fst4sim - Man Page
Generate simulated QRA64, FST4, and FST4W mode signals.
Synopsis
qra64sim msg A-E Nsigs fDop DT Nfiles SNR
fst4sim msg TRsec f0 DT h fDop del Nfiles SNR W
Description
fst4sim can be used to generate FST4 and FST4W signals with user-specified message content, mode parameters, and SNR values.
Args
- msg
A valid QRA64, FST4, or FST4W message enclosed in quotation marks.
- A-E
QRA64 sub-mode designator.
- Nsigs
Number of signals to simulate, distributed even across a 2000 Hz bandwidth.
- TRsec
A valid T/R period duration (s).
- f0
Integer signal frequency offset (Hz).
- DT
Decimal signal time offset (s).
- h
A valid modulation index.
- fDop
Decimal Doppler frequency spread (Hz).
- del
Decimal Watterson model delay (ms).
- nfiles
Number of files to generate.
- snr
Add Guassian noise to simulate SNR in 2500 Hz bandwidth.
- W
Hint to break ties between ambiguous messages 0 as 77-bit (FST4), 1 as 50-bit (FST4W).
Generated files are 12000 Hz sample rate, 16-bit unsigned format, mono PCM .WAV files suitable for replay using WSJT-X either vie the GUI wsjtx(1) or using the command line slow mode decoder jt9(1). Files are named 000000_nnnnnn.wav (000000_nnnn.wav for QRA64), where nnnnnn or nnnn increments from zero.
Author
Joe Taylor, K1JT.
Copying
fcal is Copyright © 2001 - 2019 by Joseph H. Taylor, Jr., K1JT, with contributions from additional authors. WSJT-X is Open Source software, licensed under the GNU General Public License (GPLv3).
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
Referenced By
The man page qra64sim(1) is an alias of fst4sim(1).