Method and apparatus for enabling transmission of a wireless return channel signal in a satellite communications system
First Claim
1. A method for enabling wireless reception of return channel signals in a satellite communications system having at least one satellite and a plurality of subscribers, the method comprising the steps of:
- transmitting, to the plurality of subscribers, a system time reference for establishing a precision frequency reference that is based on the system time reference; and
wirelessly receiving return channel signals from the plurality of subscribers using a carrier frequency synthesized from the precision frequency reference established from the system time reference.
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Accused Products
Abstract
There is provided a method for enabling wireless reception of return channel signals in a satellite communications system having at least one satellite and a plurality of subscribers. A system time reference is transmitted to the plurality of subscribers for establishing a precision frequency reference that is based on the system time reference. Return channel signals are wirelessly received from the plurality of subscribers using a carrier frequency synthesized from the precision frequency reference established from the system time reference.
21 Citations
34 Claims
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1. A method for enabling wireless reception of return channel signals in a satellite communications system having at least one satellite and a plurality of subscribers, the method comprising the steps of:
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transmitting, to the plurality of subscribers, a system time reference for establishing a precision frequency reference that is based on the system time reference; and
wirelessly receiving return channel signals from the plurality of subscribers using a carrier frequency synthesized from the precision frequency reference established from the system time reference.
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2. A method for enabling wireless reception of return channel signals in a satellite communications system having at least one satellite and a plurality of subscribers, the method comprising the steps of:
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transmitting, to each of the plurality of subscribers, a system time reference for respectively establishing time bases there from, each of the time bases being respectively specific to one of the plurality of subscribers; and
wirelessly receiving the return channel signals from the plurality of subscribers respectively in accordance with the time bases of the plurality of subscribers. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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9. A method for enabling wireless transmission of return channel signals in a satellite communications system having at least one satellite and a plurality of subscribers, the method comprising the steps of:
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receiving, from the at least one satellite, a system time reference for establishing a precision frequency reference that is based on the system time reference;
synthesizing a carrier frequency from the precision frequency reference established from the system time reference; and
wirelessly transmitting the return channel signal to the at least one satellite using the carrier frequency.
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10. A method for enabling wireless transmission of return channel signals in a satellite communications system having at least one satellite and a plurality of subscribers, the method comprising the steps of:
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receiving a system time reference from the at least one satellite;
establishing a subscriber-specific time base from the system time reference;
wirelessly transmitting a return channel signal to the at least one satellite in accordance with the subscriber-specific time base. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An apparatus for enabling wireless reception of return channel signals in a satellite communications system having at least one satellite and a plurality of subscribers, the apparatus comprising:
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a transmitter for transmitting, to the plurality of subscribers, a system time reference for establishing a precision frequency reference that is based on the system time reference; and
a receiver for wirelessly receiving return channel signals from the plurality of subscribers using a carrier frequency synthesized from the precision frequency reference established from the system time reference.
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19. An apparatus for enabling wireless reception of return channel signals in a satellite communications system having at least one satellite and a plurality of subscribers, the apparatus comprising:
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a transmitter for transmitting, to each of the plurality of subscribers, a system time reference for respectively establishing time bases there from, each of the time bases being respectively specific to one of the plurality of subscribers; and
a receiver for wirelessly receiving the return channel signals from the plurality of subscribers respectively in accordance with the time bases of the plurality of subscribers. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. An apparatus for enabling wireless transmission of return channel signals in a satellite communications system having at least one satellite and a plurality of subscribers, the apparatus comprising:
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a receiver for receiving, from the at least one satellite, a system time reference for establishing a precision frequency reference that is based on the system time reference;
a frequency synthesizer for synthesizing a carrier frequency from the precision frequency reference established from the system time reference; and
a transmitter for wirelessly transmitting the return channel signal to the at least one satellite using the carrier frequency.
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27. An apparatus for enabling wireless transmission of return channel signals in a satellite communications system having at least one satellite and a plurality of subscribers, the apparatus comprising:
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a receiver for receiving a system time reference from the at least one satellite;
a time base circuit for establishing a subscriber-specific time base from the system time reference;
a transmitter for wirelessly transmitting a return channel signal to the at least one satellite in accordance with the subscriber-specific time base. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34)
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Specification