利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

23 条记录 (耗时 0.019 秒)

    Side band pilot tone for digital signal processing in polarization multiplexed coherent optical communication system
    1.
    发明授权
    Side band pilot tone for digital signal processing in polarization multiplexed coherent optical communication system 有权
    用于偏振复用相干光通信系统中数字信号处理的边带导频

    公开(公告)号：US08340534B2

    公开(公告)日：2012-12-25

    申请号：US12847749

    申请日：2010-07-30

    申请人： Zhuhong Zhang ,  Chuandong Li ,  Fei Zhu ,  Yusheng Bai

    发明人： Zhuhong Zhang ,  Chuandong Li ,  Fei Zhu ,  Yusheng Bai

    IPC分类号： H04B10/06

    CPC分类号： H04J14/06 ,  H04J14/002

    摘要： A method comprising generating a plurality of first symbols that correspond to a side band pilot tone (SBPT) signal for a plurality of data streams, mapping the first symbols into a plurality of second symbols that correspond to a plurality of signal components of the polarization multiplexed (PM) optical signal, and transmitting the second symbols in a plurality of data blocks of a PM optical signal. An apparatus comprising at least one processor coupled to a memory and configured to obtain a data block that comprises a plurality of SBPTs in a received PM optical signal, estimate a set of values for a carrier frequency and a polarization state, update a tap weight of a master equalizer based on the estimated set of values, and update a plurality of slave equalizers based on the updated tap weight of the master equalizer.

    摘要翻译： 一种方法，包括生成对应于多个数据流的边带导频（SBPT）信号的多个第一符号，将第一符号映射成与偏振复用的多个信号分量相对应的多个第二符号 （PM）光信号，并且在PM光信号的多个数据块中发送第二符号。 一种装置，包括耦合到存储器并被配置为获得包含接收的PM光信号中的多个SBPT的数据块的至少一个处理器，估计载波频率和极化状态的一组值，更新一个 基于估计的值集合的主均衡器，并且基于主均衡器的更新抽头权重来更新多个从均衡器。

    Side Band Pilot Tone for Digital Signal Processing in Polarization Multiplexed Coherent Optical Communication System
    4.
    发明申请
    Side Band Pilot Tone for Digital Signal Processing in Polarization Multiplexed Coherent Optical Communication System 有权
    用于极化复用相干光通信系统中数字信号处理的边带导频

    公开(公告)号：US20110033184A1

    公开(公告)日：2011-02-10

    申请号：US12847749

    申请日：2010-07-30

    申请人： Zhuhong Zhang ,  Chuandong Li ,  Fei Zhu ,  Yusheng Bai

    发明人： Zhuhong Zhang ,  Chuandong Li ,  Fei Zhu ,  Yusheng Bai

    IPC分类号： H04J14/06

    CPC分类号： H04J14/06 ,  H04J14/002

    摘要： A method comprising generating a plurality of first symbols that correspond to a side band pilot tone (SBPT) signal for a plurality of data streams, mapping the first symbols into a plurality of second symbols that correspond to a plurality of signal components of the polarization multiplexed (PM) optical signal, and transmitting the second symbols in a plurality of data blocks of a PM optical signal. An apparatus comprising at least one processor coupled to a memory and configured to obtain a data block that comprises a plurality of SBPTs in a received PM optical signal, estimate a set of values for a carrier frequency and a polarization state, update a tap weight of a master equalizer based on the estimated set of values, and update a plurality of slave equalizers based on the updated tap weight of the master equalizer.

    摘要翻译： 一种方法，包括生成对应于多个数据流的边带导频（SBPT）信号的多个第一符号，将第一符号映射成与偏振复用的多个信号分量相对应的多个第二符号 （PM）光信号，并且在PM光信号的多个数据块中发送第二符号。 一种装置，包括耦合到存储器并被配置为获得包含接收的PM光信号中的多个SBPT的数据块的至少一个处理器，估计载波频率和极化状态的一组值，更新一个 基于估计的值集合的主均衡器，并且基于主均衡器的更新抽头权重来更新多个从均衡器。

    Method and apparatus of using joint timing recovery for a coherent optical system
    5.
    发明授权
    Method and apparatus of using joint timing recovery for a coherent optical system 有权
    用于相干光学系统的联合定时恢复的方法和装置

    公开(公告)号：US08737847B2

    公开(公告)日：2014-05-27

    申请号：US13423959

    申请日：2012-03-19

    申请人： Chuandong Li ,  Zhuhong Zhang ,  Fei Zhu ,  Yu Sheng Bai

    发明人： Chuandong Li ,  Zhuhong Zhang ,  Fei Zhu ,  Yu Sheng Bai

    IPC分类号： H04B10/06

    CPC分类号： H04B10/6162

    摘要： An apparatus and method for performing joint equalization and timing recovery in coherent optical systems. The method includes equalizing signals to generate compensated polarization signals, wherein timing error in a distorted optical signal is calculated based on one of the compensated polarization signals. The method further includes performing resampling polarization signals to correct timing offset in an optical signal based on the calculated timing error. The calculated timing error may also be used to adaptively control one or more operating parameters of an external device.

    摘要翻译： 用于在相干光学系统中执行联合均衡和定时恢复的装置和方法。 该方法包括均衡信号以产生补偿的偏振信号，其中基于补偿的偏振信号中的一个来计算失真的光信号中的定时误差。 该方法还包括基于所计算的定时误差来执行重采样偏振信号以校正光信号中的定时偏移。 所计算的定时误差也可用于自适应地控制外部设备的一个或多个操作参数。

    METHOD WITH IMPROVED PHASE ROBUSTNESS IN COHERENT DETECTED OPTICAL SYSTEM
    9.
    发明申请
    METHOD WITH IMPROVED PHASE ROBUSTNESS IN COHERENT DETECTED OPTICAL SYSTEM 有权
    在相干检测光学系统中改进相位稳定性的方法

    公开(公告)号：US20130315609A1

    公开(公告)日：2013-11-28

    申请号：US13480230

    申请日：2012-05-24

    申请人： Chuandong Li ,  Yuanjie Chen ,  Zhuhong Zhang ,  Yi Cai ,  Fei Zhu

    发明人： Chuandong Li ,  Yuanjie Chen ,  Zhuhong Zhang ,  Yi Cai ,  Fei Zhu

    IPC分类号： H04B10/06

    CPC分类号： H04B10/613 ,  H04B10/6164

    摘要： An optical signal receiver tracks local oscillator frequency offset (LOFO) and compensates for the phase distortion introduced in the received signals as a result of utilizing the local oscillator within a coherent detection scheme. This phase distortion is basically a constant phase rotation caused by the LOFO and implementation of the receiver using coherent detection and a digital interferometer instead of a conventional (yet complex) carrier phase estimation or recovery scheme. With an optical receiver implemented in this manner, the requirement of using a precise local oscillator laser with low frequency offset is less important.

    摘要翻译： 光信号接收器跟踪本地振荡器频率偏移（LOFO），并且通过在相干检测方案中利用本地振荡器来补偿在接收信号中引入的相位失真。 该相位失真基本上是由LOFO引起的恒定相位旋转和使用相干检测的接收机的实现以及数字干涉仪而不是常规（但复杂的）载波相位估计或恢复方案。 通过以这种方式实现的光接收机，使用具有低频偏移的精确本地振荡器激光器的要求不那么重要。