公开(公告)号：US09621883B2

公开(公告)日：2017-04-11

申请号：US14713454

申请日：2015-05-15

申请人： JDS Uniphase Corporation

发明人： Jim Walsh ,  Ching-Chang Liao

IPC分类号： H04B3/46 ,  H04B17/00 ,  H04Q1/20 ,  H04N17/00 ,  H04B10/073 ,  H04B10/2575 ,  H04N21/61 ,  H04N21/647

CPC分类号： H04N17/004 ,  H04B10/073 ,  H04B10/25751 ,  H04N17/00 ,  H04N21/6168 ,  H04N21/64723 ,  H04N21/64738

摘要： The invention relates to a method and apparatus for evaluating a network and for predicting network performance for a higher order modulation by analyzing network signals modulated using a lower order modulation format. A margin index may be generated for the current or projected modulation formats based on displacement vectors for received symbols to indicate a margin remaining before a codeword error occurs to alert the network operator of potential performance issues before actual codeword errors occur.

公开(公告)号：US09357163B2

公开(公告)日：2016-05-31

申请号：US14033077

申请日：2013-09-20

申请人： JDS Uniphase Corporation

发明人： Ben Maxson ,  Daniel K. Chappell ,  Jim Walsh

IPC分类号： H04N7/173 ,  H04N7/10 ,  H04H20/12 ,  H04L12/28 ,  H04N17/00 ,  H04N21/2383 ,  H04N21/61 ,  H04N21/4402 ,  H04N21/2343

CPC分类号： H04B3/46 ,  H04B17/0082 ,  H04H20/12 ,  H04L12/2801 ,  H04L27/2626 ,  H04N7/102 ,  H04N17/00 ,  H04N21/234354 ,  H04N21/2383 ,  H04N21/440254 ,  H04N21/6118

摘要： Methods and devices for characterization of repetitious noise in cable networks are disclosed. A frequency band of interest is identified, a time trace of a signal parameter within the frequency band is obtained, and an autocorrelation of the time trace is computed to detect repetitious noise. The repetition frequency can serve as an indicator of the noise source type, and thus it can assist in noise segmentation.

摘要翻译： 公开了用于表征电缆网络中的重复噪声的方法和装置。 识别感兴趣的频带，获得频带内的信号参数的时间轨迹，并且计算时间轨迹的自相关以检测重复噪声。 重复频率可以作为噪声源类型的指标，因此可以帮助噪声分割。

公开(公告)号：US09036687B2

公开(公告)日：2015-05-19

申请号：US13847369

申请日：2013-03-19

申请人： JDS Uniphase Corporation

发明人： Jim Walsh ,  Ching-Chang Liao

IPC分类号： H04B3/46 ,  H04B17/00 ,  H04Q1/20 ,  H04N17/00

CPC分类号： H04N17/004 ,  H04B10/073 ,  H04B10/25751 ,  H04N17/00 ,  H04N21/6168 ,  H04N21/64723 ,  H04N21/64738

摘要： The invention relates to a method and apparatus for evaluating a network and for predicting network performance for a higher order modulation by analyzing network signals modulated using a lower order modulation format. A margin index may be generated for the current or projected modulation formats based on displacement vectors for received symbols to indicate a margin remaining before a codeword error occurs to alert the network operator of potential performance issues before actual codeword errors occur.

摘要翻译： 本发明涉及一种用于评估网络并通过分析使用低阶调制格式调制的网络信号来预测高阶调制的网络性能的方法和装置。 可以基于接收到的符号的位移向量为当前或预测的调制格式生成余量索引，以指示在发生码字错误之前剩余的余量，以在实际的码字错误发生之前警告网络运营商潜在的性能问题。