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Systems and methods for terrestrial reuse of cellular satellite frequency spectrum in a time-division duplex mode

  • US 7,593,724 B2
  • Filed: 12/08/2003
  • Issued: 09/22/2009
  • Est. Priority Date: 09/14/2001
  • Status: Active Grant
First Claim
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1. A satellite radiotelephone system comprising:

  • a space-based component that is configured to receive wireless communications from radiotelephones in a satellite footprint over an uplink satellite radiotelephone frequency and to transmit wireless communications to the radiotelephones over a downlink satellite radiotelephone frequency; and

    an ancillary terrestrial network that is configured to transmit wireless communications to, and receive wireless communications from, the radiotelephones over the downlink satellite radiotelephone frequency in a time-division duplex mode.

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