发明名称 |
Empfangsseitige Schaltung für ein System zur optischen Übertragung eines Digitalsignals über einen dispersionsbehafteten Lichtwellenleiter |
摘要 |
In the optical transmission of a digital signal via an optical waveguide (3) which is dispersive at the operating wavelength, by means of an optical transmitter (2), the output signal of which is frequency modulated (FSK-modulated in this case) by the digital signal, there is at the end of the optical waveguide link a difference DELTA tau in the delay of the two wave trains which occur in the FSK modulation. The electrical output signal V of an opto-electrical transducer (5) at the receiving end is intensity-modulated and passes through three value ranges. To retrieve the digital signal from this, a circuit (6) according to the invention is used, the output of which assumes a first state when a sample is in the first value range, the output of which assumes a second stage when a sample is in the second value range and the output of which assumes the state which occurred N bits previously at the same output when a sample is in the third value range. <IMAGE> |
申请公布号 |
DE4236488(A1) |
申请公布日期 |
1994.05.05 |
申请号 |
DE19924236488 |
申请日期 |
1992.10.29 |
申请人 |
ALCATEL SEL AG, 70435 STUTTGART, DE |
发明人 |
WEDDING, BERTHOLD, DIPL.-PHYS. DR.RER.NAT., 7015 KORNTAL, DE |
分类号 |
H04B10/18;(IPC1-7):H04L27/14;H04B10/06;H04B10/12 |
主分类号 |
H04B10/18 |
代理机构 |
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主权项 |
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地址 |
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