System and method for enabling ultra small aperture communication antenna using spectral replication and coherent frequency and phase combining
View Patent ↗A system for enabling use of ultra-small aperture terminals in satellite communications is provided. The system comprises a transmitter configured to receive an input signal having information, a bandwidth, and an amplitude, replicate the input signal into two or more replications of the input signal, convert each of the two or more replications to have a frequency tuned to two or more corresponding satellite transponders while maintaining the bandwidth and all the information of the input signal, and combine the two or more replications into a single uplink signal. A transmit antenna is configured to transmit the uplink signal to the two or more satellite transponders.
1. A system for enabling use of ultra-small aperture terminals in satellite communications, the system comprising:
a transmitter configured to
receive an input signal having information, a bandwidth, and an amplitude, replicate the input signal into two or more replications of the input signal, convert each of the two or more replications to have a frequency tuned to two or more corresponding satellite transponders while maintaining the bandwidth and all the information of the input signal, and
combine the two or more replications into a single uplink signal; and
a transmit antenna configured to transmit the uplink signal to a receiver via the two or more satellite transponders, the receiver having a receive antenna configured to receive a re-transmission of the uplink signal from the two or more satellite transponders and a diversity combiner configured to coherently combine the two or more replications into an output signal by phase and frequency using one or more diversity combiners arranged in a cascading arrangement, the one or more diversity combiners being configured to impart an increase in power and signal-to-noise ratio on the output signal as compared to the input signal.
2. The system of claim 1 , wherein the transmitter is further configured to convert each of the two or more replications to have the frequency tuned to the two or more corresponding satellite transponders while maintaining the amplitude of the input signal.
3. The system of claim 1 , wherein one of the two or more replications is the input signal.
4. The system of claim 1 , wherein
the transmitter is configured to convert the two or more replications to have a frequencies that, when combined, are within the frequencies and bandwidth corresponding to a single satellite transponders; and
the transmit antenna transmits the uplink signal to the single satellite transponder.
5. The system of claim 4 , wherein the two or more replications reduce Peak-to-Average Power Ratio (PAPR) for the system compared to a system that utilizes only one replication.
6. The system of claim 4 , wherein the two or more replications reduce Peak-to-Average Power Ratio (PAPR) for the system compared to a system that utilizes only one replication.
7. The system of claim 1 , wherein the two or more satellite transponders are at a same satellite.
8. The system of claim 7 , further comprising a second a transmit antenna configured to transmit the second uplink signal to the two or more satellite transponders on the second satellite.
9. The system of claim 1 , wherein the transmitter is further configured to
replicate the input signal into four or more replications of the input signal, convert at least two of the four or more replications to have a frequency tuned to two or more corresponding satellite transponders on a first satellite while maintaining the bandwidth and all the information of the input signal,
convert at least two other of the four or more replications to have a frequency tuned to two or more corresponding satellite transponders on a second satellite while maintaining the bandwidth and all the information of the input signal,
combine the at least two of the four or more replications tuned to the first satellite into a first uplink signal, and
combine the at least two other of the four or more replications tuned to the second satellite into a second uplink signal.
10. The system of claim 1 , wherein said diversity combiner is integrated with a modem.
11. The system of claim 1 , wherein one of the two or more replications is the input signal.
12. The system of claim 1 , wherein the two or more satellite transponders are at a same satellite.
13. A system for enabling use of ultra-small aperture terminals in satellite communications, the system comprising:
a receive antenna configured to receive a downlink signal from two or more satellite transponders, the downlink signal being a re-transmission of an uplink signal, the uplink signal comprising two or more replications of an input signal having information, a bandwidth, and an amplitude, and each of the two or more replications of the input signal having a frequency tuned to the two or more satellite transponders while maintaining the bandwidth and all the information of the input signal; and
a diversity combiner configured to
receive the downlink signal from the receive antenna, and
coherently combine the two or more replications into an output signal by phase and frequency one or more diversity combiners arranged in a cascading arrangement, the one or mom diversity combiners being configured to impart an increase in power and signal-to-noise ratio on the output signal as compared to the input signal.