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1. 发明申请

US20100329697A1 DIGITAL COHERENT RECEIVING APPARATUS 有权
标题翻译：数码相机接收装置
公开(公告)号：US20100329697A1
公开(公告)日：2010-12-30
申请号：US12821061
申请日：2010-06-22
申请人： Nobukazu KOIZUMI , Takeshi Hoshida , Takahito Tanimura , Hisao Nakashima , Koji Nakamuta , Noriyasu Nakayama
发明人： Nobukazu KOIZUMI , Takeshi Hoshida , Takahito Tanimura , Hisao Nakashima , Koji Nakamuta , Noriyasu Nakayama
IPC分类号： H04B10/06
CPC分类号： H04B10/616 , H03J7/26 , H04B10/60 , H04B10/611 , H04B10/614 , H04B10/6165 , H04L7/0335 , H04L27/0014 , H04L27/223 , H04L27/2276 , H04L2027/0016 , H04L2027/0067
摘要： A digital coherent receiving apparatus includes a first oscillator for outputting a local light signal of a fixed frequency, a hybrid unit mixing the local light signal with a light signal received by a receiver, a second oscillator for outputting a sampling signal of a sampling frequency, a converter for converting the mixed light signal into digital signal synchronizing with the sampling signal, a waveform adjuster for adjusting a waveform distortion of the converted digital signal, a phase adjustor for adjusting a phase of the digital signal adjusted by the waveform adjustor, a demodulator for demodulating the digital signal adjusted by the phase adjuster, and a phase detector for detecting a phase of the digital signal adjusted by the phase adjuster, and a control signal output unit for outputting a frequency control signal on the basis of the detected phase signal to the second oscillator.
摘要翻译：数字相干接收装置包括用于输出固定频率的本地光信号的第一振荡器，将本地光信号与由接收机接收的光信号混合的混合单元，用于输出采样频率的采样信号的第二振荡器，用于将混合光信号转换为与采样信号同步的数字信号的转换器，用于调整转换的数字信号的波形失真的波形调节器，用于调整由波形调节器调节的数字信号的相位的相位调节器，解调器用于解调由相位调节器调节的数字信号，以及相位检测器，用于检测由相位调节器调节的数字信号的相位;以及控制信号输出单元，用于根据检测到的相位信号将频率控制信号输出到第二个振荡器。

2. 发明申请

US20120128377A1 OPTICAL DIGITAL COHERENT RECEIVER 有权
标题翻译：光学数字相干接收机
公开(公告)号：US20120128377A1
公开(公告)日：2012-05-24
申请号：US13196997
申请日：2011-08-03
申请人： Kazuhiko HATAE , Noriyasu NAKAYAMA , Nobukazu KOIZUMI , Yuji OBANA
发明人： Kazuhiko HATAE , Noriyasu NAKAYAMA , Nobukazu KOIZUMI , Yuji OBANA
IPC分类号： H04L27/01 , H04B10/06
CPC分类号： H04B10/616 , H04L25/03019 , H04L25/03248 , H04L27/223 , H04L27/3809 , H04L27/3818
摘要： An ALC processing unit to adjust the signal level of outputs from an adaptive equalizer to a target value is provided in a stage later than the adaptive equalizer and earlier than a frequency offset estimation/compensation unit in an optical digital coherent receiver. The ALC processing unit generates a histogram that counts the number of samples for discrete monitored values corresponding to amplitude values of outputs from the adaptive equalizer, and determines a level adjustment coefficient that is to be multiplied by an output from the adaptive equalizer so as to multiply the determined coefficient by the output from the adaptive equalizer so that the monitored value of the peak value of the histogram is the target value.
摘要翻译：在自适应均衡器之后的阶段中比在光学数字相干接收机中的频率偏移估计/补偿单元早的阶段提供用于将从自适应均衡器输出的信号电平调整到目标值的ALC处理单元。 ALC处理单元产生对来自自适应均衡器的输出的振幅值对应的离散监视值的采样数进行计数的直方图，并确定要与自适应均衡器的输出相乘的电平调整系数，以便乘以通过来自自适应均衡器的输出确定的系数，使得直方图的峰值的监视值为目标值。

3. 发明申请

US20120134685A1 LOOP FILTER 有权
标题翻译：循环过滤器
公开(公告)号：US20120134685A1
公开(公告)日：2012-05-31
申请号：US13233588
申请日：2011-09-15
申请人： Yasuo OHTOMO , Nobukazu KOIZUMI
发明人： Yasuo OHTOMO , Nobukazu KOIZUMI
IPC分类号： H04B10/06 , G06F7/42 , G06F7/44
CPC分类号： H04B10/6164 , H04B10/611 , H04B10/613 , H04B10/614 , H04B10/616
摘要： A loop filter include: a register that stores a result of arithmetic operation performed on a complex signal and outputs the stored complex signal; a first multiplier that multiplies the complex signal output from the register and a predetermined coefficient; an absolute value judging unit that outputs a multiplier coefficient used to control such that the amplitude of the complex signal output from the register is held in a predetermined range; a multiplier that multiplies an output from the first multiplier and the multiplier coefficient; a second multiplier that multiplies an input signal and a value (1−the predetermined coefficient); and an adder that adds an output from the multiplier to an output from the second multiplier and inputs a result of addition into the register.
摘要翻译：环路滤波器包括：寄存器，其存储对复数信号执行的算术运算结果，并输出所存储的复信号; 第一乘法器，将来自寄存器的复信号输出与预定系数相乘; 绝对值判断单元，输出用于控制的寄生器系数，使得从寄存器输出的复数信号的幅度保持在预定范围内; 乘法器，用于将来自第一乘法器的输出和乘数系数相乘; 将输入信号与值（1-预定系数）相乘的第二乘法器; 以及将乘法器的输出与来自第二乘法器的输出相加并将相加结果输入到寄存器的加法器。

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