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Bulk filtering and demodulation of independent FDMA sources

  • US 6,064,645 A
  • Filed: 12/22/1997
  • Issued: 05/16/2000
  • Est. Priority Date: 12/22/1997
  • Status: Expired due to Term
First Claim
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1. A method for bulk processing a plurality of OFDM uplink signals in a satellite, the method comprising the steps of:

  • a. providing a method for synchronizing an OFDM uplink signal at a satellite, said method for synchronizing comprising the following steps;

    a1. receiving at said satellite an OFDM uplink signal transmitted by a CPE;

    a2. comparing reception timing of said OFDM uplink signal with a satellite timing reference and generating a timing correction;

    a3. providing a downlink symbol clock in a downlink beam received by said CPE;

    a4. providing said timing correction in said downlink beam received by said CPE;

    b. producing an equivalent single composite OFDM uplink signal at said satellite by synchronizing at said satellite according to step (a) a plurality of OFDM uplink signals;

    c. applying bulk processing at said satellite on said single composite OFDM uplink signal.

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