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1. 发明专利

JP2014171179A Likelihood generation circuit and likelihood generation method 有权
标题翻译： LIKELIHOOD生成电路和LIKELIHOOD生成方法
公开(公告)号：JP2014171179A
公开(公告)日：2014-09-18
申请号：JP2013043067
申请日：2013-03-05
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： FUJIMORI TAKAFUMI , SUGIHARA TAKASHI
IPC分类号： H04L27/38 , H04L27/00
摘要： PROBLEM TO BE SOLVED: To reduce a circuit scale when performing such communication that a modulation system is changed depending on a communication situation.SOLUTION: A likelihood generation circuit comprises: a symbol mapping selection part (13) selecting a symbol mapping system depending on a modulation system; a phase rotation part (11), depending on the symbol mapping system, deciding a phase rotation amount and performing phase rotation processing on the reception signal in the case that the modulation system 8QAM is selected, and outputting the reception signal as it is without performing phase rotation processing in the case that the modulation system 16QAM is selected; a likelihood generation part (12) generating a likelihood to the reception signal processed by the phase rotation part, and corresponding to the modulation system 16QAM; and an output likelihood value selection part (14) selecting and outputting a likelihood for 3 bits of the likelihood generated at the likelihood generation part in the case that the modulation system 8QAM is selected, and outputting the likelihood generated at the likelihood generation part as it is in the case that the modulation system 16QAM is selected.
摘要翻译：要解决的问题：为了减少根据通信情况改变调制系统的通信，减小电路规模。解决方案：可能性生成电路包括：符号映射选择部（13），其根据调制系统; 相位旋转部分（11），根据符号映射系统，在选择调制系统8QAM的情况下，决定相位旋转量并对接收信号执行相位旋转处理，并且在不执行的情况下输出接收信号在选择调制系统16QAM的情况下，进行相位旋转处理; 产生对由相位旋转部处理的接收信号的可能性，并且对应于调制系统16QAM的似然生成部分（12）; 以及输出似然值选择部（14），在选择了调制系统8QAM的情况下，选择并输出在似然率生成部生成的似然率的3比特的似然度，并输出似然生成部生成的似然在选择调制系统16QAM的情况下。

2. 发明专利

JP2012257164A Drive controller of semiconductor optical modulator 有权
标题翻译：半导体光电调制器驱动控制器
公开(公告)号：JP2012257164A
公开(公告)日：2012-12-27
申请号：JP2011130232
申请日：2011-06-10
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： SHIMAKURA YASUHISA , YAGYU EIJI , SUGIHARA TAKASHI , SAITO TAKESHI , ISHIMURA EITARO
IPC分类号： H04B10/04 , G02F1/015 , H04B10/06 , H04B10/14 , H04B10/142 , H04B10/152 , H04B10/26 , H04B10/28
摘要： PROBLEM TO BE SOLVED: To provide a drive controller for simultaneously suppressing both a bias drift and amplitude of a drive signal and stably operating a semiconductor MZ modulator.SOLUTION: The drive controller of the semiconductor optical modulator for receiving light from a light source emitting continuous light and periodically changing an optical output characteristic to drive voltage includes: a peak detection section for detecting an electric signal changing in accordance with output light outputted from the semiconductor optical modulator; an oscillation circuit; a synchronous detection circuit for performing synchronous detection on the basis of output of the oscillation circuit and a peak detection output signal of the peak detection section; a bias control section for controlling the phase bias of the semiconductor optical modulator in accordance with output of the synchronous detection circuit; an amplifier for amplifying a data signal; an amplification control section for controlling the amplitude of the amplified data signal outputted from the amplifier in accordance with the output of the synchronous detection circuit; a power supply circuit for supplying reference voltage to the output of the amplifier; and an adder for receiving the output of the amplifier and the reference voltage and generating the drive voltage.
摘要翻译：要解决的问题：提供一种用于同时抑制驱动信号的偏置漂移和振幅以及稳定地操作半导体MZ调制器的驱动控制器。解决方案：用于从发射连续光的光源接收光并周期性地将光输出特性改变为驱动电压的半导体光调制器的驱动控制器包括：峰值检测部分，用于检测根据输出光的电信号变化从半导体光调制器输出; 振荡电路; 同步检测电路，用于根据振荡电路的输出和峰值检测部分的峰值检测输出信号进行同步检测; 偏置控制部分，用于根据同步检测电路的输出来控制半导体光调制器的相位偏置; 用于放大数据信号的放大器; 放大控制部分，用于根据同步检测电路的输出来控制从放大器输出的放大数据信号的幅度; 用于向放大器的输出端提供参考电压的电源电路; 以及用于接收放大器的输出和参考电压并产生驱动电压的加法器。版权所有（C）2013，JPO＆INPIT

3. 发明专利

JP2012019536A Optical receiver 有权
标题翻译：光接收机
公开(公告)号：JP2012019536A
公开(公告)日：2012-01-26
申请号：JP2011186185
申请日：2011-08-29
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： ABE JUNICHI , SUGIHARA TAKASHI , SHIMIZU KATSUHIRO
IPC分类号： H04B10/60 , H04B10/40 , H04B10/50 , H04B10/524 , H04B10/66 , H04B10/69 , H04L25/03
摘要： PROBLEM TO BE SOLVED: To provide an optical receiver in which occurrence of separation penalty due to a light separation part is prevented, dependency on the modulation system is eliminated, and easiness is ensured in packaging.SOLUTION: The optical receiver comprises: a light separation part (11) which separates an optical input signal to multiple paths; photoelectric conversion units (12a and 12b) which convert the separated optical input signals into electric signals; discriminators (13a and 13b) which output the results of discrimination performed on the electric signals output from the photoelectric conversion units (12a and 12b) based on predetermined thresholds (V,V); and an operational circuit (14) which performs a predetermined arithmetic operation based on the results of discrimination output from the discriminators (13a and 13b).
摘要翻译：要解决的问题：为了提供防止由于光分离部分产生分离罚分的光接收器，消除了对调制系统的依赖性，并且在包装中确保了容易度。光接收机包括：光分离部分（11），其将光输入信号分离成多个路径; 将分离的光输入信号转换为电信号的光电转换单元（12a和12b）基于预定的阈值（V th1 ，V“）输出对从光电转换单元（12a和12b）输出的电信号执行的鉴别结果的鉴别器（13a和13b） SB POS =“POST”> th2 ）; 以及基于从识别器（13a和13b）输出的鉴别结果执行预定算术运算的运算电路（14）。版权所有（C）2012，JPO＆INPIT

4. 发明专利

JP2011254379A Optical receiver, optical communication system, and optical signal reception method 审中-公开
标题翻译：光接收机，光通信系统和光信号接收方法
公开(公告)号：JP2011254379A
公开(公告)日：2011-12-15
申请号：JP2010127880
申请日：2010-06-03
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： SAWADA KAZUSHIGE , ISHIDA KAZUYUKI , SUGIHARA TAKASHI , SHIMIZU KATSUHIRO
IPC分类号： H04B10/40 , G02F1/01 , H04B10/07 , H04B10/50 , H04B10/516 , H04B10/548 , H04B10/58 , H04B10/60 , H04B10/61 , H04B10/66
摘要： PROBLEM TO BE SOLVED: To provide an optical receiver, an optical communication system, and an optical signal reception method capable of preventing a bias control voltage of a mach-zehnder interferometer from converging to a wrong bias point and suppressing degradation of signal quality.SOLUTION: The optical receiver, the optical communication system, and the optical signal reception method comprises: optical transmission characteristic control means to calculate a bias control voltage so that an optical transmission characteristic of a mach-zehnder interferometer becomes a desired value; fixing means to fix the calculated bias control voltage; and dispersion compensation amount decision means to determine a dispersion compensation amount which compensates a dispersion of the received optical signal while the bias control voltage is in a fixed state, and adjust the bias control voltage based on an output of synchronous detection means by making the fixed bias control voltage variable after the dispersion compensation amount is determined.
摘要翻译：要解决的问题：提供一种能够防止马赫 - 泽德干涉仪的偏置控制电压收敛到错误偏置点并抑制信号劣化的光接收机，光通信系统和光信号接收方法质量。解决方案：光接收机，光通信系统和光信号接收方法包括：光传输特性控制装置，用于计算偏置控制电压，使得马赫 - 泽德干涉仪的光传输特性成为期望值; 固定装置，用于固定所计算的偏置控制电压; 以及色散补偿量判定装置，用于确定在偏置控制电压处于固定状态时补偿所接收的光信号的色散的色散补偿量，并且通过使固定的方式基于同步检测装置的输出来调整偏置控制电压确定色散补偿量后的偏置控制电压可变。版权所有（C）2012，JPO＆INPIT

5. 发明专利

JP2011232553A Optical transmitter, optical communication system and modulation method 审中-公开
标题翻译：光学发射机，光通信系统和调制方法
公开(公告)号：JP2011232553A
公开(公告)日：2011-11-17
申请号：JP2010102967
申请日：2010-04-28
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： UTO KENICHI , YOSHIDA TAKESHI , SUGIHARA TAKASHI
IPC分类号： G02F1/03 , H04B10/07 , H04B10/516 , H04B10/524 , H04B10/556 , H04B10/588 , H04B10/61 , H04J14/00 , H04J14/02
摘要： PROBLEM TO BE SOLVED: To attain an optical transmitter capable of realizing a linear electro-optical conversion and of reducing a difference between an Ich signal level and a Qch signal level.SOLUTION: The optical transmitter comprises a light source 1, an I/Q modulator 2 for generating a light signal for an I channel and a light signal for a Q channel by converting a light output from the light source 1, a driver 3 for the Ich for providing an I channel driving signal to the I/Q modulator 2, a driver 4 for the Qch for providing a Q channel driving signal to the I/Q modulator 2, a monitor PD6 for detecting a light intensity of the light signal output from the I/Q modulator 2, and a control circuit 5 for adjusting an amplitude of the I channel driving signal and an amplitude of the Q channel driving signal respectively, on the basis of the light intensity.
摘要翻译：解决的问题：为了实现能够实现线性电光转换和减小Ich信号电平和Qch信号电平之间的差异的光发射机。解决方案：光发射机包括光源1，I / Q调制器2，用于通过转换来自光源1的光输出，产生用于I通道的光信号和用于Q通道的光信号，驱动器 3，用于向I / Q调制器2提供I通道驱动信号的Ich，用于向I / Q调制器2提供Q通道驱动信号的用于Qch的驱动器4，用于检测I / Q调制器2的光强度的监视器PD6 根据光强度，分别从I / Q调制器2输出的光信号和用于分别调整I通道驱动信号的幅度和Q通道驱动信号的振幅的控制电路5。版权所有（C）2012，JPO＆INPIT

6. 发明专利

JP2008124894A Digital/analog converter 有权
标题翻译：数字/模拟转换器
公开(公告)号：JP2008124894A
公开(公告)日：2008-05-29
申请号：JP2006307977
申请日：2006-11-14
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： ICHIKAWA TOSHIYUKI , MIZUOCHI TAKASHI , SUGIHARA TAKASHI
IPC分类号： H03M1/74
摘要： PROBLEM TO BE SOLVED: To obtain a D/A converter having excellent linearity even for a signal of about 40Gb/s or more, for example.
SOLUTION: The D/A converter comprises a signal processing circuit 30 which performs arithmetic processing by convoluting parallel electric signals with an inverse function of an optical fiber, performs further parallel processing and outputs parallel electric signals after arithmetic processing; a synthetic optical signal generating circuit 100 which generates a synthetic optical signal containing optical signals of a plurality of different wavelengths on the basis of the parallel electric signals after processing; a photoelectric converting circuit 40 which converts the synthetic optical signal into an electric signal; and a current amplifier 50 which amplifies the electric signal output from the photoelectric converting circuit and generates an analog output signal.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：例如，为了获得即使对于约40Gb / s以上的信号也具有优异的线性度的D / A转换器。解决方案：D / A转换器包括信号处理电路30，其通过与光纤的反向功能卷积并行电信号进行算术处理，进一步并行处理并在算术处理之后输出并行电信号; 合成光信号产生电路100，其根据处理后的并行电信号生成含有多个不同波长的光信号的合成光信号; 将合成光信号转换为电信号的光电转换电路40; 以及放大从光电转换电路输出的电信号并产生模拟输出信号的电流放大器50。版权所有（C）2008，JPO＆INPIT

7. 发明专利

JP2008124893A Variance pre-equalization optical transmitter and optical communication system 有权
标题翻译：变量均衡光传输和光通信系统
公开(公告)号：JP2008124893A
公开(公告)日：2008-05-29
申请号：JP2006307973
申请日：2006-11-14
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： SUGIHARA TAKASHI , SHIMIZU KATSUHIRO , KONISHI YOSHIAKI , MIZUOCHI TAKASHI
IPC分类号： H04B10/2507 , H04B10/07 , H04B10/25 , H04B10/516 , H04B10/54 , H04B10/548 , H04B10/61
摘要： PROBLEM TO BE SOLVED: To perform positive, negative variance pre-equalization even without holding an amount of data beforehand by switching a control point of optical phase adjustment in response to a code of a pre-equalized variance amount.
SOLUTION: A variance pre-equalization optical transmitter comprises a variance pre-equalization data generating means 17 to which transmission source data stream is input and which performs inverse function operation on a wavelength variance of a transmission line on which the transmission source data stream is transmitted, and outputs resultant data of two streams as a driving signal; MZ type optical modulation units 12a, 12b which use the driving signal output from the variance pre-equalization data generating means 17 to generate first and second photo-electric fields which are orthogonal with each other, from branched light input from a light source 10 via a light branching means 11, and an optical phase adjustment unit 13 which controls a relative phase difference between the first and the second photo-electric fields by shifting phases just by a set shift amount, wherein a setting value of the shift amount in the optical phase adjustment unit 13 is switched, thereby varying the code of the variance pre-equalization amount.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：通过响应于预均衡方差量的代码切换光相位调整的控制点，即使不预先保持数据量也能执行正，负方差预均衡。解决方案：方差预均衡光发射机包括方差预均衡数据产生装置17，传输源数据流被输入到该方差预均衡数据产生装置17，并且对发射源数据的传输线的波长方差执行反功能操作发送流，并输出两个流的结果数据作为驱动信号; MZ型光调制单元12a，12b，其使用从方差预均衡数据产生装置17输出的驱动信号，从分别从光源10输入的分支光生成彼此正交的第一和第二光电场，经由光分支装置11和光学相位调整单元13，其通过移位相位刚刚设定偏移量来控制第一和第二光电场之间的相对相位差，其中光学位移量的设定值相位调整单元13被切换，从而改变方差预均衡量的代码。版权所有（C）2008，JPO＆INPIT

8. 发明专利

JP2004096137A Optical receiver, optical communication system, and optically receiving method 有权
标题翻译：光接收机，光通信系统和光接收方式
公开(公告)号：JP2004096137A
公开(公告)日：2004-03-25
申请号：JP2002250160
申请日：2002-08-29
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： ABE JUNICHI , SUGIHARA TAKASHI , MIZUOCHI TAKASHI
IPC分类号： H04B10/60 , H04B10/07 , H04B10/40 , H04B10/50 , H04B10/516 , H04B10/61 , H04B10/69 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/26 , H04B10/28
摘要： PROBLEM TO BE SOLVED: To provide an optical communication system which can increase the reception sensitivity of an optical receiver by suppressing a separation penalty by an optically separating means, can have no dependency on a modulation system and can be easily mounted, and also to provide the optical receiver and an optically receiving method.
SOLUTION: The system is provided with a means for separating an optical reception signal into a plurality of optical signals; a means for individually converting the optical signals into electric signals respectively; an identifier for converting each of the electric signals into a digital data signal on the basis of a predetermined threshold for each electric signal; and a path selecting means for specifying maximum likelihood data on the basis of the plurality of digital data signals and outputting the specified data.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：为了提供一种通过抑制光学分离装置的分离罚分来提高光接收机的接收灵敏度的光通信系统，可以不依赖于调制系统并且可以容易地安装，并且还提供光接收机和光接收方法。解决方案：该系统具有用于将光接收信号分离成多个光信号的装置; 分别将光信号分别转换为电信号的装置; 基于每个电信号的预定阈值将每个电信号转换成数字数据信号的标识符; 以及路径选择装置，用于根据多个数字数据信号指定最大似然数据并输出指定的数据。版权所有（C）2004，JPO

9. 发明专利

JP2012255929A Light modulator and light modulation method 有权
标题翻译：光调制器和调光方法
公开(公告)号：JP2012255929A
公开(公告)日：2012-12-27
申请号：JP2011129123
申请日：2011-06-09
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： MATSUDA KEISUKE , SUGIHARA TAKASHI , MOCHIZUKI KEITA , ARIGA HIROSHI
IPC分类号： G02F1/015
CPC分类号： H04B10/5053 , G02F1/0123 , G02F1/225
摘要： PROBLEM TO BE SOLVED: To obtain a light modulator capable of stabilizing intensity of light to be output without depending on a value of a code at the time of phase modulation.SOLUTION: A light modulator comprises: modulation waveguides 3 and 4; a branching filter 2; phase adjustment waveguides 5 and 6 for changing a phase of each output light of the modulation waveguides 3 and 4; a multiplexer 7 for combining the output light of the phase adjustment waveguide 5 with the output light of the phase adjustment waveguide 6; a gain control part 13 and a modulation bias control part 14 for, on the basis of a relationship between input voltage and amplitude of output light in the modulation waveguides 3 and 4, controlling voltage applied to the modulation waveguides 3 and 4 so that a result of adding amplitude of the output light of the modulation waveguide 3 to the amplitude of the output light from the modulation waveguide 4 when the output light of the modulation waveguide 3 has a predetermined phase value is equal to a result of adding the amplitude of the output light of the modulation waveguide 3 to the amplitude of the output light of the modulation waveguide 4 when the output light of the modulation waveguide 4 has the predetermined phase value; and a phase adjustment bias control part 15 for controlling the phase adjustment waveguides 5 and 6 so as to cancel a phase error.
摘要翻译：要解决的问题：获得能够稳定输出的光强度而不依赖于相位调制时的代码值的光调制器。解决方案：光调制器包括：调制波导3和4; 分支滤波器2; 用于改变调制波导3和4的每个输出光的相位的相位调节波导5和6; 多路复用器7，用于将相位调节波导5的输出光与相位调节波导6的输出光组合; 增益控制部分13和调制偏压控制部分14，用于根据输入电压和调制波导3和4中的输出光的振幅之间的关系，控制施加到调制波导3和4的电压，使得结果当调制波导3的输出光具有预定相位值时，将调制波导3的输出光的幅度与来自调制波导4的输出光的振幅相加，等于输出的幅度的结果当调制波导4的输出光具有预定相位值时，调制波导3的光到调制波导4的输出光的振幅; 以及用于控制相位调整波导5和6以消除相位误差的相位调整偏置控制部分15。版权所有（C）2013，JPO＆INPIT

10. 发明专利

JP2012227606A Pre-equalization optical transmitter 有权
标题翻译：预均衡光传输器
公开(公告)号：JP2012227606A
公开(公告)日：2012-11-15
申请号：JP2011091209
申请日：2011-04-15
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： FUJIMORI TAKAFUMI , SUGIHARA TAKASHI
IPC分类号： H04B10/18 , H04B10/02 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/26 , H04B10/28
摘要： PROBLEM TO BE SOLVED: To provide a pre-equalization optical transmitter capable of achieving reductions in circuit size, power consumption and cost by creating a RZ optical pre-equalization signal without using an additional circuit for analog processing.SOLUTION: The pre-equalization optical transmitter includes: FIR filters 1-4 that are arranged in parallel to each other to create a pre-equalization signal; D/A converters 5-8 each of which converts the pre-equalization signal into an analog signal; selectors 9, 10 each of which converts a parallel signal into a serial signal accommodated into one symbol length; a light source 13; and an optical modulator 14 that modulates the light from the light source 13 into an optical signal, based on the serial signal.
摘要翻译：要解决的问题：提供一种预均衡光发射机，其能够通过在不使用用于模拟处理的附加电路的情况下创建RZ光学预均衡信号来实现电路尺寸，功耗和成本的降低。解决方案：预均衡光发射机包括：彼此并联布置的FIR滤波器1-4，以产生预均衡信号; D / A转换器5-8，其将预均衡信号转换成模拟信号; 选择器9,10各自将并行信号转换成容纳为一个符号长度的串行信号; 光源13; 以及基于串行信号将来自光源13的光调制成光信号的光调制器14。版权所有（C）2013，JPO＆INPIT

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