公开(公告)号：US4184129A

公开(公告)日：1980-01-15

申请号：US803245

申请日：1977-06-03

申请人： Odile Macchi nee Danjon ,  Michel Levy ,  Cesar Macchi

发明人： Odile Macchi nee Danjon ,  Michel Levy ,  Cesar Macchi

IPC分类号： H04L25/03 ,  H04B1/10 ,  H04B3/04

CPC分类号： H04L25/03038

摘要： A system for transmitting data between distant locations comprises a modem at each location and a communication channel, typically a telephone line, whose transfer function has a principal component whose variation is slow and a second component whose variation is faster, but whose action is lesser. A correction device is located in the modem at the output of the channel and comprises an equalization filter constructed to compensate for the principal component and a digital adaptive network having a few coefficients and a low time constant, compatible with the frequency of the second component. The coefficients of the digital network may be adapted independently of those of the equalization filter.

摘要翻译： 用于在远处位置之间传输数据的系统包括每个位置处的调制解调器和通信信道，通常是电话线路，其传递函数具有变化较慢的主要分量，其变化更快，但其作用较小的第二分量。 校正装置位于调制解调器的信道的输出处，并且包括均衡滤波器，其被构造为补偿主分量，以及具有与第二分量的频率兼容的少数系数和低时间常数的数字自适应网络。 数字网络的系数可以独立于均衡滤波器的系数来适应。