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    Updating apparatus and method for equalizer coefficient, receiver and optical communication system
    2.
    发明公开
    Updating apparatus and method for equalizer coefficient, receiver and optical communication system 有权
    更新的设备和方法用于Verzerrerkoeffizienten，接收器和光通信系统

    公开(公告)号：EP2709327A2

    公开(公告)日：2014-03-19

    申请号：EP13183503.5

    申请日：2013-09-09

    申请人： FUJITSU LIMITED

    发明人： Dou, Liang ,  Tao, Zhenning

    IPC分类号： H04L25/03 ,  H04B10/00

    CPC分类号： H04B10/25073 ,  H04B10/616 ,  H04B10/6162 ,  H04L25/03006 ,  H04L25/0305 ,  H04L25/03114 ,  H04L2025/03426 ,  H04L2025/03592 ,  H04L2025/0377

    摘要： The present invention provides an updating apparatus and method for an equalizer coefficient, receiver and optical communication system. The updating method comprises: receiving an optical signal transmitted by a transmitter in an optical communication system, the optical signal comprising transmission data and a constant modulus signal for updating a coefficient of an equalization filter; performing coherent detection and analog-to-digital conversion on the optical signal, so as to obtain a digital electric signal; and updating the coefficient of the equalization filter at a symbol corresponding to the constant modulus signal in the digital electric signal. With the embodiments of the present invention, not only the coefficients of the equalizer may be optimized, but also being adapted to signals in various modulation formats, and the complexity of the channel equalization may be lowered as well.

    摘要翻译： 本发明提供关于更新的装置和方法，用于在均衡器系数，接收器和光通信系统中的更新方法包括：。在光学通信系统中由发射机mitted光信号的反式的接收，所述光信号包括发送数据以及恒模信号 用于更新均衡滤波器的系数; 对光信号进行相干检测和模拟 - 数字转换，从而得到数字电信号; 以及更新所述均衡滤波器的系数在一个符号对应于所述数字电信号的恒模信号。 与本发明的实施例，不仅所述均衡器的系数可以被这样优化，但是angepasst以各种调制格式信号，并且所述信道均衡的复杂性可以被降低为好。

    Communication system with a diversity receiver operating with adaptive modulation
    3.
    发明公开
    Communication system with a diversity receiver operating with adaptive modulation 有权
    社区管理系统Diversitätsempfänger，der mit adaptiver调制arbeitet

    公开(公告)号：EP2237463A1

    公开(公告)日：2010-10-06

    申请号：EP10003498.2

    申请日：2010-03-31

    申请人： SIAE Microelettronica S.p.A.

    发明人： Rossi, Leonardo

    IPC分类号： H04L1/00 ,  H04L1/06 ,  H04L25/03 ,  H04B7/08

    CPC分类号： H04L1/0003 ,  H04B7/0845 ,  H04L1/06 ,  H04L25/0305

    摘要： A communication system for adaptive modulation digital radio links operating with diversity, comprising: at least one modulator for supplying a modulated signal; a system for transmitting said modulated signal with diversity; a first demodulator (32) for demodulating a first radio frequency signal (sr1); a second demodulator (35) for demodulating a second radio frequency signal (sr2); said first (sr1) and second (sr2) radio frequency signal carrying the same information; a first adaptive equalizer (40) receiving said first demodulated signal (s1) to provide a first equalized signal (se1); a second adaptive equalizer (42) receiving said second demodulated signal (s2) to provide a second equalized signal (se2); an adder (44) receiving said first (se1) and second (se2) equalized signal to supply a summation signal (ss); an error calculation device (46) which receives said summation signal (ss) and supplies an error indicative signal (49) to said first (40) and second (42) adaptive equalizer, characterised by comprising a single adaptive modulation controller (47) which receives said summation signal (ss) and feeds a single modulation control signal (50, 51) to said at least one modulator.

    摘要翻译： 一种用于具有分集操作的自适应调制数字无线电链路的通信系统，包括：用于提供调制信号的至少一个调制器; 用于以分集发射所述调制信号的系统; 用于解调第一射频信号（sr1）的第一解调器（32）; 用于解调第二射频信号（sr2）的第二解调器（35）; 所述第一（sr1）和第二（sr2）射频信号携带相同的信息; 接收所述第一解调信号（s1）以提供第一均衡信号（se1）的第一自适应均衡器（40）; 接收所述第二解调信号（s2）以提供第二均衡信号（se2）的第二自适应均衡器（42）; 接收所述第一（se1）和第二（se2）均衡信号以提供求和信号（ss）的加法器（44）; 误差计算装置（46），其接收所述求和信号（ss）并向所述第一（40）和第二（42）自适应均衡器提供误差指示信号（49），其特征在于包括单个自适应调制控制器（47） 接收所述求和信号（ss）并将单个调制控制信号（50,51）馈送到所述至少一个调制器。

    COMMUNICATION SYSTEM, TRANSMITTER, RECEIVER, AND MULTIPLE ACCESS METHOD
    5.
    发明公开
    COMMUNICATION SYSTEM, TRANSMITTER, RECEIVER, AND MULTIPLE ACCESS METHOD 审中-公开
    KOMMUNIKATIONSSYSTEM，SENDER，EMPFÄNGERUND MEHRFACHZUGANGSVERFAHREN

    公开(公告)号：EP2037611A1

    公开(公告)日：2009-03-18

    申请号：EP07745366.0

    申请日：2007-06-15

    申请人： NEC Corporation

    发明人： OKELLO, James Awuor

    IPC分类号： H04J15/00 ,  H04B7/04 ,  H04J11/00

    CPC分类号： H04B7/0613 ,  H04B1/7107 ,  H04B7/0837 ,  H04L25/0305 ,  H04L25/03343 ,  H04L25/03866 ,  H04L2025/03407 ,  H04L2025/03426

    摘要： In a communications system including a transmitter for transmitting signals over a transmission channel and a receiver for receiving the signals, the transmitter includes: a filter for filtering a modulated signal to modify amplitude and phase characteristics of the modulated signal; and a first processor for performing interleaving process and/or scrambling process for the filtered signal. On the other hand, the receiver includes: a second processor for performing deinterleaving process and/or descrambling process for a received signal; and an inverse filter for filtering a signal supplied from the second processor.

    摘要翻译： 在包括用于通过传输信道发送信号的发射机和用于接收信号的接收机的通信系统中，发射机包括：滤波器，用于对调制信号进行滤波以修改调制信号的幅度和相位特性; 以及用于对经滤波的信号执行交织处理和/或加扰处理的第一处理器。 另一方面，接收机包括：用于对接收到的信号执行解交织处理和/或解扰处理的第二处理器; 以及用于对从第二处理器提供的信号进行滤波的逆滤波器。

    DATA COMMUNICATION CIRCUIT WITH EQUALIZATION CONTROL
    6.
    发明公开
    DATA COMMUNICATION CIRCUIT WITH EQUALIZATION CONTROL 有权
    与均衡控制数据通信电路

    公开(公告)号：EP1938537A2

    公开(公告)日：2008-07-02

    申请号：EP06809284.0

    申请日：2006-09-12

    申请人： NXP B.V.

    发明人： GERFERS, Friedel ,  DEN BESTEN, Gerrit, W. ,  CONDER, Jim, E. ,  PETKOV, Pavel ,  KOELLMANN, Andreas

    IPC分类号： H04L25/03

    CPC分类号： H04L25/03885 ,  H04L25/0305 ,  H04L2025/03802 ,  H04L2027/0038

    摘要： An adaptive equalizer comprises an adjustable equalizer circuit (10) that allows to enhance the frequency dependence of contents of the transmitted signals which suffer from losses in the connected transmission channel. A blind equalization tuning procedure is proposed that operates without knowledge about the characteristic of transmission channel. Phase positions of transitions in the equalized signal are detected by a transition phase detector (44). A digital post-processing circuit (14) evaluates a measure for spread of the detected phase positions of transitions accumulated over a plurality of the symbol periods. The digital post processing circuit controls the adjustable equalizer, setting the adjustable equalizer to a setting wherein the detected spread is minimized.