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Method and apparatus for detecting the presence of a signal in a frequency band using non-uniform sampling

  • US 8,553,808 B2
  • Filed: 12/13/2006
  • Issued: 10/08/2013
  • Est. Priority Date: 12/13/2006
  • Status: Expired due to Fees
First Claim
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1. A method for detecting a presence of a signal comprising of:

  • generating a pseudo random sequence to determine non-uniform time periods;

    sampling an analog input signal at the non-uniform time periods to produce discrete signal samples;

    determining that a signal is present in a frequency band when an energy versus frequency spectrum of the discrete signal samples exceeds an energy setpoint at the frequency band.

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