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Efficient physical layer preamble format

  • US 8,175,119 B2
  • Filed: 05/15/2009
  • Issued: 05/08/2012
  • Est. Priority Date: 05/15/2008
  • Status: Active Grant
First Claim
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1. A method for generating a preamble of a data unit, the method comprising:

  • generating a short training field (STF) of the preamble to include one of a repeating series of a sequences or a repeating series of b sequences;

    wherein a and b are complementary sequences, wherein a sum of out-of-phase aperiodic autocorrelation coefficients of a and b is zero;

    wherein the STF is associated with at least synchronization information;

    generating a long training field (LTF) of the preamble after the STF to include a′

    sequences and b′

    sequences;

    wherein a′

    is the sequence a cyclically shifted by zero or more positions, and wherein b′

    is the sequence b cyclically shifted by zero or more positions; and

    wherein the LTF is associated with channel estimation information.

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