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    Reconstruction and restoration of an optical signal field
    1.
    发明专利
    Reconstruction and restoration of an optical signal field 未知

    公开(公告)号：AU2007297667A1

    公开(公告)日：2008-03-27

    申请号：AU2007297667

    申请日：2007-09-20

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： WEI XING ,  LIU XIANG

    IPC: H04B10/158

    Abstract: A digital version of both amplitude and phase of a received optical is developed by employing direct differential detection in conjunction with digital signal processing. The signal is split into three copies. An intensity profile is conventionally obtained using one of the copies. Phase information is obtained by supplying each remaining copy to a respective one of a pair of optical delay interferometers that have orthogonal phase offsets, followed by respective balanced intensity detectors. The output of each of the balanced intensity detectors, and the intensity profile, are each converted to respective digital representations. Signal processing is used to develop the phase information from the digital representations of the output of the balanced intensity detector outputs.

    RATE-ADAPTIVE FORWARD ERROR CORRECTION FOR OPTICAL TRANSPORT SYSTEMS
    3.
    发明申请
    RATE-ADAPTIVE FORWARD ERROR CORRECTION FOR OPTICAL TRANSPORT SYSTEMS 审中-公开
    光传输系统的自适应前向纠错校正

    公开(公告)号：WO2009020529A3

    公开(公告)日：2009-04-02

    申请号：PCT/US2008009114

    申请日：2008-07-28

    Applicant: LUCENT TECHNOLOGIES INC ,  DE LIND VAN WIJNGAARDEN ADRIAA ,  GILES RANDY CLINTON ,  KOROTKY STEVEN K ,  LIU XIANG

    Inventor： DE LIND VAN WIJNGAARDEN ADRIAAN J ,  GILES RANDY CLINTON ,  KOROTKY STEVEN K ,  LIU XIANG

    IPC: H04L1/00 ,  H04B10/00

    CPC classification number: H04L1/0009 ,  H04L1/0015

    Abstract: An optical transport system (OTS) having a plurality of optical transponders (OTs) connected via one or more optical links and adapted to communicate with one another using respective rate-adaptive forward-error-correction (FEC) codes. In one embodiment, the OTS has a rate control unit (RCU) adapted to configure the OTs to dynamically adjust the rates of the FEC codes (310) based on an estimated performance margin (306) for each link between two respective communicating OTs to optimize the overall capacity of the OTS while maintaining an adequate, but not excessive, overall system margin.

    Abstract translation: 具有经由一个或多个光链路连接并且适于使用相应的速率自适应前向纠错（FEC）码相互通信的多个光转发器（OT）的光传输系统（OTS）。 在一个实施例中，OTS具有速率控制单元（RCU），该速率控制单元（RCU）适于基于针对两个相应通信OT之间的每个链路的估计性能裕度（306）来配置OT来动态地调整FEC码（310）的速率，以优化 OTS的总体能力，同时保持足够但不是过度的整体系统利润。

    Reconstruction and restoration of an optical signal field
    5.
    发明专利
    Reconstruction and restoration of an optical signal field 未知

    公开(公告)号：AU2007297667B2

    公开(公告)日：2010-08-05

    申请号：AU2007297667

    申请日：2007-09-20

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： WEI XING ,  LIU XIANG

    IPC: H04B10/158

    Abstract: A digital version of both amplitude and phase of a received optical is developed by employing direct differential detection in conjunction with digital signal processing. The signal is split into three copies. An intensity profile is conventionally obtained using one of the copies. Phase information is obtained by supplying each remaining copy to a respective one of a pair of optical delay interferometers that have orthogonal phase offsets, followed by respective balanced intensity detectors. The output of each of the balanced intensity detectors, and the intensity profile, are each converted to respective digital representations. Signal processing is used to develop the phase information from the digital representations of the output of the balanced intensity detector outputs.

    6.
    发明专利
    未知

    公开(公告)号：AT465563T

    公开(公告)日：2010-05-15

    申请号：AT07796793

    申请日：2007-07-12

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： GILES RANDY ,  LIU XIANG

    IPC: H04B10/155 ,  H04B10/43 ,  H04L27/32

    Abstract: Methods and apparatus are described for generating and receiving amplitude and differential-phase encoded signals in which the number of phase states at a given amplitude level is always less than or equal to that at a higher amplitude level and at least two amplitude levels have different numbers of phase states.

    8.
    发明专利
    未知

    公开(公告)号：DE602004006946D1

    公开(公告)日：2007-07-26

    申请号：DE602004006946

    申请日：2004-11-22

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： LIU XIANG ,  MOELLER LOTHAR B E J ,  WEI XING ,  XIE CHONGJIN

    IPC: H04L25/49 ,  H04L25/497 ,  H03M5/18 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/142 ,  H04B10/152 ,  H04B10/155 ,  H04B10/158 ,  H04B10/26 ,  H04B10/43 ,  H04L7/04 ,  H04L25/06

    Abstract: An optical receiver adapted to process an optical duobinary signal received over a transmission link in an optical communication system. In one embodiment, the receiver has an optical-to-electrical signal converter coupled to a decoder. The decoder processes an electrical signal generated by the converter to generate a bit sequence corresponding to the optical signal. To generate a bit value, the decoder integrates the electrical signal using a sampling window and compares the integration result with a decision threshold value. In one configuration, the width of the sampling window and the decision threshold value are selected based on the eye diagram and noise distribution function, respectively, corresponding to the optical signal. Advantageously, embodiments of the present invention improve overall back-to-back (i.e., source-to-destination) system performance, e.g., by improving dispersion tolerance and/or reducing optical power corresponding to a selected bit error rate value.

    9.
    发明专利
    未知

    公开(公告)号：DE602005000276T2

    公开(公告)日：2007-05-31

    申请号：DE602005000276

    申请日：2005-06-21

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： GILL DOUGLAS M ,  LIU XIANG

    IPC: H04B10/155 ,  G02F1/225

    Abstract: An optical modulator is overdriven to increase its nonlinearity and therefore improve its response as it pertains to differential phase shift keyed (DPSK) transmission and a method of operating the same. In one embodiment, the MZM includes an MZM drive circuit coupled to the electrodes and configured to deliver to the electrode a DPSK drive signal bearing digital data and having a voltage that exceeds a normal drive voltage of the MZM by at least about 20%.

    10.
    发明专利
    未知

    公开(公告)号：DE602004001300T2

    公开(公告)日：2007-05-31

    申请号：DE602004001300

    申请日：2004-07-28

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： DE LIND VAN WIJNGAARDEN ADRIAA ,  LIU XIANG ,  XIE CHONGJIN

    IPC: H04B10/02 ,  H04B10/18 ,  G02B6/27 ,  H04J14/00 ,  H04J14/02

    Abstract: A system and method for multi-channel PMD/PDL/PDG mitigation, the system including polarization scramblers adapted to vary the state of polarization of an optical signal propagated through the system to effectively vary the polarization mode dispersion experienced by the signal during each burst-error-correcting-period of the forward error correction used in the system.

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