公开(公告)号：US20170070296A1

公开(公告)日：2017-03-09

申请号：US15122582

申请日：2015-03-17

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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

IPC: H04B10/516 ,  H04B10/508

CPC classification number: H04B10/516 ,  H04B10/0775 ,  H04B10/2513 ,  H04B10/2557 ,  H04B10/508 ,  H04L27/3455 ,  H04L27/3483 ,  H04L27/366

Abstract: 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.

Abstract translation: 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：US20160205451A1

公开(公告)日：2016-07-14

申请号：US15080282

申请日：2016-03-24

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Kazushige YONENAGA ,  Hidehiko TAKARA ,  Masahiko JINNO ,  Kohki SHIBAHARA ,  Takashi GOH

IPC: H04Q11/00 ,  H04J14/02 ,  H04B10/572 ,  H04B10/40 ,  H04B10/516

CPC classification number: H04Q11/0003 ,  H04B10/40 ,  H04B10/506 ,  H04B10/516 ,  H04B10/572 ,  H04J14/02 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/021 ,  H04J14/0212 ,  H04J14/0224 ,  H04J14/026 ,  H04L27/2697 ,  H04Q11/0005 ,  H04Q2011/0035

Abstract: There is provided a multi-flow optical transceiver that includes (a) a plurality of wavelength-tunable light sources, (b) a plurality of optical modulation units which modulates light with an input signal, (c) an optical multiplexing/demultiplexing switch which couples light from at least one of the wavelength-tunable light sources to at least one of the optical modulation units with any power, (d) an optical coupling unit which couples a plurality of lights, modulated by a plurality of the optical modulation units, to at least one waveguide, (e) at least one multiple carrier generating unit which generates multiple carries, arranged at equal frequency intervals, from light of the wavelength-tunable light source, and (f) a wavelength separation unit which branches the multiple carriers from the multiple carrier generating unit for each wavelength.

Abstract translation: 提供了一种多流量光收发器，其包括（a）多个波长可调光源，（b）多个光调制单元，其用输入信号调制光;（c）光复用/解复用开关， 将光从至少一个波长可调光源耦合到具有任何功率的至少一个光调制单元;（d）耦合由多个光调制单元调制的多个光的光耦合单元， 至少一个波导，（e）至少一个多载波产生单元，其从所述波长可调光源的光产生以相等的频率间隔布置的多个载波，以及（f）分支所述多个载波的波长分离单元 对于每个波长从多载波产生单元。

公开(公告)号：US20150372766A1

公开(公告)日：2015-12-24

申请号：US14766635

申请日：2014-02-13

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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

IPC: H04B10/61 ,  H04B10/2507 ,  H04J14/06 ,  H04B10/516

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

Abstract: 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.

Abstract translation: 抑制电路规模的增加，并且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，其检测间歇地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，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，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。