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    Repeater and repeating method
    52.
    发明授权
    Repeater and repeating method 有权
    中继器和重复方法

    公开(公告)号：US08351797B2

    公开(公告)日：2013-01-08

    申请号：US12656363

    申请日：2010-01-27

    申请人： Hisao Nakashima ,  Takeshi Hoshida

    发明人： Hisao Nakashima ,  Takeshi Hoshida

    IPC分类号： H04B10/00

    CPC分类号： H04B10/299 ,  H04B2210/258

    摘要： A repeater is disclosed that transmits an optical signal using wave division multiplexing. The repeater includes a demultiplexing unit that separates plural channels contained in the optical signal, an adjusting unit that adjusts at least optical power of each of the channels according to a control signal, a multiplexing unit that outputs a multiple wavelength signal in which the channels are multiplexed, and a monitoring unit that determines a modulation scheme and a bit rate of the optical signal for each of the channels so as to generate the control signal.

    摘要翻译： 公开了使用波分复用来发送光信号的中继器。 中继器包括：分离单元，分离包含在光信号中的多个信道;调节单元，用于根据控制信号调整至少每个信道的光功率;多路复用单元，其输出信道为 以及监测单元，其确定每个信道的光信号的调制方案和比特率，以便产生控制信号。

    Optical transmitter
    53.
    发明授权
    Optical transmitter 有权
    光发射机

    公开(公告)号：US08145069B2

    公开(公告)日：2012-03-27

    申请号：US11740954

    申请日：2007-04-27

    申请人： Toshiki Tanaka ,  Takeshi Hoshida ,  Hisao Nakashima ,  Yuichi Akiyama

    发明人： Toshiki Tanaka ,  Takeshi Hoshida ,  Hisao Nakashima ,  Yuichi Akiyama

    IPC分类号： H04B10/04

    CPC分类号： H04B10/50572 ,  H04B10/505 ,  H04B10/50575 ,  H04B10/564

    摘要： A signal Data1 and Data2 are output from a DQPSK signal source. The output signal is input to the modulator drivers 1 and 2 of the differential output. A drive signal is applied from the drivers 1 and 2 to a modulator, and modulated light is output. An optical coupler 20 branches modulator output, and a power monitor 21 detects the power of the branched light. A detection result is transmitted to an amplitude control unit 22. The amplitude control unit 22 adjusts the amplitude of the drivers 1 and 2 such that the detection result of the power monitor 21 can be the maximum.

    摘要翻译： 从DQPSK信号源输出信号Data1和Data2。 输出信号被输入到差分输出的调制器驱动器1和2。 将驱动信号从驱动器1和2施加到调制器，并输出调制光。 光耦合器20分支调制器输出，功率监视器21检测分支光的功率。 检测结果被发送到幅度控制单元22.振幅控制单元22调节驱动器1和2的振幅，使得功率监视器21的检测结果可以是最大的。

    Repeater and repeating method
    54.
    发明申请
    Repeater and repeating method 有权

    公开(公告)号：US20100135663A1

    公开(公告)日：2010-06-03

    申请号：US12656363

    申请日：2010-01-27

    申请人： Hisao Nakashima ,  Takeshi Hoshida

    发明人： Hisao Nakashima ,  Takeshi Hoshida

    IPC分类号： H04B10/00 ,  H04J14/02

    CPC分类号： H04B10/299 ,  H04B2210/258

    摘要： A repeater is disclosed that transmits an optical signal using wave division multiplexing. The repeater includes a demultiplexing unit that separates plural channels contained in the optical signal, an adjusting unit that adjusts at least optical power of each of the channels according to a control signal, a multiplexing unit that outputs a multiple wavelength signal in which the channels are multiplexed, and a monitoring unit that determines a modulation scheme and a bit rate of the optical signal for each of the channels so as to generate the control signal.

    Analog-to-digital conversion controller, optical receiving device, optical receiving method, and waveform-distortion compensating device
    56.
    发明授权
    Analog-to-digital conversion controller, optical receiving device, optical receiving method, and waveform-distortion compensating device 有权
    模数转换控制器，光接收装置，光接收方式和波形失真补偿装置

    公开(公告)号：US07602322B2

    公开(公告)日：2009-10-13

    申请号：US12068234

    申请日：2008-02-04

    申请人： Takahito Tanimura ,  Hisao Nakashima ,  Takeshi Hoshida

    发明人： Takahito Tanimura ,  Hisao Nakashima ,  Takeshi Hoshida

    IPC分类号： H03M1/06

    CPC分类号： H04L7/007 ,  H03M1/1255 ,  H04B10/697

    摘要： An optical receiving device of the present invention receives optical signals from an optical transmitting device which uses a modulation format wherein an optical intensity waveform of each symbol is return-to-zero (RZ) pulse, and converts the received optical signals into digital signals by a conversion process of an analog to digital (AD) converter. A control-value calculating unit subsequent to the AD converter digitally processes the digital signals, retrieves an absolute value of the digital signals or a value corresponding one-to-one with the absolute value of the digital signals, estimates errors from an appropriate timing of a sampling timing in the AD converter based on the absolute value of the digital signals or the value corresponding one-to-one with the absolute value of the digital signals, and calculates a control value controlling the sampling timing based on the estimated errors. Based on the control value, a phase of a pulse regulating the sampling timing of AD conversion can be compensated.

    摘要翻译： 本发明的光接收装置接收来自光发送装置的光信号，该光发送装置采用调制格式，其中每个符号的光强度波形为归零（RZ）脉冲，并将接收到的光信号转换成数字信号 模数转换器（AD）转换器的转换过程。 AD转换器之后的控制值计算单元对数字信号进行数字处理，用数字信号的绝对值检索数字信号的绝对值或与之对应的值，从适当的定时估计误差 基于数字信号的绝对值的AD转换器中的采样定时或与数字信号的绝对值一一对应的值，并且基于估计的误差来计算控制采样定时的控制值。 基于控制值，可以补偿调节AD转换的采样定时的脉冲的相位。

    Optical receiving apparatus and method
    57.
    发明申请
    Optical receiving apparatus and method 审中-公开
    光接收装置及方法

    公开(公告)号：US20090226187A1

    公开(公告)日：2009-09-10

    申请号：US12320069

    申请日：2009-01-15

    申请人： Takahito Tanimura ,  Takeshi Hoshida ,  Hisao Nakashima ,  Shoichiro Oda

    发明人： Takahito Tanimura ,  Takeshi Hoshida ,  Hisao Nakashima ,  Shoichiro Oda

    IPC分类号： H04B10/06

    CPC分类号： H04B10/677 ,  H04B10/60 ,  H04B10/69

    摘要： An optical receiving apparatus compensates degradation of an optical signal received, based a division operation using the intensity of the optical signal. A receiving unit outputs a first electrical signal corresponding to the phase of the optical signal and a second electrical signal corresponding to the intensity of the optical signal. An analog first dividing unit and a second dividing unit divide the first electrical signal by the second electrical signal. A first ADC and a second ADC convert the divided electrical signal to a digital signal. An identifying unit identifies data of the optical signal based on calculation using the digital signal.

    摘要翻译： 光接收装置基于使用光信号的强度的分割操作来补偿所接收的光信号的劣化。 接收单元输出对应于光信号的相位的第一电信号和对应于光信号的强度的第二电信号。 模拟第一分割单元和第二分割单元将第一电信号除以第二电信号。 第一ADC和第二ADC将分频电信号转换为数字信号。 识别单元基于使用数字信号的计算来识别光信号的数据。

    ADAPTIVE OPTIMIZATION METHOD AND APPARATUS FOR AVERAGE LENGTH
    58.
    发明申请
    ADAPTIVE OPTIMIZATION METHOD AND APPARATUS FOR AVERAGE LENGTH 有权
    自适应优化方法和平均长度的设备

    公开(公告)号：US20100002810A1

    公开(公告)日：2010-01-07

    申请号：US12495834

    申请日：2009-07-01

    申请人： Lei LI ,  Zhenning Tao ,  Hisao Nakashima

    发明人： Lei LI ,  Zhenning Tao ,  Hisao Nakashima

    IPC分类号： H04L27/227

    CPC分类号： H04B10/611 ,  H04B10/60 ,  H04B10/6165 ,  H04B10/697

    摘要： The invention provides an average length adaptive optimization method and apparatus. An adaptive optimization method for the average length used for phase recovery comprising: a residual phase difference calculation step, for receiving a current phase of a digital symbol obtained by phase recovery and a data modulation phase of the digital symbol obtained by data recovery, and calculating a residual phase difference of the digital symbol, which is a difference between the current phase and the data modulation phase of the digital symbol; a residual phase difference auto-correlation value calculation step, for calculating an auto-correlation value of the residual phase difference with displacement m, wherein −10≦m≦10, and m is an integral; an optimization step, for optimizing the average length based on the residual phase difference auto-correlation value.

    摘要翻译： 本发明提供一种平均长度自适应优化方法和装置。 一种用于相位恢复的平均长度的自适应优化方法，包括：残差相位差计算步骤，用于接收通过相位恢复获得的数字符号的当前相位和通过数据恢复获得的数字符号的数据调制阶段，以及计算 数字符号的剩余相位差，其是数字符号的当前相位和数据调制相位之间的差; 剩余相位差自相关值计算步骤，用于计算残留相位差与位移m的自相关值，其中-10 <= m <= 10，m是积分; 优化步骤，根据残差相位自相关值优化平均长度。

    Optical coherent receiver, frequency offset estimating apparatus and method for optical coherent receiver
    59.
    发明申请
    Optical coherent receiver, frequency offset estimating apparatus and method for optical coherent receiver 有权
    光学相干接收机，用于光学相干接收机的频偏估计装置和方法

    公开(公告)号：US20090129787A1

    公开(公告)日：2009-05-21

    申请号：US12289072

    申请日：2008-10-20

    申请人： Lei Li ,  Zhenning Tao ,  Hisao Nakashima

    发明人： Lei Li ,  Zhenning Tao ,  Hisao Nakashima

    IPC分类号： H04B10/06

    CPC分类号： H04B10/6164 ,  H04B10/61 ,  H04B10/613 ,  H04B10/6161 ,  H04B10/6162 ,  H04B10/6165 ,  H04B10/63

    摘要： The present invention discloses an optical coherent receiver, and a frequency offset estimating apparatus and a frequency offset estimating method for use in the optical coherent receiver. The optical coherent receiver includes a front end processing section for changing an optical signal into a base band digital electric signal. The frequency offset estimating apparatus comprises a phase offset calculating section, for calculating a phase offset in said base band digital electric signal; a phase offset change calculating section, for calculating a change of said phase offset, namely a phase offset change, in accordance with the phase offset calculated by said phase offset calculating section; an ambiguity deciding section, for deciding whether there is ambiguity in said phase offset change calculated by said phase offset change calculating section, and outputting the phase offset change having no ambiguity; and a loop filtering section, for acquiring a weighted average of the phase offset change outputted by said ambiguity deciding section.

    摘要翻译： 本发明公开了一种光学相干接收机，以及用于光学相干接收机中的频率偏移估计装置和频率偏移估计方法。 光相干接收机包括用于将光信号改变为基带数字电信号的前端处理部分。 所述频偏估计装置包括：相位偏移计算部，用于计算所述基带数字电信号中的相位偏移; 相位偏移改变计算部分，用于根据由所述相位偏移计算部分计算的相位偏移来计算所述相位偏移的变化，即相位偏移改变; 模糊判定部，用于判定由所述相位偏移变化计算部计算出的所述相位偏移变化是否存在歧义，并输出没有模糊性的相位偏移变化; 以及环路滤波部分，用于获取由所述模糊判定部分输出的相位偏移改变的加权平均值。