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Cellular/satellite communications system with improved frequency re-use

  • US 5,848,060 A
  • Filed: 08/21/1995
  • Issued: 12/08/1998
  • Est. Priority Date: 01/11/1994
  • Status: Expired due to Term
First Claim
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1. A satellite communications system employing a multiple element antenna receiving signals on a first frequency band and relaying said signals to a ground station on a second frequency band including:

  • downconverting means for converting signals received at each of said multiple antenna elements on said first frequency band to corresponding baseband signals;

    multiplexing means for directly receiving and time-division multiplexing said corresponding baseband signals to form a multiplexed sample stream; and

    modulator means for modulating a carrier in said second frequency band with said multiplexed sample stream and transmitting said modulated carrier to said ground station;

    wherein said downconverting means comprise quadrature downconverting means producing an I and a Q baseband signals.

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