： The present invention is directed to implementing theoretical foundations of frequency domain methods aiming to locally decrease the impact of aggregate side lobes of a few discrete frequency tones, in the vicinity of other “victim” frequencies. The family of frequency methods referred to makes use of one or more “canceller tones.” The “canceller tones” loads are optimized to minimize the aggregate power in the neighborhood of the victim frequencies. An exemplary method for decreasing an impact of aggregate side lobes of one or more discrete frequency tones in the vicinity of one or more victim tones comprises the steps of calculating an aggregate power of one or more side lobes of one or more disturber tones within a victim bandwidth; determining at least one optimal load to minimize the aggregate power wherein the at least one optimal load comprises a linear combination of the one or more disturber tones; and applying the at least one optimal load to one or more canceller tones for minimizing the impact of the one or more side lobes of the one or more disturber tones.
摘要翻译：本发明旨在实现频域方法的理论基础，旨在局部地减小在其他“受害者”频率附近的几个离散频率的聚集旁瓣的影响。所提及的频率方法族使用一个或多个“消除音”。优化“消除音”负载以最小化受害者频率附近的总功率。减少一个或多个受害音调附近的一个或多个离散频率音调的聚集旁瓣的影响的示例性方法包括以下步骤：计算受害者中一个或多个干扰音的一个或多个旁波的总功率带宽; 确定至少一个最佳负载以最小化所述总功率，其中所述至少一个最佳负载包括所述一个或多个干扰调制音的线性组合; 以及将所述至少一个最佳负载应用于一个或多个消除器音调，以最小化一个或多个干扰音调的一个或多个旁瓣的影响。

2. 发明授权

US07457353B2 Method and system for mitigating Fourier transform side lobes 有权
标题翻译：用于减轻傅立叶变换旁瓣的方法和系统
公开(公告)号：US07457353B2
公开(公告)日：2008-11-25
申请号：US10849569
申请日：2004-05-20
申请人： Patrick Duvaut , Ehud Langberg , Albert Rapaport , William Sholtz , Faina Shmulyian
发明人： Patrick Duvaut , Ehud Langberg , Albert Rapaport , William Sholtz , Faina Shmulyian
IPC分类号： H04B1/38 , H04B3/20 , H04M9/08
CPC分类号： H04L27/2602 , H04L27/2614
摘要： The present invention is directed to implementing theoretical foundations of frequency domain methods aiming to locally decrease the impact of aggregate side lobes of a few discrete frequency tones, in the vicinity of other “victim” frequencies. The family of frequency methods referred to makes use of one or more “canceller tones.” The “canceller tones” loads are optimized to minimize the aggregate power in the neighborhood of the victim frequencies. An exemplary method for decreasing an impact of aggregate side lobes of one or more discrete frequency tones in the vicinity of one or more victim tones comprises the steps of calculating an aggregate power of one or more side lobes of one or more disturber tones within a victim bandwidth; determining at least one optimal load to minimize the aggregate power wherein the at least one optimal load comprises a linear combination of the one or more disturber tones; and applying the at least one optimal load to one or more canceller tones for minimizing the impact of the one or more side lobes of the one or more disturber tones.
摘要翻译：本发明旨在实现频域方法的理论基础，旨在局部地减小在其他“受害者”频率附近的几个离散频率的聚集旁瓣的影响。所提及的频率方法族使用一个或多个“消除音”。优化“消除音”负载以最小化受害者频率附近的总功率。减少一个或多个受害音调附近的一个或多个离散频率音调的聚集旁瓣的影响的示例性方法包括以下步骤：计算受害者中一个或多个干扰音的一个或多个旁波的总功率带宽; 确定至少一个最佳负载以最小化所述总功率，其中所述至少一个最佳负载包括所述一个或多个干扰调制音的线性组合; 以及将所述至少一个最佳负载应用于一个或多个消除器音调，以最小化一个或多个干扰音调的一个或多个旁瓣的影响。

3. 发明授权

US07120211B2 Adaptive RFI canceller for DSL 有权
公开(公告)号：US07120211B2
公开(公告)日：2006-10-10
申请号：US10393345
申请日：2003-03-21
申请人： Faina Shmulyian , Ehud Langberg , Patrick Duvaut
发明人： Faina Shmulyian , Ehud Langberg , Patrick Duvaut
IPC分类号： H04L1/00
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.

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