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    NEURAL NETWORK TRANSFER LEARNING FOR QUALITY OF TRANSMISSION PREDICTION
    42.
    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

    Applicant: NEC Laboratories America, Inc.

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

    IPC: G06N3/08

    Abstract: 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.

    ULTRA-WIDE RANGE OPTICAL WAVELENGTH CONVERTER BY DIRECT SIGNAL TRANSLATION FROM INTEGRATED COHERENT RECEIVER TO DUAL-POLARIZATION IQ MODULATOR
    46.
    发明申请
    ULTRA-WIDE RANGE OPTICAL WAVELENGTH CONVERTER BY DIRECT SIGNAL TRANSLATION FROM INTEGRATED COHERENT RECEIVER TO DUAL-POLARIZATION IQ MODULATOR 有权
    通过直接信号转换从一体化并联接收器到双极化IQ超调幅度范围的光学范围变换器IQ调制器

    公开(公告)号：US20160105238A1

    公开(公告)日：2016-04-14

    申请号：US14846348

    申请日：2015-09-04

    Applicant: NEC Laboratories America, Inc.

    Inventor： Yue-Kai Huang ,  Shaoliang Zhang ,  Fatih Yaman

    IPC: H04B10/2537 ,  H04B10/532

    CPC classification number: H04J14/06 ,  H04B10/29 ,  H04B10/61

    Abstract: A method of wavelength conversion without polarization tracking is provided. A system is also provided that converts an input signal into an output signal of a different wavelength that contains all of the amplitude, phase, and polarization information of the original signal. The method includes separating, using a polarization-diversity optical mixer, an input optical signal of a first wavelength into a plurality of electrical signals containing amplitudes and phases while maintaining the polarization information of the input signal, converting each of the amplitudes and phases into individual photo-currents using a photo-diode, converting each of the output photo-currents into voltages using an amplifier, modulating the multitude of voltages to a second wavelength using a modulator, where the separated electrical signals are up-converted to generate an output optical signal that maintains the same amplitude, phase, and polarization information as was contained in the input signal.

    Abstract translation: 提供了一种没有偏振跟踪的波长转换方法。 还提供了一种系统，其将输入信号转换成包含原始信号的所有振幅，相位和极化信息的不同波长的输出信号。 该方法包括：使用偏振分集光混合器将第一波长的输入光信号分离成包含幅度和相位的多个电信号，同时保持输入信号的偏振信息，将每个幅度和相位转换为单独的 使用光电二极管的光电流，使用放大器将每个输出光电流转换成电压，使用调制器将多个电压调制到第二波长，其中分离的电信号被上变频以产生输出光学 信号，其保持与包含在输入信号中相同的幅度，相位和极化信息。

    Frequency-drift compensation in chirped-pulse-based distributed acoustic sensing
    48.
    发明授权
    Frequency-drift compensation in chirped-pulse-based distributed acoustic sensing 有权

    公开(公告)号：US12135234B2

    公开(公告)日：2024-11-05

    申请号：US17967812

    申请日：2022-10-17

    Applicant: NEC Laboratories America, Inc.

    Inventor： Ezra Ip ,  Yue-Kai Huang

    IPC: G01H9/00 ,  G01D5/26 ,  G01D5/353 ,  H04L27/227

    Abstract: Aspects of the present disclosure directed to frequency drift compensation for coded-DAS systems that use chirped pulses as a probe signal. Our inventive approach estimates timing jitter by correlating the amplitude of the estimated Rayleigh impulse response of every frame with a reference frame, and then re-aligns each frame by the estimated timing jitter. As the amount of timing jitter varies within a frame, every frame is divided into blocks where all samples have similar timing jitter, and perform timing jitter estimation and compensation on a block-by-block, frame-by-frame basis using an overlap-and-save method. Tracking of a slowly changing channel is enabled by allowing the reference frame to be periodically updated.

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