利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

39 条记录 (耗时 0.014 秒)

    Transmission system comprising receiver with improved timing means
    7.
    发明公开
    Transmission system comprising receiver with improved timing means 失效
    ÜbertragungssystemmitEmpfängermit verb desserten Taktmitteln。

    公开(公告)号：EP0624012A1

    公开(公告)日：1994-11-09

    申请号：EP94201229.5

    申请日：1994-05-03

    申请人： PHILIPS ELECTRONICS N.V.

    发明人： Bergmans, Johannes Wilhelmus Maria ,  Wong-Lam, Ho Wai

    IPC分类号： H04L7/02

    CPC分类号： H04L7/0062

    摘要： In a digital symbol receiver (6) it is necessary to generate a clock signal with a correct frequency and phase, so that decisions â k about the value of transmitted symbols a k can be made at the right detection instants. A simple method of obtaining the desired clock signal is adjusting a VCO by means of a control signal obtained from the correlation of a detection signal r(t) with the detected symbols â k filtered by a symbol filter (11). The symbol filter (11) may comprise a cascade connection of a differentiator (16) and a filter (18) which has a transfer function which is an estimate of the transfer function of the channel.

    摘要翻译： 在数字符号接收器（6）中，需要产生具有正确频率和相位的时钟信号，从而可以在正确的检测时刻进行关于发送符号ak的值的决定。 获得期望的时钟信号的简单方法是通过从检测信号r（t）与由符号滤波器（11）滤波的检测符号相关而获得的控制信号来调节VCO。 符号滤波器（11）可以包括微分器（16）和滤波器（18）的级联连接，滤波器具有作为信道的传递函数的估计的传递函数。

    Decision feedback equalisation system with low error propagation
    10.
    发明公开
    Decision feedback equalisation system with low error propagation 失效
    具有低误差传播的决策反馈均衡系统

    公开(公告)号：EP0549019A3

    公开(公告)日：1993-09-22

    申请号：EP92203762.7

    申请日：1992-12-04

    申请人： Philips Electronics N.V.

    发明人： Russell, Mark Alan ,  Bergmans, Johannes Wilhelmus Maria ,  Bogers, Antonius Johannes Petrus ,  Kathmann, Eric

    IPC分类号： H04L25/03

    CPC分类号： H04L25/4975 ,  H04L25/03057 ,  H04L25/03343

    摘要： For avoiding error propagation as a result of decision feedback equalization, the data to be transmitted are coded with a coder 2 which has a transfer function substantially inverse to the transfer function of the channel 4. Consequently, instantaneous decisions about the received symbol may be made at the receiver 6 without intersymbol interference causing a disturbance. If the channel transfer function differs from the transfer function of the precoder 2, intersymbol interference will again occur, so that the symbol error rate will increase. In order to restrict this increase of the symbol error rate as much as possible, the receiver comprises a cascaded circuit of an adaptive filter 18 which has an inverse transfer function to that of the channel and a decoder 21 which has a inverse transfer function to that of the precoder 2.