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12 条记录 (耗时 0.013 秒)

    Power adjustment of in-phase and quadrature components at a coherent optical receiver
    1.
    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。

    Update of a cumulative residence time of a packet in a packet-switched communication network
    3.
    发明公开
    Update of a cumulative residence time of a packet in a packet-switched communication network 有权
    更新包的累积停留时间在分组交换通信网络

    公开(公告)号：EP2381622A1

    公开(公告)日：2011-10-26

    申请号：EP10305432.6

    申请日：2010-04-23

    申请人： Alcatel Lucent

    发明人： Ronchetti, Luigi ,  Gemelli, Riccardo ,  Cazzaniga, Giorgio ,  Constantini, Carlo

    IPC分类号： H04L12/26

    CPC分类号： H04L43/106 ,  H04J3/0682 ,  H04J3/0697 ,  H04L43/0858

    摘要： It is disclosed a method for updating a cumulative residence time of a synchronization packet received at a node of a packet-switched communication network. The cumulative residence time is equal to a cumulative sum of residence times of the packet at nodes interposed between a further node which has generated the packet and the node. The node comprises an ingress circuit and an egress circuit. The method comprises: receiving the packet at the egress circuit from the ingress circuit; at a timestamp generator of the egress circuit, generating a timestamp; at the egress circuit, calculating a virtual timestamp based on the timestamp and on an estimated variable delay that will be undergone by the packet due to buffering in a buffer located downstream the timestamp generator; and, at the egress circuit, using the virtual timestamp for updating the cumulative residence time, before transmitting the packet to a still further node.

    摘要翻译： 它是游离缺失光盘的方法，用于更新在分组交换通信网络的节点接收到的同步分组的累积停留时间。 累计的停留时间是在其中已产生的分组和节点A此外节点之间的节点等于所述分组的滞留时间的累积总和。 节点入口电路包括和到出口电路。 该方法包括：接收来自入口电路出口电路的分组; 在出口电路的时间标记发生器，产生一个时间标记; 在出口电路，基于所述时间戳和上thatwill由包由于位于下游的时间戳生成器的缓冲器的缓冲经历估计可变延迟的虚拟时间戳; 并且，在出口电路，使用用于更新累积的停留时间，该分组传送到一个安静的另外节点之前的虚拟时间戳。

    Flow control mechanism for data transmission links
    4.
    发明公开
    Flow control mechanism for data transmission links 有权
    DurchflusssteuermismismusfürDatenübertragungsverbindungen

    公开(公告)号：EP2278757A1

    公开(公告)日：2011-01-26

    申请号：EP09305625.7

    申请日：2009-06-30

    申请人： Alcatel Lucent

    发明人： Gehrke, Gerhard ,  Brachmann, Markus ,  Constantini, Carlo ,  Corradini, Maurizio

    IPC分类号： H04L12/56

    CPC分类号： H04L47/30 ,  H04L47/10 ,  H04L47/17 ,  H04L47/266 ,  H04L47/283 ,  H04L49/101 ,  H04L49/351 ,  H04L49/506 ,  H04L49/90

    摘要： In order to allow loss-less packet data transmission using a flow control mechanism requiring less buffer space at the receiver (13), a method and related apparatus are provided for adjusting a data rate of a packet data stream between a transmitter (11) and the receiver (13) using a flow control mechanism. The receiver (13) receives the packet data stream and buffers it in a buffer memory (133), which is drained at a substantially constant transmission rate. One or more backpressure requests are sent from the receiver (13) bock to the transmitter (11). Backpressure requests contain a backpressure value which indicates a waiting time for the transmitter (11) to to suspend transmission of further data packets. This backpressure value contains a static backpressure component initially determined to match a nominal rate of the packet data stream and the transmission rate, and a dynamic backpressure component dynamically determined from the fill state of the buffer memory (133).

    摘要翻译： 为了允许使用在接收机（13）处需要更少缓冲空间的流控制机构进行无损包分组数据传输，提供了一种方法和相关装置，用于调整发射机（11）和（11）之间的分组数据流的数据速率 接收器（13）使用流量控制机构。 接收器（13）接收分组数据流并将其缓冲在缓冲存储器（133）中，该缓冲存储器以基本恒定的传输速率排出。 一个或多个背压请求从接收器（13）发送到发送器（11）。 背压请求包含背压值，其指示发射机（11）暂停其他数据分组的传输的等待时间。 该背压值包含最初确定为匹配分组数据流的标称速率和传输速率的静态背压分量以及从缓冲存储器（133）的填充状态动态确定的动态背压分量。

    Parallel digital filter
    5.
    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
    6.
    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
    7.
    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.