Methods and systems for increasing bandwidth efficiency in satellite communications
First Claim
1. A method for providing bandwidth efficiency in a satellite communication system, comprising:
- receiving, at a gateway ground station, a combined signal from a satellite, the combined signal including a plurality of source signals with overlapping bandwidths;
receiving, at the gateway ground station, a combined information signal from the satellite;
extracting, from the combined information signal, information specifying at least one predetermined modulation method;
generating, based on the at least one predetermined modulation method, a plurality of estimated waveforms corresponding to the plurality of source signals; and
separating, by signal cancellation, the plurality of source signals from the combined signal based on the plurality of estimated waveforms.
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Accused Products
Abstract
Methods and systems are provided for increasing bandwidth efficiency in satellite communications. In some embodiments, a satellite communications method is provided that comprises receiving, at a satellite and from a plurality of user ground terminals, a plurality of source signals, wherein each of the source signals are modulated according to at least one source modulation method, and further receiving, at a satellite and from a plurality of user ground terminals, a plurality of information signals corresponding to the plurality of source signals. The method further includes combining, at the satellite, the plurality of source signals into a combined source signal with an overlapping bandwidth, wherein each of the source signals are further modulated according to at least one predetermined modulation method before they are combined, and transmitting, by a downlink transmission from the satellite to a gateway ground station, the combined source signal.
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Citations
20 Claims
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1. A method for providing bandwidth efficiency in a satellite communication system, comprising:
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receiving, at a gateway ground station, a combined signal from a satellite, the combined signal including a plurality of source signals with overlapping bandwidths; receiving, at the gateway ground station, a combined information signal from the satellite; extracting, from the combined information signal, information specifying at least one predetermined modulation method; generating, based on the at least one predetermined modulation method, a plurality of estimated waveforms corresponding to the plurality of source signals; and separating, by signal cancellation, the plurality of source signals from the combined signal based on the plurality of estimated waveforms. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for providing bandwidth efficiency in satellite communications, the system comprising:
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one or more digital signal processors at a gateway ground station, the one or more digital signal processors being configured to; receive, from a satellite, a combined signal including a plurality of source signals with overlapping bandwidths; receive, from the satellite, a combined information signal; extract, from the combined information signal, information specifying at least one predetermined modulation method; generate, based on the at least one predetermined modulation method, a plurality of estimated waveforms corresponding to the plurality of source signals; and separate, by signal cancellation, the plurality of source signals from the combined source signal based on the plurality of estimated waveforms. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A non-transitory computer-readable medium storing instructions executable by one or more hardware processors to carry out operations comprising:
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receiving, at gateway ground station, a combined signal from a satellite, the combined signal including on a plurality of source signals with overlapping bandwidths; receiving, at gateway ground station, a combined information signal from the satellite; extracting, from the combined information signal, information specifying at least one predetermined modulation method; generating, based on the at least one predetermined modulation method, a plurality of estimated waveforms corresponding to the plurality of source signals; and separating, by signal cancellation, the plurality of source signals based on the combined source signal and the plurality of estimated waveforms. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification