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.