公开(公告)号：US20110013734A1

公开(公告)日：2011-01-20

申请号：US12891539

申请日：2010-09-27

申请人： Ambroise POPPER ,  Fabien BUDA ,  Hikmet SARI

发明人： Ambroise POPPER ,  Fabien BUDA ,  Hikmet SARI

IPC分类号： H04B1/10

CPC分类号： G11B20/22 ,  H04B1/123 ,  H04N7/102

摘要： The invention provides a device (D2) for reducing ingress noise in a digital signal, comprising a noise predictor (20) for predicting an amount of ingress noise in the digital signal (sn) based on past samples of the ingress noise, and a subtractor (21) for subtracting the predicted amount of ingress noise from the digital signal. Channel distortion is compensated for by a noise-independent equalizer (25), such as a ZF equalizer, placed upstream of the noise predictor (20). The device (D2) may be incorporated, for example, in a cable modem termination system (CMTS) of an hybrid fiber/coax (HFC) network.

摘要翻译： 本发明提供了一种用于减少数字信号中的入噪声的装置（D2），包括：用于根据进入噪声的过去样本预测数字信号（sn）中入侵噪声量的噪声预测器（20），以及减法器 （21），用于从数字信号中减去预测入侵噪声量。 信道失真由位于噪声预测器（20）上游的无噪声均衡器（25）补偿，诸如ZF均衡器。 设备（D2）可以例如并入混合光纤/同轴电缆（HFC）网络的电缆调制解调器终端系统（CMTS）中。

公开(公告)号：US20060256898A1

公开(公告)日：2006-11-16

申请号：US11460287

申请日：2006-07-27

申请人： Ambroise POPPER ,  Fabien BUDA ,  Hikmet SARI

发明人： Ambroise POPPER ,  Fabien BUDA ,  Hikmet SARI

IPC分类号： H03D1/04

CPC分类号： G11B20/22 ,  H04B1/123 ,  H04N7/102

摘要： The invention provides a device (D2) for reducing ingress noise in a digital signal, comprising a noise predictor (20) for predicting an amount of ingress noise in the digital signal (sn) based on past samples of the ingress noise, and a subtractor (21) for subtracting the predicted amount of ingress noise from the digital signal. Channel distortion is compensated for by a noise-independent equalizer (25), such as a ZF equalizer, placed upstream of the noise predictor (20). The device (D2) may be incorporated, for example, in a cable modem termination system (CMTS) of an hybrid fiber/coax (HFC) network.

摘要翻译： 本发明提供了一种用于减少数字信号中的入噪声的装置（D 2），包括用于基于过去预测数字信号（s）中入侵噪声量的噪声预测器（20） 入侵噪声的样本，以及用于从数字信号中减去预测入侵噪声量的减法器（21）。 信道失真由位于噪声预测器（20）上游的无噪声均衡器（25）补偿，诸如ZF均衡器。 装置（D 2）可以并入例如混合光纤/同轴电缆（HFC）网络的电缆调制解调器终端系统（CMTS）中。

公开(公告)号：US20090185647A1

公开(公告)日：2009-07-23

申请号：US12408555

申请日：2009-03-20

申请人： Ambroise POPPER

发明人： Ambroise POPPER

IPC分类号： H04L27/06

CPC分类号： H04L27/0014 ,  H04L2027/002 ,  H04L2027/0065 ,  H04L2027/0077

摘要： The invention performs frequency estimation over both the burst preamble, during which known symbols are transmitted, and also during the burst's data packet, which is subsequent to the preamble and extracted by the local detector. During the preamble, an initial frequency estimate is obtained. This estimate is based on a time average of either phase or correlation samples. Atypical phase or correlation samples, attributable to detector symbol errors during the data packet, are detected and filtered, so as to avoid including the atypical samples in a time-averages used to provide the frequency estimate. In a first embodiment correlation samples are time averaged, and atypical correlation samples are suppressed prior to correlation time averaging. In a second embodiment, phase slope values are time averaged, and atypical values of phase slope are suppressed prior to phase slope time averaging.

摘要翻译： 本发明在脉冲串前同步码之间执行频率估计，在该前导码期间，已知的符号被发送，并且在突发的数据分组中，其在前导码之后并由本地检测器提取。 在前导码中，获得初始频率估计。 该估计是基于任一阶段或相关样本的时间平均值。 检测并过滤归因于数据分组期间的检测器符号错误的非典型相位或相关样本，以避免在用于提供频率估计的时间平均值中包括非典型样本。 在第一实施例中，相关样本是时间平均的，并且非相关样本在相关时间平均之前被抑制。 在第二实施例中，相位斜率值是时间平均的，相位斜率的非典型值在相位斜率时间平均之前被抑制。

公开(公告)号：US20070116159A1

公开(公告)日：2007-05-24

申请号：US11626685

申请日：2007-01-24

申请人： Ambroise POPPER

发明人： Ambroise POPPER

IPC分类号： H04L27/06

CPC分类号： H04L27/0014 ,  H04L2027/002 ,  H04L2027/0065 ,  H04L2027/0077

摘要： The invention performs frequency estimation over both the burst preamble, during which known symbols are transmitted, and also during the burst's data packet, which is subsequent to the preamble and extracted by the local detector. During the preamble, an initial frequency estimate is obtained. This estimate is based on a time average of either phase or correlation samples. Atypical phase or correlation samples, attributable to detector symbol errors during the data packet, are detected and filtered, so as to avoid including the atypical samples in a time-averages used to provide the frequency estimate. In a first embodiment correlation samples are time averaged, and atypical correlation samples are suppressed prior to correlation time averaging. In a second embodiment, phase slope values are time averaged, and atypical values of phase slope are suppressed prior to phase slope time averaging.

摘要翻译： 本发明在脉冲串前同步码之间执行频率估计，在该前导码期间，已知的符号被发送，并且在突发的数据分组中，其在前导码之后并由本地检测器提取。 在前导码中，获得初始频率估计。 该估计是基于任一阶段或相关样本的时间平均值。 检测并过滤归因于数据分组期间的检测器符号错误的非典型相位或相关样本，以避免在用于提供频率估计的时间平均值中包括非典型样本。 在第一实施例中，相关样本是时间平均的，并且非相关样本在相关时间平均之前被抑制。 在第二实施例中，相位斜率值是时间平均的，相位斜率的非典型值在相位斜率时间平均之前被抑制。