HW 13b

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Installing Ubuntu

GNU Radio + GNU Radio Companion

  • GNU Radio Companion is installed with GNU Radio 3.2 and above. Install from the trunk. Synaptic Package Manager will only install 3.0.4
  • GNU Radio Companion is the GUI for GNU Radio

Installing GNU Radio + GNU Radio Companion

SSB Demodulation

  • Convert the *.auf files (and not the *.au files) using Audacity, note the sampling rate
  • Wave source allows you to play the converted *.wav files
  • Bandpass filter to single out the 3kHz (and get rid of the 1/f noise at the same time)
  • Shift down to baseband with a cosine wave
  • Low pass filter to single out the signal at the baseband (and to throw out the signal at +/- 2f)
  • Use your favorite sink to hear/see the results

Possibly promising links

dOxygen filters

Questions

  • What is dOxygen
  • How to incorporate filters into GNU Radio/Companion