公开(公告)号：US09160600B2

公开(公告)日：2015-10-13

申请号：US13381114

申请日：2010-07-15

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

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

IPC分类号： H04B1/10 ,  H04L27/26 ,  H04L25/03

CPC分类号： H04L27/2672 ,  H04L25/03159 ,  H04L27/2633 ,  H04L27/265 ,  H04L27/266 ,  H04L2025/03414

摘要： A frequency domain multiplexed signal receiving method which decodes received signals that are multiplexed in a frequency domain, includes: a digital signal acquisition step of acquiring digital signals from the received signals that are multiplexed in the frequency domain; an offset discrete Fourier transform step of applying an offset discrete Fourier transform to odd discrete point numbers based on the acquired digital signals; and a decode step of decoding frequency domain digital signals in the frequency domain obtained by the offset discrete Fourier transform, and that are the frequency domain digital signals of one or more frequency channels.

摘要翻译： 一种频域复用信号接收方法，对在频域中被复用的接收信号进行解码，包括：数字信号获取步骤，从在频域中复用的接收信号中获取数字信号; 偏移离散傅立叶变换步骤，基于所获取的数字信号将偏移离散付里叶变换应用于奇数离散点数; 以及解码步骤，对通过偏移离散付里叶变换获得的频域中的频域数字信号进行解码，并且其是一个或多个频率信道的频域数字信号。

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：US08488696B2

公开(公告)日：2013-07-16

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： H04K1/10

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：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：US20110002689A1

公开(公告)日：2011-01-06

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： H04J14/04 ,  H04B10/06 ,  H04J14/06

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：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：US20130308960A1

公开(公告)日：2013-11-21

申请号：US13983233

申请日：2012-02-07

申请人： Kengo Horikoshi ,  Etsushi Yamazaki ,  Takayuki Kobayashi ,  Eiji Yoshida ,  Yutaka Miyamoto

发明人： Kengo Horikoshi ,  Etsushi Yamazaki ,  Takayuki Kobayashi ,  Eiji Yoshida ,  Yutaka Miyamoto

IPC分类号： H04B1/10

CPC分类号： H04B1/10 ,  H03H21/0012 ,  H03H2021/0092 ,  H04B10/616 ,  H04L25/03261

摘要： A parameter of an adaptive filter is optimized so that inter-symbol interference having an amount corresponding to an inserted fixed filter remains. A digital signal processing apparatus which is included in an optical signal receiver and processes a digital signal converted from an optical signal is provided with: a linear adaptive filter which applies a dynamically controllable linear transfer function to the digital signal; a maximum likelihood sequence decoder which applies a transfer function of a transmission-path model to a plurality of signal sequence candidates to generate a plurality of reference signals, and decodes a reception signal using maximum likelihood sequence estimation which evaluates the differences between an output signal of the linear adaptive filter and the reference signals to estimate the most likely transmission time sequence; a signal regenerator which generates a signal corresponding to decoded data from the maximum likelihood sequence decoder; a feedback distortion adding filter which adds distortion that is equivalent to the transmission-path model used in the maximum likelihood sequence decoder to an output signal of the signal regenerator; and an adaptive equalization filter control block which updates a tap coefficient of the linear adaptive filter in accordance with an LMS algorithm using the difference between a target signal that is an output signal of the feedback distortion adding filter and the digital signal as an error signal.

摘要翻译： 对自适应滤波器的参数进行优化，使得具有与插入的固定滤波器相对应的量的符号间干扰保留。 包括在光信号接收机中并处理从光信号转换的数字信号的数字信号处理装置具有：向数字信号施加动态可控线性传递函数的线性自适应滤波器; 最大似然序列解码器，其将传输路径模型的传递函数应用于多个信号序列候选以产生多个参考信号，并且使用最大似然序列估计解码接收信号，所述最大似然序列估计用于评估接收信号的输出信号 线性自适应滤波器和参考信号来估计最可能的传输时间序列; 信号再生器，其生成对应于来自最大似然序列解码器的解码数据的信号; 将与最大似然序列解码器中使用的传输路径模型相当的失真与信号再生器的输出信号相加的反馈失真相加滤波器; 以及自适应均衡滤波器控制块，其使用作为反馈失真相加滤波器的输出信号的目标信号和数字信号之间的差作为误差信号，根据LMS算法来更新线性自适应滤波器的抽头系数。

公开(公告)号：US08977141B2

公开(公告)日：2015-03-10

申请号：US13983233

申请日：2012-02-07

申请人： Kengo Horikoshi ,  Etsushi Yamazaki ,  Takayuki Kobayashi ,  Eiji Yoshida ,  Yutaka Miyamoto

发明人： Kengo Horikoshi ,  Etsushi Yamazaki ,  Takayuki Kobayashi ,  Eiji Yoshida ,  Yutaka Miyamoto

IPC分类号： H04B10/06 ,  H04B1/10 ,  H03H21/00 ,  H04B10/61 ,  H04L25/03 ,  H04B10/00

CPC分类号： H04B1/10 ,  H03H21/0012 ,  H03H2021/0092 ,  H04B10/616 ,  H04L25/03261

摘要： A parameter of an adaptive filter is optimized so that inter-symbol interference having an amount corresponding to an inserted fixed filter remains. A digital signal processing apparatus which is included in an optical signal receiver and processes a digital signal converted from an optical signal is provided with: a linear adaptive filter which applies a dynamically controllable linear transfer function to the digital signal; a maximum likelihood sequence decoder which applies a transfer function of a transmission-path model to a plurality of signal sequence candidates to generate a plurality of reference signals, and decodes a reception signal using maximum likelihood sequence estimation which evaluates the differences between an output signal of the linear adaptive filter and the reference signals to estimate the most likely transmission time sequence; a signal regenerator which generates a signal corresponding to decoded data from the maximum likelihood sequence decoder; a feedback distortion adding filter which adds distortion that is equivalent to the transmission-path model used in the maximum likelihood sequence decoder to an output signal of the signal regenerator; and an adaptive equalization filter control block which updates a tap coefficient of the linear adaptive filter in accordance with an LMS algorithm using the difference between a target signal that is an output signal of the feedback distortion adding filter and the digital signal as an error signal.

摘要翻译： 对自适应滤波器的参数进行优化，使得具有与插入的固定滤波器相对应的量的符号间干扰保留。 包括在光信号接收机中并处理从光信号转换的数字信号的数字信号处理装置具有：向数字信号施加动态可控线性传递函数的线性自适应滤波器; 最大似然序列解码器，其将传输路径模型的传递函数应用于多个信号序列候选以产生多个参考信号，并且使用最大似然序列估计解码接收信号，所述最大似然序列估计用于评估接收信号的输出信号 线性自适应滤波器和参考信号来估计最可能的传输时间序列; 信号再生器，其生成对应于来自最大似然序列解码器的解码数据的信号; 将与最大似然序列解码器中使用的传输路径模型相当的失真与信号再生器的输出信号相加的反馈失真相加滤波器; 以及自适应均衡滤波器控制块，其使用作为反馈失真相加滤波器的输出信号的目标信号和数字信号之间的差作为误差信号，根据LMS算法更新线性自适应滤波器的抽头系数。

公开(公告)号：US08437638B2

公开(公告)日：2013-05-07

申请号：US12664745

申请日：2008-07-04

申请人： Takayuki Kobayashi ,  Akihide Sano ,  Yutaka Miyamoto

发明人： Takayuki Kobayashi ,  Akihide Sano ,  Yutaka Miyamoto

IPC分类号： H04B10/04 ,  H04J14/02

CPC分类号： H04B10/5053 ,  G02F1/0327 ,  G02F1/225 ,  H04B10/548 ,  H04B10/5561

摘要： An optical modulator and an optical transmission system convert continuous light of a multiple wavelength light source, which generates the continuous light with a fixed and complete phase but different frequencies, to a modulator driving signal so as to generate a light subcarrier with each frequency at the center and modulate the continuous light to the light subcarrier by using the modulator driving signal. In the case where an optical modulation is carried out by an optical IQ-modulator, transmitting data, for example, is converted to two parallel data A(t) and B(t), an I phase signal, in which the data A(t)+B(t) are modulated with a clock signal with a frequency ω, and a Q phase signal, in which the data A(t)−B(t) are modulated with a clock signal with a π/2 phase shifted, are generated, and the I phase signal and the Q phase signal are applied to electrodes of the optical IQ-modulator, respectively.

摘要翻译： 光调制器和光传输系统将连续的光转换成多波长光源，其将具有固定且完全相位但不同频率的连续光产生到调制器驱动信号，以便产生具有每个频率的光副载波 通过使用调制器驱动信号将连续光调制到光副载波上。 在通过光学IQ调制器进行光学调制的情况下，例如将数据转换为两个并行数据A（t）和B（t），其中数据A（ t）+ B（t）用具有频率ω的时钟信号和Q相信号进行调制，其中数据A（t）-B（t）用具有pi / 2相移的时钟信号 ，并且将I相信号和Q相信号分别施加到光学IQ调制器的电极。

公开(公告)号：US20100220376A1

公开(公告)日：2010-09-02

申请号：US12664745

申请日：2008-07-04

申请人： Takayuki Kobayashi ,  Akihide Sano ,  Yutaka Miyamoto

发明人： Takayuki Kobayashi ,  Akihide Sano ,  Yutaka Miyamoto

IPC分类号： G02B26/00

CPC分类号： H04B10/5053 ,  G02F1/0327 ,  G02F1/225 ,  H04B10/548 ,  H04B10/5561

摘要： An optical modulator and an optical transmission system convert continuous light of a multiple wavelength light source, which generates the continuous light with a fixed and complete phase but different frequencies, to a modulator driving signal so as to generate a light subcarrier with each frequency at the center and modulate the continuous light to the light subcarrier by using the modulator driving signal. In the case where an optical modulation is carried out by an optical IQ-modulator, transmitting data, for example, is converted to two parallel data A(t) and B(t), an I phase signal, in which the data A(t)+B(t) are modulated with a clock signal with a frequency ω, and a Q phase signal, in which the data A(t)−B(t) are modulated with a clock signal with a π/2 phase shifted, are generated, and the I phase signal and the Q phase signal are applied to electrodes of the optical IQ-modulator, respectively.

摘要翻译： 光调制器和光传输系统将连续的光转换成多波长光源，其将具有固定且完全相位但不同频率的连续光产生到调制器驱动信号，以便产生具有每个频率的光副载波 通过使用调制器驱动信号将连续光调制到光副载波上。 在通过光学IQ调制器进行光学调制的情况下，例如将数据转换为两个并行数据A（t）和B（t），其中数据A（ t）+ B（t）用具有频率ω的时钟信号和Q相信号进行调制，其中数据A（t）-B（t）用具有＆pgr / 2相位的时钟信号 产生偏移，I相信号和Q相信号分别施加到光学IQ调制器的电极。