Time division multiple access optical subcarriers
A transmitter can include a laser operable to output an optical signal; a digital signal processor operable to receive data and provide a plurality of electrical signals based on the data; and a modulator operable to modulate the optical signal to provide a plurality of optical subcarriers based on the plurality of electrical signals. One of the plurality of subcarriers carries first information indicative of a first portion of the data in a first time slot and second information indicative of a second portion of the data in a second time slot. The first information is associated with a first node remote from the transmitter and the second information is associated with a second node remote from the transmitter. A receiver as well as a system also are described.
1. A transmitter, comprising:
a laser operable to output an optical signal;
a digital signal processor operable to receive data and provide a plurality of electrical signals based on the data;
a modulator operable to modulate the optical signal to provide a plurality of optical subcarriers based on the plurality of electrical signals, one of the plurality of subcarriers carries first information indicative of a first portion of the data in a first time slot and second information indicative of a second portion of the data in a second time slot, the first information being associated with a first node remote from the transmitter and the second information being associated with a second node remote from the transmitter, wherein the digital signal processor includes:
a first burst slot circuit, the first burst slot circuit providing first time slot data indicative of the first information during the first time slot; and
a second burst slot circuit, the second burst slot circuit providing second time slot data indicative of the second information during the second time slot.
2. A transmitter in accordance with claim 1 , wherein the first and second information is time division multiple access (TDMA) encoded.
3. A transmitter in accordance with claim 1 , wherein each of the plurality of optical subcarriers is a Nyquist subcarrier.
4. A transmitter in accordance with claim 1 , wherein each of the plurality of optical subcarriers does not spectrally overlap with another of the plurality of optical subcarriers.
5. A transmitter in accordance with claim 1 , wherein the digital signal processor includes a burst slot circuit, the burst slot circuit providing time slot data indicative of the first information during the first time slot.
6. A transmitter in accordance with claim 1 , wherein the digital signal processor includes:
a first forward error correction encoder that receives the first portion of the data and provides first encoded data;
a first bit-to-symbol mapper circuit that provides first symbol information based on the first encoded data, the first burst slot circuit providing first time slot data based on the first symbol information;
a second forward error correction encoder that receives the second portion of the data and provides second encoded data; and
a second bit-to-symbol mapper circuit that provides second symbol information based on the second encoded data, the second burst slot circuit providing second time slot data based on the second symbol information.
7. A transmitter in accordance with claim 6 , further including an adder circuit that adds the first time slot data and the second time slot data.
8. A transmitter comprising:
a laser operable to output an optical signal;
a digital signal processor operable to receive data and provide a plurality of electrical signals based on the data;
a modulator operable to modulate the optical signal to provide a plurality of optical subcarriers based on the plurality of electrical signals, one of the plurality of subcarriers carries first information indicative of a first portion of the data in a first time slot and second information indicative of a second portion of the data in a second time slot, the first information being associated with a first node remote from the transmitter and the second information being associated with a second node remote from the transmitter,
wherein the digital signal processor includes a burst slot circuit, the burst slot circuit providing time slot data indicative of the first information during the first time slot,
wherein the digital signal processor includes:
a forward error correction encoder that receives the first portion of the data and provides encoded data;
a bit-to-symbol mapper circuit that provides symbol information based on the encoded data, the burst slot circuit providing time slot data based on the symbol information.
9. A transmitter in accordance with claim 8 , further including:
a scheduler circuit that supplies an output to the burst slot circuit, such that a timing of an output of the time slot data is controlled based on the output of the scheduler circuit.
10. A transmitter in accordance with claim 8 , wherein the first and second information is time division multiple access (TDMA) encoded.
11. A transmitter comprising:
a laser operable to output an optical signal;
a digital signal processor operable to receive data and provide a plurality of electrical signals based on the data;
a modulator operable to modulate the optical signal to provide a plurality of optical subcarriers based on the plurality of electrical signals, one of the plurality of subcarriers carries first information indicative of a first portion of the data in a first time slot and second information indicative of a second portion of the data in a second time slot, the first information being associated with a first node remote from the transmitter and the second information being associated with a second node remote from the transmitter,
wherein the digital signal processor includes a burst slot circuit, the burst slot circuit providing time slot data indicative of the first information during the first time slot, the transmitter further including a scheduler circuit that supplies an output to the burst slot circuit, such that a timing of an output of the time slot data is controlled based on the output of the scheduler circuit.
12. A system, comprising:
a transmitter, including:
a laser operable to output an optical signal,
a digital signal processor operable to receive data and provide a plurality of electrical signals based on the data, and
a modulator operable to modulate the optical signal to provide a plurality of optical subcarriers based on the plurality of electrical signals, one of the plurality of subcarriers carries first information during a first time slot and second information during a second time slot;
a first receiver provided in a first node, the first receiver receiving being optically coupled to the transmitter; and
a second receiver provided in a second node, the second receiver being optical coupled to the transmitter, the first and second receivers being remote from the transmitter, such that the first information is associated with the first node and the second information is associated with a second node remote from the transmitter,
wherein the digital signal processor includes:
a first burst slot circuit, the first burst slot circuit providing first time slot data indicative of the first information during the first time slot; and
a second burst slot circuit, the second burst slot circuit providing second time slot data indicative of the second information during the second time slot.
13. A system in accordance with claim 12 , wherein the first and second information is time division multiple access (TDMA) encoded.
14. A system in accordance with claim 12 , wherein each of the plurality of optical subcarriers is a Nyquist subcarrier.
15. A system in accordance with claim 12 , wherein each of the plurality of optical subcarriers does not spectrally overlap with another of the plurality of optical subcarriers.
16. A system in accordance with claim 12 , wherein the digital signal processor includes a burst slot circuit, the burst slot circuit providing time slot data indicative of the first information during the first time slot.
17. A transmitter in accordance with claim 16 , wherein the first and second information is time division multiple access (TDMA) encoded.
18. A system in accordance with claim 12 , wherein the digital signal processor includes:
a first forward error correction encoder that receives a first portion of the data and provides first encoded data;
a second forward error correction encoder that receives a second portion of the data and provides second encoded data;
a first bit-to-symbol mapper circuit that provides first symbol information based on the first encoded data, the first burst slot circuit providing first time slot data based on the first symbol information; and
a second bit-to-symbol mapper circuit that provides second symbol information based on the second encoded data, the second burst slot circuit providing second time slot data based on the second symbol information.
19. A system in accordance with claim 18 , further including an adder circuit that adds the first time slot data and the second time slot data.
20. A system comprising:
a transmitter, including:
a laser operable to output an optical signal,
a digital signal processor operable to receive data and provide a plurality of electrical signals based on the data, and
a modulator operable to modulate the optical signal to provide a plurality of optical subcarriers based on the plurality of electrical signals, one of the plurality of subcarriers carries first information during a first time slot and second information during a second time slot;
a first receiver provided in a first node, the first receiver receiving being optically coupled to the transmitter; and
a second receiver provided in a second node, the second receiver being optical coupled to the transmitter, the first and second receivers being remote from the transmitter, such that the first information is associated with the first node and the second information is associated with a second node remote from the transmitter,
wherein the digital signal processor includes a burst slot circuit, the burst slot circuit providing time slot data indicative of the first information during the first time slot,
wherein the digital signal processor includes:
a forward error correction encoder that receives the first portion of the data and provides encoded data;
a bit-to-symbol mapper circuit that provides symbol information based on the encoded data, the burst slot circuit providing time slot data based on the symbol information.
21. A system in accordance with claim 20 , further including a scheduler circuit that supplies an output to the burst slot circuit, such that a timing of an output of the time slot data is controlled based on the outupt of the scheduler circuit.
22. A transmitter in accordance with claim 20 , wherein the first and second information is time division multiple access (TDMA) encoded.
23. A system comprising:
a transmitter, including:
a laser operable to output an optical signal,
a digital signal processor operable to receive data and provide a plurality of electrical signals based on the data, and
a modulator operable to modulate the optical signal to provide a plurality of optical subcarriers based on the plurality of electrical signals, one of the plurality of subcarriers carries first information during a first time slot and second information during a second time slot;
a first receiver provided in a first node, the first receiver receiving being optically coupled to the transmitter; and
a second receiver provided in a second node, the second receiver being optical coupled to the transmitter, the first and second receivers being remote from the transmitter, such that the first information is associated with the first node and the second information is associated with a second node remote from the transmitter,
wherein the digital signal processor includes a burst slot circuit, the burst slot circuit providing time slot data indicative of the first information during the first time slot, the system further including a scheduler circuit that supplies an output to the burst slot circuit, such that a timing of an output of the time slot data is controlled based on the output of the scheduler circuit.
24. A transmitter in accordance with claim 23 , wherein the first and second information is time division multiple access (TDMA) encoded.