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    Hybrid adaptive equalizer for optical communication systems
    21.
    发明公开
    Hybrid adaptive equalizer for optical communication systems 有权
    Hybrider适应者EntzerrerfüroptischeÜbertragungssysteme

    公开(公告)号：EP1392013A2

    公开(公告)日：2004-02-25

    申请号：EP03018174.7

    申请日：2003-08-08

    申请人： MITSUBISHI DENKI KABUSHIKI KAISHA

    发明人： Orlik, Philip ,  Zhang, Jinyun

    IPC分类号： H04B10/18

    CPC分类号： H04B10/6971

    摘要： A method equalizes a received signal in an optical communications system. The received signal is passed through an analog delay line where it is tapped to generate a set of delayed copies of the received signal. In a set of analog multipliers, each delayed copy of the received signal is multiplied by a corresponding weight to generate a set of weighted signals that are then summed to produce an output signal. The output signal is thresholded and subtracted from the output signal to produce an error signal, which is periodically sampled. In a digital weight updating circuit, the weights are produced from digitized versions of the sampled error signal and samples of the delayed copies of the received signal.

    摘要翻译： 一种在光通信系统中均衡接收信号的方法。 接收到的信号通过一个模拟延迟线，在该延迟线处，它被抽头以产生一组接收信号的延迟副本。 在一组模拟乘法器中，将接收信号的每个延迟的副本乘以相应的权重以产生一组加权信号，然后将它们相加以产生输出信号。 输出信号被阈值化并从输出信号中减去以产生周期性采样的误差信号。 在数字加权更新电路中，权重由采样误差信号的数字化版本和接收信号的延迟副本的样本产生。

    CLOCK RECOVERY FOR A CODED LIGHT RECEIVER
    23.
    发明公开
    CLOCK RECOVERY FOR A CODED LIGHT RECEIVER 审中-公开
    时钟恢复为一个编码的光接收器

    公开(公告)号：EP3311508A1

    公开(公告)日：2018-04-25

    申请号：EP16732503.4

    申请日：2016-06-10

    申请人： Philips Lighting Holding B.V.

    发明人： HOEKSTRA, Peter ,  VOS, Benjamin, Johannes ,  BAGGEN, Constant, Paul, Marie, Jozef

    IPC分类号： H04B10/116

    CPC分类号： H04B10/116 ,  H04B10/691 ,  H04B10/6971 ,  H04L7/0012 ,  H04N5/2353 ,  H05B37/0272

    摘要： An apparatus, method and program for receiving a coded light signal comprising a periodically repeating message repeating with a message period. A portion of the message is received in each of a plurality of frames captured by a rolling-shutter camera, with different portions being received in different frames. Using each of a discrete group of trial values of the message period, the respective trial value is used to reconstruct a respective first version of the message from the portions received in a first subset of said frames, and to reconstruct a respective second version of the message from the portions received in a second subset of said frames. For each of the trial values, there is generate a respective value of a measure of similarity between the respective reconstructed first and second versions of the message. An estimate of the message period is determined based on this.

    OPTICAL COMMUNICATION SYSTEMS AND METHODS WITH CROSSTALK CANCELLATION
    24.
    发明授权
    OPTICAL COMMUNICATION SYSTEMS AND METHODS WITH CROSSTALK CANCELLATION 有权
    具有串扰消除的光通信系统和方法

    公开(公告)号：EP2812653B1

    公开(公告)日：2018-04-18

    申请号：EP13746831.0

    申请日：2013-02-06

    申请人： Adtran, Inc.

    发明人： JOFFE, daniel

    IPC分类号： G01C19/68 ,  H04B10/071 ,  H04B10/69

    CPC分类号： H04B10/00 ,  H04B10/071 ,  H04B10/6971

    摘要： An optical system has an optical emitter that transmits an optical signal through an optical fiber. An optical detector detects light from the fiber and provides an analog signal indicative of such light. A crosstalk cancellation element is configured to receive an electrical signal from the optical emitter and to adjust such signal in order to form a cancellation signal that models the optical and/or electrical crosstalk affecting the analog signal. The cancellation signal is subtracted from the analog signal thereby removing optical and/or electrical crosstalk from the analog signal.

    RECEIVER WITH ADAPTIVE EQUALIZER
    25.
    发明授权
    RECEIVER WITH ADAPTIVE EQUALIZER 有权
    具有自适应均衡器的接收器

    公开(公告)号：EP2181501B1

    公开(公告)日：2017-12-20

    申请号：EP08827814.8

    申请日：2008-08-15

    申请人： ARRIS Enterprises LLC

    发明人： MILLER, David, C. ,  RYBA, Marc, J.

    IPC分类号： H04L25/03 ,  H03G3/30 ,  H04B10/69

    CPC分类号： H03G3/3084 ,  H04B10/6971 ,  H04L25/03006

    摘要： Receivers and methods for receiving a signal may result in improved performance by resolving specific impairments at particular levels. For example, bit error ratio (BER) in the downstream signal of an HFC network may be improved by resolving up to 6% AM hum. Thus, the receivers and methods described herein may function with dramatically improved error rates and continuous FEC lock, in relation to conventional receivers, in the presence of SCTE 40 impairments and full channel loading over the receivers entire input dynamic range.

    METHOD AND SYSTEM FOR NON-LINEARITY COMPENSATION IN OPTICAL TRANSMISSION SYSTEMS
    27.
    发明公开
    METHOD AND SYSTEM FOR NON-LINEARITY COMPENSATION IN OPTICAL TRANSMISSION SYSTEMS 有权
    方法和系统的非线性光传输系统中补偿

    公开(公告)号：EP2543150A4

    公开(公告)日：2016-06-29

    申请号：EP11750073

    申请日：2011-03-01

    申请人： OFIDIUM PTY LTD

    发明人： LOWERY ARTHUR JAMES ,  DU LIANG BANGYUAN

    IPC分类号： H04B10/61 ,  H04B10/2507 ,  H04B10/69

    CPC分类号： H04B10/25073 ,  H04B10/6161 ,  H04B10/6163 ,  H04B10/6971

    摘要： An equalizer (200) for equalization of a signal transmitted via an optical fiber link from a transmitter to a corresponding receiver employs a backpropagation model (300) which comprises one or more sequential segments collectively representing an inverse fiber link. Each sequential segment comprises a linear backpropagation element (304), and a non-linear backpropagation element (306) having an associated compensation bandwidth (312). The equalizer (200) generates a distortion-mitigated signal by computing, for each sequential segment in turn, a first linear compensated signal from a signal input to the segment in accordance with the linear backpropagation element (304), and a non-linear compensated signal from the first linear compensated signal in accordance with the non-linear backpropagation element (306). Computation of the non-linear compensation signal comprises limiting a bandwidth of a compensation signal derived from the first linear compensated signal in accordance with the associated compensation bandwidth (312).

    摘要翻译： 经由光纤用于将信号反mitted的均衡的均衡器（200）从发送链接到接收器CORRESPONDING采用反向传播模型（300），其包括一个或多个顺序的段在逆光纤链路共同表示。 每个连续段包括线性反向传播元件（304），以及具有在相关的补偿带宽（312）的非线性元件的反向传播（306）。 均衡器（200）基因利率计算的失真减轻的信号，用于依次在每个连续段，从输入到在雅舞蹈片段与线性反向传播元件（304）的信号的第一线性补偿后的信号，和一个非线性补偿 从与所述非线性元件的反向传播（306）在雅舞蹈第一线性补偿信号的信号。 非线性补偿信号的计算包括限制来自与相关联的补偿带宽（312）在雅舞蹈第一线性补偿信号导出的补偿信号的带宽。

    INTEGRATED CIRCUITS IN OPTICAL RECEIVERS
    28.
    发明公开
    INTEGRATED CIRCUITS IN OPTICAL RECEIVERS 审中-公开
    INTEGRIERTE SCHALTUNGEN在OPTISCHENEMPFÄNGERN

    公开(公告)号：EP2912787A4

    公开(公告)日：2016-06-22

    申请号：EP13851434

    申请日：2013-10-28

    申请人： FINISAR CORP

    发明人： KALOGERAKIS GEORGIOS ,  LI LIONEL ,  NGUYEN THE LINH

    IPC分类号： H04B10/2575 ,  H04B10/61 ,  H04B10/69

    CPC分类号： H04B10/616 ,  H04B10/6971

    摘要： A circuit may include a photodiode configured to receive an optical signal and convert the optical signal to a current signal. The circuit may also include a transimpedance amplifier coupled to the photodiode and configured to convert the current signal to a voltage signal. The circuit may also include an equalizer coupled to the transimpedance amplifier and configured to equalize the voltage signal to at least partially compensate for a loss of a high frequency component of the optical signal. The equalizer and the transimpedance amplifier may be housed within a single integrated circuit.

    摘要翻译： 电路可以包括被配置为接收光信号并将光信号转换成电流信号的光电二极管。 电路还可以包括耦合到光电二极管并被配置为将电流信号转换成电压信号的跨阻放大器。 电路还可以包括耦合到跨阻抗放大器的均衡器，并且被配置为均衡电压信号以至少部分地补偿光信号的高频分量的损耗。 均衡器和跨阻放大器可以容纳在单个集成电路内。