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39 条记录 (耗时 0.021 秒)

    Digital circuit for slope filtering
    23.
    发明公开
    Digital circuit for slope filtering 审中-公开
    Digitale Schaltung zur Steigungsfilterung

    公开(公告)号：EP2854043A1

    公开(公告)日：2015-04-01

    申请号：EP13306313.1

    申请日：2013-09-26

    申请人： ALCATEL LUCENT

    发明人： Costantini, Carlo ,  Gavioli, Giancarlo

    IPC分类号： G06F17/10 ,  G06F17/18

    CPC分类号： G06F17/10 ,  G06F17/18 ,  H03H17/04 ,  H03H17/045

    摘要： It is disclosed a digital circuit for implementing a slope filtering on a sequence of data samples equally spaced in time, said slope filtering comprising calculating a linear combination: β = ∑ k = 0 N - 1 β k ⁢ y k
    of N consecutive data samples y0, y1, ... yN-1. The digital circuit has a transfer function H(z) equal to a Z-transform of the above linear combination, divided by (1-z -1 ) 2 and multiplied by (1-z -1 ) 2 . The transfer function H(z) in particular has a denominator (1-z -1 ) 2 implemented by two cascaded integrators of the circuit, and a nominator that comprises a single multiplication by (N-1) implemented by a corresponding multiplier of the circuit. No other multipliers are required. The number of multipliers of the circuit is accordingly minimized and is independent of the number N. This makes the circuit simple, inexpensive and particularly suitable for noisy applications which require high values of N.

    摘要翻译： 公开了一种用于对时间上等距间隔的数据采样序列实现斜率滤波的数字电路，所述斜率滤波包括计算线性组合：N个连续数据的= k = 0 N-1 2 k ¢ 样本y0，y1，... yN-1。 数字电路具有等于上述线性组合的Z变换的除以（1-z-1）2并乘以（1-z-1）2的传递函数H（z）。 传递函数H（z）特别地具有由电路的两个级联积分器实现的分母（1-z-1）2，并且包括由相应的乘法器实现的（N-1）的单次乘法的提名者 电路。 不需要其他乘法器。 因此，电路的乘法器的数量被最小化并且与数字N无关。这使得电路简单，便宜并且特别适合于需要高N值的噪声应用。

    Iterative error decoder with cascaded decoding blocks and a feedback decoding block
    24.
    发明公开
    Iterative error decoder with cascaded decoding blocks and a feedback decoding block 审中-公开
    Iterativer Fehlekorrekturdecodierer mit verkettetenDekodierblöckenund einemrückgekoppeltenDekodierblock

    公开(公告)号：EP2819310A1

    公开(公告)日：2014-12-31

    申请号：EP13305884.2

    申请日：2013-06-26

    申请人： ALCATEL LUCENT

    发明人： Razzetti, Luca Gabriele ,  Costantini, Carlo ,  Pepe, Marianna ,  Gavioli, Giancarlo

    IPC分类号： H03M13/11

    CPC分类号： H03M13/1145 ,  H03M13/1128

    摘要： It is disclosed a forward error correction decoder for a network element of a communication network. The decoder comprises a first decoding stage configured to receive an input data block, the first decoding stage comprising a plurality of decoding units connected in cascade, each of said decoding units being configured to perform one iteration of a forward error correction decoding procedure on said input data block. The first decoding stage is further configured to output an output data block. The decodes also comprises a second decoding stage comprising a further decoding unit configured to: receive the output data block in case the output data block is not correct; and perform a number of further iterations of the forward error correction decoding procedure on the output data block until a termination condition is fulfilled, the number of further iterations being equal to or higher than 1.

    摘要翻译： 公开了一种用于通信网络的网元的前向纠错解码器。 解码器包括被配置为接收输入数据块的第一解码级，第一解码级包括级联连接的多个解码单元，每个解码单元被配置为对所述输入执行前向纠错解码过程的一次迭代 数据块。 第一解码级还被配置为输出输出数据块。 解码还包括第二解码级，其包括另外的解码单元，其被配置为：在输出数据块不正确的情况下接收输出数据块; 并且对输出数据块执行前向纠错解码过程的多个进一步迭代，直到满足终止条件，进一步迭代次数等于或高于1。

    Method of decoding a differentially encoded phase modulated optical data signal
    25.
    发明公开
    Method of decoding a differentially encoded phase modulated optical data signal 有权
    一种用于不同编码的，相位调制的光数据信号进行解码的方法

    公开(公告)号：EP2538596A1

    公开(公告)日：2012-12-26

    申请号：EP11305776.4

    申请日：2011-06-21

    申请人： Alcatel Lucent

    发明人： Razzetti, Luca ,  Costantini, Carlo ,  Pepe, Marianna ,  Leven, Andreas ,  ten Brink, Stephan ,  Schmalen, Laurent

    IPC分类号： H04L1/00

    CPC分类号： H04L1/0045 ,  H04B10/6165 ,  H04L1/0047 ,  H04L1/005 ,  H04L1/0054 ,  H04L1/0057

    摘要： Proposed is a method of decoding a differentially encoded PSK modulated optical data signal carrying FEC encoded data values. The optical signal is corrected by an estimated phase offset. From the corrected signal, respective likelihood values for the FEC encoded data values are derived, using an estimation algorithm which accounts for a differential encoding rule used for differentially encoding the optical signal. The derived likelihood values are limited to a predetermined range of values. From the limited likelihood values, FEC decoded data values are derived, using an algorithm which accounts for a FEC encoding rule used for FEC encoding the FEC encoded data values.

    摘要翻译： 提出了一种差分编码PSK调制携带FEC编码数据值的光数据信号进行解码的方法。 的光信号通过在估计的相位偏移校正。 从校正的信号，为对FEC编码后的数据值respectivement似然值被导出，使用估计算法占用于差分编码的光信号的差分编码规则的。 的可能性得到的值被限制到预定的值的范围。 从有限的似然值，FEC解码值被导出的数据，使用在算法占用于FEC编码的FEC编码后的数据值的FEC编码规则。

    Correction of errors in a codeword
    27.
    发明公开
    Correction of errors in a codeword 有权
    肯尼克斯特的Korrektur von Fehlern

    公开(公告)号：EP2285003A1

    公开(公告)日：2011-02-16

    申请号：EP09305751.1

    申请日：2009-08-12

    申请人： Alcatel Lucent

    发明人： Costantini, Carlo ,  Cattaneo, Davide ,  Gemelli, Riccardo ,  Ronchetti, Luigi

    IPC分类号： H03M13/09 ,  G06F17/30

    摘要： It is disclosed a method for correcting one or more errors in a codeword received at a network element of a communication network. The method comprises, before receiving the codeword, storing at the network element an error correction table comprising N correction information allowing to correct N correctable error patterns possibly affecting the codeword. The method further comprises, upon reception of the codeword at the network element: calculating a syndrome of the codeword; calculating an address applying an hash function to the calculated syndrome; using the calculated address for selecting in the error correction table one of the N correction information; and using the selected correction information for correcting one or more errors affecting the codeword.

    摘要翻译： 公开了一种用于校正在通信网络的网络单元处接收的码字中的一个或多个错误的方法。 所述方法包括：在接收到所述码字之前，在所述网络单元处存储包括N个校正信息的纠错表，所述纠错表允许修正可能影响所述码字的N个可校正错误模式。 所述方法还包括：在所述网元处接收到所述码字;计算所述码字的综合征; 计算应用散列函数到所计算的综合征的地址; 使用所计算的地址在所述纠错表中选择所述N个校正信息之一; 以及使用所选择的校正信息来校正影响码字的一个或多个错误。

    Adjustment scheme for a polarization demultiplexer in an optical dual-polarization BPSK receiver
    28.
    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。