Automatic Digital Modulation Identification Recognition

 

Amateur Radio Digital modes:

AMTOR/SITOR, APRS,CLOVER, CW,  Digital SSTV, G-TOR, Hellschreiber Feld/ psk/FM/DUPLO/C/MT, MFSK, MFSK8, MFSK16, MT63, PACKET,  PACTOR I, PACTOR II, PACTOR III, psk10, psk16, psk31 BPSK, psk31, psk122, psk125F,  QPSK, psk63, RTTY ITA2 ITA5,  THROB DPSK, and others! A signal is a signal is a signal! But is it one that decodes to digital to a digital program?

 

Trying to identify a single Amateur radio Digital Mode is a problem. There is no single Digital software program that may be used to work every mode. A mode must be identified and then the Digital software program for that mode, must be selected to work that mode.

 

To identify a signal.

 

There is no single software or hardware (available to Amateur Radio) that can automatically identify every Amateur Radio signal; I don’t think the SIGINT people will avail their software.

1.        Audio Signal Analyzer: SpectrumLab v204b29 (speclab24b29.zip)  www.xs4all.nl/~nl9222/software.htm 

                  Analyzer 2000 v5.04  (not Freeware)      www.dxzone.com  maybe used to manually identify signals, once setup to include

                   all Amateur Radio Signals.

                Once the Analyzer identifies the signal, the program must be closed and the Digital Mode Program opened.

        2.     Identify the signal by sound.  Once the signal is identified, by comparing that sound against a library of

                Amateur Radio Signal Sounds, the Digital Mode Program can be selected and opened. However; I haven’t

                found a source for all Amateur Radio Signal Sounds. And doubt there is one.

        3.      Spectrogram v5.0.8  (gram517.zip)  http://neasmn.org/ben/software/software.htm 

                 Oscilloscope Dual-trace WinScope 2.51 ( osc251.zip)  www.electronicsaustralia.com.au/cgi-bin/downloads.pl?area=5

                   maybe used to manually identify signals.  

 

Maybe the best option is 3.  However, I haven’t found a Spectrogram source for every Amateur radio Signal image. There are some documented images, and with the help of  Spectrogramv5.08 and IfranView32 viewer, other signals can be found, saved and printed. The best operation maybe:

1.        Operate the  Spectrogram program at all times.

2.        Identify the Digital  signals by comparing the Spectrogram image to a printed image that had been identified.

3.        Select the Digital mode program for that signal.