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US 6,486,985 B1Granted
Method for transmitting an additional data signal and a useful data signal in an optical network
AssigneeSiemens Aktiengesellschaft
InventorsMathias Bischoff, Jürgen Burgmeier
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Abstract
A method for transmitting an additional data signal and a useful data signal, via optical connections, in an optical network, wherein the additional data signal is transmitted on the same channel as the useful data channel and converted into code sequences which are, in turn, superimposed on the useful data signal with a small amplitude. At the reception end, the additional data signal is recovered by cross-correlation.
Claims13
A method for transmitting an additional data signal and a useful data signal in an optical network, the method comprising the steps of:
- converting, at a transmission end, the additional data signal into a coded additional data signal having a smaller amplitude than that of the useful data signal and having defined code sequences, each of the defined code sequences including a plurality of chips and having a lower chip frequency than a bit frequency of the useful data signal;
- superimposing the coded additional data signal on the useful data signal to form a summed signal;
- transmitting the summed signal;
- separating the coded additional data signal from the useful data signal at a reception end;
- comparing the coded additional data signal with the defined code sequences;
- reconverting the coded additional data signal into the additional data signal;
- and
- outputting the additional data signal as an additional signal.
5 more elements
Dependencies are inferred from the claim text.