利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

26 条记录 (耗时 0.021 秒)

    WAVELENGTH DISPERSION AMOUNT CALCULATION DEVICE, OPTICAL SIGNAL RECEPTION DEVICE, OPTICAL SIGNAL TRANSMISSION DEVICE, AND WAVELENGTH DISPERSION AMOUNT CALCULATION METHOD
    1.
    发明公开
    WAVELENGTH DISPERSION AMOUNT CALCULATION DEVICE, OPTICAL SIGNAL RECEPTION DEVICE, OPTICAL SIGNAL TRANSMISSION DEVICE, AND WAVELENGTH DISPERSION AMOUNT CALCULATION METHOD 有权
    装置：用于光信号的实用计算的波长色散量的转让和方法计算的波长色散量，接收装置中，DEVICE

    公开(公告)号：EP2456097A1

    公开(公告)日：2012-05-23

    申请号：EP10799861.9

    申请日：2010-07-14

    申请人： Nippon Telegraph And Telephone Corporation

    发明人： ISHIHARA Koichi ,  KOBAYASHI Takayuki ,  KUDO Riichi ,  TAKATORI Yasushi ,  MATSUI Munehiro ,  MIZOGUCHI Masato ,  NAKAGAWA Tadao ,  YAMAZAKI Etsushi ,  SANO Akihide ,  MIYAMOTO Yutaka ,  YOSHIDA Eiji ,  YAMANAKA Shogo

    IPC分类号： H04B10/02 ,  H04B3/06 ,  H04B10/18

    CPC分类号： H04B10/0775 ,  H04B3/06 ,  H04B10/25133

    摘要： In order to compensate for chromatic dispersion caused by optical fiber transmission in a communication system with coherent detection using optical signals, specific frequency band signals are used to enable estimation of a chromatic dispersion value. The chromatic dispersion value calculating apparatus is provided with: a signal distributing circuit which distributes, into a plurality of signal sequences, an electrical digital signal converted from received optical signals of an optical signal transmitted by an optical signal transmitting apparatus, in which a known signal with concentrated frequency components of a plurality of specific frequencies is appended to a signal generated from a transmission data sequence; a plurality of frequency band pass filter circuits, each of which separating only each of a plurality of specific frequency components in which the known signal is included from each of the signal sequences distributed by the signal distributing circuit, and passing each of the specific frequency components therethrough; a plurality of power calculating circuits which are provided so as to correspond respectively to the plurality of frequency band pass filter circuits and which calculate power values of signals output from the corresponding frequency band pass filter circuits; a delay time calculating circuit which detects times at which power has the maximum value or times at which the power exceeds a predetermined threshold value, respectively from signal sequences of the power values output from the plurality of power calculating circuits, and which compares the detected times; and a chromatic dispersion value calculating circuit which calculates a chromatic dispersion value based on a comparison result of the times by the delay time calculating circuit.

    摘要翻译： 为了补偿色散光纤通过传输与使用的光信号相干检测的通信系统中引起的，特定频带信号被用于使色散值的估计。 波长色散值计算装置设置有：信号分配电路用于分配成信号序列从由在光信号发送装置mitted的光信号的反式的接收的光信号转换电数字信号，多个在其中的已知信号 与被附加到从发送数据序列而生成的信号的特定频率的多个频率分量集中; 频率的带通滤波器电路的复数，每个的其中仅分离每个在其中已知信号从由所述信号分配的信号序列包括分配电路特定频率分量的多个，并且每个传递的特定频率分量的 那里通过; 的功率计算提供哪些电路，以便分别对应于频率带通滤波电路的多元性并且计算从相应的频率的带通滤波器电路的输出信号的功率值的多个; 其中在哪个功率检测时间的延迟时间计算电路具有最大值或倍其中功率从功率计算电路的所述多个输出的功率值的信号序列超过预定阈值，分别和其比较所检测到的次 ; 和色散值计算电路，其计算基于由所述延迟时间计算电路的时间的比较结果的色散值。

    OPTICAL TRANSMISSION SYSTEM, SIGNAL QUALITY MEASUREMENT DEVICE, AND SIGNAL QUALITY MEASUREMENT METHOD
    2.
    发明公开
    OPTICAL TRANSMISSION SYSTEM, SIGNAL QUALITY MEASUREMENT DEVICE, AND SIGNAL QUALITY MEASUREMENT METHOD 审中-实审

    公开(公告)号：EP4415285A1

    公开(公告)日：2024-08-14

    申请号：EP21956703.9

    申请日：2021-09-07

    申请人： Nippon Telegraph And Telephone Corporation

    发明人： NAKAMURA Masanori ,  YAMAZAKI Hiroshi ,  KOBAYASHI Takayuki ,  HAMAOKA Fukutaro ,  MIYAMOTO Yutaka

    IPC分类号： H04B10/079

    CPC分类号： H04B10/079

    摘要： A transmission apparatus repeatedly inserts reference signal sequences into a transmission signal sequence at different timings, and converts the transmission signal sequence, into which the reference signal sequences are inserted, into an optical signal. The reception apparatus includes a detection unit, a waveform equalization unit, and a signal quality measurement unit. The detection unit receives the optical signal transmitted through an optical transmission line, and converts the received optical signal into a reception signal of an electrical signal. The waveform equalization unit performs waveform equalization on the reception signal converted into the electrical signal. The signal quality calculation unit extracts a reception signal sequence set in each section corresponding to the reference signal sequence from the received signal on which waveform equalization performed. For each combination of different sections, the signal quality calculation unit calculates a mean square error between the mean of the reception signal sequences set in the sections included in a combination and the reference signal sequence, and calculates a signal-to-noise ratio and a signal-to-distortion ratio of the reception signal using the mean square error calculated for each combination.

    COMMUNICATION SYSTEM AND CONNECTOR
    5.
    发明公开
    COMMUNICATION SYSTEM AND CONNECTOR 审中-公开

    公开(公告)号：EP3364568A1

    公开(公告)日：2018-08-22

    申请号：EP16868565.9

    申请日：2016-11-22

    申请人： Nippon Telegraph and Telephone Corporation

    发明人： ODA Takuya ,  INUI Tetsuro ,  HIRANO Akira ,  IMAJUKU Wataru ,  KOBAYASHI Shoukei ,  TANAKA Takafumi ,  MIYAMOTO Yutaka ,  TAKARA Hidehiko

    IPC分类号： H04B10/27 ,  G02B6/26

    摘要： A communication system includes three or more nodes and a multi-core fiber having a plurality of cores, the multi-core fiber being used in at least a partial segment of the connection between the nodes is provided. One node of the nodes is connected to the multi-core fiber and includes a connector configured to add and drop a signal to and from an allocated core exclusively allocated from among the cores as a communication path between the one node and another node of the nodes and/or configured to relay a signal transmitted through another core of the cores allocated for communication between other nodes in the multi-core fiber connected to the one node, and a relative positional relationship between a connection position of the allocated core in which a signal is added or dropped in the connector and a connection position of another core in which a signal is relayed in the connector is the same for all of the nodes connected to the multi-core fiber.

    OPTICAL TRANSMISSION SYSTEM, TRANSMISSION DEVICE, AND CONTROL METHOD
    6.
    发明公开
    OPTICAL TRANSMISSION SYSTEM, TRANSMISSION DEVICE, AND CONTROL METHOD 审中-实审

    公开(公告)号：EP4412115A1

    公开(公告)日：2024-08-07

    申请号：EP21959292.0

    申请日：2021-09-29

    申请人： Nippon Telegraph And Telephone Corporation

    发明人： KAWAI Akira ,  KOBAYASHI Takayuki ,  NAKAMURA Masanori ,  SHIMIZU Shimpei ,  MIYAMOTO Yutaka

    IPC分类号： H04J14/04

    CPC分类号： H04J14/04

    摘要： One aspect of the present invention is an optical transmission system including a transmitter connected to a transmission line having M spatial channels, and a receiver that receives a signal transmitted from the transmitter via the transmission line, wherein the transmitter includes: an allocator that allocates a transmission bit string transmitted to the transmission line into a bit string serving as a basic signal and a bit string serving as spatial channel information; a generator that generates N (M>N) signals from the bit string serving as the basic signal allocated by the allocator; and a selector that selects N spatial channels, through which the N signals generated by the generator are transmitted, from the M spatial channels on the basis of the bit string serving as the spatial channel information allocated by the allocator.