Method and apparatus for interference cancellation in hybrid satellite-terrestrial network
First Claim
1. A method for cancelling interference caused by a terrestrial transmitter at a satellite receiver in a hybrid satellite-terrestrial network, the method comprising:
- modulating payload data including multimedia content, the payload data being part of satellite information obtained from a satellite signal component of a received over-the-air (OTA) signal;
generating a reference terrestrial signal based on the modulated payload data;
generating, at the satellite receiver, an interference cancellation signal based on the reference terrestrial signal and the received OTA signal, the interference cancellation signal being a modified version of the reference terrestrial signal; and
cancelling, at the satellite receiver, the interference caused by the terrestrial transmitter by combining the interference cancellation signal with the received OTA signal.
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Accused Products
Abstract
In a method for cancelling interference caused by a terrestrial transmitter at a satellite receiver in a hybrid satellite-terrestrial network, a satellite receiver generates an interference cancellation signal based on a reference terrestrial signal from the terrestrial transmitter and a received over-the-air (OTA) signal. The satellite receiver then cancels the interference caused by the terrestrial transmitter by combining the interference cancellation signal with the received OTA signal. The interference cancellation signal is a modified version of the reference terrestrial signal.
21 Citations
19 Claims
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1. A method for cancelling interference caused by a terrestrial transmitter at a satellite receiver in a hybrid satellite-terrestrial network, the method comprising:
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modulating payload data including multimedia content, the payload data being part of satellite information obtained from a satellite signal component of a received over-the-air (OTA) signal; generating a reference terrestrial signal based on the modulated payload data; generating, at the satellite receiver, an interference cancellation signal based on the reference terrestrial signal and the received OTA signal, the interference cancellation signal being a modified version of the reference terrestrial signal; and cancelling, at the satellite receiver, the interference caused by the terrestrial transmitter by combining the interference cancellation signal with the received OTA signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for cancelling interference caused by a terrestrial transmitter at a satellite receiver in a hybrid satellite-terrestrial network, the method comprising:
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generating, at the satellite receiver, an interference cancellation signal based on a reference terrestrial signal from the terrestrial transmitter and a received over-the-air (OTA) signal, the interference cancellation signal being a modified version of the reference terrestrial signal; cancelling, at the satellite receiver, the interference caused by the terrestrial transmitter by combining the interference cancellation signal with the received OTA signal; increasing a transmission power of the reference terrestrial signal; comparing the transmission power of the reference terrestrial signal with a transmission power level; and determining whether to transmit the reference terrestrial signal based on the comparing step. - View Dependent Claims (13)
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14. A satellite receiver comprising:
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an interference cancellation block configured to generate an interference cancellation signal based on a reference terrestrial signal from a terrestrial transmitter and a received over-the-air (OTA) signal, the interference cancelation signal being a modified version of the reference terrestrial signal; a first combiner configured to combine the interference cancellation signal with the received OTA signal to cancel interference caused by the terrestrial transmitter in a hybrid satellite-terrestrial network; and a satellite signal decoder configured to obtain satellite information from a satellite signal component of the received OTA signal;
whereinthe satellite information is payload data including multimedia content, the payload data is modulated, and the reference terrestrial signal is generated based on the modulated payload data. - View Dependent Claims (15, 16, 17, 18)
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19. An interference cancellation system for a hybrid satellite-terrestrial network, the system comprising:
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a terrestrial transmitter configured to compare a transmission power of a reference terrestrial signal with a transmission power level, and to transmit the reference terrestrial signal if the transmission power is less than the transmission power level; and a satellite receiver including, an interference cancellation block configured to generate an interference cancellation signal based on the reference terrestrial signal and a received over-the-air (OTA) signal, the interference cancelation signal being a modified version of the reference terrestrial signal, and a combiner configured to combine the interference cancellation signal with the received OTA signal to cancel interference caused by the terrestrial transmitter in the hybrid satellite-terrestrial network.
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Specification