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Method for amplitude insensitive packet detection

  • US 8,085,879 B2
  • Filed: 07/23/2009
  • Issued: 12/27/2011
  • Est. Priority Date: 09/12/2003
  • Status: Expired due to Fees
First Claim
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1. A method, comprising:

  • converting a radio frequency (RF) signal into in-phase (I) and quadrature (Q) baseband signals;

    removing direct current (DC) offsets from the I and Q baseband signals to generate I and Q corrected signals;

    mapping the I and Q corrected signals to a quadrature phase shift keying (QPSK) constellation to generate mapped I and Q baseband signals;

    using a complex correlator to correlate the mapped I and Q baseband signals to a reference signal to generate complex correlated I and Q baseband signals; and

    determining receipt of a data packet in the RF signal responsive to at least a portion of the complex correlated I and Q baseband signals exceeding a predetermined threshold.

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