公开(公告)号：EP2763366B1

公开(公告)日：2018-08-22

申请号：EP13193437.4

申请日：2013-11-19

申请人： FUJITSU LIMITED

发明人： Saito, Taku ,  Koizumi, Nobukazu ,  Nakashima, Hisao ,  Takeuchi, Osamu ,  Araki, Hirofumi

IPC分类号： H04L25/03 ,  H04B10/61

CPC分类号： H04L25/03 ,  H04B10/60 ,  H04L25/03044

摘要： A method of tap coefficient correction includes: obtaining a synchronization symbol difference between a first polarization and a second polarization orthogonal to the first polarization; obtaining a delay amount of each of the first polarization and the second polarization in an adaptive equalizer; calculating, in a case where a horizontal axis represents a tap number and a vertical axis represents a tap coefficient and a tap number or a nearest tap number with which an area of a drawn figure is halved is set as a gravity center of tap coefficients, a correction reference gravity center of the tap coefficients set in the adaptive equalizer, based on the synchronization symbol difference and the delay amount; and performing a correction of shifting an entire tap coefficients in units of symbol to cause the correction reference gravity center to be closest to a tap center.

公开(公告)号：EP2763366A2

公开(公告)日：2014-08-06

申请号：EP13193437.4

申请日：2013-11-19

申请人： FUJITSU LIMITED

发明人： Saito, Taku ,  Koizumi, Nobukazu ,  Nakashima, Hisao ,  Takeuchi, Osamu ,  Araki, Hirofumi

IPC分类号： H04L25/03

CPC分类号： H04L25/03 ,  H04B10/60 ,  H04L25/03044

摘要： A method of tap coefficient correction includes: obtaining a synchronization symbol difference between a first polarization and a second polarization orthogonal to the first polarization; obtaining a delay amount of each of the first polarization and the second polarization in an adaptive equalizer; calculating, in a case where a horizontal axis represents a tap number and a vertical axis represents a tap coefficient and a tap number or a nearest tap number with which an area of a drawn figure is halved is set as a gravity center of tap coefficients, a correction reference gravity center of the tap coefficients set in the adaptive equalizer, based on the synchronization symbol difference and the delay amount; and performing a correction of shifting an entire tap coefficients in units of symbol to cause the correction reference gravity center to be closest to a tap center.

摘要翻译： 抽头系数校正的方法包括：获得与第一偏振正交的第一偏振和第二偏振之间的同步符号差; 在自适应均衡器中获得每个第一偏振和第二偏振的延迟量; 在水平轴表示抽头号并且垂直轴表示抽头数字的面积减半的抽头系数和抽头数或抽头数或最近抽头数的情况下，将其设为抽头系数的重心， 基于同步符号差和延迟量，在自适应均衡器中设置的抽头系数的校正基准重心; 并且执行以符号为单位移位整个抽头系数的校正，以使校正基准重心最靠近抽头中心。

公开(公告)号：EP3247057A1

公开(公告)日：2017-11-22

申请号：EP17170815.9

申请日：2017-05-12

申请人： Fujitsu Limited

发明人： Matsushita, Shuzo ,  Saito, Taku ,  Komaki, Kosuke ,  Sugamoto, Masamichi ,  Hongou, Hironobu

IPC分类号： H04B10/50 ,  G02F1/225

摘要： There is provided an optical transmitter including a signal generator to generate an electric signal, an optical generator to generate light, an optical modulator to modulate the light with the electric signal to create an optical signal, a first voltage electrode to apply a first voltage to the optical signal, a second voltage electrode to apply a second voltage to the optical signal to which the first voltage is applied, and a detector to detect an optical power of the optical signal to which the second voltage is applied, wherein the signal generator stops generating the electric signal, controls the first voltage electrode to change the first voltage after the stop of generating the electric signal, and controls the second voltage electrode to change the second voltage according to the detected optical power after the change of the first voltage.

摘要翻译： 提供了一种光发射器，其包括用于产生电信号的信号发生器，用于产生光的光发生器，用电信号调制光以产生光信号的光调制器，用于将第一电压施加到 光信号;第二电压电极，用于向施加有第一电压的光信号施加第二电压;以及检测器，用于检测施加有第二电压的光信号的光功率，其中信号发生器停止 产生电信号，控制第一电压电极在停止产生电信号之后改变第一电压，并且控制第二电压电极根据在第一电压改变之后检测到的光功率改变第二电压。

公开(公告)号：EP2763366A3

公开(公告)日：2014-08-20

申请号：EP13193437.4

申请日：2013-11-19

申请人： FUJITSU LIMITED

发明人： Saito, Taku ,  Koizumi, Nobukazu ,  Nakashima, Hisao ,  Takeuchi, Osamu ,  Araki, Hirofumi

IPC分类号： H04L25/03 ,  H04B10/61

CPC分类号： H04L25/03 ,  H04B10/60 ,  H04L25/03044

摘要： A method of tap coefficient correction includes: obtaining a synchronization symbol difference between a first polarization and a second polarization orthogonal to the first polarization; obtaining a delay amount of each of the first polarization and the second polarization in an adaptive equalizer; calculating, in a case where a horizontal axis represents a tap number and a vertical axis represents a tap coefficient and a tap number or a nearest tap number with which an area of a drawn figure is halved is set as a gravity center of tap coefficients, a correction reference gravity center of the tap coefficients set in the adaptive equalizer, based on the synchronization symbol difference and the delay amount; and performing a correction of shifting an entire tap coefficients in units of symbol to cause the correction reference gravity center to be closest to a tap center.

公开(公告)号：EP3247057B1

公开(公告)日：2020-02-19

申请号：EP17170815.9

申请日：2017-05-12

申请人： Fujitsu Limited

发明人： Matsushita, Shuzo ,  Saito, Taku ,  Komaki, Kosuke ,  Sugamoto, Masamichi ,  Hongou, Hironobu

IPC分类号： H04B10/50 ,  G02F1/225

公开(公告)号：EP2811669B1

公开(公告)日：2019-01-02

申请号：EP14169974.4

申请日：2014-05-27

申请人： FUJITSU LIMITED

发明人： Saito, Taku ,  Fukumitsu, Katsumi ,  Takeuchi, Osamu ,  Araki, Hirofumi ,  Naito, Kanji ,  Murakami, Shoichi

IPC分类号： H04B10/61 ,  H04L27/38 ,  H04L27/20 ,  H04L27/22 ,  H04B10/079

公开(公告)号：EP2811669A1

公开(公告)日：2014-12-10

申请号：EP14169974.4

申请日：2014-05-27

申请人： FUJITSU LIMITED ,  Fujitsu Telecom Networks Limited

发明人： Saito, Taku ,  Fukumitsu, Katsumi ,  Takeuchi, Osamu ,  Araki, Hirofumi ,  Naito, Kanji ,  Murakami, Shoichi

IPC分类号： H04B10/61 ,  H04L27/38

CPC分类号： H04B10/0795 ,  H04B10/6165 ,  H04L27/2053 ,  H04L27/223

摘要： An optimization unit(44) in an optical receiver(3) divides a symbol region out of a plurality of symbol regions(C1 to C4) into which signal points that specifies symbol information included in an optical signal are classified, into a plurality of division regions(B1 to B4) from the symbol center coordinate of the symbol region. Moreover, the optimization unit accumulates the signal points of the symbol information for every division region in the symbol region. Furthermore, based on the accumulated number of signal points for every division region, the optimization unit controls the average length of a phase estimation unit(41) when the phase noise of the optical signal is calculated.

摘要翻译： 光接收器（3）中的优化单元（44）将指定包括在光信号中的符号信息的信号点分类的多个符号区域（C1至C4）中的符号区域划分成多个分区 从符号区域的符号中心坐标的区域（B1至B4）。 此外，优化单元对于符号区域中的每个划分区域累积符号信息的信号点。 此外，基于每个划分区域的累积信号点数，当计算出光信号的相位噪声时，优化单元控制相位估计单元（41）的平均长度。