公开(公告)号：US08929750B2

公开(公告)日：2015-01-06

申请号：US13318757

申请日：2010-05-18

申请人： Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Masato Mizoguchi ,  Akihide Sano ,  Shogo Yamanaka ,  Etsushi Yamazaki ,  Yutaka Miyamoto ,  Eiji Yoshida ,  Tadao Nakagawa

发明人： Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Masato Mizoguchi ,  Akihide Sano ,  Shogo Yamanaka ,  Etsushi Yamazaki ,  Yutaka Miyamoto ,  Eiji Yoshida ,  Tadao Nakagawa

IPC分类号： H04B10/06 ,  H04B10/2513 ,  H04B10/079 ,  H04B10/556 ,  H04B10/61 ,  H04L7/027

CPC分类号： H04B10/50 ,  H04B10/07951 ,  H04B10/2513 ,  H04B10/556 ,  H04B10/616 ,  H04B10/6161 ,  H04L7/027

摘要： To enable signal position detection, frequency offset compensation, clock offset compensation, and chromatic dispersion amount estimation in a communication system based on coherent detection using an optical signal, even on a signal having a great offset in an arrival time depending on a frequency due to chromatic dispersion. An optical signal transmitting apparatus generates specific frequency band signals having power concentrated on two or more specific frequencies and transmits a signal including the specific frequency band signals. An optical signal receiving apparatus converts a received signal into a digital signal, detects positions of the specific frequency band signals from the converted digital signal, estimates frequency positions of the detected specific frequency band signals, and detects a frequency offset between an optical signal receiving apparatus and an optical signal transmitting apparatus. Moreover, the optical signal receiving apparatus detects a clock offset between the optical signal receiving apparatus and the optical signal transmitting apparatus from an interval between the estimated frequency positions of the specific frequency band signals. Furthermore, the optical signal receiving apparatus estimates temporal positions of the detected specific frequency band signals and detects a chromatic dispersion amount from a difference between the temporal positions of the specific frequency band signals corresponding to different frequencies.

摘要翻译： 为了使基于使用光信号的相干检测的通信系统中的信号位置检测，频率偏移补偿，时钟偏移补偿和色散量估计，即使在到达时间上具有很大偏移的信号，这取决于由于 色散。 光信号发送装置产生具有集中在两个或更多个特定频率上的功率的特定频带信号，并发送包括特定频带信号的信号。 光信号接收装置将接收到的信号转换为数字信号，检测来自转换的数字信号的特定频带信号的位置，估计检测到的特定频带信号的频率位置，并检测光信号接收装置 和光信号发送装置。 此外，光信号接收装置从特定频带信号的估计频率位置之间的间隔检测光信号接收装置和光信号发送装置之间的时钟偏移。 此外，光信号接收装置估计检测到的特定频带信号的时间位置，并且根据与不同频率对应的特定频带信号的时间位置之间的差来检测色散量。

公开(公告)号：US08855485B2

公开(公告)日：2014-10-07

申请号：US13640114

申请日：2011-04-14

申请人： Tadao Nakagawa ,  Yasushi Takatori ,  Riichi Kudo ,  Munehiro Matsui ,  Koichi Ishihara ,  Takayuki Kobayashi ,  Etsushi Yamazaki ,  Akihide Sano ,  Eiji Yoshida ,  Masato Mizoguchi ,  Yutaka Miyamoto

发明人： Tadao Nakagawa ,  Yasushi Takatori ,  Riichi Kudo ,  Munehiro Matsui ,  Koichi Ishihara ,  Takayuki Kobayashi ,  Etsushi Yamazaki ,  Akihide Sano ,  Eiji Yoshida ,  Masato Mizoguchi ,  Yutaka Miyamoto

IPC分类号： H04B10/08 ,  H04J11/00 ,  H01Q17/00 ,  H04L27/26

CPC分类号： H04L27/2657 ,  H04L27/2676 ,  H04L27/2684

摘要： When a circuit that calculates a frequency offset using a shape of a frequency spectrum is implemented by hardware, the circuit size can be reduced. A frequency offset estimating method for estimating the difference between a carrier frequency of a reception signal and the frequency of an output signal of a local oscillator includes performing a discrete Fourier transform on a reception signal previously sampled at a predetermined sampling frequency and outputting a frequency spectrum with a plurality of frequency components, calculating an average power of the frequency spectrum, calculating a threshold by adding a predetermined value to the average power or power obtained by multiplying the average power by a constant, performing 1-bit quantization on powers of the frequency components of the frequency spectrum based on the threshold, and calculating a centroid frequency by multiplying frequencies of the frequency components by powers of 1-bit quantized frequency components, calculating the sum of multiplied products, and dividing the sum of the products by the sum of the powers of the 1-bit quantized frequency components of the frequency spectrum.

摘要翻译： 当使用频谱的形状计算频率偏移的电路由硬件实现时，可以减小电路尺寸。 用于估计接收信号的载波频率与本地振荡器的输出信号的频率之间的差异的频率偏移估计方法包括对以预定采样频率预先采样的接收信号执行离散付里叶变换，并输出频谱 具有多个频率分量，计算频谱的平均功率，通过将平均功率或平均功率乘以常数获得的功率相加预定值来计算阈值，对频率的功率执行1比特量化 基于阈值的频谱的分量，并且通过将频率分量的频率乘以1比特量化频率分量的功率来计算质心频率，计算乘积的总和，并将乘积的和除以 1位量化频率分量的功率 频谱。

公开(公告)号：US08787769B2

公开(公告)日：2014-07-22

申请号：US13380432

申请日：2010-07-14

申请人： Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Masato Mizoguchi ,  Tadao Nakagawa ,  Etsushi Yamazaki ,  Akihide Sano ,  Yutaka Miyamoto ,  Eiji Yoshida ,  Shogo Yamanaka

发明人： Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Masato Mizoguchi ,  Tadao Nakagawa ,  Etsushi Yamazaki ,  Akihide Sano ,  Yutaka Miyamoto ,  Eiji Yoshida ,  Shogo Yamanaka

IPC分类号： H04B10/00 ,  H04B10/06

CPC分类号： H04B10/0775 ,  H04B3/06 ,  H04B10/25133

摘要： In order to compensate for chromatic dispersion caused by optical fiber transmission in a communication system with coherent detection using optical signals, specific frequency band signals are used to enable estimation of a chromatic dispersion value. The chromatic dispersion value calculating apparatus is provided with: a signal distributing circuit which distributes, into a plurality of signal sequences, an electrical digital signal converted from received optical signals of an optical signal transmitted by an optical signal transmitting apparatus, in which a known signal with concentrated frequency components of a plurality of specific frequencies is appended to a signal generated from a transmission data sequence; a plurality of frequency band pass filter circuits, each of which separating only each of a plurality of specific frequency components in which the known signal is included from each of the signal sequences distributed by the signal distributing circuit, and passing each of the specific frequency components therethrough; a plurality of power calculating circuits which are provided so as to correspond respectively to the plurality of frequency band pass filter circuits and which calculate power values of signals output from the corresponding frequency band pass filter circuits; a delay time calculating circuit which detects times at which power has the maximum value or times at which the power exceeds a predetermined threshold value, respectively from signal sequences of the power values output from the plurality of power calculating circuits, and which compares the detected times; and a chromatic dispersion value calculating circuit which calculates a chromatic dispersion value based on a comparison result of the times by the delay time calculating circuit.

摘要翻译： 为了补偿在使用光信号的相干检测的通信系统中由光纤传输引起的色散，使用特定的频带信号来使得能够估计色散值。 色散值计算装置具有：信号分配电路，其将由光信号发送装置发送的光信号的接收光信号转换成的数字信号分配成多个信号序列，其中已知信号 将多个特定频率的集中频率分量附加到从发送数据序列生成的信号上; 多个频带滤波器电路，每个频带通滤波器电路仅分离由信号分配电路分配的每个信号序列中包含已知信号的多个特定频率分量中的每一个，并且使每个特定频率分量 通过 多个功率计算电路，被设置为分别对应于所述多个频带滤波器电路，并且计算从相应的频带滤波器电路输出的信号的功率值; 延迟时间计算电路，分别从多个功率计算电路输出的功率值的信号序列中分别检测功率达到功率超过预定阈值的最大值或多次的时间，并且将延迟时间计算电路 ; 以及色散值计算电路，其基于延迟时间计算电路的时间的比较结果来计算色散值。

公开(公告)号：US20140153077A1

公开(公告)日：2014-06-05

申请号：US14122687

申请日：2012-08-21

申请人： Hiroto Kawakami ,  Eiji Yoshida ,  Yutaka Miyamoto

发明人： Hiroto Kawakami ,  Eiji Yoshida ,  Yutaka Miyamoto

IPC分类号： G02F1/01

CPC分类号： G02F1/0123 ,  G02B6/28 ,  G02F1/21 ,  G02F2001/212 ,  H04B10/5053 ,  H04B10/50575 ,  H04B10/50595 ,  H04B10/541 ,  H04B10/548 ,  H04L27/3411 ,  H04L27/364

摘要： An optical modulation device including: bias power supplies that output a signal having a bias voltage corresponding to the null point of an optical modulation unit to the optical modulation unit; and synchronous detection circuits that determine whether an intensity of a QAM signal at a drift non-occurrence time where no drift occurs in the bias voltage becomes larger or smaller than the intensity of the QAM signal at a drift occurrence time where a drift occurs in the bias voltage, adjust the bias voltage to maximize the intensity of the QAM signal when determining that the intensity of the QAM signal at the drift non-occurrence time becomes larger than the intensity of the QAM signal at the drift occurrence time, and adjust the bias voltage to minimize the intensity of the QAM signal when determining that the intensity of the QAM signal at the drift non-occurrence time becomes smaller than the intensity of the QAM signal at the drift occurrence time.

摘要翻译： 一种光调制装置，包括：向光调制单元输出具有对应于光调制单元的零点的偏置电压的信号的偏置电源; 以及同步检测电路，其确定在偏置电压中不发生漂移的漂移不发生时间的QAM信号的强度是否大于或者小于在漂移发生时的QAM信号的强度， 当确定漂移不发生时间的QAM信号的强度变得大于漂移发生时的QAM信号的强度时，调整偏置电压以最大化QAM信号的强度，并且调整偏置 电压，以便在确定漂移不发生时间的QAM信号的强度变得小于漂移发生时的QAM信号的强度时，使QAM信号的强度最小化。

公开(公告)号：US08355637B2

公开(公告)日：2013-01-15

申请号：US12865827

申请日：2009-02-20

申请人： Akihide Sano ,  Eiichi Yamada ,  Takayuki Kobayashi ,  Koichi Ishihara ,  Yutaka Miyamoto ,  Riichi Kudo

发明人： Akihide Sano ,  Eiichi Yamada ,  Takayuki Kobayashi ,  Koichi Ishihara ,  Yutaka Miyamoto ,  Riichi Kudo

IPC分类号： H04B10/06

CPC分类号： H04B10/69 ,  H04L25/0305 ,  H04L25/03159 ,  H04L27/2647 ,  H04L27/2697

摘要： A high-performance optical OFDM receiver is realized. A subcarrier separation circuit receives an optical OFDM signal consisting of two subcarriers A and B and separates a subcarrier component, signal light and first local oscillator light are input to the subcarrier separation circuit, the subcarrier separation circuit converts the signal light and the first local oscillator into a baseband electrical signal, the subcarrier separation circuit converts the baseband electrical signal into a digital signal, the subcarrier separation circuit shifts the frequency of the converted digital signal so that a center frequency of the subcarrier A becomes zero, and the subcarrier separation circuit adds a frequency shifted signal to a signal obtained by delaying the frequency shifted signal by ½ of a symbol time to separate a component of the subcarrier A.

摘要翻译： 实现了高性能的光OFDM接收机。 子载波分离电路接收由两个子载波A和B组成的光OFDM信号，并将子载波分量，信号光和第一本地振荡光分别输入到子载波分离电路，子载波分离电路将信号光和第一本机振荡器 子载波分离电路将基带电信号转换为数字信号，副载波分离电路将转换的数字信号的频率移位，使副载波A的中心频率为零，副载波分离电路相加 频移信号到通过将频移信号延迟1/2符号时间的1/2来获得的信号，以分离副载波A的分量。

公开(公告)号：US20120126100A1

公开(公告)日：2012-05-24

申请号：US13278231

申请日：2011-10-21

申请人： Koji Fukumura ,  Yutaka Miyamoto

发明人： Koji Fukumura ,  Yutaka Miyamoto

IPC分类号： G01J1/44

CPC分类号： G01V8/10 ,  H03K17/941

摘要： A photoelectric switch can be widely applied with a function to sensuously and intuitively display a light-receiving amount as an artificial numeric value in a given range. A preset display value “100” is set to an average value of sampled light-receiving amounts (S2). A preset display value “0” is allocated to a light-receiving amount of “0” already held by the photoelectric switch (S3), to obtain a preset display conversion factor (S4). When an operation based on this preset display conversion formula is disadvantageous, an average value of the sampled actual light-receiving amounts is set to a preset display value “0 (zero)” (S23), and a preset display conversion formula, obtained by substituting the above actual light-receiving amount for the light-receiving amount with respect to the preset display value “0” in the already created preset display conversion formula, is created (S22).

摘要翻译： 光电开关可以广泛地应用于在给定范围内以感官和直观地显示光接收量作为人为数值的功能。 将预设显示值“100”设定为采样光接收量的平均值（S2）。 预先设定的显示值“0”被分配给已经由光电开关（S3）保持的光接收量“0”，以获得预设的显示转换因子（S4）。 当基于该预设显示转换公式的操作是不利时，将采样的实际光接收量的平均值设置为预设显示值“0（零）”（S23），并将预设显示转换公式设置为 创建相对于已经创建的预设显示转换公式中的预设显示值“0”的上述实际光接收量代替光接收量（S22）。

公开(公告)号：US20120070159A1

公开(公告)日：2012-03-22

申请号：US13318757

申请日：2010-05-18

申请人： Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Masato Mizoguchi ,  Akihide Sano ,  Shogo Yamanaka ,  Etsushi Yamazaki ,  Yutaka Miyamoto ,  Eiji Yoshida ,  Tadao Nakagawa

发明人： Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Masato Mizoguchi ,  Akihide Sano ,  Shogo Yamanaka ,  Etsushi Yamazaki ,  Yutaka Miyamoto ,  Eiji Yoshida ,  Tadao Nakagawa

IPC分类号： H04B10/04 ,  H04J14/02 ,  H04B10/06 ,  H04B1/69

CPC分类号： H04B10/50 ,  H04B10/07951 ,  H04B10/2513 ,  H04B10/556 ,  H04B10/616 ,  H04B10/6161 ,  H04L7/027

摘要： To enable signal position detection, frequency offset compensation, clock offset compensation, and chromatic dispersion amount estimation in a communication system based on coherent detection using an optical signal, even on a signal having a great offset in an arrival time depending on a frequency due to chromatic dispersion. An optical signal transmitting apparatus generates specific frequency band signals having power concentrated on two or more specific frequencies and transmits a signal including the specific frequency band signals. An optical signal receiving apparatus converts a received signal into a digital signal, detects positions of the specific frequency band signals from the converted digital signal, estimates frequency positions of the detected specific frequency band signals, and detects a frequency offset between an optical signal receiving apparatus and an optical signal transmitting apparatus. Moreover, the optical signal receiving apparatus detects a clock offset between the optical signal receiving apparatus and the optical signal transmitting apparatus from an interval between the estimated frequency positions of the specific frequency band signals. Furthermore, the optical signal receiving apparatus estimates temporal positions of the detected specific frequency band signals and detects a chromatic dispersion amount from a difference between the temporal positions of the specific frequency band signals corresponding to different frequencies.

摘要翻译： 为了使基于使用光信号的相干检测的通信系统中的信号位置检测，频率偏移补偿，时钟偏移补偿和色散量估计，即使在到达时间上具有很大偏移的信号，这取决于由于 色散。 光信号发送装置产生具有集中在两个或更多个特定频率上的功率的特定频带信号，并发送包括特定频带信号的信号。 光信号接收装置将接收到的信号转换为数字信号，检测来自转换的数字信号的特定频带信号的位置，估计检测到的特定频带信号的频率位置，并检测光信号接收装置 和光信号发送装置。 此外，光信号接收装置从特定频带信号的估计频率位置之间的间隔检测光信号接收装置和光信号发送装置之间的时钟偏移。 此外，光信号接收装置估计检测到的特定频带信号的时间位置，并且根据与不同频率对应的特定频带信号的时间位置之间的差来检测色散量。

公开(公告)号：US20110129041A1

公开(公告)日：2011-06-02

申请号：US12994365

申请日：2009-06-19

申请人： Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Masato Mizoguchi ,  Akihide Sano ,  Eiichi Yamada ,  Etsushi Yamazaki ,  Yutaka Miyamoto ,  Hideyuki Nosaka

发明人： Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Masato Mizoguchi ,  Akihide Sano ,  Eiichi Yamada ,  Etsushi Yamazaki ,  Yutaka Miyamoto ,  Hideyuki Nosaka

IPC分类号： H04L27/06

CPC分类号： H04B7/084 ,  H04B7/0845 ,  H04L2027/0067

摘要： A receiver device receives a signal inputted to one or a plurality of ports as a plurality of received signals, and includes: a phase offset estimating unit that, on the basis of a unique word of each signal block contained in said received signal, estimates the phase offset, and a phase offset compensating unit that, on the basis of a phase offset estimated by said phase offset estimating unit, compensates the phase offset; the receiver device uses a known signal component (unique word) contained in a frequency-domain equalized signal to compensate the phase offset, whereby it compensates complex phase offset fluctuation, and estimates the phase offset of a signal obtained at each port.

摘要翻译： 接收机装置接收输入到一个或多个端口的信号作为多个接收信号，并且包括：相位偏移估计单元，其基于包含在所述接收信号中的每个信号块的唯一字，估计出 以及相位偏移补偿单元，其基于由所述相位偏移估计单元估计的相位偏移补偿相位偏移; 接收机设备使用包含在频域均衡信号中的已知信号分量（唯一字）来补偿相位偏移，从而补偿复相位偏移波动，并且估计在每个端口处获得的信号的相位偏移。

公开(公告)号：US20100252651A1

公开(公告)日：2010-10-07

申请号：US12752521

申请日：2010-04-01

申请人： Shu Kagami ,  Jun Kondo ,  Tomoki Fujino ,  Yutaka Miyamoto

发明人： Shu Kagami ,  Jun Kondo ,  Tomoki Fujino ,  Yutaka Miyamoto

IPC分类号： F02M61/16 ,  F02M61/00

CPC分类号： F02M65/003 ,  F02M47/027 ,  F02M51/005 ,  F02M57/005 ,  F02M2200/24

摘要： A fuel injection apparatus that includes a body, a nozzle, a pressure control unit, and a physical quantity measurement unit. The body has a fuel inlet port and a high-pressure fuel passage that is communicated with the fuel inlet port. The pressure control unit controls opening and closing of the nozzle. The fuel inlet port projects in a radially outward direction of the body. The body includes a fuel outlet port located on a lateral side of a longitudinal axis of the body opposite from the fuel inlet port. The physical quantity measurement unit is provided between the fuel inlet port and the fuel outlet port, and the physical quantity measurement unit measures a physical quantity of high pressure fuel introduced from the fuel inlet port.

摘要翻译： 一种燃料喷射装置，其包括主体，喷嘴，压力控制单元和物理量测量单元。 主体具有与燃料入口连通的燃料入口和高压燃料通道。 压力控制单元控制喷嘴的打开和关闭。 燃料入口端口沿着身体的径向向外的方向突出。 主体包括位于与燃料入口相对的主体的纵向轴线的侧面上的燃料出口。 物理量测量单元设置在燃料入口和燃料出口之间，物理量测量单元测量从燃料入口导入的高压燃料的物理量。

公开(公告)号：US20100252002A1

公开(公告)日：2010-10-07

申请号：US12753339

申请日：2010-04-02

申请人： Tomoki Fujino ,  Jun Kondo ,  Yutaka Miyamoto

发明人： Tomoki Fujino ,  Jun Kondo ,  Yutaka Miyamoto

IPC分类号： F02M51/00 ,  B23P17/04

CPC分类号： F02M57/005 ,  F02M47/027 ,  F02M51/005 ,  F02M61/168 ,  F02M2200/80 ,  F02M2200/8076 ,  Y10T29/494

摘要： In a fuel injector, a body has formed therein a spray hole and a fuel supply passage. Fuel supplied to the fuel supply passage is delivered to the spray hole. A fuel pressure sensor produces a signal indicative of a pressure of the fuel. First terminals are attached to the fuel pressure sensor, and include a terminal for outputting the signal. The fuel pressure sensor is threadedly installed in the body while the plurality of first terminals are rotated about a preset axis. A connector includes a housing attached to the body, and second terminals supported by the housing for external electric connection of the fuel pressure sensor. Electrodes are each arranged to extend around the preset axis in a circular arc. Each of the electrodes electrically connects a corresponding one of the first terminals to a corresponding one of the second terminals.

摘要翻译： 在燃料喷射器中，主体在其中形成有喷射孔和燃料供给通道。 供给燃料供给通道的燃料被输送到喷射孔。 燃料压力传感器产生指示燃料压力的信号。 第一端子附接到燃料压力传感器，并且包括用于输出信号的端子。 燃料压力传感器螺纹地安装在主体中，同时多个第一端子围绕预设轴线旋转。 连接器包括附接到主体的壳体和由壳体支撑的用于燃料压力传感器的外部电连接的第二端子。 电极各自布置成围绕预设轴线以圆弧延伸。 每个电极将相应的一个第一端子电连接到相应的一个第二端子。