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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：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：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：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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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：US10236982B1
公开(公告)日：2019-03-19
申请号：US15849940
申请日：2017-12-21
申请人： Qunbi Zhuge , Maurice O'Sullivan
发明人： Qunbi Zhuge , Maurice O'Sullivan
IPC分类号： H04B10/073 , H04B10/2513 , H04B10/2543 , H04B10/079 , H04B10/077 , G06F15/18 , G06N20/00
摘要： Technology for fiber parameter identification in an optical communications network is described. One or more C-matrices are calculated from one or more corresponding signals received at a receiver from a transmitter over a link in the optical communications network, where each C-matrix comprises a plurality of C-coefficients representative of nonlinear noise in the received signal. A combination of chromatic dispersion (CD) pre-compensation applied at the transmitter and CD post-compensation applied at the receiver may substantially compensate for a net CD of the link. The one or more C-matrices are used to identify one or more fiber parameter estimates of the link, such as one or more fiber types, one or more nonlinear coefficients, or one or more dispersion coefficients. A controller of the optical communications network may use the identified fiber parameters estimates to control a state of the network to achieve an objective, such as improved network performance.
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公开(公告)号：US10014947B2
公开(公告)日：2018-07-03
申请号：US15046763
申请日：2016-02-18
申请人： Qunbi Zhuge , Kevin Farley , Kim Roberts , Maurice O'Sullivan
发明人： Qunbi Zhuge , Kevin Farley , Kim Roberts , Maurice O'Sullivan
CPC分类号： H04B10/40 , H04B10/0799 , H04B10/5561 , H04B10/588 , H04B10/616 , H04L1/0042 , H04L7/0075
摘要： A digital instruction is generated regarding one or more electrical-to-optical conversion impairments induced at the transmitter of an optical communication system. The digital instruction may be used by the transmitter to reduce the impairments. Alternatively, or additionally, the digital instruction may be used by the receiver of the optical communication system to compensate for the impairments.
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公开(公告)号：US20170244489A1
公开(公告)日：2017-08-24
申请号：US15046763
申请日：2016-02-18
申请人： Qunbi ZHUGE , Kevin FARLEY , Kim ROBERTS , Maurice O'Sullivan
发明人： Qunbi ZHUGE , Kevin FARLEY , Kim ROBERTS , Maurice O'Sullivan
CPC分类号： H04B10/40 , H04B10/0799 , H04B10/5561 , H04B10/588 , H04B10/616 , H04L1/0042 , H04L7/0075
摘要： A digital instruction is generated regarding one or more electrical-to-optical conversion impairments induced at the transmitter of an optical communication system. The digital instruction may be used by the transmitter to reduce the impairments. Alternatively, or additionally, the digital instruction may be used by the receiver of the optical communication system to compensate for the impairments
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公开(公告)号：US10608746B2
公开(公告)日：2020-03-31
申请号：US16024980
申请日：2018-07-02
申请人： Qunbi Zhuge , Kevin Farley , Kim B. Roberts , Maurice O'Sullivan
发明人： Qunbi Zhuge , Kevin Farley , Kim B. Roberts , Maurice O'Sullivan
IPC分类号： H04B10/06 , H04B10/40 , H04B10/079 , H04B10/556 , H04B10/588 , H04B10/61 , H04L1/00 , H04L7/00
摘要： A digital instruction is generated regarding one or more electrical-to-optical conversion impairments induced at the transmitter of an optical communication system. The digital instruction may be used by the transmitter to reduce the impairments. Alternatively, or additionally, the digital instruction may be used by the receiver of the optical communication system to compensate for the impairments.
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