发明名称 |
Verfahren und Schaltungsanordnung zur Bestimmung des Träger-zu-Rausch-Verhältnisses bei optischer Übertragung |
摘要 |
The invention relates to the determination of the carrier-to-noise ratio for optical transmissions when a noise-affected optical signal containing a message signal is transmitted along an optical signal transmission path, whereby the optical signal together with the optical noise transmitted therewith is fed to an optical filter (OF). The optical output signal from the above is converted into a corresponding electrical signal in a detector device (Det) and either the mid-frequency of the optical filter (OF), or the detector device (Det) is periodically modulated with a modulation signal (Um). The received total light power (Pges) is determined from a direct current component of the electrical signal and the signal power (Pse) of said message signal is determined from a time-dependent modulation component. The carrier-to-noise ratio is determined from the above parameters. |
申请公布号 |
DE10021860(C2) |
申请公布日期 |
2002.03.14 |
申请号 |
DE2000121860 |
申请日期 |
2000.05.05 |
申请人 |
SIEMENS AG |
发明人 |
BIALAS, JOACHIM;SCHEX, ANTON |
分类号 |
H04B10/08;(IPC1-7):H04B10/08 |
主分类号 |
H04B10/08 |
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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