发明名称 |
Systems for transmitting data between distant locations |
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.
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申请公布号 |
US4184129(A) |
申请公布日期 |
1980.01.15 |
申请号 |
US19770803245 |
申请日期 |
1977.06.03 |
申请人 |
AGENCE NAT VALORISATION RECHERCHE |
发明人 |
LEVY, MICHEL;MACCHI, CESAR;MACCHI, NEE DANJON ODILE |
分类号 |
H04L25/03;(IPC1-7):H04B1/10;H04B3/04 |
主分类号 |
H04L25/03 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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