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公开(公告)号：US20100287450A1
公开(公告)日：2010-11-11
申请号：US12775825
申请日：2010-05-07
申请人： Takashi Sugihara , Takashi Mizuochi , Kazuo Kubo
发明人： Takashi Sugihara , Takashi Mizuochi , Kazuo Kubo
CPC分类号： H04L25/067
摘要： An optical receiving apparatus includes: an A/D converting circuit; a received-signal demodulating circuit that demodulates a received digital signal from the A/D converting circuit into an m-bit received signal; a soft-decision-data generating circuit that generates n-bit (n≦m) soft-decision data based on the m-bit received signal; and an error correcting circuit that performs error correction based on the n-bit soft-decision data and outputs an error-corrected received signal. The soft-decision-data generating circuit generates soft-decision data of n bits (n=p+1) that corresponds to a determination result according to 2n−1 soft-decision thresholds, by using an MSB of the m-bit received signal as hard-decision data, and by using, as reliability information, a result of comparison between a plurality of bits (k bits, where k≦m) on an MSB side of the m-bit received signal and a fixed threshold, or p bits (p≦m−k) selected from (m−k) bits on an LSB side of the m-bit received signal.
摘要翻译： 一种光接收装置，包括：A / D转换电路; 接收信号解调电路，将接收到的数字信号从A / D转换电路解调为m位接收信号; 软判决数据产生电路，其基于所述m位接收信号产生n位（n＆nl; m）个软判决数据; 以及错误校正电路，其基于n位软判决数据进行纠错，并输出纠错接收信号。 软判决数据生成电路通过使用m比特接收信号的MSB，生成与根据2n-1个软判定阈值的判定结果对应的n位（n = p + 1）的软判决数据 作为硬判决数据，并且通过使用作为可靠性信息的m位接收信号的MSB侧的多个比特（k比特，其中k比特，其中k和nlE; m）与固定阈值的比较，或者p 从m位接收信号的LSB侧的（m-k）比特中选择的比特（p＆nlE; m-k）。
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公开(公告)号：US08645806B2
公开(公告)日：2014-02-04
申请号：US12775825
申请日：2010-05-07
申请人： Takashi Sugihara , Takashi Mizuochi , Kazuo Kubo
发明人： Takashi Sugihara , Takashi Mizuochi , Kazuo Kubo
IPC分类号： H03M13/45
CPC分类号： H04L25/067
摘要： An optical receiving apparatus includes: an A/D converting circuit; a received-signal demodulating circuit that demodulates a received digital signal from the A/D converting circuit into an m-bit received signal; a soft-decision-data generating circuit that generates n-bit (n≦m) soft-decision data based on the m-bit received signal; and an error correcting circuit that performs error correction based on the n-bit soft-decision data and outputs an error-corrected received signal. The soft-decision-data generating circuit generates soft-decision data of n bits (n=p+1) that corresponds to a determination result according to 2n−1 soft-decision thresholds, by using an MSB of the m-bit received signal as hard-decision data, and by using, as reliability information, a result of comparison between a plurality of bits (k bits, where k≦m) on an MSB side of the m-bit received signal and a fixed threshold, or p bits (p≦m−k) selected from (m−k) bits on an LSB side of the m-bit received signal.
摘要翻译： 一种光接收装置，包括：A / D转换电路; 接收信号解调电路，将接收到的数字信号从A / D转换电路解调为m位接收信号; 软判决数据产生电路，其基于所述m位接收信号产生n位（n @ m）个软判决数据; 以及错误校正电路，其基于n位软判决数据进行纠错，并输出纠错接收信号。 软判决数据生成电路通过使用m比特接收信号的MSB，生成与根据2n-1个软判定阈值的判定结果对应的n位（n = p + 1）的软判决数据 作为硬判决数据，并且通过使用作为可靠性信息的m位接收信号的MSB侧的多个位（k位，其中k @ m）与固定阈值之间的比较结果，或者p 从m位接收信号的LSB侧的（mk）位中选择的位（p @ mk）。
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公开(公告)号：US08495475B2
公开(公告)日：2013-07-23
申请号：US12767120
申请日：2010-04-26
申请人： Kazuo Kubo , Takashi Mizuochi , Takashi Sugihara
发明人： Kazuo Kubo , Takashi Mizuochi , Takashi Sugihara
IPC分类号： G06F11/00
CPC分类号： H03M13/2792 , H03M13/1102 , H03M13/1515 , H03M13/152 , H03M13/23 , H03M13/2906 , H03M13/2933 , H03M13/2936 , H03M13/2966 , H04J3/1652 , H04J2203/0089 , H04L1/0041 , H04L1/0065 , H04L2001/0096
摘要： An FEC frame structuring device includes a multi-lane distributing unit that distributes a data frame to be transmitted to n lanes, FEC coding units each performs FEC coding of the distributed data frame independently for each of the n lanes to generate an FEC frame, a multiplexing unit that multiplexes the FEC frame from the FEC coding units by relating to m channels of an optical signal, a demultiplexing unit that demultiplexes the m channels of the received optical signal by relating to the n lanes, FEC decoding units each performs FEC decoding of the demultiplexed FEC frame independently for each of the n lanes, and a multi-lane synchronizing unit that synchronizes the n lanes with each other after the FEC decoding performed by the FEC decoding units to reconstruct the original data frame.
摘要翻译： FEC帧结构设备包括分配要发送的数据帧到n个通道的多通道分配单元，FEC编码单元各自独立地对n个通道中的每一个执行分布式数据帧的FEC编码以生成FEC帧， 多路复用单元，其通过与光信号的m个信道相关的FEC编码单元来复用FEC帧;解复用单元，通过与n个通道相关来对接收到的光信号的m个信道进行解复用，FEC解码单元各自执行FEC解码 对于n个通道中的每一个独立地解复用的FEC帧，以及多个通道同步单元，其在由FEC解码单元执行的FEC解码之后使n个通道彼此同步以重建原始数据帧。
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公开(公告)号：US20100287449A1
公开(公告)日：2010-11-11
申请号：US12767120
申请日：2010-04-26
申请人： Kazuo Kubo , Takashi Mizuochi , Takashi Sugihara
发明人： Kazuo Kubo , Takashi Mizuochi , Takashi Sugihara
CPC分类号： H03M13/2792 , H03M13/1102 , H03M13/1515 , H03M13/152 , H03M13/23 , H03M13/2906 , H03M13/2933 , H03M13/2936 , H03M13/2966 , H04J3/1652 , H04J2203/0089 , H04L1/0041 , H04L1/0065 , H04L2001/0096
摘要： An FEC frame structuring device includes a multi-lane distributing unit that distributes a data frame to be transmitted to n lanes, FEC coding units each performs FEC coding of the distributed data frame independently for each of the n lanes to generate an FEC frame, a multiplexing unit that multiplexes the FEC frame from the FEC coding units by relating to m channels of an optical signal, a demultiplexing unit that demultiplexes the m channels of the received optical signal by relating to the n lanes, FEC decoding units each performs FEC decoding of the demultiplexed FEC frame independently for each of the n lanes, and a multi-lane synchronizing unit that synchronizes the n lanes with each other after the FEC decoding performed by the FEC decoding units to reconstruct the original data frame.
摘要翻译： FEC帧结构设备包括分配要发送的数据帧到n个通道的多通道分配单元，FEC编码单元各自独立地对n个通道中的每一个执行分布式数据帧的FEC编码以生成FEC帧， 多路复用单元，其通过与光信号的m个信道相关的FEC编码单元来复用FEC帧;解复用单元，通过与n个通道相关来对接收到的光信号的m个信道进行解复用，FEC解码单元各自执行FEC解码 对于n个通道中的每一个独立地解复用的FEC帧，以及多个通道同步单元，其在由FEC解码单元执行的FEC解码之后使n个通道彼此同步以重建原始数据帧。
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5.发明申请PRE-EQUALIZATION OPTICAL TRANSMITTER AND PRE-EQUALIZATION OPTICAL FIBER TRANSMISSION SYSTEM 审中-公开预均衡光传输和预均衡光纤传输系统公开(公告)号：US20120201546A1
公开(公告)日：2012-08-09
申请号：US13498626
申请日：2010-10-19
申请人： Takashi Mizuochi , Takashi Sugihara
发明人： Takashi Mizuochi , Takashi Sugihara
CPC分类号： H04B10/25137 , H04B10/505 , H04B10/5162 , H04B2210/254
摘要： A pre-equalization optical transmitter includes: an RZ conversion circuit for generating an RZ-type input data sequence based on an NRZ-type input data sequence and a clock that is twice the speed of the NRZ-type input data sequence; a digital filter for generating pre-equalized data by a convolution operation between the RZ-type input data sequence and a desired transfer function corresponding to the wavelength dispersion of an optical fiber transmission path; D/A converters for performing D/A conversion on the pre-equalized data to output analog pre-equalized data; and a vector modulator for modulating light from a laser light source based on the analog pre-equalized data to output an RZ-type optical signal.
摘要翻译： 预均衡光发射机包括：RZ转换电路，用于基于NRZ型输入数据序列和NRZ型输入数据序列的速度的两倍的时钟产生RZ型输入数据序列; 数字滤波器，用于通过RZ型输入数据序列与对应于光纤传输路径的波长色散的期望传输函数之间的卷积运算产生预均衡数据; D / A转换器，用于对预均衡数据执行D / A转换以输出模拟预均衡数据; 以及用于基于所述模拟预均衡数据调制来自激光光源的光的矢量调制器，以输出RZ型光信号。
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公开(公告)号：US07505695B2
公开(公告)日：2009-03-17
申请号：US10508321
申请日：2003-04-23
IPC分类号： H04B10/06
CPC分类号： H04B10/6971 , H04B10/675 , H04B10/6972
摘要： The present invention includes an optical band-limiting filter which imposes a band-limitation on an input optical signal, an opto-electric converter which converts the optical signal output from the optical band-limiting filter into an electric signal, a lowpass filter which imposes the band-limitation on the electric signal output from the opto-electric converter, an amplifier which amplifies the output signal of the lowpass filter, and an electric equalizer which performs an equalization processing on a waveform of the electric signal output from the opto-electric converter are provided, and a full width at half maximum of the optical band-limiting filter is set to be equivalent to or smaller than a bit rate frequency of the optical signal.
摘要翻译： 本发明包括对输入光信号施加带限限制的光限幅滤波器，将从光限带滤波器输出的光信号转换为电信号的光电转换器，施加 从光电转换器输出的电信号的频带限制，放大低通滤波器的输出信号的放大器和对从光电输出的电信号的波形进行均衡处理的电均衡器 转换器，并且将光限幅滤波器的半值全宽设置为等于或小于光信号的比特率频率。
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公开(公告)号：US07379671B2
公开(公告)日：2008-05-27
申请号：US10609366
申请日：2003-07-01
CPC分类号： H04B10/5051 , H04B10/505 , H04B10/5165 , H04B10/548
摘要： An optical modulation processing section is provided which, in turn, includes a signal carrier-suppressed pulse modulating unit that performs signal carrier-suppressed pulse modulation on a light source signal to thereby create a CS-RZ signal, a phase modulating unit that performs phase modulation on a data signal based on the CS-RZ signal to thereby convert the data signal to a phase-modulated signal, and an optical filtering unit that filters out redundant frequency components included in the phase modulation signal.
摘要翻译： 提供了一种光调制处理部，其进而包括对光源信号执行信号载波抑制脉冲调制从而产生CS-RZ信号的信号载波抑制脉冲调制单元，相位调制单元执行相位 基于CS-RZ信号对数据信号进行调制，从而将数据信号转换为相位调制信号;以及滤波单元，滤除包括在相位调制信号中的冗余频率分量。
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8.发明授权Optical transfer system, optical transmission device, and optical reception device 有权光传输系统，光传输设备和光接收设备公开(公告)号：US08909066B2
公开(公告)日：2014-12-09
申请号：US13814617
申请日：2011-09-30
CPC分类号： H04J14/06 , H04B10/5053 , H04B10/532 , H04B10/616 , H04J14/002
摘要： In an optical transfer system, an optical transmission unit generates an optical signal in which respective polarization components are alternately present on a time axis, a time period during which the respective polarization components are simultaneously present on the time axis is substantially zero, and a symbol repetition cycle of optical signals of the respective polarization components becomes Ts, an optical reception unit causes an interference between local oscillation light and a received optical signal and converts an interfered optical signal to an electric signal, and a received electric-signal processing unit performs analog-digital conversion of an electric signal, elimination of a delay difference of Ts/2 between the respective polarized signal components, and adaptive equalization of a distortion other than the delay difference.
摘要翻译： 在光传输系统中，光传输单元产生在时间轴上交替存在各偏振分量的光信号，时间轴上同时存在各偏振分量的时间段基本上为零，以及符号 各个偏振分量的光信号的重复周期变为Ts，光接收单元引起局部振荡光和接收到的光信号之间的干扰，并将干扰的光信号转换为电信号，并且接收的电信号处理单元执行模拟 电信号的数字转换，消除各极化信号分量之间的Ts / 2的延迟差，以及除了延迟差之外的失真的自适应均衡。
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公开(公告)号：US08718487B2
公开(公告)日：2014-05-06
申请号：US13140955
申请日：2010-01-13
IPC分类号： H04B10/00
CPC分类号： H04L27/36 , H04B10/5053 , H04B10/5055 , H04B10/516
摘要： An optical transmitter for converting an input data series into an optical multi-level signal and for outputting the same, includes an LUT in which data for executing optical multi-level modulation is stored and from which first modulation data and second modulation data are output based on the input data series. A DAC converts the first modulation data by D/A conversion to generate a first multi-level signal. A DAC converts the second modulation data by D/A conversion to generate a second multi-level signal. A dual-electrode MZ modulator includes a first phase modulator for modulating light from a light source in accordance with the first multi-level signal and a second phase modulator for modulating light from the light source in accordance with the second multi-level signal, and combines an optical signal from the first phase modulator and an optical signal from the second phase modulator to output the optical multi-level signal.
摘要翻译： 用于将输入数据序列转换为光学多级信号并用于输出的光发送器包括：LUT，其中存储用于执行光学多电平调制的数据，并从其输出第一调制数据和第二调制数据 在输入数据系列上。 DAC通过D / A转换来转换第一调制数据以产生第一多电平信号。 DAC通过D / A转换来转换第二调制数据以产生第二多电平信号。 双电极MZ调制器包括用于根据第一多电平信号调制来自光源的光的第一相位调制器和用于根据第二多电平信号调制来自光源的光的第二相位调制器，以及 组合来自第一相位调制器的光信号和来自第二相位调制器的光信号以输出光多电平信号。
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公开(公告)号：US08463138B2
公开(公告)日：2013-06-11
申请号：US12826129
申请日：2010-06-29
CPC分类号： H04B10/50575 , G02F1/0123 , G02F1/2255 , H04B10/564
摘要： Provided is a multi-value optical transmitter in which a DC bias may be controlled to be stabilized so as to obtain stable optical transmission signal quality in multi-value modulation using a dual-electrode MZ modulator. The multi-value optical transmitter includes: D/A converters for performing D/A conversion on first and second modulation data which are set based on an input data series, so as to generate a first and a second multi-value signal, respectively; a dual-electrode MZ modulator including phase modulators for modulating light from a light source based on the first multi-value signal and the second multi-value signal, so as to combine optical signals from the phase modulators to output the optical multi-value signal; an optical output power monitor for detecting average power of the optical multi-value signal; and a DC bias control unit for controlling a DC bias for the dual-electrode MZ modulator, so as to maximize the average power.
摘要翻译： 提供了一种多值光发射机，其中可以将DC偏压控制为稳定，以便使用双电极MZ调制器在多值调制中获得稳定的光传输信号质量。 多值光发射机包括：D / A转换器，用于对基于输入数据序列设置的第一和第二调制数据执行D / A转换，以分别产生第一和第二多值信号; 一种双电极MZ调制器，包括基于第一多值信号和第二多值信号调制来自光源的光的相位调制器，以便组合来自相位调制器的光信号以输出光学多值信号 ; 用于检测光学多值信号的平均功率的光输出功率监视器; 以及用于控制双电极MZ调制器的DC偏压的DC偏置控制单元，以使平均功率最大化。
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