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Weak signal detection in wireless communication systems

  • US 8,335,283 B1
  • Filed: 11/11/2008
  • Issued: 12/18/2012
  • Est. Priority Date: 11/11/2008
  • Status: Expired due to Fees
First Claim
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1. A method for implementing weak signal packet detection comprising:

  • performing cross-correlation and self-correlation operations on a plurality of short training field (STF) symbols associated with a plurality of RF signals received at a plurality of receiver chains of a wireless receiver;

    summing a plurality of self-correlation outputs generated in the plurality of receiver chains;

    weighting the sum of the self-correlation outputs, wherein said weighting the sum of the self-correlation outputs comprises;

    calculating a power of the plurality of STF symbols associated with the plurality of RF signals received at the plurality of receiver chains;

    summing the calculated power outputs generated in the plurality of receiver chains; and

    dividing the sum of the self-correlation outputs by the sum of the calculated power outputs;

    accumulating the weighted sum of the self-correlation outputs over a predetermined number of STF symbol periods;

    performing a moving sum operation on the accumulation output when the accumulation output is greater than a first predetermined threshold; and

    generating a signal indicating a data packet has been detected when the moving sum output is greater than a second predetermined threshold.

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