公开(公告)号：EP3107227B1

公开(公告)日：2019-05-01

申请号：EP14885881.4

申请日：2014-11-19

申请人： Nippon Telegraph and Telephone Corporation

发明人： OHARA Takuya ,  KITAMURA Kei ,  KISAKA Yoshiaki ,  AISAWA Shigeki ,  SUZUKI Masahiro ,  YAMAZAKI Etsushi ,  KATAOKA Tomoyoshi ,  TOMIZAWA Masahito ,  YAMADA Yoshiaki ,  TESHIMA Mitsuhiro ,  HIRANO Akira

IPC分类号： H04J3/16 ,  H04J14/00

公开(公告)号：EP3965319A1

公开(公告)日：2022-03-09

申请号：EP19931946.8

申请日：2019-06-06

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： NAKAMURA Masanori ,  OKAMOTO Seiji ,  HORIKOSHI Kengo ,  YAMAMOTO Shuto ,  KOBAYASHI Takayuki ,  KISAKA Yoshiaki ,  TOMIZAWA Masahito

IPC分类号： H04B10/2513 ,  H04B10/61

摘要： An electric digital received signal obtained from a received optical signal is segmented into blocks of a certain length with an overlap of a length determined in advance with an adjacent block. Fourier transformation is performed for each of the blocks. The blocks subjected to the Fourier transformation are stored consecutively in time series, a coefficient determined based on a wavelength dispersion compensation amount according to one of frequency positions and a delay amount according to one of the frequency positions and one of time positions is applied to each of frequency component values included in a plurality of the stored blocks, and the blocks to which the coefficient has been applied and which are obtained by adding up the frequency component values to which the coefficient has been applied for each of the frequency positions are generated. Inverse Fourier transformation is performed on the generated blocks to which the coefficient has been applied. A part of the overlap subjected to the inverse Fourier transformation is removed.

公开(公告)号：EP2942917A1

公开(公告)日：2015-11-11

申请号：EP14752142.1

申请日：2014-02-13

申请人： Nippon Telegraph and Telephone Corporation

发明人： YOSHIDA Mitsuteru ,  YAMAZAKI Etsushi ,  OKAMOTO Seiji ,  UZAWA Hiroyuki ,  HORIKOSHI Kengo ,  ISHIHARA Koichi ,  KOBAYASHI Takayuki ,  KISAKA Yoshiaki ,  TOMIZAWA Masahito ,  FUJIWARA Naoki ,  KATAOKA Tomoyoshi ,  YONENAGA Kazushige

IPC分类号： H04L27/38 ,  H04B10/2507 ,  H04B10/61

CPC分类号： H04B10/6165 ,  H04B10/2507 ,  H04B10/516 ,  H04B10/61 ,  H04J14/06 ,  H04L27/38 ,  H04L2027/0067 ,  H04L2027/0095

摘要： An increase in circuit scale is suppressed and a phase variation caused in a transmission path or the like is compensated for. An optical transmission system includes: a pilot symbol detection unit which detects a plurality of pilot symbols intermittently inserted into a received complex electric field signal that is obtained through coherent detection for a received optical signal; an error signal computation unit which calculates a complex electric field error signal indicating a phase variation at each pilot symbol based on the pilot symbols detected by the pilot symbol detection unit and a predetermined reference symbol; a compensation electric field signal generation unit which estimates a phase variation between the pilot symbols in the received complex electric field signal using filter processing based on the complex electric field error signal calculated by the error signal computation unit; and a phase noise compensation unit which performs phase compensation for the received complex electric field signal based on the phase variation between the pilot symbols estimated by the compensation electric field signal generation unit.

摘要翻译： 抑制电路规模的增加，并补偿在传输路径等中引起的相位变化。 光传输系统包括：导频符号检测单元，其检测间接插入到通过接收的光信号的相干检测获得的接收复电场信号中的多个导频符号; 误差信号计算单元，其基于由导频符号检测单元检测的导频符号和预定的参考符号来计算指示每个导频符号的相位变化的复电场误差信号; 补偿电场信号生成单元，其基于由所述误差信号计算单元计算出的复电场误差信号，使用滤波处理来估计所述接收复电场信号中的导频符号之间的相位变化; 以及相位噪声补偿单元，其基于由补偿电场信号生成单元估计的导频符号之间的相位变化，对接收到的复数电场信号进行相位补偿。

公开(公告)号：EP3107227A1

公开(公告)日：2016-12-21

申请号：EP14885881.4

申请日：2014-11-19

申请人： Nippon Telegraph and Telephone Corporation

发明人： OHARA Takuya ,  KITAMURA Kei ,  KISAKA Yoshiaki ,  AISAWA Shigeki ,  SUZUKI Masahiro ,  YAMAZAKI Etsushi ,  KATAOKA Tomoyoshi ,  TOMIZAWA Masahito ,  YAMADA Yoshiaki ,  TESHIMA Mitsuhiro ,  HIRANO Akira

IPC分类号： H04J3/00

CPC分类号： H04B10/40 ,  H04B10/27 ,  H04B10/5161 ,  H04B10/60 ,  H04J3/00 ,  H04J3/1652 ,  H04J14/00

摘要： A transport apparatus includes: a client signal transceiving unit which transceives a client signal; a line signal transceiving unit which performs electric-optic conversion on a line signal to be transmitted, transmits an optical line signal, performs optic-electric conversion on a received line signal, and outputs an electrical line signal; and a plurality of signal processing units which perform signal processing on the client signal to generate the line signal to be transmitted and perform signal processing on the electrical line signal to generate the client signal. Each of the plurality of signal processing units includes a signal transceiving unit which performs transfer of a branched signal obtained by branching a signal to be transmitted and a merged signal obtained by merging received signals with another signal processing unit, and the signal transceiving unit of each of the plurality of signal processing units and the signal transceiving unit of the other signal processing unit are coupled via an inter-chip wiring.

摘要翻译： 传送装置包括：客户端信号收发单元，收发客户端信号; 对要发送的线路信号进行电光转换的线路信号收发单元，发送光线路信号，对接收的线路信号进行光电转换，并输出电线信号; 以及多个信号处理单元，其对客户端信号执行信号处理，以生成要发送的线路信号，并对电线信号执行信号处理以产生客户端信号。 多个信号处理单元中的每一个包括信号收发单元，该信号收发单元执行通过将要发送的信号进行分支而获得的分支信号和通过将接收信号与另一个信号处理单元合并而获得的合并信号的传送，并且每个信号收发单元 的多个信号处理单元和另一个信号处理单元的信号收发单元经由芯片间布线耦合。

公开(公告)号：EP3094015A1

公开(公告)日：2016-11-16

申请号：EP15765440.1

申请日：2015-03-17

申请人： Nippon Telegraph and Telephone Corporation

发明人： OKAMOTO Seiji ,  ISHIHARA Koichi ,  YAMAZAKI Etsushi ,  YOSHIDA Mitsuteru ,  KATAOKA Tomoyoshi ,  YONENAGA Kazushige ,  KISAKA Yoshiaki ,  NAKAMURA Masanori ,  TOMIZAWA Masahito

IPC分类号： H04B10/077 ,  H04B10/2513 ,  H04B10/516 ,  H04J11/00 ,  H04L27/20 ,  H04L27/36

摘要： An optical signal transmission apparatus includes a modulation unit which modulates a transmission signal, a training signal sequence generation unit which generates a plurality of signal sequences having power concentrated in a plurality of different frequency bands, at least one of an amplitude and a phase of the plurality of signal sequences being modulated, as a training signal sequence, a signal multiplexing unit which appends the training signal sequence to the transmission signal, and an electro-optical conversion unit which converts a signal sequence obtained by appending the training signal sequence to the transmission signal into an optical signal and transmits the optical signal.

摘要翻译： 光信号传输装置包括：调制单元，其对发送信号进行调制;训练信号序列生成单元，生成具有集中在多个不同频带的功率的多个信号序列，所述训练信号序列生成单元的振幅和相位中的至少一个 多个信号序列作为训练信号序列被调制为将训练信号序列附加到传输信号的信号复用单元，以及电光转换单元，其将通过将训练信号序列附加到传输获得的信号序列 信号转换为光信号并发送光信号。

公开(公告)号：EP2978145A1

公开(公告)日：2016-01-27

申请号：EP14768156.3

申请日：2014-03-14

申请人： Nippon Telegraph and Telephone Corporation

发明人： KISAKA Yoshiaki ,  ISHIHARA Koichi ,  TOMIZAWA Masahito ,  YAMAZAKI Etsushi

IPC分类号： H04B10/077 ,  H04J11/00 ,  H04J14/00 ,  H04J14/04 ,  H04J14/06 ,  H04J14/08

CPC分类号： H04J14/06 ,  H04B10/077 ,  H04B10/50 ,  H04B10/516 ,  H04B10/532 ,  H04B10/614 ,  H04B10/6162 ,  H04L27/2096

摘要： An optical transmission and reception system includes a transmitter (10) and receiver (20). The transmitter (10) differentially encodes control information to generate a differentially coded signal; uses the differentially coded signal to modulate a signal sequence in which electric power concentrates at a particular frequency; applies time-division multiplexing on a primary signal in one of two polarized wave components, and applies time-division multiplexing on a primary signal in the other polarized wave components and the signal sequence itself; polarization-multiplexes the both of the time-division multiplexed polarized waves into an optical signal; and transmits the optical signal to the receiver (20).
The receiver (20) polarization-demultiplexes the received optical signal to generate two polarized wave signals; extracts the signal sequence in which electric power concentrates at the particular frequency from the two polarized wave signals; and applies differential detection on the extracted signal sequence to demodulate the control information.

摘要翻译： 光传输和接收系统包括发射机（10）和接收机（20）。 发射机（10）差分编码控制信息以产生差分编码的信号; 使用差分编码信号来调制电力集中在特定频率的信号序列; 对两个极化波分量之一的主信号进行时分复用，对其他极化波分量和信号序列本身的主信号进行时分复用; 将时分复用偏振波的两个偏振复用为光信号; 并将光信号发送到接收器（20）。 接收器（20）对所接收的光信号进行偏振解复用以产生两个偏振波信号; 从两个极化波信号中提取电力集中在特定频率的信号序列; 对所提取的信号序列应用差分检测来解调控制信息。

公开(公告)号：EP3876471A1

公开(公告)日：2021-09-08

申请号：EP19896696.2

申请日：2019-12-04

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： INUZUKA Fumikazu ,  KITAMURA Kei ,  HIRANO Akira ,  TOMIZAWA Masahito ,  OHARA Takuya

IPC分类号： H04L7/00 ,  H04L12/70

摘要： A first reception processing unit performs a process of receiving a first signal transmitted on a first transmission line, a second reception processing unit performs a process of receiving a second signal transmitted on a second transmission line, and an output speed control unit controls output speeds of the first signal and the second signal subjected to the reception process. A system switching unit selects and outputs the first signal or the second signal subjected to a reception process, and an output processing unit performs a process for output to another apparatus on the output from the system switching unit. A reception side clock output unit outputs a clock signal giving a processing timing of each process, and a clock frequency control unit adjusts a frequency of the clock signal giving the processing timing to the output processing unit. A frequency adjustment range calculation unit calculates an adjustment range of the frequency based on frequency deviation accuracy of the reception side clock output unit, frequency deviation accuracy of a transmission side clock output unit that outputs a clock signal giving a processing timing to a transmission process at a transmission apparatus on the transmission side, and a prescribed value of a frequency deviation.

公开(公告)号：EP3094015B1

公开(公告)日：2019-11-20

申请号：EP15765440.1

申请日：2015-03-17

申请人： Nippon Telegraph and Telephone Corporation

发明人： OKAMOTO Seiji ,  ISHIHARA Koichi ,  YAMAZAKI Etsushi ,  YOSHIDA Mitsuteru ,  KATAOKA Tomoyoshi ,  YONENAGA Kazushige ,  KISAKA Yoshiaki ,  NAKAMURA Masanori ,  TOMIZAWA Masahito

IPC分类号： H04B10/077 ,  H04B10/2513 ,  H04B10/516 ,  H04J11/00 ,  H04L27/20 ,  H04L27/36 ,  H04B10/2557 ,  H04L27/34

公开(公告)号：EP2978145B1

公开(公告)日：2018-04-25

申请号：EP14768156.3

申请日：2014-03-14

申请人： Nippon Telegraph and Telephone Corporation

发明人： KISAKA Yoshiaki ,  ISHIHARA Koichi ,  TOMIZAWA Masahito ,  YAMAZAKI Etsushi

IPC分类号： H04B10/61 ,  H04B10/50 ,  H04B10/516 ,  H04L27/20

CPC分类号： H04J14/06 ,  H04B10/077 ,  H04B10/50 ,  H04B10/516 ,  H04B10/532 ,  H04B10/614 ,  H04B10/6162 ,  H04L27/2096

摘要： An optical transmission and reception system includes a transmitter (10) and receiver (20). The transmitter (10) differentially encodes control information to generate a differentially coded signal; uses the differentially coded signal to modulate a signal sequence in which electric power concentrates at a particular frequency; applies time-division multiplexing on a primary signal in one of two polarized wave components, and applies time-division multiplexing on a primary signal in the other polarized wave components and the signal sequence itself; polarization-multiplexes the both of the time-division multiplexed polarized waves into an optical signal; and transmits the optical signal to the receiver (20). The receiver (20) polarization-demultiplexes the received optical signal to generate two polarized wave signals; extracts the signal sequence in which electric power concentrates at the particular frequency from the two polarized wave signals; and applies differential detection on the extracted signal sequence to demodulate the control information.

公开(公告)号：EP2930864A1

公开(公告)日：2015-10-14

申请号：EP14740258.0

申请日：2014-01-15

申请人： Nippon Telegraph and Telephone Corporation

发明人： ISHIHARA Koichi ,  MIZOGUCHI Masato ,  MURAKAMI Tomoki ,  KATAOKA Tomoyoshi ,  KISAKA Yoshiaki ,  NAKAGAWA Tadao ,  YAMAZAKI Etsushi ,  OKAMOTO Seiji ,  HORIKOSHI Kengo ,  TOMIZAWA Masahito ,  KUDO Riichi

IPC分类号： H04B10/2513 ,  H04B10/516 ,  H04B10/61

CPC分类号： H04J14/08 ,  H04B10/0775 ,  H04B10/2513 ,  H04B10/25133 ,  H04B10/516 ,  H04B10/61 ,  H04B10/6161 ,  H04B10/697 ,  H04B2210/072 ,  H04J3/14

摘要： The estimation of an amount of chromatic dispersion using a training signal sequence is possible. A transmission method includes: a training signal sequence generation step of generating, as training signal sequences, a plurality of signal sequences having power concentrated in a plurality of frequency bands, the power concentrated at different frequency bands; a training signal sequence selection step of selecting at least one training signal sequence from among the plurality of training signal sequences generated in the training signal sequence generation step, a signal multiplexing step of generating a signal sequence obtained by time-division multiplexing the training signal sequence selected in the training signal sequence selection step with a transmission data sequence, and an electrical-to-optical conversion step of transmitting the signal sequence generated in the signal multiplexing step as an optical signal.