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96 条记录 (耗时 0.025 秒)

    Polarization Switching for Optical Fiber Communications
    72.
    发明申请
    Polarization Switching for Optical Fiber Communications 有权
    光纤通信的极化切换

    公开(公告)号：US20130089327A1

    公开(公告)日：2013-04-11

    申请号：US13649161

    申请日：2012-10-11

    申请人： NEC Laboratories America, Inc. ,  NEC Corporation

    发明人： Shaoliang Zhang ,  Lei Xu ,  Junqiang Hu ,  Fatih Yaman ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

    IPC分类号： H04J14/06 ,  H04J14/08

    CPC分类号： H04B10/5055 ,  H04B10/5561 ,  H04J14/06

    摘要： A method implemented in a transmission apparatus used in an optical fiber communications system for a polarization switched differential quaternary phase-shift keying (DQPSK) signal is disclosed. The method comprises splitting data into two or more data streams, inputting said two or more data streams to 1-bit DQPSK precoders to perform 1-bit DQPSK precoding, and multiplexing inphase outputs of the 1-bit DQPSK precoders to generate a first output; and multiplexing quadrature outputs of the 1-bit DQPSK precoders to generate a second output. Other methods, apparatuses, and systems also are disclosed.

    摘要翻译： 公开了一种在用于偏振切换差分四相移键控（DQPSK）信号的光纤通信系统中使用的发送装置中实现的方法。 该方法包括将数据分成两个或更多个数据流，将所述两个或多个数据流输入到1比特DQPSK预编码器以执行1比特DQPSK预编码，以及复用1比特DQPSK预编码器的同相输出以产生第一输出; 以及复用1位DQPSK预编码器的正交输出以产生第二输出。 还公开了其它方法，装置和系统。

    Probabilistic Shaping for Arbitrary Modulation Formats
    78.
    发明申请
    Probabilistic Shaping for Arbitrary Modulation Formats 审中-公开

    公开(公告)号：US20190109752A1

    公开(公告)日：2019-04-11

    申请号：US16153029

    申请日：2018-10-05

    申请人： NEC Laboratories America, Inc.

    发明人： Shaoliang Zhang ,  Fatih Yaman ,  Ting Wang ,  Zhen Qu

    IPC分类号： H04L27/34 ,  H04B10/516 ,  H04B10/61 ,  H04L1/00

    CPC分类号： H04L27/345 ,  H04B10/5161 ,  H04B10/541 ,  H04B10/616 ,  H04L1/0058 ,  H04L1/0061 ,  H04L27/3405

    摘要： Systems and methods for optical data transport, including controlling data transport across an optical transmission medium by generating two-dimensional (2D) distribution matchers (DMs) based on probabilistic fold shaping (PFS) and arbitrary probabilistic shaping (APS). The 2D PFS-based DM is can encode any N-fold rotationally symmetrical Quadrature Amplitude Modulation (QAM) format by applying the 2D PFS-based DM only to symbols in one quadrant based on a target entropy. A fold index yield uniform distribution is determined, and is utilized to carry generated uniform distributed parity check bits across the optical transmission medium. The 2D APS-based DM can encode any arbitrary modulation formats by encoding uniform binary data to generate non-uniform target symbols, and generating a probability distribution for the target symbols by indirectly applying the 2D APS-based DM based on a target probability distribution and a detected code rate of generated FEC code.

    NEURAL NETWORK TRANSFER LEARNING FOR QUALITY OF TRANSMISSION PREDICTION
    80.
    发明申请
    NEURAL NETWORK TRANSFER LEARNING FOR QUALITY OF TRANSMISSION PREDICTION 审中-公开

    公开(公告)号：US20190108445A1

    公开(公告)日：2019-04-11

    申请号：US16153018

    申请日：2018-10-05

    申请人： NEC Laboratories America, Inc.

    发明人： Yue-Kai Huang ,  Shaoliang Zhang ,  Ezra Ip ,  Weiyang Mo

    IPC分类号： G06N3/08

    摘要： Systems and methods for predicting performance of a modulation system are provided. A neural network model is trained using performance information of a source system. The neural network model is modified with transferable knowledge about a target system to be evaluated. The neural network model is tuned using specific characteristics of the target system to create a source-based target model. The target system performance is evaluated using the source-based target model to predict system performance of the target system.