COMMUNICATION SYSTEM EMPLOYING REUSE OF SATELLITE SPECTRUM FOR TERRESTRIAL COMMUNICATION

摘要

A terrestrial communication system using satellite uplink and downlink frequencies is disclosed. A terrestrial cell site produces a signal at a satellite downlink frequency that is transmitted to a terrestrial user terminal. The terrestrial cell site receives a signal at a satellite uplink 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.