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Methods for detecting and classifying signals transmitted over a radio frequency spectrum

  • US 8,055,204 B2
  • Filed: 08/15/2007
  • Issued: 11/08/2011
  • Est. Priority Date: 08/15/2007
  • Status: Expired due to Fees
First Claim
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1. A method for classifying a signal within a channel, the method comprising:

  • receiving a radio frequency signal at a signal classifier;

    determining whether the signal is a narrowband signal by comparing a first threshold and a second threshold to the received signal, and determining a percentage of the spectrum occupied by the signal above the second threshold, wherein the second threshold is lower than the first threshold;

    comparing a mask to the spectrum within the channel to determine a degree of correlation between the mask and the received signal;

    if the degree of correlation between the mask and the received signal is above a correlation threshold, classifying the received signal as a target signal; and

    if the received signal is not determined to be a narrowband signal or a target signal, classifying the signal as a wideband signal.

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