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    • 7. 发明授权
    • Waveform reconstruction device, waveform reconstruction system, and waveform reconstruction method
    • 波形重建装置,波形重建系统和波形重建方法
    • US08886037B2
    • 2014-11-11
    • US13254624
    • 2010-03-02
    • Tsuyoshi KonishiTakuya KatoHiroomi Goto
    • Tsuyoshi KonishiTakuya KatoHiroomi Goto
    • H04B10/08G01J3/02G01J11/00
    • G01J11/00G01J3/02G01J3/0213G01J3/0218G01J3/0245
    • Provided is a waveform reconstruction device capable of easily reconstructing an accurate time waveform of an optical signal without using an ultrafast time gate or a reference light source. A waveform reconstruction device (140) includes: a phase spectrum calculation unit (143) which (i) calculates a power spectrum of an output optical signal for each of a plurality of intensities of an input optical signal, when a phase spectrum of the input optical signal having the plurality of intensities is assumed to have a given phase spectrum, by simulating, using a parameter related to self-phase modulation of an optical fiber, propagation of the input optical signal through the optical fiber, and (ii) calculates, as the phase spectrum of the input optical signal, the given phase spectrum when a difference value between the calculated power spectrum and a measured power spectrum is equal to or less than a threshold value; and a waveform reconstruction unit (144) which reconstructs the time waveform of the input optical signal by performing frequency-time transform on the calculated phase spectrum and the power spectrum of the input optical signal.
    • 提供一种波形重构装置,能够容易地重构光信号的精确时间波形而不使用超快时间门或参考光源。 波形重建装置(140)包括:相位谱计算单元(143),其对于输入光信号的多个强度中的每一个计算输出光信号的功率谱,当输入的相位谱 假设具有多个强度的光信号具有给定的相位频谱,通过使用与光纤的自相位调制有关的参数,通过光纤传播输入光信号,并且(ii) 作为输入光信号的相位频谱,当所计算的功率谱与测量的功率谱之间的差值等于或小于阈值时,给定的相位频谱; 以及波形重构单元(144),通过对计算出的相位频谱和输入光信号的功率谱进行频率 - 时间变换来重构输入光信号的时间波形。
    • 8. 发明申请
    • WAVEFORM RECONSTRUCTION DEVICE, WAVEFORM RECONSTRUCTION SYSTEM, AND WAVEFORM RECONSTRUCTION METHOD
    • 波形重建设备,波形重建系统和波形重建方法
    • US20110311223A1
    • 2011-12-22
    • US13254624
    • 2010-03-02
    • Tsuyoshi KonishiTakuya KatoHiroomi Goto
    • Tsuyoshi KonishiTakuya KatoHiroomi Goto
    • H04B10/08
    • G01J11/00G01J3/02G01J3/0213G01J3/0218G01J3/0245
    • Provided is a waveform reconstruction device capable of easily reconstructing an accurate time waveform of an optical signal without using an ultrafast time gate or a reference light source. A waveform reconstruction device (140) includes: a phase spectrum calculation unit (143) which (i) calculates a power spectrum of an output optical signal for each of a plurality of intensities of an input optical signal, when a phase spectrum of the input optical signal having the plurality of intensities is assumed to have a given phase spectrum, by simulating, using a parameter related to self-phase modulation of an optical fiber, propagation of the input optical signal through the optical fiber, and (ii) calculates, as the phase spectrum of the input optical signal, the given phase spectrum when a difference value between the calculated power spectrum and a measured power spectrum is equal to or less than a threshold value; and a waveform reconstruction unit (144) which reconstructs the time waveform of the input optical signal by performing frequency-time transform on the calculated phase spectrum and the power spectrum of the input optical signal.
    • 提供一种波形重构装置,能够容易地重构光信号的精确时间波形而不使用超快时间门或参考光源。 波形重建装置(140)包括:相位谱计算单元(143),其对于输入光信号的多个强度中的每一个计算输出光信号的功率谱,当输入的相位谱 假设具有多个强度的光信号具有给定的相位频谱,通过使用与光纤的自相位调制有关的参数,通过光纤传播输入光信号,并且(ii) 作为输入光信号的相位频谱,当所计算的功率谱与测量的功率谱之间的差值等于或小于阈值时,给定的相位频谱; 以及波形重构单元(144),通过对计算出的相位频谱和输入光信号的功率谱进行频率 - 时间变换来重构输入光信号的时间波形。
    • 9. 发明授权
    • Communication terminal device, communication system, communication method, and program
    • 通信终端设备,通信系统,通信方式和程序
    • US07990903B2
    • 2011-08-02
    • US11370257
    • 2006-03-07
    • Jun NishiharaTakuya Kato
    • Jun NishiharaTakuya Kato
    • H04H20/71
    • H04W84/20G06Q50/12
    • A communication terminal device, a communication system, a communication method, and a program which can realize the functions of joining and exiting from a network in the middle of communication, detecting disappearance of stations (communication terminals), and/or changing over a coordinator function. The communication terminal has the capabilities of: detecting disappearance of a coordinator in the network by lack of reception of beacons and frames from other terminals, and, if its transmission timing at a certain TBTT is the shortest within a network, serving as a new coordinator itself to transmit beacons; and serving as a communication-holding coordinator having entered a predetermined mode, and transmitting a change request frame to a communication terminal to which changeover of a coordinator function is requested, thereby transferring the coordinator function to a communication terminal not functioning as the coordinator.
    • 通信终端装置,通信系统,通信方法以及程序,能够在通信中途实现从网络进入和退出的功能,检测站(通信终端)的消失,和/或改变协调器 功能。 通信终端具有以下能力:通过缺少来自其他终端的信标和帧的接收来检测网络中的协调器的消失,并且如果其在某一TBTT的传输定时在网络内是最短的,则作为新协调器 本身传输信标; 并且作为进入预定模式的通信保持协调器,并且向请求协调器功能的转换的通信终端发送改变请求帧,从而将协调器功能传送到不用作协调器的通信终端。