发明名称 |
SIGNAL TRANSMISSION SYSTEM |
摘要 |
A signal transmission system uses an optical signal for carrying traffic information by modulating the brightness of the optical signal at a high frequency. A lower frequency optical overhead signal also modulates the optical signal, and a detector having a fall time characteristic of substantially longer duration than its rise time characteristic and which is of substantially longer duration than the longest bit period of the traffic is used to recover the overhead signal. The optical overhead signal modulates the maximum brightness of the signal, but not its minimum brightness so that the signal can be recarried even if the system is AC coupled. <IMAGE> |
申请公布号 |
HK1027689(A1) |
申请公布日期 |
2002.04.12 |
申请号 |
HK20000106677 |
申请日期 |
2000.10.20 |
申请人 |
MARCONI COMMUNICATIONS LIMITED |
发明人 |
DRISCOLL, JOHN PATRICK |
分类号 |
H04B10/04;H04B10/00;H04B10/02;H04B10/06;H04B10/077;H04B10/08;H04B10/14;H04B10/152;H04B10/26;H04B10/28;H04J7/00;H04J9/00;H04J14/02;H04L27/02;(IPC1-7):H04B |
主分类号 |
H04B10/04 |
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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