H - Electricity – 04 – J
Patent
H - Electricity
04
J
H04J 14/02 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 2357829
The invention concerns an optical transmission system, wherein the energizing signals are transmitted in the form of synchronous digital hierarchy (SDH) signals or forward error correction (FEC) signals. The transmission system comprises a transmission channel, typically a supervisory channel, having a lower rate than that of the energizing signal; said channel is transmitted by over-modulation of a subcarrier. The frequency of the subcarrier is selected so as to limit demodulation errors in the subcarrier due to the energizing signal harmonics.
L'invention concerne un système de transmission optique, dans lequel les signaux de charge sont transmis sous forme de signaux à hiérarchie numérique synchrone (SDH) ou à code correcteur d'erreurs (FEC: Forward Error Correction en anglais). Le système de transmission présente une voie de transmission, typiquement une voie de supervision, à un débit inférieur à celui du signal de charge; cette voie est transmise par surmodulation d'une sous porteuse. La fréquence de la sous porteuse est choisie de sorte à limiter les erreurs de démodulation de la sous porteuse du fait des harmoniques du signal de charge.
Beylat Jean-Luc
Bisson Arnaud
Bruyere Franck
Noirie Ludovic
Alcatel
Robic
LandOfFree
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