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Methods And Systems For Rapid Detection Of Digital Radio Signals

  • US 20140355726A1
  • Filed: 05/31/2013
  • Published: 12/04/2014
  • Est. Priority Date: 05/31/2013
  • Status: Active Grant
First Claim
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1. A receiver system for detecting digital content in a radio frequency (RF) channel, comprising:

  • front-end circuitry configured to receive radio frequency (RF) signals and to output signals associated with a channel within the RF signals;

    analog-to-digital conversion (ADC) circuitry configured to receive the output signals and to output digital samples having a real component (I) and an imaginary component (Q);

    complex magnitude determination circuitry configured to receive the digital samples and to generate complex magnitudes for the digital samples;

    sliding window averaging filter circuitry configured to subsample the complex magnitudes, to apply a sliding window average to the subsampled complex magnitudes, and to output subsampled magnitude values; and

    shape detection circuitry configured to utilize subsampled magnitude values over a plurality of symbol times to determine if digital content is present within the channel having a digital content shaping function, the symbol time and the digital content shaping function being associated with digital content to be detected.

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