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47 条记录 (耗时 0.022 秒)

    Fast estimation of chromatic dispersion
    41.
    发明授权
    Fast estimation of chromatic dispersion 有权

    公开(公告)号：US10819432B1

    公开(公告)日：2020-10-27

    申请号：US16687521

    申请日：2019-11-18

    申请人： Shahab Oveis Gharan ,  Lukas Jakober

    发明人： Shahab Oveis Gharan ,  Lukas Jakober

    IPC分类号： H04B10/2513 ,  H04B10/079 ,  H04B10/61 ,  H04B10/60 ,  H04B10/2507 ,  H04B10/25 ,  H04B10/50

    摘要： A receiver is configured to calculate a representation of a received signal conveying symbols at a frequency fS, the representation comprising non-zero components at frequencies of magnitudes exceeding fS/2. The receiver calculates a first term comprising a function of a phase difference between the representation at a first pair of frequencies separated by a gap Δ and comprised within a first band of width 2δ centered at fS/2, and a second term comprising a function of a phase difference between the representation at a second pair of frequencies separated by the gap Δ and comprised within a second band of width 2δ centered at −fS/2, wherein Δ

    Method and system for nonlinear interference mitigation
    42.
    发明授权
    Method and system for nonlinear interference mitigation 有权

    公开(公告)号：US10270537B2

    公开(公告)日：2019-04-23

    申请号：US15707476

    申请日：2017-09-18

    申请人： Qunbi Zhuge ,  Michael Andrew Reimer ,  Shahab Oveis Gharan ,  Maurice Stephen O'Sullivan

    发明人： Qunbi Zhuge ,  Michael Andrew Reimer ,  Shahab Oveis Gharan ,  Maurice Stephen O'Sullivan

    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.

    Modulation formats with fractional spectral efficiency
    45.
    发明授权
    Modulation formats with fractional spectral efficiency 有权

    公开(公告)号：US11277206B1

    公开(公告)日：2022-03-15

    申请号：US17018495

    申请日：2020-09-11

    申请人： Shahab Oveis Gharan ,  Michael Andrew Reimer ,  James St. Leger Harley

    发明人： Shahab Oveis Gharan ,  Michael Andrew Reimer ,  James St. Leger Harley

    IPC分类号： H04B10/00 ,  H04B10/61 ,  H04B10/516 ,  H04L27/36 ,  H04L27/34 ,  H04B10/532

    摘要： A transmitter maps an N-bit sequence to a point selected from a four-dimensional (4D) constellation consisting of 2N points which form a subset of a Cartesian product of first and second two-dimensional (2D) constellations, the first constellation consisting of M1 points divided into first, second, and third points, and the second constellation consisting of M2 points divided into fourth, fifth, and sixth points, wherein M1, M2≥5, and wherein log2(M1×M2)>N. The subset includes any 4D point that is generated by combining any one of the M1 points and any one of the fourth points; includes any 4D point that is generated by combining any one of the first points and any one of M2 points; and excludes any 4D point that is generated by combining any third point and any sixth point. An optical signal representing the selected point is transmitted to a receiver.

    NONLINEAR TOLERANT OPTICAL MODULATION FORMATS AT HIGH SPECTRAL EFFICIENCY
    47.
    发明申请
    NONLINEAR TOLERANT OPTICAL MODULATION FORMATS AT HIGH SPECTRAL EFFICIENCY 有权
    非线性宽光调制格式在高光谱效率下

    公开(公告)号：US20160373190A1

    公开(公告)日：2016-12-22

    申请号：US14744395

    申请日：2015-06-19

    申请人： Michael Andrew Reimer ,  Shahab Oveis Gharan ,  Andrew D. Shiner ,  Maurice O'Sullivan

    发明人： Michael Andrew Reimer ,  Shahab Oveis Gharan ,  Andrew D. Shiner ,  Maurice O'Sullivan

    IPC分类号： H04B10/556 ,  H04B10/69

    CPC分类号： H04B10/5561 ,  H04B10/2507 ,  H04B10/516 ,  H04B10/5161 ,  H04B10/532 ,  H04B10/612 ,  H04B10/614 ,  H04B10/69 ,  H04L27/34 ,  H04L27/3405

    摘要： Techniques for transmitting a data signal through an optical communications system. An encoder is configured to encode the data signal to generate symbols to be modulated onto an optical carrier. Each symbol encodes multiple bits of data and includes a first portion selected from a first constellation and a second portion selected from a second constellation. The first and second constellations have respective different average amplitudes. Each of the first and second constellations have a cardinality of at least two and the cardinality of the first constellation is greater than the cardinality of the second constellation. A modulator is configured to modulate a first frame of the optical signal using the first portion and modulate a second frame of the optical signal using the second portion. A selection of one frame of the optical signal to be used as the first frame encodes at least I bit of data.

    摘要翻译： 用于通过光通信系统发送数据信号的技术。 编码器被配置为对数据信号进行编码，以生成要调制到光载波上的符号。 每个符号对多个数据位进行编码，并且包括从第一星座选择的第一部分和从第二星座选择的第二部分。 第一和第二星座具有不同的平均振幅。 第一和第二星座中的每一个具有至少两个的基数，并且第一星座的基数大于第二星座的基数。 调制器被配置为使用第一部分来调制光信号的第一帧，并且使用第二部分调制光信号的第二帧。 要用作第一帧的光信号的一帧的选择至少编码I位的数据。