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：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：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：US20120315043A1

公开(公告)日：2012-12-13

申请号：US13576902

申请日：2011-02-03

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

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

IPC分类号： H04J14/06

CPC分类号： H04B10/5053 ,  G02F1/0136 ,  H04B10/532 ,  H04B10/60 ,  H04J14/06

摘要： A polarization state of a transmission signal can be changed at a high speed based on a symbol-rate By switching a first switch, a second switch, and a third switch with time, one of an X-polarized wave_I-signal as a Y-polarized wave_I-signal, a signal caused by performing logical inversion for an X-polarized wave_I-signal, an X-polarized wave_Q-signal and a signal caused by logical inversion for an X-polarized wave_Q-signal is input to a second modulator. Further, by switching the first switch, the second switch and the third switch with time, the second modulator is input one of the X-polarized wave_I-signal as the Y-polarized wave_Q-signal, the X-polarized wave_I-signal, the signal caused by performing logical inversion for the X-polarized wave_I-signal, the X-polarized wave_Q-signal and the signal caused by performing logical inversion for the X-polarized wave_Q-signal. Thereby, a polarization state of a transmission signal can be changed at high speed based on a symbol-rate speed.

摘要翻译： 传输信号的极化状态可以基于符号速率高速度地改变。通过随时间切换第一开关，第二开关和第三开关，X极化波I_信号之一作为Y轴， 通过对X偏振波_I信号执行逻辑反相，X偏振波Q_信号和由X偏振波Q_信号的逻辑反相引起的信号引起的信号被输入到第二调制器。 此外，通过随时间切换第一开关，第二开关和第三开关，第二调制器输入X极化波I_信号之一作为Y偏振波Q_信号，X偏振波I信号， 通过对X偏振波_I信号进行逻辑反转而引起的信号，X偏振波Q信号和由X偏振波Q信号执行逻辑反相引起的信号。 因此，可以基于符号速率速度高速地改变发送信号的偏振状态。

公开(公告)号：US08781029B2

公开(公告)日：2014-07-15

申请号：US13701963

申请日：2011-06-17

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

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

IPC分类号： H03K9/10 ,  H04L17/14

CPC分类号： H04L27/14 ,  H04B7/10 ,  H04B10/611 ,  H04B10/6164 ,  H04B17/327 ,  H04L27/2659 ,  H04L2027/0026 ,  H04L2027/0032 ,  H04L2027/0046

摘要： Provided is a frequency offset estimation apparatus that appropriately estimates and compensates for a frequency offset of a received signal when estimating the frequency offset which is the difference between a carrier frequency of the received signal and the frequency of an output signal of a local oscillator. The frequency offset estimation apparatus converts the received signal sampled in advance with a predetermined sampling frequency into a frequency spectrum having N frequency components, limits a frequency band of negative frequency components from 1 to N/2 of the frequency spectrum and a frequency band of positive frequency components from N/2+1 to N of the frequency spectrum, calculates the sum of the squares of the positive frequency components of the frequency spectrum that have been subjected to frequency band limitation and the sum of the squares of the negative frequency components of the frequency spectrum that have been subjected to frequency band limitation to calculate power of the positive frequency components and power of the negative frequency components, and cyclically shifts all frequency components of the frequency spectrum in a frequency domain until the absolute value of a power difference between the power of the positive frequency components and the power of the negative frequency components is less than or equal to a predetermined threshold value, and estimates the frequency offset based on a shift amount until the absolute value is less than or equal to the threshold value.

摘要翻译： 提供一种频率偏移估计装置，其在估计作为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的频率偏移时，适当地估计和补偿接收信号的频率偏移。 频率偏移估计装置将预先采样的接收信号以预定的采样频率转换成具有N个频率分量的频谱，将频谱的负频率分量的频带从1到N / 2限制，并且频带为正 频率分量从频谱的N / 2 + 1到N的频率分量计算已经经受频带限制的频谱的正频率分量的平方和的和的频率分量的平方和之和 已经进行了频带限制的频谱，以计算正频率分量的功率和负频率分量的功率，并且循环移位频域中的频谱的所有频率分量，直到频域中的频差的绝对值 正频率分量的功率和ne的功率 同步频率分量小于或等于预定阈值，并且基于偏移量来估计频率偏移，直到绝对值小于或等于阈值。

公开(公告)号：US20130070874A1

公开(公告)日：2013-03-21

申请号：US13701963

申请日：2011-06-17

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

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

IPC分类号： H04L27/14

CPC分类号： H04L27/14 ,  H04B7/10 ,  H04B10/611 ,  H04B10/6164 ,  H04B17/327 ,  H04L27/2659 ,  H04L2027/0026 ,  H04L2027/0032 ,  H04L2027/0046

摘要： Provided is a frequency offset estimation apparatus that appropriately estimates and compensates for a frequency offset of a received signal when estimating the frequency offset which is the difference between a carrier frequency of the received signal and the frequency of an output signal of a local oscillator. The frequency offset estimation apparatus converts the received signal sampled in advance with a predetermined sampling frequency into a frequency spectrum having N frequency components, limits a frequency band of negative frequency components from 1 to N/2 of the frequency spectrum and a frequency band of positive frequency components from N/2+1 to N of the frequency spectrum, calculates the sum of the squares of the positive frequency components of the frequency spectrum that have been subjected to frequency band limitation and the sum of the squares of the negative frequency components of the frequency spectrum that have been subjected to frequency band limitation to calculate power of the positive frequency components and power of the negative frequency components, and cyclically shifts all frequency components of the frequency spectrum in a frequency domain until the absolute value of a power difference between the power of the positive frequency components and the power of the negative frequency components is less than or equal to a predetermined threshold value, and estimates the frequency offset based on a shift amount until the absolute value is less than or equal to the threshold value.

摘要翻译： 提供一种频率偏移估计装置，其在估计作为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的频率偏移时，适当地估计和补偿接收信号的频率偏移。 频率偏移估计装置将预先采样的接收信号以预定的采样频率转换成具有N个频率分量的频谱，将频谱的负频率分量的频带从1到N / 2限制，并且频带为正 频率分量从频谱的N / 2 + 1到N的频率分量计算已经经受频带限制的频谱的正频率分量的平方和的和的频率分量的平方和之和 已经经过频带限制的频谱，以计算正频率分量的功率和负频率分量的功率，并且循环移位频域中的频谱的所有频率分量，直到频域中的功率差的绝对值 正频率分量的功率和ne的功率 同步频率分量小于或等于预定阈值，并且基于偏移量来估计频率偏移，直到绝对值小于或等于阈值。

公开(公告)号：US20120106618A1

公开(公告)日：2012-05-03

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： H04L27/06 ,  H04L27/01

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：US08934782B2

公开(公告)日：2015-01-13

申请号：US13576902

申请日：2011-02-03

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

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

IPC分类号： H04B10/00 ,  H04J14/06 ,  H04B10/532 ,  H04B10/50 ,  H04B10/60 ,  G02F1/01

CPC分类号： H04B10/5053 ,  G02F1/0136 ,  H04B10/532 ,  H04B10/60 ,  H04J14/06

摘要： A polarization state of a transmission signal can be changed at a high speed based on a symbol-rate By switching a first switch, a second switch, and a third switch with time, one of an X-polarized wave_I-signal as a Y-polarized wave_I-signal, a signal caused by performing logical inversion for an X-polarized wave_I-signal, an X-polarized wave_Q-signal and a signal caused by logical inversion for an X-polarized wave_Q-signal is input to a second modulator. Further, by switching the first switch, the second switch and the third switch with time, the second modulator is input one of the X-polarized wave_I-signal as the Y-polarized wave_Q-signal, the X-polarized wave_I-signal, the signal caused by performing logical inversion for the X-polarized wave_I-signal, the X-polarized wave_Q-signal and the signal caused by performing logical inversion for the X-polarized wave_Q-signal. Thereby, a polarization state of a transmission signal can be changed at high speed based on a symbol-rate speed.

摘要翻译： 传输信号的极化状态可以基于符号速率高速度地改变。通过随时间切换第一开关，第二开关和第三开关，X极化波I_信号之一作为Y轴， 通过对X偏振波_I信号执行逻辑反相，X偏振波Q_信号和由X偏振波Q_信号的逻辑反相引起的信号引起的信号被输入到第二调制器。 此外，通过随时间切换第一开关，第二开关和第三开关，第二调制器输入X极化波I_信号之一作为Y偏振波Q_信号，X偏振波I信号， 通过对X偏振波_I信号进行逻辑反转而引起的信号，X偏振波Q信号和由X偏振波Q信号执行逻辑反相引起的信号。 因此，可以基于符号速率速度高速地改变发送信号的偏振状态。

公开(公告)号：US20120099864A1

公开(公告)日：2012-04-26

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： H04J14/06 ,  H04B10/00

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。