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Detection of time-frequency codes using a spectrogram

  • US 20070098045A1
  • Filed: 10/23/2006
  • Published: 05/03/2007
  • Est. Priority Date: 11/03/2005
  • Status: Active Grant
First Claim
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1. An oscilloscope adapted for detecting a frequency hopping pattern of a frequency hopping signal, comprising:

  • an input for receiving a signal under test;

    an acquisition unit for sampling said signal under test, producing digital signal samples, and storing said digital signal samples in an acquisition memory;

    waveform processing circuitry for processing said digital signal samples;

    a waveform memory for storing said processed digital signal samples;

    a display device for displaying a representation of said processed digital signal samples; and

    a controller for controlling said acquisition unit, said waveform processing unit, and said display device;

    wherein said controller controls calculation of a spectrogram from said digital signal samples, estimation of a TFC for said signal under test, determination of whether said estimated TFC matches a known TFC, and display of said TFC on said display screen.

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