Downstream broad beam diversity with interference cancellation
First Claim
1. A subscriber terminal for communicating with a gateway through more than one satellite relay comprising:
- an antenna configured to receive a composite signal from more than one satellite relay, wherein the composite signal includes a first signal that is transmitted from a first user through a first satellite, a second signal that is transmitted from the first user through a second satellite, and a third signal that is transmitted from a second user through the second satellite, wherein the first signal and the second signal are transmitted to the first and second satellites as the same signal;
an isolator module configured to;
isolate each of the first signal and the second signal from the composite signal; and
combine the first signal and the second signal to generate a received signal having a higher apparent signal strength than that of the first signal alone phase shift at least one of the first or the second signal so that the first signal and the second signal are in phase with respect to each other; and
add the first signal and the second signal.
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Accused Products
Abstract
Downstream satellite communication systems and methods are disclosed according to embodiments of the invention. According to embodiments of the invention, a composite signal may be received by a subscriber terminal that includes at least a first signal that is transmitted from a first user through a first satellite, a second signal that is transmitted from the first user through a second satellite, and a third signal that is transmitted from a second user through the second satellite. The first signal and the second signal are transmitted to the first and second satellites as the same signal from a gateway, transmitter or subscriber terminal. The third signal is isolated from the composite signal and the subtracted from the composite signal.
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Citations
21 Claims
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1. A subscriber terminal for communicating with a gateway through more than one satellite relay comprising:
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an antenna configured to receive a composite signal from more than one satellite relay, wherein the composite signal includes a first signal that is transmitted from a first user through a first satellite, a second signal that is transmitted from the first user through a second satellite, and a third signal that is transmitted from a second user through the second satellite, wherein the first signal and the second signal are transmitted to the first and second satellites as the same signal; an isolator module configured to; isolate each of the first signal and the second signal from the composite signal; and combine the first signal and the second signal to generate a received signal having a higher apparent signal strength than that of the first signal alone phase shift at least one of the first or the second signal so that the first signal and the second signal are in phase with respect to each other; and
add the first signal and the second signal. - View Dependent Claims (2, 3, 4, 5)
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6. A satellite communication system comprising:
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a gateway including one or more antennas; a plurality of satellites, including at least a first and a second satellite; and a subscriber terminal in communication with the gateway through the plurality of satellites, wherein the subscriber terminal includes; an antenna configured to receive a composite signal from the plurality of satellites, wherein the composite signal includes a first signal that is transmitted from the gateway through the first satellite, a second signal that is transmitted from the gateway through the second satellite, and a third signal that is transmitted from a first user through the second satellite, wherein the first signal and the second signal are the same signal when transmitted from the gateway; an isolator module configured to; isolate each of the first signal and the second signal from the composite signal; and combine the first signal and the second signal to generate a received signal having a higher apparent signal strength than that of the first signal alone phase shift at least one of the first or the second signal so that the first signal and the second signal are in phase with respect to each other; and
add the first signal and the second signal. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A satellite communication method comprising:
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receiving a composite signal at a subscriber terminal from a plurality of satellites;
wherein the composite signal includes a first signal that is transmitted from a first user through a first satellite, a second signal that is transmitted from the first user through a second satellite, and a third signal that is transmitted from a second user through the second satellite, wherein the first signal and the second signal are transmitted to the first and second satellites as the same signal;isolating each of the first signal and the second signal from the composite signal; and combining the first signal and the second signal to generate a received signal having a higher apparent signal strength than that of the first signal alone phase shifting at least one of the first or the second signal so that the first signal and the second signal are in phase with respect to each other; and
add the first signal and the second signal. - View Dependent Claims (18, 19)
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20. A satellite communication method comprising:
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receiving a composite signal at a subscriber terminal from at least two satellites;
wherein the composite signal includes a first primary signal that is transmitted from a first user through a first satellite, a first secondary signal that is transmitted from a second user through the first satellite, a second primary signal that is transmitted from a third user through a second satellite, and a second secondary signal that is transmitted from the second user through the second satellite, wherein the first secondary signal and the second secondary signal are transmitted to the first and second satellites as the same signal;isolating the first secondary signal from the composite signal; isolating the second secondary signal from the composite signal; and combining the first secondary signal and the second secondary signal to generate a received signal having a higher apparent signal strength than that of either the first secondary signal or the second secondary signal phase shifting at least one of the first or the second signal so that the first signal and the second signal are in phase with respect to each other; and
add the first signal and the second signal. - View Dependent Claims (21)
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Specification