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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：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：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：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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8.发明授权Optical modulation schemes having reduced nonlinear optical transmission impairments 有权具有降低的非线性光传输损伤的光调制方案公开(公告)号：US09143238B2
公开(公告)日：2015-09-22
申请号：US13969694
申请日：2013-08-19
申请人： Kim B. Roberts , Maurice O'Sullivan , Mahmoud Taherzadehboroujeni , Shahab Oveis Gharan , Andrew D. Shiner , Michael Andrew Reimer
发明人： Kim B. Roberts , Maurice O'Sullivan , Mahmoud Taherzadehboroujeni , Shahab Oveis Gharan , Andrew D. Shiner , Michael Andrew Reimer
IPC分类号： H04B10/04 , H04B10/00 , H04B10/532 , H04B10/516
CPC分类号： H04B10/532 , H04B10/516
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 signaling interval, and has a second value when averaged across more than one and fewer than 100 signaling 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.
摘要翻译： 一种使用光通信系统的光发射机发送数据信号的方法。 光发射机被配置为在连续的信令间隔中调制光载波以产生光信号。 提供了一种包括多维符号星座的调制方案。 调制方案被设计成使得当从第一信令间隔平均时，从光发送器输出的调制光信号的平均偏振度具有第一值，并且当平均多于一个且少于100个信令时具有第二值 间隔 第二个值小于第一个值的10％。 在运行时间期间，光发送器的编码器编码要作为星座符号发送的数据信号，以及根据符号调制光载波的可用尺寸的光发射机的调制器。
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公开(公告)号：US10419109B1
公开(公告)日：2019-09-17
申请号：US16124479
申请日：2018-09-07
申请人： Shahab Oveis Gharan , Michael Andrew Reimer , Andrew D. Shiner , Hamid Ebrahimzad , Maurice O'Sullivan , Kim B. Roberts
发明人： Shahab Oveis Gharan , Michael Andrew Reimer , Andrew D. Shiner , Hamid Ebrahimzad , Maurice O'Sullivan , Kim B. Roberts
IPC分类号： H04B10/00 , H04B10/079 , H04J14/00 , H04B10/50 , H04B10/66
摘要： An optical transmitter is operable to generate an optical signal by modulating a number N of frequency divisional multiplexing (FDM) subcarriers using transformed digital signals which are determined by applying a pseudo FDM (pFDM) transformation to preliminary digital signals representative of multi-bit symbols. Rather than experiencing the effects of the number N of FDM channels, the optical signal experiences the effects of a different number M of pFDM channels, where M≠N. In some examples, the number M of pFDM channels is less than the number N of FDM channels, and frequency-dependent degradations may be averaged across different symbol streams. In other examples, the number M of pFDM channels is greater than the number N of FDM channels, and different symbol streams may experience different frequency-dependent degradations. An optical receiver is operable to apply an inverse pFDM transformation in order to recover estimates of the multi-bit symbols.
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公开(公告)号：US10389447B1
公开(公告)日：2019-08-20
申请号：US16003736
申请日：2018-06-08
申请人： Amir Khandani , Shahab Oveis Gharan , Michael Andrew Reimer , Maurice O'Sullivan , Kim B. Roberts
发明人： Amir Khandani , Shahab Oveis Gharan , Michael Andrew Reimer , Maurice O'Sullivan , Kim B. Roberts
摘要： A receiver may receive an optical signal over an optical communications channel established between the receiver and a transmitter, the received optical signal comprising a degraded version of a modulated optical signal generated at the transmitter. The receiver may determine received digital signals corresponding to a plurality of first dimensions of the received optical signal, wherein the first dimensions correspond to dimensions of an optical carrier modulated at the transmitter to represent a multi-bit symbol, and wherein the first dimensions are distributed over two or more timeslots. The receiver may determine preliminary digital drive signal estimates using an inverse dimensional transformation and the received digital signals, the preliminary digital drive signal estimates corresponding to a plurality of second dimensions. The receiver may determine an estimate of the multi-bit symbol using the preliminary digital drive signal estimates. The inverse dimensional transformation may average signal degradations in the received digital signals.
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