1. 06 Jan, 2019 1 commit
    • Manolis Surligas's avatar
      Increase CW sensitivity · 41040910
      Manolis Surligas authored
      * Switch from amplitude based approach to auto-correlation
      * Limit the bandwidth of the PLL using a low pass filter
      * Reject noise of the PLL using a very steep low pass after it
  2. 23 Nov, 2018 1 commit
  3. 18 Jul, 2018 3 commits
    • Manolis Surligas's avatar
      Tune CW parameters · 6b1e3d38
      Manolis Surligas authored
      * Set the loop bandwith of the PLL to a lower value, to get rid off the
      DC leakage and improve SNR
      * Set the AGC update rate to a higher value
      * Decrease the CW decoding threshold
    • Manolis Surligas's avatar
      Fix CW decoder · 85219e5d
      Manolis Surligas authored
      * Fix CW decoder
      * Link with boost chrono to avoid a linking error in boost 1.67
    • Patrick Dohmen's avatar
      Improve sensitivity · dbfb6e65
      Patrick Dohmen authored
  4. 25 Mar, 2018 1 commit
  5. 23 Feb, 2018 1 commit
  6. 05 Jan, 2018 1 commit
  7. 02 Nov, 2017 1 commit
  8. 01 Nov, 2017 3 commits
  9. 25 Jul, 2017 1 commit
  10. 20 Jul, 2017 1 commit
    • Manolis Surligas's avatar
      Add support for passing manually various device parameters · f3de63ca
      Manolis Surligas authored
      All flowgraphs now support user defined parameters for most of their
      configuration capabilities. These include:
      * RF gain
      * IF gain
      * BB gain
      * Custom device arguments for setups with multiple SDRs. These
      coresponds to the 'Device arguments' field of the Osmocom source block.
      * Antenna selection for devices with multiple antennas (USRPs, etc)
      Changing sampling rate is not supported (yet).
      For listing the arguments just execute <flowgraph> --help in a terminal
  11. 07 Nov, 2016 1 commit
  12. 31 Oct, 2016 1 commit
  13. 17 Oct, 2016 1 commit
  14. 12 Oct, 2016 1 commit
    • Manolis Surligas's avatar
      Improve the generic FM demodulator · ce8d54eb
      Manolis Surligas authored
      The FM demodulator now supports a variaty of hardware setups and saves
      the WAV file for further processing. A set of command line arguments can
      control most of the flowgraph internals, such as the wav file name and
      storage path e.t.c.
      TODO: Check the settings for all the available hardware
  15. 08 May, 2016 1 commit
    • Manolis Surligas's avatar
      Add FM demodulation flowgraph with RIGCTL support · 5e1667ff
      Manolis Surligas authored
      The FM demodulation flowgraph uses the high performance Xlating FIR
      filter for filtering and frequency centering at the same time. Tuning
      the SDR in a frequency different than the frequency of interest, we
      avoid the DC offset that the of the SDR. As far the audio sampling rate
      concerns, various configurations are supported due to the Polyphase
      Filter-bank arbitrary resampler.
       The flowgraph supports also doppler compensation based on RIGCTL
      commands. Instead of chaning the SDR frequency, we digitally perform the
      proper correction to avoid noise and lost samples during the frequency
      re-configuration. The doppler correction mechanism gathers the frequency
      changes from the RIGCTL daemon, and predicts the frequency changes
      between the RIGCTL messages for better and more fine-grained correction. 
  16. 24 Apr, 2016 1 commit