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公开(公告)号：US09973277B2
公开(公告)日：2018-05-15
申请号：US15131798
申请日：2016-04-18
IPC分类号： H04B10/588 , H04B10/2543 , H04B10/516 , H04B10/69 , H04B10/61
CPC分类号： H04B10/2543 , H04B10/516 , H04B10/588 , H04B10/6163 , H04B10/697
摘要： Aspects of the present invention provide techniques for compensating nonlinear impairments of a signal traversing an optical communications system. A parallel array of linear convolutional filters are configured to process a selected set of samples of the signal to generate an estimate of a nonlinear interference field. The predetermined set of samples comprises a first sample and a plurality of second samples. A processor applies the estimated nonlinear interference field to the first sample to least partially compensate the nonlinear impairment.
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公开(公告)号：US09319137B2
公开(公告)日：2016-04-19
申请号：US14480739
申请日：2014-09-09
IPC分类号： H04B10/2543 , H04B10/516 , H04B10/61 , H04B10/69
CPC分类号： H04B10/2543 , H04B10/516 , H04B10/588 , H04B10/6163 , H04B10/697
摘要： Aspects of the present invention provide techniques for compensating nonlinear impairments of a signal traversing an optical communications system. A parallel array of linear convolutional filters are configured to process a selected set of samples of the signal to generate an estimate of a nonlinear interference field. The predetermined set of samples comprises a first sample and a plurality of second samples. A processor applies the estimated nonlinear interference field to the first sample to least partially compensate the nonlinear impairment.
摘要翻译： 本发明的各方面提供了用于补偿穿过光通信系统的信号的非线性损伤的技术。 线性卷积滤波器的并行阵列被配置为处理所选信号的采样集合以产生非线性干扰场的估计。 预定的一组样本包括第一样本和多个第二样本。 处理器将估计的非线性干扰场应用于第一样本以最小化部分地补偿非线性损伤。
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公开(公告)号：US09768875B2
公开(公告)日：2017-09-19
申请号：US14644320
申请日：2015-03-11
IPC分类号： H04B10/00 , H04B10/04 , H04B10/532 , H04B10/2557 , H04B10/50 , H04B10/61 , H04B10/564
CPC分类号： H04B10/532 , H04B10/2557 , H04B10/5055 , H04B10/564 , H04B10/61
摘要： A method of transmitting a data signal using an optical transmitter of an optical communications system. The optical transmitter is configured to modulate an optical carrier in successive signalling intervals to generate an optical signal. A modulation scheme is provided which comprises a multi-dimensional symbol constellation. The modulation scheme is designed such that an average degree of polarization of a modulated optical signal output from the optical transmitter has a first value when averaged across a first signalling interval, and has a second value when averaged across more than one and fewer than 100 signalling intervals. The second value is less than 10 percent of the first value. During run-time, an encoder of the optical transmitter encoding a data signal to be transmitted as symbols of the constellation, and a modulator of the optical transmitter modulating available dimensions of the optical carrier in accordance with the symbols.
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公开(公告)号：US09768880B2
公开(公告)日：2017-09-19
申请号：US14717762
申请日：2015-05-20
IPC分类号： H04B10/58 , H04J14/02 , H04B10/2507 , H04B10/2557 , H04B10/2563 , H04B10/564
CPC分类号： H04B10/58 , H04B10/2557 , H04B10/2563 , H04B10/2572 , H04B10/564 , H04B2210/254 , H04J14/0221
摘要： A method for preventing nonlinear interference in an optical communication system. The method may include selecting an optical signal of a first optical channel. The method may include determining an estimate of inter-channel nonlinear interference to the optical signal of the first optical channel. The inter-channel nonlinear interference may be generated by one or more optical signals transmitted over a second optical channel in the optical communication system. The method may include determining one or more linear filters based on the estimate of the inter-channel nonlinear interference. The method may include pre-distorting an optical signal for transmission over the second optical channel using the one or more linear filters. The pre-distorted optical signal may be configured for reducing the inter-channel nonlinear interference to the first optical signal of the first optical channel. The method may include transmitting the pre-distorted optical signal over the second optical channel through an optical transmission medium.
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公开(公告)号：US20160344482A1
公开(公告)日：2016-11-24
申请号：US14717762
申请日：2015-05-20
IPC分类号： H04B10/58 , H04J14/02 , H04B10/2507 , H04B10/564 , H04B10/2557
CPC分类号： H04B10/58 , H04B10/2557 , H04B10/2563 , H04B10/2572 , H04B10/564 , H04B2210/254 , H04J14/0221
摘要： A method for preventing nonlinear interference in an optical communication system. The method may include selecting an optical signal of a first optical channel. The method may include determining an estimate of inter-channel nonlinear interference to the optical signal of the first optical channel. The inter-channel nonlinear interference may be generated by one or more optical signals transmitted over a second optical channel in the optical communication system. The method may include determining one or more linear filters based on the estimate of the inter-channel nonlinear interference. The method may include pre-distorting an optical signal for transmission over the second optical channel using the one or more linear filters. The pre-distorted optical signal may be configured for reducing the inter-channel nonlinear interference to the first optical signal of the first optical channel. The method may include transmitting the pre-distorted optical signal over the second optical channel through an optical transmission medium.
摘要翻译： 一种用于防止光通信系统中的非线性干扰的方法。 该方法可以包括选择第一光信道的光信号。 该方法可以包括确定对第一光学信道的光信号的信道间非线性干扰的估计。 信道间非线性干扰可以由在光通信系统中通过第二光信道发射的一个或多个光信号产生。 该方法可以包括基于信道间非线性干扰的估计来确定一个或多个线性滤波器。 该方法可以包括使用一个或多个线性滤波器对光信号进行预失真以在第二光学信道上进行传输。 预失真的光信号可以被配置为减少对第一光信道的第一光信号的信道间非线性干扰。 该方法可以包括通过光传输介质在第二光信道上发送预失真的光信号。
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公开(公告)号：US10270537B2
公开(公告)日：2019-04-23
申请号：US15707476
申请日：2017-09-18
IPC分类号： H04B10/2507 , H04B10/2563 , H04B10/2557 , H04B10/58 , H04B10/564 , H04J14/02
摘要： A method for preventing nonlinear interference in an optical communication system. The method may include selecting an optical signal of a first optical channel. The method may include determining an estimate of inter-channel nonlinear interference to the optical signal of the first optical channel. The inter-channel nonlinear interference may be generated by one or more optical signals transmitted over a second optical channel in the optical communication system. The method may include determining one or more linear filters based on the estimate of the inter-channel nonlinear interference. The method may include pre-distorting an optical signal for transmission over the second optical channel using the one or more linear filters. The pre-distorted optical signal may be configured for reducing the inter-channel nonlinear interference to the first optical signal of the first optical channel. The method may include transmitting the pre-distorted optical signal over the second optical channel through an optical transmission medium.
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公开(公告)号：US20180083712A1
公开(公告)日：2018-03-22
申请号：US15707476
申请日：2017-09-18
IPC分类号： H04B10/58 , H04J14/02 , H04B10/564 , H04B10/2507 , H04B10/2563 , H04B10/2557
CPC分类号： H04B10/58 , H04B10/2557 , H04B10/2563 , H04B10/2572 , H04B10/564 , H04B2210/254 , H04J14/0221
摘要： A method for preventing nonlinear interference in an optical communication system. The method may include selecting an optical signal of a first optical channel. The method may include determining an estimate of inter-channel nonlinear interference to the optical signal of the first optical channel. The inter-channel nonlinear interference may be generated by one or more optical signals transmitted over a second optical channel in the optical communication system. The method may include determining one or more linear filters based on the estimate of the inter-channel nonlinear interference. The method may include pre-distorting an optical signal for transmission over the second optical channel using the one or more linear filters. The pre-distorted optical signal may be configured for reducing the inter-channel nonlinear interference to the first optical signal of the first optical channel. The method may include transmitting the pre-distorted optical signal over the second optical channel through an optical transmission medium.
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公开(公告)号：US10439751B2
公开(公告)日：2019-10-08
申请号：US15796393
申请日：2017-10-27
IPC分类号： H04B10/079 , H04B10/294 , H04J14/02 , H04Q11/00 , H04B10/58 , H04B10/2557 , H04B10/255
摘要： Multiple receivers are comprised in a flexible coherent transceiver of a multi-span optical fiber network. Each of the multiple receivers is operative to handle communications on a respective channel. The multiple receivers measure optical characteristics. For each of the multiple receivers, the optical characteristics include optical nonlinear interactions on the respective channel, the optical nonlinear interactions being at least partially dependent from one span to another span. An optical power of a signal on each of the multiple channels is adjusted as a function of the optical characteristics.
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公开(公告)号：US10090920B1
公开(公告)日：2018-10-02
申请号：US15461718
申请日：2017-03-17
IPC分类号： H04B10/079 , H04B10/2507 , G06N99/00
摘要： A method of fiber Kerr nonlinear noise estimation in an optical transmission system comprises recovering received symbols from a received signal, isolating a noise component of the received signal, estimating coefficients of a matrix based on cross-correlations between the isolated noise component and the fields of a triplet of received symbols or training symbols or estimated transmitted symbols, estimating doublet correlations of the product or the quotient of the isolated noise component and the field of a received symbol or of a training symbol or of an estimated transmitted symbol, and estimating one or more parameters related to nonlinear noise based on the estimated coefficients of the matrix and based on the estimated doublet correlations.
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公开(公告)号：US20180343078A1
公开(公告)日：2018-11-29
申请号：US15796393
申请日：2017-10-27
IPC分类号： H04J14/02 , H04B10/079 , H04Q11/00 , H04B10/58
CPC分类号： H04J14/0221 , H04B10/0793 , H04B10/07955 , H04B10/2543 , H04B10/255 , H04B10/2557 , H04B10/58 , H04B2210/254 , H04J14/0275 , H04Q11/0066 , H04Q2011/0041 , H04Q2011/0083
摘要： Multiple receivers are comprised in a flexible coherent transceiver of a multi-span optical fiber network. Each of the multiple receivers is operative to handle communications on a respective channel. The multiple receivers measure optical characteristics. For each of the multiple receivers, the optical characteristics include optical nonlinear interactions on the respective channel, the optical nonlinear interactions being at least partially dependent from one span to another span. An optical power of a signal on each of the multiple channels is adjusted as a function of the optical characteristics.
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