公开(公告)号：US20110243331A1

公开(公告)日：2011-10-06

申请号：US13133844

申请日：2009-12-03

申请人： Wakako Yasuda ,  Akio Tajima ,  Akihiro Tanaka ,  Seigo Takahashi

发明人： Wakako Yasuda ,  Akio Tajima ,  Akihiro Tanaka ,  Seigo Takahashi

IPC分类号： H04L9/08 ,  H04L9/00

CPC分类号： H04L9/0662 ,  H04L9/0836 ,  H04L9/0852

摘要： In a secret communication network including a center node and multiple remote nodes, the center node is provided with a virtual remote node which functions as a remote node similar to each of the remote nodes. Random numbers shared between the center node and each remote node are managed based on random number sequences used in cipher communication between the virtual remote node and one of the remote nodes.

摘要翻译： 在包括中心节点和多个远程节点的秘密通信网络中，中心节点设置有虚拟远程节点，其作为与每个远程节点类似的远程节点。 基于在虚拟远程节点和远程节点之间的密码通信中使用的随机数序列来管理中心节点和每个远程节点之间共享的随机数。

公开(公告)号：US20120045208A1

公开(公告)日：2012-02-23

申请号：US13138958

申请日：2010-04-21

申请人： Wakako Yasuda ,  Daisaku Ogasahara ,  Kiyoshi Fukuchi

发明人： Wakako Yasuda ,  Daisaku Ogasahara ,  Kiyoshi Fukuchi

IPC分类号： H04J14/06

CPC分类号： H04B10/611 ,  H04B10/60 ,  H04B10/6166 ,  H04L27/223

摘要： A coherent receiver 1 assigns a first transmission signal to first transmission polarization, assigns a second transmission signal to second transmission polarization, and receives a quadrature multiplexed signal formed by applying quadrature multiplexing to the first transmission polarization and the second transmission polarization. The coherent receiver includes a detection means 10 for detecting the first transmission polarization and the second transmission polarization according to prescribed first reception polarization and second reception polarization and obtaining a first detected signal and a second detected signal; a quantization means 20 for quantizing the first detected signal and the second detected signal and obtaining a first quantized signal and a second quantized signal; and a signal processing means 30 for, when filtering the first quantized signal and the second quantized signal using a prescribed filtering control algorithm to form a first demodulated signal and a second demodulated signal respectively, adjusting filter coefficients of the filtering control algorithm according to the first quantized signal and the second quantized signal and the first demodulated signal and the second demodulated signal, and outputting the first demodulated signal and the second demodulated signal to a first output terminal and a second output terminal, respectively.

摘要翻译： 相干接收机1将第一传输信号分配给第一传输极化，将第二传输信号分配给第二传输极化，并且接收通过对第一透射偏振和第二透射偏振应用正交多路复用形成的正交多路复用信号。 相干接收机包括：检测装置10，用于根据规定的第一接收极化和第二接收极化检测第一透射偏振和第二透射偏振，并获得第一检测信号和第二检测信号; 量化装置20，用于量化第一检测信号和第二检测信号，并获得第一量化信号和第二量化信号; 以及信号处理装置30，用于当使用规定的滤波控制算法对第一量化信号和第二量化信号进行滤波以分别形成第一解调信号和第二解调信号时，根据第一信号调整滤波器控制算法的滤波器系数 量化信号和第二量化信号以及第一解调信号和第二解调信号，并将第一解调信号和第二解调信号分别输出到第一输出端和第二输出端。

公开(公告)号：US09686019B2

公开(公告)日：2017-06-20

申请号：US13995279

申请日：2011-12-16

申请人： Kiyoshi Fukuchi ,  Junichi Abe ,  Wakako Yasuda

发明人： Kiyoshi Fukuchi ,  Junichi Abe ,  Wakako Yasuda

IPC分类号： H04B10/61

CPC分类号： H04B10/616

摘要： The disclosed coherent optical receiver includes a local light source; a 90-degree hybrid circuit; an optoelectronic converter; an analog-to-digital converter; a skew addition unit; and a FFT operation unit. The 90-degree hybrid circuit makes multiplexed signal light interfere with local light from the local light source, and outputs multiple optical signals separated into a plurality of signal components. The optoelectronic converter detects the optical signal and outputs a detected electrical signal. The analog-to-digital converter digitizes the detected electrical signal and outputs a detected digital signal. The skew addition unit adds to the detected digital signal an additional skew amount whose absolute value is equal to, whose sign is opposite to a skew amount of a difference in propagation delay in each lane connected to each output channel of the 90-degree hybrid circuit. The FFT operation unit performs a fast Fourier transform on the output from the skew addition unit.

公开(公告)号：US09088370B2

公开(公告)日：2015-07-21

申请号：US14577007

申请日：2014-12-19

申请人： Junichi Abe ,  Wakako Yasuda ,  Kiyoshi Fukuchi

发明人： Junichi Abe ,  Wakako Yasuda ,  Kiyoshi Fukuchi

IPC分类号： H04B10/00 ,  H04B10/61

CPC分类号： H04B10/616 ,  H04B10/0775 ,  H04B10/6164 ,  H04B10/6165

摘要： In a coherent optical receiver, sufficient demodulation becomes impossible and consequently receiving performance deteriorates if an inter-channel skew arises, therefore, a coherent optical receiver according to an exemplary aspect of the invention includes a local light source, a 90° hybrid circuit, an optoelectronic converter, an analog to digital converter, and a digital signal processing unit; wherein the 90° hybrid circuit makes multiplexed signal light interfere with local light from the local light source, and outputs a plurality of optical signals separated into a plurality of signal components; the optoelectronic converter detects the optical signals and outputs detected electrical signals; the analog to digital converter quantizes the detected electrical signals and outputs quantized signals; the digital signal processing unit includes a skew compensation unit for compensating a difference in propagation delay between the plurality of signal components, and an FFT operation unit for performing a fast Fourier transform process on the quantized signals; and wherein the difference in propagation delay is calculated on the basis of a plurality of peak values with a central focus on one peak value in the results of performing the fast Fourier transform process.

摘要翻译： 在相干光接收机中，如果发生信道间偏斜，则不可能进行足够的解调，因此接收性能恶化，因此，根据本发明的示例性方面的相干光接收机包括本地光源，90°混合电路， 光电转换器，模数转换器和数字信号处理单元; 其中所述90°混合电路使多路复用信号光干扰来自所述本地光源的局部光，并且输出分离成多个信号分量的多个光信号; 光电转换器检测光信号并输出​​检测到的电信号; 模数转换器对检测到的电信号进行量化并输出量化信号; 数字信号处理单元包括用于补偿多个信号分量之间的传播延迟差的偏斜补偿单元和用于对量化信号执行快速傅里叶变换处理的FFT运算单元; 并且其中基于执行快速傅里叶变换处理的结果中的中心聚焦于一个峰值的多个峰值来计算传播延迟的差异。

公开(公告)号：US08515293B2

公开(公告)日：2013-08-20

申请号：US13138958

申请日：2010-04-21

申请人： Wakako Yasuda ,  Daisaku Ogasahara ,  Kiyoshi Fukuchi

发明人： Wakako Yasuda ,  Daisaku Ogasahara ,  Kiyoshi Fukuchi

IPC分类号： H04B10/06

CPC分类号： H04B10/611 ,  H04B10/60 ,  H04B10/6166 ,  H04L27/223

摘要： A coherent receiver 1 assigns a first transmission signal to first transmission polarization, assigns a second transmission signal to second transmission polarization, and receives a quadrature multiplexed signal formed by applying quadrature multiplexing to the first transmission polarization and the second transmission polarization. The coherent receiver includes a detection means 10 for detecting the first transmission polarization and the second transmission polarization according to prescribed first reception polarization and second reception polarization and obtaining a first detected signal and a second detected signal; a quantization means 20 for quantizing the first detected signal and the second detected signal and obtaining a first quantized signal and a second quantized signal; and a signal processing means 30 for, when filtering the first quantized signal and the second quantized signal using a prescribed filtering control algorithm to form a first demodulated signal and a second demodulated signal respectively, adjusting filter coefficients of the filtering control algorithm according to the first quantized signal and the second quantized signal and the first demodulated signal and the second demodulated signal, and outputting the first demodulated signal and the second demodulated signal to a first output terminal and a second output terminal, respectively.

摘要翻译： 相干接收机1将第一传输信号分配给第一传输极化，将第二传输信号分配给第二传输极化，并且接收通过对第一透射偏振和第二透射偏振应用正交多路复用形成的正交多路复用信号。 相干接收机包括检测装置10，用于根据规定的第一接收极化和第二接收极化检测第一透射偏振和第二透射偏振，并获得第一检测信号和第二检测信号; 量化装置20，用于量化第一检测信号和第二检测信号，并获得第一量化信号和第二量化信号; 以及信号处理装置30，用于当使用规定的滤波控制算法对第一量化信号和第二量化信号进行滤波以分别形成第一解调信号和第二解调信号时，根据第一信号调整滤波器控制算法的滤波器系数 量化信号和第二量化信号以及第一解调信号和第二解调信号，并将第一解调信号和第二解调信号分别输出到第一输出端和第二输出端。

公开(公告)号：US08953953B2

公开(公告)日：2015-02-10

申请号：US14082875

申请日：2013-11-18

申请人： Junichi Abe ,  Wakako Yasuda ,  Kiyoshi Fukuchi

发明人： Junichi Abe ,  Wakako Yasuda ,  Kiyoshi Fukuchi

IPC分类号： H04B10/00 ,  H04B10/61 ,  H04B10/077

CPC分类号： H04B10/616 ,  H04B10/0775 ,  H04B10/6164 ,  H04B10/6165

摘要： In a coherent optical receiver, sufficient demodulation becomes impossible and consequently receiving performance deteriorates if an inter-channel skew arises, therefore, a method for detecting inter-channel skew in a coherent optical receiver according to an exemplary aspect of the invention includes the steps of: outputting a plurality of optical signals separated into a plurality of signal components by making a test light from a test light source interfere with a local light from a local light source; detecting the optical signals and outputting detected electrical signals; quantizing the detected electrical signals and outputting quantized signals; performing a fast Fourier transform process on the quantized signals; and calculating a difference in propagation delay between the plurality of signal components on the basis of a plurality of peak values in the results of performing the fast Fourier transform process.

摘要翻译： 在相干光接收机中，如果出现信道间偏移，则不能进行足够的解调，因此接收性能恶化，因此根据本发明的示例性方面的用于检测相干光接收机中的信道间偏移的方法包括以下步骤： 通过使来自测试光源的测试光与本地光源的局部光干扰而输出分离成多个信号分量的多个光信号; 检测光信号并输出​​检测到的电信号; 量化检测到的电信号并输出​​量化信号; 对量化信号执行快速傅立叶变换处理; 以及基于执行快速傅立叶变换处理的结果中的多个峰值来计算多个信号分量之间的传播延迟的差异。

公开(公告)号：US08634727B2

公开(公告)日：2014-01-21

申请号：US13696516

申请日：2011-05-13

申请人： Wakako Yasuda ,  Junichi Abe ,  Kiyoshi Fukuchi

发明人： Wakako Yasuda ,  Junichi Abe ,  Kiyoshi Fukuchi

IPC分类号： H04B10/06

CPC分类号： H04B10/616 ,  H04B10/6151 ,  H04J14/02 ,  H04J14/06

摘要： In a coherent optical receiver, sufficient demodulation becomes impossible and consequently receiving performance deteriorates if an interchannel skew arises, therefore, a coherent optical receiver according to an exemplary aspect of the invention includes a local light source; a 90-degree hybrid circuit; an optoelectronic converter; an analog-to-digital converter; and a digital signal processing unit, wherein the 90-degree hybrid circuit makes multiplexed signal light interfere with local light from the local light source, and outputs a plurality of optical signals separated into a plurality of signal components; the optoelectronic converter detects the optical signals and outputs detected electrical signals; the analog-to-digital converter quantizes the detected electrical signals and outputs quantized signals; and the digital signal processing unit includes a skew compensation unit for compensating a difference in propagation delay between the plurality of signal components, and a demodulation unit for demodulating the quantized signals.

摘要翻译： 在相干光接收机中，如果出现通道间偏斜，则不能进行足够的解调，因此接收性能恶化，因此根据本发明的示例性方面的相干光接收机包括本地光源; 90度混合电路; 光电转换器; 一个模拟 - 数字转换器; 以及数字信号处理单元，其中所述90度混合电路使多路复用信号光干扰来自所述本地光源的局部光，并且输出分离成多个信号分量的多个光信号; 光电转换器检测光信号并输出​​检测到的电信号; 模数转换器对检测到的电信号进行量化并输出量化信号; 并且数字信号处理单元包括用于补偿多个信号分量之间的传播延迟差的偏斜补偿单元和用于解调量化信号的解调单元。

公开(公告)号：US08626000B2

公开(公告)日：2014-01-07

申请号：US13505199

申请日：2011-09-02

申请人： Junichi Abe ,  Wakako Yasuda ,  Kiyoshi Fukuchi

发明人： Junichi Abe ,  Wakako Yasuda ,  Kiyoshi Fukuchi

IPC分类号： H04B10/00 ,  H04B10/61

CPC分类号： H04B10/616 ,  H04B10/0775 ,  H04B10/6164 ,  H04B10/6165

摘要： In a coherent optical receiver, sufficient demodulation becomes impossible and consequently receiving performance deteriorates if an inter-channel skew arises, therefore, a coherent optical receiver according to an exemplary aspect of the invention includes a local light source, a 90° hybrid circuit, an optoelectronic converter, an analog to digital converter, and a digital signal processing unit; wherein the 90° hybrid circuit makes multiplexed signal light interfere with local light from the local light source, and outputs a plurality of optical signals separated into a plurality of signal components; the optoelectronic converter detects the optical signals and outputs detected electrical signals; the analog to digital converter quantizes the detected electrical signals and outputs quantized signals; the digital signal processing unit includes a skew compensation unit for compensating a difference in propagation delay between the plurality of signal components, and an FFT operation unit for performing a fast Fourier transform process on the quantized signals; and wherein the difference in propagation delay is calculated on the basis of a plurality of peak values with a central focus on one peak value in the results of performing the fast Fourier transform process.

摘要翻译： 在相干光接收机中，如果发生信道间偏斜，则不可能进行足够的解调，因此接收性能恶化，因此，根据本发明的示例性方面的相干光接收机包括本地光源，90°混合电路， 光电转换器，模数转换器和数字信号处理单元; 其中所述90°混合电路使多路复用信号光干扰来自所述本地光源的局部光，并且输出分离成多个信号分量的多个光信号; 光电转换器检测光信号并输出​​检测到的电信号; 模数转换器对检测到的电信号进行量化并输出量化信号; 数字信号处理单元包括用于补偿多个信号分量之间的传播延迟差的偏斜补偿单元和用于对量化信号执行快速傅里叶变换处理的FFT运算单元; 并且其中基于执行快速傅里叶变换处理的结果中的中心聚焦于一个峰值的多个峰值来计算传播延迟的差异。

公开(公告)号：US20120082464A1

公开(公告)日：2012-04-05

申请号：US13377878

申请日：2010-12-24

申请人： Wakako Yasuda ,  Kiyoshi Fukuchi ,  Daisaku Ogasahara

发明人： Wakako Yasuda ,  Kiyoshi Fukuchi ,  Daisaku Ogasahara

IPC分类号： H04B10/00 ,  H04B10/06

CPC分类号： H04B10/6166 ,  H04B10/0799 ,  H04B10/611 ,  H04B10/614

摘要： With respect to a coherent optical receiving apparatus, a polarization multiplexing light signal, whereupon a first signal is placed upon a first polarized wave light and a second signal is placed upon a second polarized wave light, is polarization divided upon the transmitting side thereof, and the first signal and the second signal cannot be received in correspondence with the transmitting side. Accordingly, disclosed is a coherent optical receiving apparatus, comprising a coherent light receiving unit that detects coherent light, and a signal processing unit that carries out signal processing that is set with control coefficients. The coherent light receiving unit receives a first polarized light that is modulated with a first transmitted signal and outputs a first detected signal, and simultaneously receives the first polarized light with a second polarized light that is modulated with a second transmitted signal, and outputs a second detected signal. The signal processing unit establishes a first control coefficient on the basis of the first detected signal, and establishes a second control coefficient on the basis of the first control coefficient and the second detected signal, and employs the second control coefficient to output a first received signal corresponding to the first transmitted signal, and a second received signal corresponding to the second transmitted signal.

摘要翻译： 对于相干光接收装置，偏振复用光信号，第一信号被放置在第一偏振光上，第二信号被放置在第二偏振光上，在其发射侧被极化分割，并且 第一信号和第二信号不能与发送侧对应地被接收。 因此，公开了一种相干光接收装置，包括检测相干光的相干光接收单元和执行用控制系数设置的信号处理的信号处理单元。 相干光接收单元接收利用第一发送信号进行了调制的第一偏振光并输出第一检测信号，同时以第二发送信号调制的第二偏振光接收第一偏振光，并输出第二偏振光 检测信号。 信号处理单元基于第一检测信号建立第一控制系数，并且基于第一控制系数和第二检测信号建立第二控制系数，并且采用第二控制系数来输出第一接收信号 对应于第一发送信号，以及对应于第二发送信号的第二接收信号。

公开(公告)号：US09485033B2

公开(公告)日：2016-11-01

申请号：US14350125

申请日：2012-10-05

申请人： Wakako Yasuda ,  Daisaku Ogasahara ,  Shinsuke Fujisawa

发明人： Wakako Yasuda ,  Daisaku Ogasahara ,  Shinsuke Fujisawa

IPC分类号： H04J14/06 ,  H04B10/61 ,  H04L27/38

CPC分类号： H04B10/6166 ,  H04B10/612 ,  H04B10/614 ,  H04B10/6164 ,  H04B10/6165 ,  H04J14/06 ,  H04L27/3818

摘要： Signal processing means includes carrier compensation means for compensating for a phase difference and a frequency difference between signal light and local light in relation to two polarization signals, so as to generate two carrier compensated signals, symbol determination means for demodulating the two carrier compensated signals on the basis of a signal arrangement of multi-value modulation, symbol rough-determination means for demodulating the two carrier compensated signals on the basis of a signal arrangement in which the number of multi-values of the multi-value modulation is reduced, selection means for selecting either of an output of the symbol determination means and an output of the symbol rough-determination means, and coefficient setting means for updating filter coefficients of polarized wave separation means by using an output selected by the selection means.

摘要翻译： 信号处理装置包括用于相对于两个偏振信号补偿相位差和信号光与局部光之间的频率差的载波补偿装置，以产生两个载波补偿信号，用于解调两个载波补偿信号的符号确定装置 多值调制信号配置的基础，根据减少多值调制的多值的信号配置来解调两载波补偿信号的符号粗略判定装置，选择装置 用于选择符号确定装置的输出和符号粗略判定装置的输出中的任一个;以及系数设定装置，用于通过使用由选择装置选择的输出来更新偏振波分离装置的滤波器系数。