EP 1279243 A1 20030129 - METHOD AND CIRCUIT ARRANGEMENT FOR THE DETERMINATION OF THE CARRIER-TO-NOISE RATIO FOR OPTICAL TRANSMISSIONS
Title (en)
METHOD AND CIRCUIT ARRANGEMENT FOR THE DETERMINATION OF THE CARRIER-TO-NOISE RATIO FOR OPTICAL TRANSMISSIONS
Title (de)
VERFAHREN UND SCHALTUNGSANORDNUNG ZUR BESTIMMUNG DES TRÄGER-ZU-RAUSCH-VERHÄLTNISSES BEI OPTISCHER ÜBERTRAGUNG
Title (fr)
PROCEDE ET CIRCUIT PERMETTANT DE DETERMINER LE RAPPORT PORTEUSE-BRUIT DANS UNE TRANSMISSION OPTIQUE
Publication
Application
Priority
- DE 0101687 W 20010503
- DE 10021860 A 20000505
Abstract (en)
[origin: WO0186839A1] 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.
IPC 1-7
IPC 8 full level
H04B 10/077 (2013.01); H04B 10/079 (2013.01)
CPC (source: EP US)
H04B 10/077 (2013.01 - EP US); H04B 10/07955 (2013.01 - EP US)
Citation (search report)
See references of WO 0186839A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 0186839 A1 20011115; DE 10021860 A1 20011115; DE 10021860 C2 20020314; EP 1279243 A1 20030129; US 2004101300 A1 20040527
DOCDB simple family (application)
DE 0101687 W 20010503; DE 10021860 A 20000505; EP 01943015 A 20010503; US 27545403 A 20030701