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    Power adjustment of in-phase and quadrature components at a coherent optical receiver
    3.
    发明公开
    Power adjustment of in-phase and quadrature components at a coherent optical receiver 有权
    一个相干光接收器的同相和正交分量的功率设定

    公开(公告)号：EP2381593A1

    公开(公告)日：2011-10-26

    申请号：EP10305415.1

    申请日：2010-04-21

    申请人： Alcatel Lucent

    发明人： Weisser, Stefan ,  Cucchi, Silvio ,  Constantini, Carlo ,  Kaneda, Noriaki ,  Leven, Andreas

    IPC分类号： H04B10/148 ,  H04B10/158 ,  H03G3/30 ,  H04L27/22

    CPC分类号： H04B10/616 ,  H03G3/3084 ,  H04B10/60 ,  H04B10/613 ,  H04B10/6931 ,  H04L27/2096 ,  H04L27/3809 ,  H04L27/3818

    摘要： It is disclosed an optical coherent receiver for an optical communication network. The optical coherent receiver is configured to receive a modulated optical signal and to process it for generating an in-phase component and a quadrature component. The optical coherent receiver comprises a power adjuster in turn comprising a multiplying unit and a retroactively connected digital circuit. The multiplying unit is configured to multiply the in-phase and quadrature components by in-phase and quadrature gains, respectively, thereby providing power-adjusted in-phase and quadrature components. The digital circuit is configured to compute: a common gain indicative of a sum of the powers of the power-adjusted in-phase and quadrature components; a differential gain indicative of a difference between the powers of the power-adjusted in-phase and quadrature components; and the in-phase and quadrature gains as a product and a ratio, respectively, between the common gain and the differential gain.

    摘要翻译： 它是盘上游离缺失光相干接收机在光通信网络。 光相干接收机被配置成接收调制光信号，并处理它，用于产生同相分量和正交分量。 的光相干接收机依次包括功率调整器，其包括一个乘法单元和追溯连接的数字电路。 乘法单元被配置为通过在同相和正交增益，乘以同相和正交分量分别，从而提供功率调整同相和正交分量。 数字电路被配置为计算：表示所述功率的总和的公共增益经过功率调整的同相和正交分量; 指示的功率之间的差的差分增益经过功率调整的同相和正交分量; 和同相和正交增益作为产品和的比率，分别为通用增益和微分增益之间。

    Parallel digital filter
    7.
    发明公开
    Parallel digital filter 有权
    平行机数字滤波器

    公开(公告)号：EP2381596A1

    公开(公告)日：2011-10-26

    申请号：EP10305420.1

    申请日：2010-04-21

    申请人： Alcatel Lucent

    发明人： Constantini, Carlo ,  Leven, Andreas ,  Cucchi, Silvio ,  Weisser, Stefan ,  Kaneda, Noriaki ,  Rinaldi, Sonia

    IPC分类号： H04B10/148 ,  H03H17/02 ,  H04L27/38

    CPC分类号： H04B10/613 ,  H03H17/026 ,  H04B10/61 ,  H04B10/611 ,  H04L27/223 ,  H04L27/227 ,  H04L27/3818 ,  H04L2027/0036 ,  H04L2027/0069

    摘要： It is disclosed a digital filter configured to receive a sequence of samples, in particular to receive in parallel N samples per clock cycle, and to calculate a sum of L consecutive samples of the sequence. The digital filter comprises an integrating circuit and a differentiating circuit. The integrating circuit calculates two integrals of the sequence, up to the first sample and up to the last sample of the L consecutive samples, respectively. The differentiating circuit calculates the sum as a difference between the two integrals. The integrating circuit comprises: a cumulative sum module calculating a cumulative sum of the last sample and preceding samples received within the current clock cycle; a register storing a delayed integral calculated on samples received before the current clock cycle; and an addition module calculating the integral of the sequence up to the last sample by adding the cumulative sum and the delayed integral.

    摘要翻译： 公开了一种数字滤波器，其被配置为接收采样序列，特别是每个时钟周期并行接收N个采样，并且计算该序列的L个连续采样的和。 数字滤波器包括积分电路和微分电路。 积分电路分别计算序列的两个积分，直到第一个样本和L个连续样本的最后一个样本。 微分电路将该和计算为两个积分之间的差值。 积分电路包括：累积和模块，计算在当前时钟周期内接收到的最后一个样本和先前样本的累积和; 寄存器，用于存储在当前时钟周期之前接收到的样本计算的延迟积分; 以及加法模块，通过加上累积和和延迟积分来计算直到最后一个样本的序列的积分。

    Phase skew compensation at a coherent optical receiver
    8.
    发明公开
    Phase skew compensation at a coherent optical receiver 有权
    相干光接收器处的相位偏移补偿

    公开(公告)号：EP2381595A1

    公开(公告)日：2011-10-26

    申请号：EP10305417.7

    申请日：2010-04-21

    申请人： Alcatel Lucent

    发明人： Leven, Andreas ,  Constantini, Carlo ,  Cucchi, Silvio ,  Weisser, Stefan ,  Kaneda, Noriaki ,  Cenzato, Luca

    IPC分类号： H04B10/148

    CPC分类号： H04B10/61 ,  H04B10/611 ,  H04B10/613 ,  H04B10/6165

    摘要： It is disclosed a coherent optical receiver configured to receive a modulated optical signal and to generate an in-phase component and a quadrature component. The optical coherent receiver comprises a phase skew compensator in turn comprising a first digital circuit and a second digital circuit retroactively connected between an output and a control input of the first digital circuit. The first digital circuit provides a compensated in-phase component as a sum of the in-phase component multiplied by a first gain and the quadrature component multiplied by a second gain, and a compensated quadrature component as a sum of the in-phase component multiplied by a third gain and the quadrature component multiplied by a fourth gain. The second digital circuit computes the first, second, third and fourth gain as functions of an estimated cross-correlation between the compensated in-phase component and the compensated quadrature component.

    摘要翻译： 公开了一种相干光接收机，其被配置为接收调制光信号并且生成同相分量和正交分量。 该光相干接收机包括相位偏移补偿器，该相位偏移补偿器进而包括第一数字电路和第二数字电路，该第二数字电路追溯地连接在第一数字电路的输出端和控制输入端之间。 第一数字电路提供补偿的同相分量，作为同相分量乘以第一增益和正交分量乘以第二增益的总和，补偿正交分量作为同相分量乘以 乘以第三增益并且正交分量乘以第四增益。 第二数字电路计算第一，第二，第三和第四增益作为补偿的同相分量和补偿的正交分量之间的估计的互相关的函数。

    Polarization demultiplexing at a coherent optical receiver
    9.
    发明公开
    Polarization demultiplexing at a coherent optical receiver 有权
    一个相干光接收器的偏振解复用

    公开(公告)号：EP2381594A1

    公开(公告)日：2011-10-26

    申请号：EP10305416.9

    申请日：2010-04-21

    申请人： Alcatel Lucent

    发明人： Cucchi, Silvio ,  Kaneda, Noriaki ,  Weisser, Stefan ,  Constantini, Carlo ,  Leven, Andreas

    IPC分类号： H04B10/148 ,  H04B10/18 ,  H04J14/06

    CPC分类号： H04J14/06 ,  H04B10/2569 ,  H04B10/61 ,  H04B10/6162 ,  H04J14/002

    摘要： It is disclosed a coherent optical receiver for an optical communication network configured to receive a polarization multiplexed optical signal and to process it for generating a first and second received components thereof. Each of the first and second received components comprises a mixing of a first and second polarization components of the originally transmitted signal. The coherent optical receiver comprises a polarization demultiplexer comprising a first, second and third circuit. The first circuit calculates first and second Fourier transforms of the first and second received components. The second circuit multiplies the first and second Fourier transforms by a first and second transfer functions, respectively, adds them thereby providing a demultiplexed Fourier transform and retrieves the first polarization component applying thereto an inverse Fourier transform. The third circuit retroactively updates the first and second transfer functions, according to the retrieved first polarization component and the first and second received components.

    Adjustment scheme for a polarization demultiplexer in an optical dual-polarization BPSK receiver
    10.
    发明公开
    Adjustment scheme for a polarization demultiplexer in an optical dual-polarization BPSK receiver 有权
    在线优化多普勒光电二极管的双极化分解器 - BPSK-Empfänger

    公开(公告)号：EP2251993A1

    公开(公告)日：2010-11-17

    申请号：EP09290345.9

    申请日：2009-05-11

    申请人： Alcatel Lucent

    发明人： Weisser, Stefan ,  Leven, Andreas ,  Kaneda, Noriaki ,  Costantini, Carlo ,  Cucchi, Silvio

    IPC分类号： H04B10/158

    CPC分类号： H04B10/671

    摘要： The invention relates to a method for adjusting a polarization demultiplexer (1-4) in an optical receiver configured to receive a DP-BPSK signal having two BPSK modulated signal components in different polarizations. The polarization demultiplexer (1-4) outputs a first output signal component (z 1 ) and a second output signal component (z 2 ). The method adjusts the polarization demultiplexer (1-4) based on an error function associated to the first output signal component (z 1 ) and/or an error function associated to the second output signal component (z 2 ). Such an error function associated to an output signal component (z 1 , z 2 ) comprises a constant modulus error contribution indicating a deviation of the respective output signal component (z 1 , z 2 ) from a circle around the root of the complex plane. In addition to the constant modulus error contribution, such an error function associated to an output signal component (z 1 , z 2 ) comprises a constellation error contribution indicating a deviation of the constellation of the respective output signal component (z 1 , z 2 ) from a binary constellation, i.e. a constellation error contribution penalizing the deviation of the recovered constellation from a binary constellation.

    摘要翻译： 本发明涉及一种用于调整光接收器中的偏振解复用器（1-4）的方法，该光接收机被配置为接收具有不同偏振度的两个BPSK调制信号分量的DP-BPSK信号。 偏振解复用器（1-4）输出第一输出信号分量（z 1）和第二输出信号分量（z 2）。 该方法基于与第一输出信号分量（z 1）相关联的误差函数和/或与第二输出信号分量（z 2）相关联的误差函数来调整偏振解复用器（1-4）。 与输出信号分量（z 1，z 2）相关联的这种误差函数包括指示相应输出信号分量（z 1，z 2）与复平面根部周围的圆的偏差的恒模误差贡献。 除了恒模误差贡献之外，与输出信号分量（z 1，z 2）相关联的这种误差函数包括指示相应输出信号分量（z 1，z 2）的星座偏差的星座误差贡献， 从二进制星座，即星座误差贡献惩罚从二进制星座恢复星座的偏差。