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    Optical transmission system using optical signal processing in terminals for improved system performance
    4.
    发明授权
    Optical transmission system using optical signal processing in terminals for improved system performance 失效
    光端机传输系统采用光信号处理，提高系统性能

    公开(公告)号：US07336908B2

    公开(公告)日：2008-02-26

    申请号：US11530270

    申请日：2006-09-08

    申请人： Neal S. Bergano ,  Alexei N. Pilipetskii ,  M. Imran Hayee

    发明人： Neal S. Bergano ,  Alexei N. Pilipetskii ,  M. Imran Hayee

    IPC分类号： H04B10/06

    CPC分类号： H04B10/671 ,  H04J14/02 ,  H04J14/06

    摘要： An optical communication system configured to operate with optical signals at lower signal to noise ratios than previously contemplated. The communication system includes a receiver having an optical pre-processor coupled between a demultiplexer and a detector. The optical pre-processor includes either an optical polarization section having a polarization rotator and an optical polarizer, a phase modulation section that includes a phase modulator and a dispersion element and a clock recovery circuit, or an amplitude modulation section that includes an amplitude modulator clock recovery circuit and a spectral shaping filter. A method of communication includes transmitting an optical signal into the system and receiving the signal at a reduced signal-to-noise ratio through a transmission media, demultiplexing the optical transmission signal into a first optical signal, and pre-processing the first optical signal to form a first pre-processed signal by either rotating a polarization of the first optical signal, compressing a pulse in the first optical signal, or modulating an amplitude of a pulse in the first optical signal. The method then detects the first pre-processed signal to form an electrical signal. A reference signal-to-noise ratio is defined as a signal-to-noise ratio of a received signal that would produce a predetermined bit error rate in the electrical signal if the signal-to-noise ratio were to be determined with the pre-processing step omitted. The reduced signal-to-noise ratio is less than the reference signal-to-noise ratio, and a bit error rate in the electrical signal is less than the predetermined bit error rate when the step of transmitting transmits at the reduced signal-to-noise ratio.

    摘要翻译： 光通信系统被配置为以比先前预期的更低的信噪比操作光信号。 通信系统包括具有耦合在解复用器和检测器之间的光学预处理器的接收机。 光学预处理器包括具有偏振旋转器和光偏振器的光偏振部分，包括相位调制器和色散元件的相位调制部分和时钟恢复电路，或包括振幅调制器时钟 恢复电路和频谱整形滤波器。 一种通信方法包括：将光信号发射到系统中，并通过传输介质以降低的信噪比接收信号，将光传输信号解复用为第一光信号，并将第一光信号预处理成 通过旋转第一光信号的偏振，压缩第一光信号中的脉冲或调制第一光信号中的脉冲幅度来形成第一预处理信号。 该方法然后检测第一预处理信号以形成电信号。 参考信噪比被定义为如果信号噪声比要用预编码器确定的，则在电信号中将产生预定误比特率的接收信号的信噪比， 处理步骤省略。 降低的信噪比小于参考信噪比，并且当发送的发送步骤以降低的信号 - 噪声比传输时，电信号中的误码率小于预定的误码率， 噪音比。

    Optical transmission system using optical signal processing in terminals for improved system performance
    5.
    发明授权
    Optical transmission system using optical signal processing in terminals for improved system performance 失效
    光端机传输系统采用光信号处理，提高系统性能

    公开(公告)号：US07203429B2

    公开(公告)日：2007-04-10

    申请号：US09850600

    申请日：2001-05-07

    申请人： Neal S. Bergano ,  Alexei N. Pilipetskii ,  M. Imran Hayee

    发明人： Neal S. Bergano ,  Alexei N. Pilipetskii ,  M. Imran Hayee

    IPC分类号： H04B10/06

    CPC分类号： H04B10/671 ,  H04J14/02 ,  H04J14/06

    摘要： An optical communication system configured to operate with optical signals at lower signal to noise ratios than previously contemplated. The communication system includes a receiver having an optical pre-processor coupled between a demultiplexer and a detector. The optical pre-processor includes either an optical polarization section having a polarization rotator and an optical polarizer, a phase modulation section that includes a phase modulator and a dispersion element and a clock recovery circuit, or an amplitude modulation section that includes an amplitude modulator clock recovery circuit and a spectral shaping filter. A method of communication includes transmitting an optical signal into the system and receiving the signal at a reduced signal-to-noise ratio through a transmission media, demultiplexing the optical transmission signal into a first optical signal, and pre-processing the first optical signal to form a first pre-processed signal by either rotating a polarization of the first optical signal, compressing a pulse in the first optical signal, or modulating an amplitude of a pulse in the first optical signal. The method then detects the first pre-processed signal to form an electrical signal. A reference signal-to-noise ratio is defined as a signal-to-noise ratio of a received signal that would produce a predetermined bit error rate in the electrical signal if the signal-to-noise ratio were to be determined with the pre-processing step omitted. The reduced signal-to-noise ratio is less than the reference signal-to-noise ratio, and a bit error rate in the electrical signal is less than the predetermined bit error rate when the step of transmitting transmits at the reduced signal-to-noise ratio.

    摘要翻译： 光通信系统被配置为以比先前预期的更低的信噪比操作光信号。 通信系统包括具有耦合在解复用器和检测器之间的光学预处理器的接收机。 光学预处理器包括具有偏振旋转器和光偏振器的光偏振部分，包括相位调制器和色散元件的相位调制部分和时钟恢复电路，或包括振幅调制器时钟 恢复电路和频谱整形滤波器。 一种通信方法包括：将光信号发射到系统中，并通过传输介质以降低的信噪比接收信号，将光传输信号解复用为第一光信号，并将第一光信号预处理成 通过旋转第一光信号的偏振，压缩第一光信号中的脉冲或调制第一光信号中的脉冲幅度来形成第一预处理信号。 该方法然后检测第一预处理信号以形成电信号。 参考信噪比被定义为如果信号噪声比要用预编码器确定的，则在电信号中将产生预定误比特率的接收信号的信噪比， 处理步骤省略。 降低的信噪比小于参考信噪比，并且当发送的发送步骤以降低的信号 - 噪声比传输时，电信号中的误码率小于预定的误码率， 噪音比。

    System and method for adjusting soft decision thresholds in a soft-decision error correction system
    6.
    发明授权
    System and method for adjusting soft decision thresholds in a soft-decision error correction system 失效
    用于在软判决纠错系统中调整软决策阈值的系统和方法

    公开(公告)号：US07363553B2

    公开(公告)日：2008-04-22

    申请号：US10972289

    申请日：2004-10-22

    申请人： Yi Cai ,  Alexei N. Pilipetskii ,  Morten Nissov

    发明人： Yi Cai ,  Alexei N. Pilipetskii ,  Morten Nissov

    IPC分类号： H03M13/00

    CPC分类号： H03M13/45

    摘要： The soft decision thresholds in a soft decision forward error correction (FEC) system may be adjusted based on mutual information of a detected signal. In one embodiment, a recursive algorithm may be used to optimize threshold values by maximizing the mutual information. In another embodiment, an adaptive scheme may be used to optimize threshold values based on a pre-knowledge of the noise in the channel. In a further embodiment, an adaptive scheme may be used to optimize threshold values by without pre-knowledge of the noise in the channel.

    摘要翻译： 可以基于检测到的信号的相互信息来调整软判决前向纠错（FEC）系统中的软判决阈值。 在一个实施例中，可以使用递归算法来通过使互信息最大化来优化阈值。 在另一个实施例中，可以使用自适应方案来基于信道中噪声的预先了解来优化阈值。 在另一个实施例中，可以使用自适应方案来通过没有对信道中的噪声的预先知识来优化阈值。

    Detection of Data in Signals with Data Pattern Dependent Signal Distortion
    7.
    发明申请
    Detection of Data in Signals with Data Pattern Dependent Signal Distortion 有权
    用数据模式相关信号失真检测信号中的数据

    公开(公告)号：US20100232809A1

    公开(公告)日：2010-09-16

    申请号：US12718132

    申请日：2010-03-05

    申请人： Yi Cai ,  Morten Nissov ,  Alexei N. Pilipetskii

    发明人： Yi Cai ,  Morten Nissov ,  Alexei N. Pilipetskii

    IPC分类号： H04B10/06 ,  H04L27/00

    CPC分类号： H04J14/02 ,  H04B10/2507 ,  H04B10/697 ,  H04J14/0279

    摘要： A detection system and method may be used to detect data transmitted in a signal with data pattern dependent signal distortion. In general, a detection system and method compares samples of a received signal with stored samples of distorted signals associated with known data patterns and selects the known data patterns that correspond most closely with the samples of the received signal. The detection system and method may thus mitigate the effects of data pattern dependent signal distortion.

    摘要翻译： 可以使用检测系统和方法来检测在具有数据模式相关信号失真的信号中发送的数据。 通常，检测系统和方法将接收信号的样本与已知数据模式相关联的失真信号的存储样本进行比较，并且选择与接收信号的采样最紧密对应的已知数据模式。 因此，检测系统和方法可以减轻数据模式相关信号失真的影响。

    Detection of data in signals with data pattern dependent signal distortion
    8.
    发明授权
    Detection of data in signals with data pattern dependent signal distortion 有权
    检测具有数据模式相关信号失真的信号中的数据

    公开(公告)号：US08401400B2

    公开(公告)日：2013-03-19

    申请号：US12718132

    申请日：2010-03-05

    申请人： Yi Cai ,  Morten Nissov ,  Alexei N. Pilipetskii

    发明人： Yi Cai ,  Morten Nissov ,  Alexei N. Pilipetskii

    IPC分类号： H04B10/06

    CPC分类号： H04J14/02 ,  H04B10/2507 ,  H04B10/697 ,  H04J14/0279

    摘要： A detection system and method may be used to detect data transmitted in a signal with data pattern dependent signal distortion. In general, a detection system and method compares samples of a received signal with stored samples of distorted signals associated with known data patterns and selects the known data patterns that correspond most closely with the samples of the received signal. The detection system and method may thus mitigate the effects of data pattern dependent signal distortion.

    摘要翻译： 可以使用检测系统和方法来检测在具有数据模式相关信号失真的信号中发送的数据。 通常，检测系统和方法将接收信号的样本与已知数据模式相关联的失真信号的存储样本进行比较，并且选择与接收信号的采样最紧密对应的已知数据模式。 因此，检测系统和方法可以减轻数据模式相关信号失真的影响。