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Method and apparatus for start of frame delimiter detection

  • US 8,831,070 B2
  • Filed: 06/21/2011
  • Issued: 09/09/2014
  • Est. Priority Date: 06/24/2010
  • Status: Active Grant
First Claim
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1. A method for detecting a known start of frame delimiter pattern in a received stream of samples of a data packet, said data packet comprising at least a preamble portion and a header portion, said preamble portion preceding said header portion and containing said start of frame delimiter pattern, the method comprising the steps of:

  • correlating a portion of said received stream of samples of said data packet with a first sequence corresponding to said start of frame delimiter pattern, thereby obtaining a first correlation result;

    comparing said first correlation result with a given threshold;

    correlating said portion of said received stream of samples with a second sequence, said second sequence derived from a pattern present in said preamble portion and different from said first sequence, thereby obtaining a second correlation result;

    comparing said first correlation result with said second correlation result;

    deciding that said start frame delimiter pattern has been detected, if said first correlation result is larger than said given threshold and larger than said second correlation result;

    otherwise, repeating the previous steps with a further portion of said first and second sequence.

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