Hybrid space system based on a constellation of low-orbit satellites working as space repeaters for improving the transmission and reception of geostationary signals
First Claim
Patent Images
1. Telecommunications system, intended for low-throughput data transfer between at least two users located substantially on the surface of a celestial body, comprising:
- at least two transmitting/receiving surface terminals, each associated with a different user,one or more stationary means GEO above the surface of the celestial body, these stationary means being able to transmit data from and to a predefined coverage area with a line of sight to the stationary means, andone or more signal repeater to repeat signals transmitted and/or received from the stationary means GEO and the surface terminals, said repeater traveling above the surface of the celestial body and comprising means of performing an amplification without frequency translation of the signal received from the stationary means GEO;
a same frequency band being used for communications between the surface terminals and the repeater and for communications between the repeater and the stationary means; and
wherein at least one user terminal utilizes a CDMA type interface to manage arrival of two signals bearing Doppler and delay differences.
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Accused Products
Abstract
The remote communications system, intended for low-throughput data transfer between at least two users located substantially on the surface of a celestial body, includes:
- a plurality of transmitting/receiving surface terminals, each associated to a user,
- one or more geostationary element installed on board satellites placed in geostationary orbit around the celestial body, these geostationary elements being able to transmit data from and to a predefined coverage area on the surface of the celestial body with a line of sight to the geostationary satellite,
- and one or more signal repetition element for the signals transmitted and/or received from the geostationary elements to the surface terminals these traveling repetition elements being on board satellites moving in a traveling orbit; the same frequency band is used for communications between the surface terminals and the traveling elements and for communications between the traveling elements and the geostationary elements.
10 Citations
15 Claims
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1. Telecommunications system, intended for low-throughput data transfer between at least two users located substantially on the surface of a celestial body, comprising:
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at least two transmitting/receiving surface terminals, each associated with a different user, one or more stationary means GEO above the surface of the celestial body, these stationary means being able to transmit data from and to a predefined coverage area with a line of sight to the stationary means, and one or more signal repeater to repeat signals transmitted and/or received from the stationary means GEO and the surface terminals, said repeater traveling above the surface of the celestial body and comprising means of performing an amplification without frequency translation of the signal received from the stationary means GEO;
a same frequency band being used for communications between the surface terminals and the repeater and for communications between the repeater and the stationary means; and
wherein at least one user terminal utilizes a CDMA type interface to manage arrival of two signals bearing Doppler and delay differences. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Telecommunications method, intended for low-throughput data transfer between two users located substantially on the surface of a celestial body;
- the first user being equipped with a user terminal, with a line of sight to at least one repeater, and the repeater having a line of sight to at least one stationary means above the surface of the celestial body, the stationary means configured to transmit data from and to a predefined coverage area, the method comprises the steps of;
transmitting a first uplink signal, representative of data to be transmitted, to the repeater by the first user'"'"'s terminal; receiving and amplifying the first uplink signal transmitted by the user terminal on the ground; and transmitting the amplified first uplink signal in the form of a second uplink signal to the stationary means without frequency translation in the same frequency band as the first uplink signal by the repeater, the stationary means ensuring a final transmission of data to a user terminal of the second user and utilizing a CDMA type interface by at least one user terminal to manage arrival of two signals bearing Doppler and delay differences.
- the first user being equipped with a user terminal, with a line of sight to at least one repeater, and the repeater having a line of sight to at least one stationary means above the surface of the celestial body, the stationary means configured to transmit data from and to a predefined coverage area, the method comprises the steps of;
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15. Telecommunications method, intended for low-throughput data transfer between two users located substantially on the surface of a celestial body;
- the second user being equipped with a second user terminal, with a line of sight to at least one repeater and the repeater having a line of sight to at least one stationary means, the method comprises the steps of;
retransmitting a signal, representative of data to be transmitted, received from a first user via a GES connection station, to the repeater in the form of a first downlink signal by the stationary means; receiving and amplifying the first downlink signal transmitted by the stationary means; transmitting the amplified first downlink signal to the second user'"'"'s terminal on the ground without frequency translation in the same frequency band as the first downlink signal in the form of a second downlink signal by the repeater; and utilizing CDMA type interface by at least one user terminal to manage arrival of two signals bearing Doppler and delay differences.
- the second user being equipped with a second user terminal, with a line of sight to at least one repeater and the repeater having a line of sight to at least one stationary means, the method comprises the steps of;
Specification