Method and apparatus for raman cross-talk mitigation
View Patent ↗Disclosed are an apparatus and method configured to process video data signals operating on a passive optical network (PON). One example method of operation may include receiving a data signal at an optical distribution network node (ODN) and identifying signal interference in the data signal. The method may also include modifying a shape of the data signal in the electrical domain and transmitting the modified data signal to at least one optical termination unit (ONT).
1. A method, comprising:
receiving, via a receiver, a data signal at an optical line termination (OLT);
identifying, by a processor, signal interference in the data signal;
modifying, by a processor, a shape of the data signal in the electrical domain;
digitally filtering the data signal to create a modified data signal comprising a desired pulse shaped signal by removing a cross-talk interference component of the data signal; and
transmitting, via a transmitter, the modified data signal to at least one optical termination unit (ONT).
2. The method of claim 1 , further comprising:
removing Raman cross-talk interference from the received data signal.
3. The method of claim 1 , wherein the modified data signal is provided to a 1577 nanometer (nm) laser transmitter.
4. The method of claim 1 , further comprising:
converting the pulse shaped signal to an analog waveform via a digital to analog (D/A) converter.
5. The method of claim 1 , further comprising:
filtering the data signal by an analog filter set between the input data stream and an optical modulator of the ODN to remove a low frequency Raman cross-talk interference component; and
obtaining a limited high pass function with a reduced baseband non-return to zero spectrum of the data signal.
6. The method of claim 5 , and the removed low frequency Raman cross-talk interference component is in a 1550 nm video channel.
7. The method of claim 1 , wherein the data signal is a video signal.
8. The method of claim 1 , wherein the removed low frequency Raman cross-talk interference component is in a 1550 nm video channel associated with the data signal.
9. An apparatus comprising:
a receiver configured to receive a data signal;
a processor configured to
identify signal interference in the data signal and modify a shape of the data signal in the electrical domain, and
digitally filter the data signal to create a modified data signal comprising a desired pulse shaped signal by removing a cross-talk interference component of the data signal; and
a transmitter configured to transmit the modified data signal to at least one optical termination unit (ONT).
10. The apparatus of claim 9 , wherein the processor is further configured to remove Raman cross-talk interference from the received data signal.
11. The apparatus of claim 9 , wherein the modified data signal is provided to a 1577 nanometer (nm) laser transmitter.
12. The apparatus of claim 9 ,
wherein the processor is further configured to convert the pulse shaped signal to an analog waveform via a digital to analog (D/A) converter.
13. The apparatus of claim 9 , wherein the processor is further configured to filter the data signal by an analog filter set between the input data stream and an optical modulator of the ODN to remove a low frequency Raman cross-talk interference component, and obtain a limited high pass function with a reduced baseband non-return to zero spectrum of the data signal.
14. The apparatus of claim 13 , wherein the removed low frequency Raman cross-talk interference component is in a 1550 nm video channel.
15. The apparatus of claim 9 , wherein the data signal is a video signal.
16. A non-transitory computer readable storage medium configured to store instructions that when executed causes a processor to perform:
receiving, via a receiver, a data signal at an optical distribution network node (ODN);
identifying, by the processor, signal interference in the data signal;
digitally filtering the data signal to create a modified data signal comprising a desired pulse shaped signal by removing a cross-talk interference component of the data signal;
modifying, by the processor, a shape of the data signal in the electrical domain; and
transmitting, via a transmitter, the modified data signal to at least one optical termination unit (ONT).
17. The non-transitory computer readable storage medium of claim 16 , wherein the processor is further configured to perform:
removing Raman cross-talk interference from the received data signal.
18. The non-transitory computer readable storage medium of claim 16 , wherein the data signal is modified and provided a 1577 nanometer (nm) laser transmitter.
19. The non-transitory computer readable storage medium of claim 16 , wherein the processor is further configured to perform:
converting the pulse shaped signal to an analog waveform via a digital to analog (D/A) converter.
20. The non-transitory computer readable storage medium of claim 16 , wherein the processor is further configured to perform:
filtering the data signal by an analog filter set between the input data stream and an optical modulator of the ODN to remove a low frequency Raman cross-talk interference component; and
obtaining a limited high pass function with a reduced baseband non-return to zero spectrum of the data signal.