Communication system employing reuse of satellite spectrum for terrestrial communication
First Claim
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1. A terrestrial communication system using satellite uplink and downlink frequencies used by satellites, comprising:
- at least one terrestrial user terminal transmitting, without using said satellites, a first signal on at least one satellite downlink frequency and receiving, without using said satellites, a second signal on at least one satellite uplink frequency, wherein the first signal frequency is different than the second signal frequency.
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Abstract
A terrestrial communication system using satellite uplink and downlink frequencies is disclosed. A terrestrial cell site produces a signal at a satellite uplink frequency that is transmitted to a terrestrial user terminal. The terrestrial cell site receives a signal at a satellite downlink frequency that was transmitted by a terrestrial user terminal. The terrestrial cell site may include a signal nulling means in the direction of a satellite producing signals at the uplink and downlink frequencies.
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Citations
8 Claims
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1. A terrestrial communication system using satellite uplink and downlink frequencies used by satellites, comprising:
at least one terrestrial user terminal transmitting, without using said satellites, a first signal on at least one satellite downlink frequency and receiving, without using said satellites, a second signal on at least one satellite uplink frequency, wherein the first signal frequency is different than the second signal frequency. - View Dependent Claims (2)
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3. A terrestrial communication system using satellite uplink and downlink frequencies used by satellites, comprising:
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a terrestrial terminal unit producing a first signal at a satellite downlink frequency that is transmitted without using said satellites within the terrestrial communication system, and said terrestrial terminal unit receiving a second signal at a satellite uplink frequency different than the satellite downlink frequency that was transmitted without using said satellites from within the terrestrial communication system. - View Dependent Claims (4)
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5. A method of minimizing interference between terrestrial user communications and satellite user communications, comprising:
reversing the transmission frequency band and reception frequency band for the terrestrial user relative to the satellite user, wherein the reception frequency bands are different than the transmission frequency band. - View Dependent Claims (6)
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7. A method of reusing satellite spectrum for terrestrial communications, comprising:
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assigning satellite frequency bands so that terrestrial users and satellite users on the ground within the same geographic region are using different satellite uplink and downlink bands; and adding pattern nulls to terrestrial antennas, that transmit and receive signals from terrestrial users, to block satellite interference. - View Dependent Claims (8)
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Specification