Dynamic transmission impairment correction for satellite systems
A system includes a processor and a memory. The memory stores instructions executable by the processor to identify an equalization response for equalizing an output signal of a modulator of a satellite gateway, generate a compensation response based on the equalization response and a sample rate of a pre-distorter of the modulator, and send the equalization response to the pre-distorter.
1. A system, comprising:
a processor; and
a memory coupled to the processor, the memory storing instructions executable by the processor to:
identify a first equalization response for a transmit path for data transmissions of a satellite gateway, wherein the first equalization response compensates for one or both of:
signal impairment associated with a modulator in the transmit path; and
signal impairment associated with radio frequency (RF) transmission circuitry in the transmit path;
generate a compensation response based on:
the first equalization response;
a second equalization response, wherein the second equalization response compensates for signal impairment associated with a transponder in the transmit path; and
a sample rate of a pre-distorter of the modulator; and
send the compensation response to the pre-distorter.
2. The system of claim 1 , wherein the first equalization response compensates for signal impairment associated with one or more of:
digital-to-analog conversion at the modulator;
analog filtering at the modulator;
frequency upconversion at the modulator; and
amplification at the modulator.
3. The system of claim 1 , wherein the first equalization response compensates for signal impairment associated with one or both of:
frequency upconversion at the RF transmission circuitry; and
amplification at the RF transmission circuitry.
4. The system of claim 1 , wherein the first equalization response compensates for signal impairments including one or more of:
amplitude response variation with frequency;
non-linearity of phase response variation with frequency; and
gain variation with frequency.
5. The system of claim 1 , wherein the satellite gateway includes a plurality of modulators, wherein the memory stores instructions executable by the processor to generate a respective compensation response for each one of the plurality of modulators.
6. The system of claim 1 , wherein the transponder is a satellite transponder.
7. The system of claim 1 , wherein the second equalization response compensates for signal impairment associated with one or more of:
analog filtering at the satellite transponder;
frequency translation at the satellite transponder; and
amplification at the satellite transponder.
8. The system of claim 1 , wherein the second equalization response compensates for signal impairment associated with one or more of:
amplitude response variation with frequency;
non-linearity of phase response variation with frequency; and
gain variation with frequency.
9. The system of claim 1 , wherein the memory stores instructions executable by the processor to generate the compensation response based on:
the first equalization response;
the second equalization response;
the sample rate of the pre-distorter; and
a third equalization response, wherein the third equalization response compensates for signal impairment associated with one or more of:
an RF antenna in the transmit path;
an uplink from the satellite gateway to a satellite in the transmit path; and
a downlink from the satellite to a terminal in the transmit path.
10. The system of claim 9 , wherein the third equalization response compensates for signal impairment associated with one or both of:
power fluctuation in the uplink; and
power fluctuation in the downlink.
11. A method, comprising:
identifying, by a processor, a first equalization response, for a transmit path for data transmissions of a satellite gateway, wherein the first equalization response compensates for one or both of:
signal impairment associated with a modulator in the transmit path; and
signal impairment associated with radio frequency (RF) transmission circuitry in the transmit path;
generating a compensation response based on:
the first equalization response;
a second equalization response, wherein the second equalization response compensates for signal impairment associated with a transponder in the transmit path; and
a sample rate of a pre-distorter of the modulator; and
sending the compensation response to the pre-distorter.
12. The method of claim 11 , wherein the first equalization response compensates for signal impairment associated with one or more of:
digital-to-analog conversion at the modulator;
analog filtering at the modulator;
frequency upconversion at the modulator; and
amplification at the modulator.
13. The method of claim 11 , wherein the first equalization response compensates for signal impairment associated with one or both of:
frequency upconversion at the RF transmission circuitry; and
amplification at the RF transmission circuitry.
14. The method of claim 11 , wherein the first equalization response compensates for signal impairments including one or more of:
amplitude response variation with frequency;
non-linearity of phase response variation with frequency; and
gain variation with frequency.
15. The method of claim 11 , comprising generating a respective compensation response for each one of a plurality of modulators of the satellite gateway.
16. The method of claim 11 , wherein the transponder is a satellite transponder.
17. The method of claim 11 , wherein the second equalization response compensates for signal impairment associated with one or more of:
analog filtering at the satellite transponder;
frequency translation at the satellite transponder; and
amplification at the satellite transponder.
18. The method of claim 11 , wherein the second equalization response compensates for signal impairment associated with one or more of:
amplitude response variation with frequency;
non-linearity of phase response variation with frequency; and
gain variation with frequency.
19. The method of claim 18 , comprising generating the compensation response based on:
the first equalization response;
the second equalization response;
the sample rate of the pre-distorter; and
a third equalization response, wherein the third equalization response compensates for signal impairment associated with one or more of:
an RF antenna in the transmit path;
an uplink from the satellite gateway to a satellite in the transmit path; and
a downlink from the satellite to a terminal in the transmit path.
20. The method of claim 11 , wherein the third equalization response compensates for signal impairment associated with one or both of:
power fluctuation in the uplink; and
power fluctuation in the downlink.
21. A system, comprising:
a processor; and
a memory coupled to the processor, the memory storing instructions executable by the processor to:
identify a first equalization response for a transmit path for data transmissions of a satellite gateway, wherein the first equalization response compensates for one or both of:
signal impairment associated with a modulator in the transmit path; and
signal impairment associated with radio frequency (RF) transmission circuitry in the transmit path;
generate a compensation response based on:
the first equalization response;
a second equalization response, wherein the second equalization response compensates for signal impairment associated with one or more of:
an RF antenna in the transmit path;
an uplink from the satellite gateway to a satellite in the transmit path; and
a downlink from the satellite to a terminal in the transmit path; and
a sample rate of a pre-distorter of the modulator; and
send the compensation response to the pre-distorter.
22. The system of claim 21 , wherein the first equalization response compensates for signal impairment associated with one or more of:
digital-to-analog conversion at the modulator;
analog filtering at the modulator;
frequency upconversion at the modulator; and
amplification at the modulator.
23. The system of claim 21 , wherein the first equalization response compensates for signal impairment associated with one or both of:
frequency upconversion at the RF transmission circuitry; and
amplification at the RF transmission circuitry.
24. The system of claim 21 , wherein the second equalization response compensates for signal impairment associated with one or both of:
power fluctuation in the uplink; and
power fluctuation in the downlink.
25. The system of claim 21 , wherein the memory stores instructions executable by the processor to generate the compensation response based on:
the first equalization response;
the second equalization response;
the sample rate of the pre-distorter; and
a third equalization response, wherein the third equalization response compensates for signal impairment associated with a satellite transponder in the transmit path.