fa44ed84c5
Remove an unused routine. Minor tweaks.
2019-07-03 10:55:13 -05:00
e7889ba11b
FT4: candidates within 20 Hz of nfqso are presented to the decoder first.
2019-06-24 11:09:55 -05:00
c26d0b4f29
FT4: Imrovements to sync.
...
Divide DT search range into 3 segments. Search central segment (near DT=0)
first and try to decode the largest peak. Then find the largest peak in each
of the surrounding segments and try to decode those only if the peak is larger
than the one found in the central segment.
Also re-indent ft4_decode.f90 and some other minor tweaks.
2019-06-16 09:46:33 -05:00
7e9cc9cbc7
FT4: Improve sync performance on disturbed channels. Make jt9 command-line option -d work
2019-06-14 16:28:59 -05:00
fc07bd9287
FT4: minor tweak to avoid passing an unnecessary argument and reject bad candidates sooner.
2019-06-12 08:16:10 -05:00
3c23a05d1f
Move demod and bit metric calculation to a subroutine. This will make
...
it easier to experiment with alternative schemes for demod.
2019-06-08 08:34:46 -05:00
f9e9bc01a1
Update some comments, delete obsolete files.
2019-06-05 10:17:59 -05:00
97be1b46b9
Add more protection against the i0 crash that has occurred in getcandidates4.f90.
2019-06-04 14:53:45 -05:00
fc4dcc6d88
Fix a bug that caused FT4 decoding to fail when widegraph Start freq was less than 200 Hz.
2019-05-27 16:34:53 -05:00
8c371d7d66
Remove an obsolete routine.
2019-05-26 09:55:39 -05:00
7e4de91626
Fix a comment.
2019-05-26 09:52:17 -05:00
3bc5e538d2
FT4: Implement polynomial baseline fit.
2019-05-25 10:58:04 -05:00
883c914d29
Make DT=0 mean that the first full symbol starts at t=0.5s. Formerly DT=0 corresponded to the beginning of the ramp-up symbol. Fix a bug that caused signals with large DT to wrap around instead of truncating them.
2019-05-24 20:09:00 -05:00
2ab4b59d88
Fix ft4sim_mult for 7.5 s T/R sequences.
2019-05-23 14:06:00 -04:00
a9623703b3
FT4: Change Fortran code to NSPS=576 and make necessary accompanying
...
changes on the C++ side. Basically works except that Tx audio has
incorrect DT and audio is truncated at the end. Also, command line
decoding using JT9 is not as sensitive as decoding from within WSJT-X.
2019-05-22 17:02:15 -05:00
80307b64ad
Add a temporary research tool.
2019-05-22 17:01:06 -05:00
0668c4fce0
Improve sync at large DT.
2019-05-08 11:34:16 -05:00
0a12b34ec5
Avoid a potential out-of-bounds error.
2019-04-30 08:54:42 -05:00
561af7f411
Avoid zeroing cwave when it is not going to be used.
2019-04-20 09:37:36 -05:00
2746338757
Measure time spent in subtract4.f90.
2019-04-18 17:19:56 -05:00
e8d17a9898
FT4: Subtraction is basically working.
2019-04-18 14:16:39 -05:00
be72461142
FT4: Some groundwork for subtraction.
2019-04-18 14:15:24 -05:00
b3f62276e7
Fix the DT values generated in ft4sim_mult.
2019-04-03 12:45:38 -04:00
9fe179d396
Fix ft8sim_mult to generate synchronous FT4 signals.
2019-04-03 11:48:57 -04:00
6ea9f4990d
Several tweaks to FT4 simulation and decoding procedures. Now -0.5 < DT < 0.5
2019-04-03 10:13:50 -04:00
013c06b6ca
Fix a probmel with decoding FT4 from .wav files.
2019-04-03 09:25:32 -04:00
e0d4c94cc1
Some very basic functionality for time-synchronized FT4.
2019-04-01 14:23:10 -04:00
c7ec9b1927
Fix indenting. No functional changes.
2019-03-30 16:40:24 -05:00
68f82c95de
FT4: Only do the big FFT once for each candidate. Duh.
2019-03-30 15:55:05 -05:00
73efc09392
Speed up sync.
2019-03-28 14:34:03 -05:00
5e1637a5db
Fix a bug and remove a redundant sanity check.
2019-03-28 14:01:30 -05:00
67b9f327a5
Merge branch 'release-2.1.0' of bitbucket.org:k1jt/wsjtx into release-2.1.0
2019-03-28 13:21:02 -04:00
54cd97f918
Protect against bad inferred candidate frequencies f0 in FT4 mode.
2019-03-28 13:07:37 -04:00
fe8aa87401
Add some sanity checks to getcandidates4.f90
2019-03-28 11:13:26 -05:00
3490c0d1e3
Merge branch 'release-2.1.0' of bitbucket.org:k1jt/wsjtx into release-2.1.0
2019-03-28 11:02:20 -05:00
23c54540e7
Increase maximum wav file length to 20s.
2019-03-28 10:59:20 -05:00
6f00ec79a2
Merge branch 'release-2.1.0' of bitbucket.org:k1jt/wsjtx into release-2.1.0
2019-03-28 09:47:50 -04:00
cfb36395e0
Add some better usage examples for ft4sim.
2019-03-28 09:22:29 -04:00
580fce8320
Allow oddball file names for input to ft4d.
2019-03-28 09:21:01 -04:00
a605ff4050
For now, limit noise level estimation to [300,2500] Hz.
2019-03-27 20:55:15 -05:00
43c38de884
Minor tweaks for FT4 debugging and possible tuning.
2019-03-26 14:00:32 -04:00
0fef707118
Widen candidate frequency offset window to f0=[10,4990] Hz.
2019-03-21 13:27:10 -05:00
e150d003d6
Fix an inforrect constant in ft4_rx() that skipped over first 0.208 s of Rx data.
2019-03-13 10:31:23 -04:00
7a0823301a
Remove some temporary code.
2019-03-09 10:03:01 -06:00
8ddf3f8acc
Change default to DT=0.14 s for simulated wav files.
2019-03-09 09:13:26 -06:00
1b591e2c8c
Make ft4d work with cqstr.
2019-03-04 17:26:24 -06:00
d7012267c0
CQ message type strings are now passed from mainwindow.cpp to ft4_decode.f90, to enable AP decoding of special CQ messages.
2019-03-04 17:10:57 -06:00
4769bf45d2
Make FT4 AP decoding work in RTTY RU and Field Day activities.
...
Move Nuttal window to standalone subroutine nuttal_window.f90 and
use Nuttal window in ft4/getcandidates4.f90.
2019-03-03 13:02:22 -06:00
5c7e1ba35d
Complete the code cleanup in ft4sim.
2019-02-27 09:38:59 -05:00
1c617e2367
Minor code cleanup to ft4sim.f90 and ft4sim_mult.f90.
2019-02-27 09:34:40 -05:00
Steve Franke
Joe Taylor
Steven Franke