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公开(公告)号：US20130051793A1
公开(公告)日：2013-02-28
申请号：US13253016
申请日：2011-10-04
CPC分类号： H04B10/2569
摘要： A method of monitoring a differential group delay, DGD, of an optical communications signal having a polarisation multiplexed modulation format is described. The method includes the steps of receiving a signal and performing analogue to digital conversion of the signal to generate a digitised signal corresponding to one polarisation of the signal and to generate another digitised signal corresponding to another polarisation of the signal, and applying a polarisation mode dispersion, PMD, compensation to each of the digitised signals. The method further includes the steps of obtaining an indication of the channel transfer function of the optical communications signal, determining a DGD in dependence on the indication of the channel transfer function, determining a delay between the PMD compensated digitised signals, subtracting the delay from the DGD to obtain a corrected DGD, and generating and transmitting a monitoring signal with an indication of the corrected DGD.
摘要翻译： 描述了具有偏振复用调制格式的光通信信号的差分组延迟DGD的监视方法。 该方法包括以下步骤：接收信号并执行信号的模数转换以产生对应于信号的一个极化的数字化信号，并产生对应于该信号的另一极化的另一数字化信号，以及施加偏振模色散 ，PMD，补偿每个数字化信号。 该方法还包括以下步骤：获得光通信信号的信道传递函数的指示，根据信道传递函数的指示确定DGD，确定PMD补偿的数字化信号之间的延迟，减去从 DGD以获得校正的DGD，以及生成并发送具有校正的DGD的指示的监视信号。
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公开(公告)号：US08824886B2
公开(公告)日：2014-09-02
申请号：US13253016
申请日：2011-10-04
CPC分类号： H04B10/2569
摘要： A method of monitoring a differential group delay (DGD) of an optical communications signal having a polarisation multiplexed modulation format is described. The method includes the operations of receiving a signal and performing analogue to digital conversion of the signal to generate a digitised signal corresponding to one polarisation of the signal and to generate another digitised signal corresponding to another polarisation of the signal, and applying a polarisation mode dispersion(PMD) compensation to each of the digitised signals. The method further includes the operations of obtaining an indication of the channel transfer function of the optical communications signal, determining a DGD in dependence on the indication of the channel transfer function, determining a delay between the PMD compensated digitised signals, subtracting the delay from the DGD to obtain a corrected DGD, and generating and transmitting a monitoring signal with an indication of the corrected DGD.
摘要翻译： 描述了监视具有偏振复用调制格式的光通信信号的差分组延迟（DGD）的方法。 该方法包括接收信号并执行信号的模数转换以产生对应于信号的一个极化的数字化信号并产生对应于该信号的另一极化的另一个数字化信号的操作，以及施加偏振模色散 （PMD）补偿到每个数字化信号。 该方法还包括获得光通信信号的信道传递函数的指示的操作，根据信道传递函数的指示确定DGD，确定PMD补偿的数字化信号之间的延迟，减去从 DGD以获得校正的DGD，以及生成并发送具有校正的DGD的指示的监视信号。
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公开(公告)号：US09425900B2
公开(公告)日：2016-08-23
申请号：US14382536
申请日：2012-03-02
IPC分类号： H04B10/61 , H04B10/079 , H04B10/2513 , H04B10/69 , H04L27/01
CPC分类号： H04B10/6161 , H04B10/07951 , H04B10/25133 , H04B10/6971 , H04L27/01
摘要： Chromatic dispersion (CD) processing apparatus comprises an equalizer loop comprising: a frequency domain equalizer (FDE) arranged to receive samples of an electrical representation of an optical communications signal having CD and to apply CD compensation to the samples, to form dispersion corrected samples having a residual CD value; a time domain equalizer arranged to receive the corrected samples and to generate a representation of a channel linear transfer function of the signal from the corrected samples, to generate and transmit a monitoring signal comprising said representation; optical performance monitoring apparatus arranged to receive the monitoring signal and to estimate the residual CD value; and a processor arranged to receive the estimated residual value and to compare it to a threshold value and to generate and transmit to the FDE an estimation signal comprising the estimated value unless it is less than the threshold.
摘要翻译： 色散（CD）处理装置包括均衡器环路，包括：频域均衡器（FDE），被布置为接收具有CD的光通信信号的电表示的样本，并对样本应用CD补偿，以形成色散校正样本， 剩余CD值; 时域均衡器，被布置成接收经校正的样本并且产生来自校正样本的信号的信道线性传递函数的表示，以产生并发送包括所述表示的监视信号; 光学性能监视装置，被配置为接收监视信号并估计残余CD值; 以及处理器，被布置为接收估计的残余值并将其与阈值进行比较，并且生成并向FDE发送包括估计值的估计信号，除非其小于阈值。
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公开(公告)号：US20150229410A1
公开(公告)日：2015-08-13
申请号：US14382536
申请日：2012-03-02
IPC分类号： H04B10/61 , H04L27/01 , H04B10/079
CPC分类号： H04B10/6161 , H04B10/07951 , H04B10/25133 , H04B10/6971 , H04L27/01
摘要： Chromatic dispersion (CD) processing apparatus comprises an equalizer loop comprising: a frequency domain equaliser (FDE) arranged to receive samples of an electrical representation of an optical communications signal having CD and to apply CD compensation to the samples, to form dispersion corrected samples having a residual CD value; a time domain equaliser arranged to receive the corrected samples and to generate a representation of a channel linear transfer function of the signal from the corrected samples, to generate and transmit a monitoring signal comprising said representation; optical performance monitoring apparatus arranged to receive the monitoring signal and to estimate the residual CD value; and a processor arranged to receive the estimated residual value and to compare it to a threshold value and to generate and transmit to the FDE an estimation signal comprising the estimated value unless it is less than the threshold.
摘要翻译： 色散（CD）处理装置包括均衡器环路，包括：频域均衡器（FDE），被布置为接收具有CD的光通信信号的电表示的样本，并对样本应用CD补偿，以形成色散校正样本， 剩余CD值; 时域均衡器，被布置成接收经校正的样本并且产生来自校正样本的信号的信道线性传递函数的表示，以产生并发送包括所述表示的监视信号; 光学性能监视装置，被配置为接收监视信号并估计残余CD值; 以及处理器，被布置为接收估计的残余值并将其与阈值进行比较，并且生成并向FDE发送包括估计值的估计信号，除非其小于阈值。
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