Steven Franke
b087328fc1
Don't waste time on excess BP iterations when doing K=50. Decode a little deeper.
2021-01-04 15:00:03 +00:00
Steven Franke
8079d35561
Append decoder data to file fst4_decodes.dat instead of overwriting.
2021-01-04 15:00:02 +00:00
Steven Franke
89cbd177df
If file decdata is present in the data directory, then write detailed decoder data to file fst4_decodes.dat in the same directory.
2021-01-04 15:00:02 +00:00
Steven Franke
812bd29e54
FST4W: Use K=66 for first OSD decode attempt and for updating fst4w_calls.txt. Use K=50 for 2nd attempt.
2021-01-04 15:00:02 +00:00
Steven Franke
fc3e24f696
More work on K=50 decoding.
2021-01-04 15:00:01 +00:00
Steven Franke
65ff3ce05e
Remove some debug prints.
2021-01-04 15:00:01 +00:00
Steven Franke
11b7aa9429
Implements decoding of FST4W messages as (240,50) crc-less codewords.
...
By cascading the full 24-bit crc generator matrix with the (240,74) LDPC code generator, create a (240,50) generator that is used to decode with approximately 1 dB better sensitivity than the (240,64) with 14-bit CRC approach that is normally used. This approach treats the CRC bits as additional parity bits and provides no means for identifying incorrect codewords. All codewords on the list generated by the OSD algorithm have CRCs that match the CRC of the message payload. Codewords are validated by unpacking the message and comparing the unpacked message with the list of stored callsign/grid pairs stored in the fst4w_calls.txt file.
2021-01-04 14:59:56 +00:00
Joe Taylor
662a43d3dd
Corrections to the frequency-drift feature in q65sim.
2021-01-04 09:07:03 -05:00
Joe Taylor
6074e4e3af
Options for introducing frequency drift and frequency steps (e.g. 10 Hz) in Q65 simulator.
2021-01-03 11:19:39 -05:00
Joe Taylor
a02cbabb99
Fix an off-by-1 bug introduced in the previous commit.
2021-01-03 11:18:14 -05:00
Joe Taylor
04b22ce250
Preparing to add solution for frequendy drift to q65_sync.f90.
2021-01-02 14:21:14 -05:00
Joe Taylor
bc58604d42
Allow optional frequency drift of simulated Q65 signals.
2021-01-02 13:09:47 -05:00
Joe Taylor
e5a8e80c49
Minor tweaks to Q^% decoding scheme.
2021-01-01 15:28:41 -05:00
Joe Taylor
6b351165f2
Re-introduce Q65 timer calls. Extend red sync baseline to minimum +/- 100 Hz.
2021-01-01 10:47:22 -05:00
Joe Taylor
8a4b5b6a40
Various tweaks to the Q65 decoder; new numbering of the end-of-line decoding flags.
2020-12-31 15:52:06 -05:00
Joe Taylor
bcbca02c08
Enforce Q65 ClrAvg action when requested. Tweak somne logic.
2020-12-30 16:12:02 -05:00
Joe Taylor
e07ba410c2
Fix a problem with access to apsym0() array.
2020-12-30 15:40:06 -05:00
Joe Taylor
5d7b5f83e2
Fix several more flaws in the way Q65 decodes are presented.
2020-12-30 15:05:02 -05:00
Joe Taylor
77a0e01b05
Allow for all AP types when averaging Q65, and for navg > 9.
2020-12-30 12:10:03 -05:00
Joe Taylor
91687c573b
Fix the reporting of SNR for Q65 average decodes.
2020-12-30 11:02:49 -05:00
Joe Taylor
412422db17
Add 'q' to the Q65 end-of-line flags; label right text window for "Average decodes".
2020-12-30 10:42:27 -05:00
Joe Taylor
d81c01d23d
Remove unneeded arguments from calls to q65_avg and q65_avg2.
2020-12-30 09:07:41 -05:00
Joe Taylor
057967a761
For Q65 nsg averaging, wrap nsave when it reaches MAXAVE.
2020-12-30 08:44:56 -05:00
Joe Taylor
b6d2002985
Q65 decoder mostly working now with all (A B C D) decoding types.
2020-12-29 16:41:48 -05:00
Joe Taylor
520a0c7cc0
Work in progress for Q65 decoder.
2020-12-28 18:53:13 -05:00
Joe Taylor
62074ab58f
Much reworking of Q65 decoder. Have temporarily enabled all types of decoding passes.
2020-12-28 15:27:10 -05:00
Joe Taylor
30ab29d9e3
Work in progress, with lots of diagnostics. Do not use on the air!
2020-12-27 15:27:26 -05:00
Joe Taylor
48297e068b
More work in ptogress ...
2020-12-27 14:14:10 -05:00
Joe Taylor
d246a23948
Work in progress on message averaging: save current status.
2020-12-27 11:35:55 -05:00
Joe Taylor
5c805dfb39
another realignment of red sync curve and convention for f0.
2020-12-27 10:35:04 -05:00
Joe Taylor
c8ace441f9
New files for Q65 message averaging.
2020-12-26 10:08:53 -05:00
Joe Taylor
3d042ee56f
Work in progress, on Q65 message averaging.
2020-12-26 10:04:17 -05:00
Joe Taylor
d5957f51f9
Insert some (commented out) diagnostics.
2020-12-24 13:07:29 -05:00
Joe Taylor
171e466389
More work on Q65 message averaging.
2020-12-24 09:51:02 -05:00
Joe Taylor
844930fe75
Correct the frequency alignment of red sync curve.
2020-12-23 11:03:09 -05:00
Joe Taylor
c5a0de6210
Partial implementation of Q65 message averaging.
2020-12-23 09:47:11 -05:00
Joe Taylor
008cb37c16
Update test_q65 for having removed the T/F sync flag from q65sim command line.
2020-12-22 13:41:40 -05:00
Joe Taylor
408ac7bd0d
Correct the reported f0 for Q65 signals. It was off by one tone spacing.
2020-12-22 13:21:31 -05:00
Joe Taylor
cac6577127
Extend the DT range for 30 s Q65 submodes to include EME delays.
2020-12-22 09:43:25 -05:00
Joe Taylor
83c917ac57
Don't allow previous values of DT, f0 to be displayed with a no-decode.
2020-12-21 15:59:33 -05:00
Joe Taylor
044aa80dc4
Remove all vestiges of the QRA64 mode. It has been replaced by Q65.
2020-12-21 15:07:53 -05:00
Joe Taylor
36a089de21
Remove the sync-test option from q65sim.f90.
2020-12-21 13:42:03 -05:00
Joe Taylor
44516dbbc1
Make the Q65 red sync curve at least 21 tone-spacings wide, even if FTol is smaller.
2020-12-21 13:33:54 -05:00
Joe Taylor
545079e951
Reorder the ibw loop in q65_loops.f90.
2020-12-20 21:43:30 -05:00
Joe Taylor
ddf727f351
Adjust a 3 dB offset in Q65 SNRs from list decodes.
2020-12-20 21:42:42 -05:00
Joe Taylor
1f33c857ac
Measure fSpread from ccf1, then use resulting width to set effective ibwmin.
2020-12-19 13:25:51 -05:00
Joe Taylor
c7ca708569
Fix the problem with not honoring "Save Decoded" in Q65 mode.
2020-12-19 11:42:42 -05:00
Joe Taylor
f23129c33c
Fix a problem with Q65 FTol range extending down below 0 Hz.
2020-12-19 11:25:18 -05:00
Joe Taylor
7096a548ec
Correct a problem with estimating rms of ccf for Q65-300x submodes.
2020-12-19 10:42:27 -05:00
Joe Taylor
89ab3b0f01
Fix a bounds error with very small FTol.
2020-12-18 16:30:11 -05:00
