Upstream broad beam diversity with interference cancellation
First Claim
1. A satellite communication gateway comprising:
- a first antenna configured to receive a signal from a first satellite, wherein the signal received from the first satellite includes at least a first signal from a first user;
a second antenna configured to receive a second signal from a second satellite, wherein the second signal includes at least a second primary signal from a second user and a second secondary signal;
a demodulator-remodulator configured to isolate the second secondary signal from the second signal; and
a combiner configured to synchronize the first signal and the second signal and combine the first signal and the second secondary signal to generate a received signal having a higher apparent signal strength than that of the first signal alone,wherein the combiner is a maximal ratio combiner, andwherein the second secondary signal includes a version of the first signal.
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Abstract
A satellite communication system is provided according to one embodiment of the invention. The satellite communication system includes a gateway with first and second antennas. The first antenna receives a signal from a first satellite that includes at least a first signal from a first user. The second antenna receives a second signal from a second satellite, that includes at least a second primary signal from a second user and a version of the first signal. The gateway may include circuitry to isolate the first signal from the second signal. The gateway may also include a combiner configured to combine the first signal from the first satellite and the first signal isolated from the second signal. Various other embodiments are disclosed that isolate a secondary signal received from a satellite and combine the secondary signal with the same signal received from other antennas at the gateway.
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Citations
14 Claims
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1. A satellite communication gateway comprising:
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a first antenna configured to receive a signal from a first satellite, wherein the signal received from the first satellite includes at least a first signal from a first user; a second antenna configured to receive a second signal from a second satellite, wherein the second signal includes at least a second primary signal from a second user and a second secondary signal; a demodulator-remodulator configured to isolate the second secondary signal from the second signal; and a combiner configured to synchronize the first signal and the second signal and combine the first signal and the second secondary signal to generate a received signal having a higher apparent signal strength than that of the first signal alone, wherein the combiner is a maximal ratio combiner, and wherein the second secondary signal includes a version of the first signal. - View Dependent Claims (2, 3, 4, 5)
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6. A satellite communication method comprising:
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receiving a signal from a first satellite, wherein the signal from the first satellite includes at least a first signal from a first user; receiving a signal from a second satellite, wherein the signal from the second satellite includes at least a second primary signal from a second user and a second secondary signal; canceling the second primary signal from the second signal to generate a modified second signal; and synchronizing the first signal and second signal and combining the modified second signal and the first signal to generate a received signal having a higher apparent signal strength than that of the first signal alone, wherein the combining includes maximal ratio combining, and wherein the second secondary signal includes a version of the first signal. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A satellite communication method comprising:
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receiving a first signal from a first satellite, wherein the first signal includes at least a first primary signal from a first user and a second signal from a second user; receiving a third signal from a second satellite, wherein the third signal includes at least a third primary signal from a third user and a version of the second signal; isolating the second signal from the first signal; isolating the version of the second signal from the third signal; and synchronizing the first signal and second signal and the second signal isolated from the first signal and the second signal isolated from the third signal to generate a received signal having a higher apparent signal strength than that of the second signal alone, wherein the combining includes maximal ratio combining. - View Dependent Claims (14)
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Specification