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Apparatus and method for reusing satellite broadcast spectrum for terrestrially broadcast signals

DC
  • US 5,761,605 A
  • Filed: 10/11/1996
  • Issued: 06/02/1998
  • Est. Priority Date: 10/11/1996
  • Status: Expired due to Term
First Claim
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1. An apparatus for simultaneously providing terrestrially transmitted signals on a common frequency with direct broadcast satellite signals transmitted from a satellite in a first satellite location in geosynchronous orbit about the earth, the apparatus comprising:

  • (a) a first antenna at a user location for receiving signals at a first frequency only within a first directional reception range as measured from a centerline of the first antenna, the first antenna having its centerline aligned to receive direct broadcast satellite signals transmitted from the satellite;

    (b) a second antenna at the user location for receiving signals at the first frequency only within a second directional reception range as measured from a centerline of the second antenna, the second antenna being aligned to receive signals transmitted at the first frequency from a terrestrial transmitter location remote from the user location with the direct broadcast satellite signals transmitted in directions outside of the second directional reception range; and

    (c) a terrestrial transmitter for transmitting signals at the first frequency and directionally within a terrestrial azimuth range from the terrestrial transmitter location, the terrestrial transmitter location being located with respect to the user location such that the terrestrial transmitter transmits in directions only outside of the directional reception range of the first antenna.

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