Non-interfering utilization of non-geostationary satellite frequency band for geostationary satellite communication
DCFirst Claim
1. A geostationary orbit (GSO) satellite for relayed communications comprising:
- an antenna for receiving a spot beam signal from a GSO earth station;
a down converter coupled to the antenna for generating a down-converted signal from the received spot beam signal;
a band-pass filter coupled to the down converter and having a frequency response that allows passing of a signal at least partially occupying a frequency spectrum allocated to a non-geostationary orbit (NGSO) signal on a primary basis, for generating a first output signal based on the down-converted signal; and
a switch coupled to the band-pass filter and having a first and a second position, wherein in the first position, the switch permits transmission of the first output signal toward Earth, and wherein in the second position, the switch suppresses transmission of the first output signal toward Earth; and
wherein the switch is controllable to be placed in the first or the second position based on information relating to occurrence of an in-line event involving the GSO satellite and an NGSO satellite.
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Abstract
A method, satellite and system utilizes non-geostationary satellite orbit (NGSO) frequency spectrum in geostationary satellite orbit (GSO) satellite communication in a non-interfering manner. A ground station transmits signals to a GSO satellite using a GSO frequency band and an extended frequency spectrum including the an NGSO frequency band whenever a noninterference situation exists, i.e., when an NGSO satellite is not in-line between the earth terminal and the GSO satellite or when the NGSO satellite is not utilizing the NGSO band of interest. A command module is provided to instruct the ground station to transmit signals to the GSO satellite using the GSO frequency band and the extended frequency spectrum.
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Citations
17 Claims
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1. A geostationary orbit (GSO) satellite for relayed communications comprising:
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an antenna for receiving a spot beam signal from a GSO earth station; a down converter coupled to the antenna for generating a down-converted signal from the received spot beam signal; a band-pass filter coupled to the down converter and having a frequency response that allows passing of a signal at least partially occupying a frequency spectrum allocated to a non-geostationary orbit (NGSO) signal on a primary basis, for generating a first output signal based on the down-converted signal; and a switch coupled to the band-pass filter and having a first and a second position, wherein in the first position, the switch permits transmission of the first output signal toward Earth, and wherein in the second position, the switch suppresses transmission of the first output signal toward Earth; and wherein the switch is controllable to be placed in the first or the second position based on information relating to occurrence of an in-line event involving the GSO satellite and an NGSO satellite. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for relayed communications using a geostationary orbit (GSO) satellite comprising:
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receiving a spot beam signal at the GSO satellite from a GSO earth station; generating a down-converted signal from the received spot beam signal; using a band-pass filter having a frequency response that allows passing of a signal at least partially occupying a frequency spectrum allocated to a non-geostationary orbit (NGSO) signal on a primary basis, to generate a first output signal based on the down-converted signal; and using a switch having a first and a second position to control transmission of the first output signal toward Earth, wherein in the first position, the switch permits transmission of the first output signal toward Earth, and wherein in the second position, the switch suppresses transmission of the first output signal toward Earth; and wherein the switch is controllable to be placed in the first or the second position based on information relating to occurrence of an in-line event involving the GSO satellite and an NGSO satellite. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A system for relayed communications using a geostationary orbit (GSO) satellite comprising:
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means for receiving a spot beam signal at the GSO satellite from a GSO earth station; means for generating a down-converted signal from the received spot beam signal; means for passing of a signal at least partially occupying a frequency spectrum allocated to a non-geostationary orbit (NGSO) signal on a primary basis, to generate a first output signal based on the down-converted signal; and means for switching having a first and a second position to control transmission of the first output signal toward Earth, wherein in the first position, the means for switching permits transmission of the first output signal toward Earth, and wherein in the second position, the means for switching suppresses transmission of the first output signal toward Earth; and means for controlling, to place the means for switching in the first or the second position based on information relating to occurrence of an in-line event involving the GSO satellite and an NGSO satellite.
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Specification