1FST4SIM(1)                       WSJT-X Manual                      FST4SIM(1)
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NAME

6       fst4sim, qra64sim - Generate simulated QRA64, FST4, and FST4W mode
7       signals.
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SYNOPSIS

10       qra64sim msg A-E Nsigs fDop DT Nfiles SNR
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12       fst4sim msg TRsec f0 DT h fDop del Nfiles SNR W
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DESCRIPTION

15       fst4sim can be used to generate FST4 and FST4W signals with
16       user-specified message content, mode parameters, and SNR values.
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ARGS

19       msg
20           A valid QRA64, FST4, or FST4W message enclosed in quotation marks.
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22       A-E
23           QRA64 sub-mode designator.
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25       Nsigs
26           Number of signals to simulate, distributed even across a 2000 Hz
27           bandwidth.
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29       TRsec
30           A valid T/R period duration (s).
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32       f0
33           Integer signal frequency offset (Hz).
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35       DT
36           Decimal signal time offset (s).
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38       h
39           A valid modulation index.
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41       fDop
42           Decimal Doppler frequency spread (Hz).
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44       del
45           Decimal Watterson model delay (ms).
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47       nfiles
48           Number of files to generate.
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50       snr
51           Add Guassian noise to simulate SNR in 2500 Hz bandwidth.
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53       W
54           Hint to break ties between ambiguous messages 0 as 77-bit (FST4), 1
55           as 50-bit (FST4W).
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57       Generated files are 12000 Hz sample rate, 16-bit unsigned format, mono
58       PCM .WAV files suitable for replay using WSJT-X either vie the GUI
59       wsjtx(1) or using the command line slow mode decoder jt9(1). Files are
60       named 000000_nnnnnn.wav (000000_nnnn.wav for QRA64), where nnnnnn or
61       nnnn increments from zero.
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AUTHOR

64       Joe Taylor, K1JT.
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COPYING

67       fcal is Copyright © 2001 - 2019 by Joseph H. Taylor, Jr., K1JT, with
68       contributions from additional authors. WSJT-X is Open Source software,
69       licensed under the GNU General Public License (GPLv3).
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71       This program is distributed in the hope that it will be useful, but
72       WITHOUT ANY WARRANTY; without even the implied warranty of
73       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
74       General Public License for more details.
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78AsciiDoc 2.6.1                    02/20/2023                        FST4SIM(1)
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