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Preamble code structure and detection method and apparatus

  • US 6,154,486 A
  • Filed: 12/31/1998
  • Issued: 11/28/2000
  • Est. Priority Date: 06/05/1995
  • Status: Expired due to Term
First Claim
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1. A method for communicating comprising the steps of:

  • transmitting a repeated codeword preamble code from a first station to a second station, said repeated codeword preamble code comprising a repeated series of the same subcode;

    receiving said repeated codeword preamble code at said second station;

    generating a plurality of correlation spikes in response to receiving said repeated codeword preamble code at said second station, each of said correlation spikes corresponding to a separate appearance of said subcode at said second station;

    determining receipt of said repeated codeword preamble code upon simultaneous detection of more than one of said correlation spikes;

    synchronizing a receiver at said second station in response to said repeated codeword preamble code;

    transmitting a data message from said first station to said second station; and

    receiving said data message at said second station.

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