Method and apparatus for generating a tone signal
AssigneeADVA Optical Networking SE
InventorMichael Eiselt
Life of this patent
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Abstract
A method for generating a tone signal (TS) having a tone frequency, f, wherein the method comprises the following steps: supplying (S1) a binary bit stream (BBS) having a mark pattern with a supply bit rate, BR, to a signal filter unit; and filtering (S2) the supplied binary bit stream (BBS) by said signal filter unit to generate the tone signal (TS), wherein the mark pattern of the binary bit stream (BBS) supplied to said signal filter unit is adapted to minimize a ratio of the supply bit rate, BR, to the tone frequency, f, of the generated tone signal (TS).
Claims18
A method for generating a tone signal having a tone frequency,
- wherein the method comprises the following steps:
- supplying a binary bit stream having a mark pattern with a supply bit rate, to a signal filter unit;
- and
- filtering the supplied binary bit stream by said signal filter unit to generate the tone signal, wherein the mark pattern of the binary bit stream supplied to said signal filter unit is adapted to minimize a ratio of the supply bit rate to the tone frequency of the generated tone signal and wherein the ratio of the supply bit rate to the tone frequency of the tone signal is in a range between 3.0 and 5.5.
A tone signal generation apparatus for generating a tone signal having a tone frequency, wherein the tone signal generation apparatus comprises:
- a supply unit adapted to supply a binary bit stream having a mark pattern with a supply bit rate to a signal filter unit of said tone signal generation apparatus, wherein the signal filter unit is configured to filter the binary bit stream to generate the tone signal, wherein the mark pattern of the binary bit stream supplied to said signal filter unit is adapted to minimize a ratio of the supply bit rate to the tone frequency of said tone signal and wherein the ratio of the supply bit rate to the tone frequency of the tone signal is in a range between 3.0 and 5.5.
A wavelength division multiplexed network comprising a tone signal generation apparatus for generating a tone signal having a tone frequency, wherein the tone signal generation apparatus of said WDM network comprises
- a supply unit adapted to supply a binary bit stream having a mark pattern with a supply bit rate, to a signal filter unit which is configured to filter the binary bit stream to generate the tone signal, wherein the mark pattern of the binary bit stream supplied to the signal filter unit is adapted to minimize a ratio of the supply bit rate to the tone frequency of said tone signal, wherein the ratio of the supply bit rate to the tone frequency of the tone signal is in a range between 3.0 and 5.5, and
- wherein the WDM network further comprises a modulation unit receiving the generated tone signal as a pilot tone signal to modulate an optical signal.
Dependencies are inferred from the claim text.