Posted on by Tom Zicarelli

Nonoo radio DSP tutorials (RTTY)

By Norbert Varga

http://dp.nonoo.hu/projects/ham-dsp-tutorial/

From the IIR RTTY tutorial, a Paper on decoding RTTY in Linux:

http://www.ele.uva.es/~jesus/rtty/rtty-2.0/doc/rtty.pdf

Other resources on RTTY / FSK decoding

  1. RTTY decoder application and paper describing the method.
  2. RTTY diddles, about the protocol
  3. DPLL theory
  4. Bit banging, simple bit synchronization
  5. UART character recovery
  6. FSK signals and demodulation
  7. FSK demodulation theory
  8. Receiver sync theory
Getting started on RTTY

http://www.aa5au.com/gettingstarted/rtty_diddles_technical.htm