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1. 发明专利

JP2014230249A 信号処理装置及び信号処理方法审中-公开
标题翻译：信号处理装置和信号处理方法
公开(公告)号：JP2014230249A
公开(公告)日：2014-12-08
申请号：JP2013111011
申请日：2013-05-27
申请人：日本電気株式会社 , Nec Corp , 国立大学法人京都大学 , Kyoto Univ
发明人： OGASAWARA DAISAKU , MAEDA WAKAKO , ABE JUNICHI , HAYASHI KAZUNORI
IPC分类号： H04B10/2507 , H04B10/61 , H04J11/00
摘要：【課題】光通信システムの光受信装置における信号処理において、非線形歪に必要な補償回路の規模を小さくする。【解決手段】非線形補償部300は補償部350を備える。補償部350は、複数の異なる残留分散値における4つの偏波信号Ex(D1)、Ey(D1)、Ex(D2)、Ey(D2)の信号強度に基づいて算出される位相回転量&thetas;をキャンセルするように、2つの偏波信号Ex(D2)、Ey(D2)夫々を非線形補償するための係数exp(−j&thetas;)を生成する。【選択図】図5
摘要翻译：要解决的问题：为了使光通信系统的光接收机的信号处理中的非线性变形所需的补偿电路的比例变小。解决方案：非线性补偿单元300包括补偿单元350.补偿单元350生成系数exp（-j＆thetas）以非线性补偿两个极化信号E（D），E（D）中的每一个，以消除相位旋转量; 基于多个不同残余色散值中的四个偏振信号E（D），E（D），E（D），E（D）的信号强度来计算。

2. 发明专利

JP2013102506A Coherent light receiver, coherent light reception method, and inter-channel skew detection device and detection method for use in coherent light receiver 有权
标题翻译：相干光接收器，相干光接收方法和通道间检测装置及相干光接收器中使用的检测方法
公开(公告)号：JP2013102506A
公开(公告)日：2013-05-23
申请号：JP2013005366
申请日：2013-01-16
申请人： Nec Corp , 日本電気株式会社
发明人： YASUDA WAKAKO , ABE JUNICHI , FUKUCHI KIYOSHI
IPC分类号： H04B10/61 , G02F2/00
CPC分类号： H04B10/616 , H04B10/6151 , H04J14/02 , H04J14/06
摘要： PROBLEM TO BE SOLVED: To solve such a problem that in a coherent light receiver, when a skew occurs between channels, sufficient demodulation becomes impossible and reception performance deteriorates.SOLUTION: A coherent light receiver according to the present invention comprises: a localized light source; a 90° hybrid circuit; a photoelectric converter; an analog-digital converter; and a digital signal processing part. The 90° hybrid circuit outputs a plurality of light signals separated into a plurality of signal components by causing a multiplexed signal light to interfere with a localized light from the localized light source. The photoelectric converter detects the light signal and outputs a detection electrical signal. The analog-digital converter quantizes the detection electrical signal and outputs the quantized signal. The digital signal processing part includes: an FFT operation part for performing high-speed Fourier transformation processing on the quantized signal; a skew compensation part for compensating for a differential delay in propagation between the plurality of signal components calculated from a result of the high-speed Fourier transformation processing; and a demodulation part for demodulating the quantized signal.
摘要翻译：要解决的问题为了解决在相干光接收机中的问题，当在信道之间发生偏斜时，不可能进行足够的解调，并且接收性能劣化。解决方案：根据本发明的相干光接收器包括：局部光源; 90°混合电路; 光电转换器; 模数转换器; 和数字信号处理部分。 90°混合电路通过使复用的信号光干扰来自局部光源的局部光而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电信号。模拟数字转换器对检测电信号进行量化并输出量化信号。数字信号处理部包括：FFT运算部，用于对量化信号进行高速傅里叶变换处理; 偏斜补偿部分，用于补偿从高速傅里叶变换处理的结果计算出的多个信号分量之间的传播差分延迟; 以及用于解调量化信号的解调部分。版权所有（C）2013，JPO＆INPIT

3. 发明专利

JP2014146915A Digital optical transmitter, optical communication system, and digital optical transmission method 审中-公开
标题翻译：数字光传输器，光通信系统和数字光传输方法
公开(公告)号：JP2014146915A
公开(公告)日：2014-08-14
申请号：JP2013013315
申请日：2013-01-28
申请人： Nec Corp , 日本電気株式会社
发明人： ABE JUNICHI
IPC分类号： H04B10/556 , G02F1/01
摘要： PROBLEM TO BE SOLVED: To provide a digital optical transmitter, an optical communication system, and a digital optical transmission method, capable of easily compensating an I-Q imbalance caused by changes in transmission conditions such as wavelength switching and temperature fluctuation.SOLUTION: A digital optical transmitter 10 comprises: an I-Q balance control unit 20 which generates a control signal corresponding to transmission conditions; a transmission data sequence arithmetic processing unit 30 which generates first data and second data on the basis of the control signal; an optical branching unit 40 which branches an optical signal into two optical signals; a first optical modulator 51 which optically modulates one of the branched optical signals on the basis of the first data and outputs the first optical signal; a second optical modulator 52 which optically modulates the other optical signal on the basis of the second data and outputs the second optical signal; and a coupling unit 60 which couples the first optical signal and the second optical signal at a prescribed phase difference φ. The control signal cancels a deviation amount from the phase difference φ.
摘要翻译：要解决的问题：提供一种数字光发射机，光通信系统和数字光传输方法，能够容易地补偿由诸如波长切换和温度波动的传输条件变化引起的IQ不平衡。解决方案：数字光学发射机10包括：IQ平衡控制单元20，其产生对应于传输条件的控制信号; 传输数据序列算术处理单元30，其基于控制信号产生第一数据和第二数据; 光分支单元40，其将光信号分支成两个光信号; 第一光调制器51，其基于第一数据光学地调制分支光信号中的一个，并输出第一光信号; 第二光调制器52，其基于第二数据光调制另一光信号并输出第二光信号; 以及耦合单元60，其以规定的相位差＆phgr。耦合第一光信号和第二光信号。控制信号抵消相位差＆phgr的偏差量。

4. 发明专利

JP2010114730A Decision feedback equalizer 审中-公开
标题翻译：决策反馈均衡器
公开(公告)号：JP2010114730A
公开(公告)日：2010-05-20
申请号：JP2008286497
申请日：2008-11-07
申请人： Nec Corp , 日本電気株式会社
发明人： ABE JUNICHI
IPC分类号： H04B3/06 , H03H21/00 , H04B10/2507 , H04B10/2513 , H04L27/01
摘要： PROBLEM TO BE SOLVED: To solve the problem that, when a waveform of an input signal is different from that of a feedback signal in a conventional decision feedback equalizer, unnecessary inter-code interference occurs and, when signals modulated by various modulation methods such as an RZ signal and an RZ-DPSK signal are input, equalization capability of the equalizer is degraded.
SOLUTION: The decision feedback equalizer 18 executes appropriate waveform equalization without degrading performance by achieving waveform matching between an input signal and a feedback signal when waveforms having various modulation methods such as an RZ waveform and an RZ-DPSK waveform are input.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题为了解决当传统的判决反馈均衡器中输入信号的波形与反馈信号的波形不同的问题时，发生不必要的码间干扰，并且当通过各种调制的信号诸如RZ信号和RZ-DPSK信号的方法被输入，均衡器的均衡能力下降。解决方案：当输入具有诸如RZ波形和RZ-DPSK波形的各种调制方法的波形时，判决反馈均衡器18通过实现输入信号和反馈信号之间的波形匹配来执行适当的波形均衡，而不降低性能。版权所有（C）2010，JPO＆INPIT

5. 发明专利

JP2013081227A Digital receiver and optical communication system using the same 有权
标题翻译：使用数字接收机和光通信系统
公开(公告)号：JP2013081227A
公开(公告)日：2013-05-02
申请号：JP2012268370
申请日：2012-12-07
申请人： Nec Corp , 日本電気株式会社
发明人： ABE JUNICHI , NOGUCHI SHIGESANE
IPC分类号： H04L27/22 , H03M1/10 , H04B10/2507 , H04B10/60 , H04B10/69 , H04L27/38
CPC分类号： H04B10/695 , H03M1/1061 , H03M1/1235 , H04B10/60
摘要： PROBLEM TO BE SOLVED: To provide a digital receiver capable of meeting a requirement for high resolution and high speed with improved effective resolution by appropriate adjustment of an identification level of an AD converter according to reception signal quality.SOLUTION: The digital receiver includes: an AD converter 102 for setting an identification level according to a control signal and for converting an input analog signal into a digital signal on the basis of the set identification level; an identification level adjustment circuit 104 for generating an identification level control signal on the basis of the set value to output to the AD converter; a signal quality monitoring unit 108 for generating a transfer function correction control signal which is information related to the transfer function of the AD converter on the basis of the set value; and a transfer function correction circuit 106 for, based on the transfer function correction control signal, signal processing the digital signal in a manner to cancel a deviation between the transfer function of the AD converter and an initial transfer function.
摘要翻译：要解决的问题：通过根据接收信号质量适当调整AD转换器的识别电平，提供能够通过改进的有效分辨率来满足高分辨率和高速度要求的数字接收机。数字接收机包括：AD转换器102，用于根据控制信号设置识别电平，并根据设定的识别电平将输入的模拟信号转换为数字信号; 识别电平调整电路104，用于根据设定值产生识别电平控制信号以输出到AD转换器; 信号质量监测单元108，用于根据设定值产生与AD转换器的传递函数相关的信息的传递函数校正控制信号; 以及传递函数校正电路106，用于基于传递函数校正控制信号，以消除AD转换器的传递函数和初始传递函数之间的偏差的方式对数字信号进行信号处理。版权所有（C）2013，JPO＆INPIT

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