公开(公告)号：US20130266308A1

公开(公告)日：2013-10-10

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.

摘要翻译： 所公开的相干光接收机包括局部光源; 90度混合电路; 光电转换器; 一个模拟 - 数字转换器; 偏斜加法单元; 和FFT运算单元。 90度混合电路使多路信号光与本地光源的本地光干涉，并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数字化并输出检测到的数字信号。 偏移加法单元将检测到的数字信号的绝对值等于其符号与连接到90度混合电路的每个输出通道的每个通道中的传播延迟差的偏斜量相反的附加偏移量相加 。 FFT运算部对偏斜加法部的输出进行快速傅里叶变换。

公开(公告)号：US20130051790A1

公开(公告)日：2013-02-28

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： H04B10/08 ,  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：US20120237202A1

公开(公告)日：2012-09-20

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： H04B10/08

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：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：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：US08861648B2

公开(公告)日：2014-10-14

申请号：US13260297

申请日：2010-03-31

申请人： Hidemi Noguchi ,  Junichi Abe ,  Tomoyuki Yamase ,  Yasushi Amamiya

发明人： Hidemi Noguchi ,  Junichi Abe ,  Tomoyuki Yamase ,  Yasushi Amamiya

IPC分类号： H04B17/00 ,  H04B3/46 ,  H03L7/081 ,  H04L7/033 ,  H04L7/00

CPC分类号： H04L7/033 ,  H03L7/0816 ,  H04L7/0029 ,  H04L7/0037

摘要： To adequately perform sampling, a receiving device that solves problems that involve an increase in circuit area and an increase in cost, is provided.A/D converter 2 samples a coherent signal that is an analog signal in synchronization with a sampling clock signal so as to convert the analog signal into a digital signal. DSP 3 demodulates the digital signal converted by A/D converter 2 and computes a phase of the sampling clock signal in which an error rate of the digital signal is the minimum based on the demodulated digital signal. Sampling clock extraction circuit 4 extracts a clock signal having a symbol rate of the coherent signal therefrom. Phase adjustment circuit 5 adjusts the phase of the clock signal extracted by sampling clock extraction circuit 4 to the phase computed by DSP 3 and generates a clock signal having the adjusted phase as the sampling clock signal.

摘要翻译： 为了充分执行采样，提供了解决涉及电路面积增加和成本增加的问题的接收装置。 A / D转换器2与采样时钟信号同步地采样模拟信号的相干信号，以将模拟信号转换为数字信号。 DSP 3解调由A / D转换器2转换的数字信号，并且基于解调的数字信号计算数字信号的错误率为最小的采样时钟信号的相位。 采样时钟提取电路4从其中提取具有相干信号的符号速率的时钟信号。 相位调整电路5将由采样时钟提取电路4提取的时钟信号的相位调整为由DSP3计算的相位，并生成具有调整后的相位的时钟信号作为采样时钟信号。

公开(公告)号：US20140166622A1

公开(公告)日：2014-06-19

申请号：US14233305

申请日：2012-08-24

申请人： Junichi Abe ,  Shinji Sato ,  Tomoko Tanabe ,  Naoaki Inoue

发明人： Junichi Abe ,  Shinji Sato ,  Tomoko Tanabe ,  Naoaki Inoue

IPC分类号： H01H33/26

CPC分类号： H01H33/26 ,  G01R31/1227 ,  H01H33/668 ,  H02B13/0655

摘要： Capacitors (5a, 5b) are provided in the insulators of bushings (4a, 4b), respectively. One ends of the capacitors (5a, 5b) are connected to central conductors (3a, 3b) side, and the other ends are connected to a tank (1) side at the ground potential. When a discharge signal from the outside of the tank (1) reaches the capacitors (5a, 5b) through the central conductors (3a, 3b), the capacitors (5a, 5b) work as a filter to attenuate and prevent the signal in the frequency band of the discharge waveform from propagating to the inside of the tank (1). When an antenna (7) placed in the tank (1) receives a signal in the frequency band of the discharge waveform, a discharge detection unit (20) determines that a discharge inside the tank has been detected.

摘要翻译： 电容器（5a，5b）分别设置在衬套（4a，4b）的绝缘体中。 电容器（5a，5b）的一端与中心导体（3a，3b）侧连接，另一端与接地电位的水箱（1）侧连接。 当来自罐（1）的外部的放电信号通过中心导体（3a，3b）到达电容器（5a，5b）时，电容器（5a，5b）用作滤波器，以衰减并防止 放电波形的频带从传播到罐（1）的内部。 当放置在储罐（1）中的天线（7）接收到放电波形的频带中的信号时，放电检测单元（20）确定已经检测到罐内的放电。