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WIP: Improve sensitivity

Patrick Dohmen requested to merge DL4PD/gr-satnogs:fix-cw-decoder into master

Some improvements are made:

  • add Doppler Correction block and change update interval
  • Change xlating_decimation to match int(samp_rate_rx/100e3)
  • Change waterfall sink bandwidth
  • Add BFO to shift CW audio to ~1kHz
  • Add Moving Average to sharpen the signal fed into the decoder

This is WIP because the current approach needs some more improvements. Any help is really appreciated!

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