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Equalizer with decision feedback frequency tracking and bit decoding for spread spectrum communications

  • US 20050100081A1
  • Filed: 10/01/2003
  • Published: 05/12/2005
  • Est. Priority Date: 10/01/2003
  • Status: Active Grant
First Claim
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1. A spread spectrum communications system, comprising:

  • (A) a transmitter, said transmitter further comprising;

    (1) a data source;

    (2) a first mixer spreading data from said data source with a first pseudo noise source (PNA);

    (3) a second mixer spreading data from said first mixer with a second pseudo noise source (PNB);

    (4) an RF transmitter;

    (b) a receiver, said receiver further comprising;

    (1) an RF receiver;

    (2) a plurality of frequency shifters, receiving a signal from said RF receiver;

    (3) a plurality of PNB matched filters receiving signals from said RF receiver and said plurality of frequency shifters;

    (4) a plurality of frequency shifters, receiving a signal from said plurality of PNB matched filters;

    (5) a plurality of PNA matched filters receiving data from said plurality of PNB matched filters and said plurality of frequency shifters; and

    (6) an equalizer/decoder receiving signals from said plurality of PNA matched filters.

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