jj1bdx/airspy-fmradion

Smaller latency for CW/SSB/WSPR reception

jj1bdx opened this issue · 0 comments

jj1bdx commented

Things to do:

  • Stop using 48kHz <-> 12kHz resampling
    • Increase latency during these rate conversions
  • Steep filter for CW/SSB with 48kHz sampling rate
    • Order: > 1000
      • How to design? SciPy? pyfda?
    • CW/WSPR: 250Hz (i.e., +-125Hz) 0dB passband bandwidth, 400Hz -90dB passband bandwidth
    • SSB: 2800Hz (i.e., +-1500Hz) 0dB passband bandwidth, 3000Hz -90dB passband bandwidth