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WSJT-X
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2437 Commits

Author SHA1 Message Date
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
Bill Somerville ac6a6d0cd7
Fail wsprd if data directory specified not accessible 
Also fixed trivial memory leak on error exit.
 2020-12-03 13:12:12 +00:00
Bill Somerville 3134dd8a60
Removed incorrect pointer declaration, tnx to Rud, K5RUD 2020-12-03 12:20:14 +00:00
Bill Somerville de0af5a2ed
Merge branch 'feat-outgoing-udp-interface' into develop 2020-11-10 20:09:48 +00:00
Steven Franke e0888eb70c Restore wsprsimf and dependencies. 2020-11-06 09:33:44 -06:00
Bill Somerville 1a223f5c45
Remove unwanted file and directory 2020-11-03 20:29:25 +00:00
Bill Somerville 731fe53a1e
Reasonable default values for NB setting for command line jt9 
Use the -X command option to set  single decode mode and to set the NB
level.

    -X 256*(n+3)+s

Where s=32  selects single decode mode,  and 'n' is the  equivalent NB
setting as used in the WSJT-X UI.  Default for both is zero in FST4(W)
mode if no -X option is passed. E.g. -X 544 selects single decode with
NB=-1 (256*(-1+3)+32).
 2020-10-26 20:20:52 +00:00
Bill Somerville 5efe448a9c
Cosmetic change 2020-10-23 03:32:22 +01:00
Bill Somerville 308d815fb5
Add --freq-tolerance (-F) jt9 option 2020-10-23 03:24:19 +01:00
Bill Somerville 90b3fa2a46
Merge branch 'release-2.3.0' into develop 2020-10-13 16:51:40 +01:00
Bill Somerville 6026944e33
Workaround for some memory issues, possibly thread stack sizing 
Reduced maximum thread team size for MSK144 candidate discovery to 4.
 2020-10-07 13:12:20 +01:00
Bill Somerville ead587ee55
Fix up out of date common block sizing 2020-10-04 22:52:51 +01:00
Bill Somerville 203e0da5d6
Fix up out of date common block sizing 2020-10-04 00:45:56 +01:00
Joe Taylor 9200c3e27a Add NB = -3% option to cycle through NB=0, 1, 2, 3, ... 20%. 2020-09-30 13:32:03 -04:00
Joe Taylor 0ab3e5116f Fix several flaws in the loop-over-NB logic in the FST4 decoder. 2020-09-19 10:08:42 -04:00
Joe Taylor 2af01ebaa1 Fix a flaw in the loop-over NB logic. There are more flaws! 2020-09-18 15:52:33 -04:00
Joe Taylor f0ed93cdd0 In the NB-loop, don't cycle around a decode attempt for the npct=0 pass. 2020-09-18 11:45:28 -04:00
Joe Taylor 52bdd57e57 Implement NB=-1%, NB=-2%. Fix a startup problem with WideGraps's fMax value. 2020-09-18 11:30:23 -04:00
Joe Taylor 375a869a51 Revert "Revert "Very basic code (including some diagnostics) for "try all NB settings". Will remove it again."" 
This reverts commit 033cc65d08.
 2020-09-18 09:01:51 -04:00
Joe Taylor 033cc65d08 Revert "Very basic code (including some diagnostics) for "try all NB settings". Will remove it again." 
This reverts commit bcf7f36b9c.
 2020-09-17 19:30:07 -04:00
Joe Taylor bcf7f36b9c Very basic code (including some diagnostics) for "try all NB settings". Will remove it again. 2020-09-17 19:28:55 -04:00
Steven Franke 7d58df4cc1 In FST4 mode with Single Decode not checked, move candidates within 20 Hz of nfqso to the top of the list. 2020-09-17 14:22:38 -05:00
Joe Taylor 21dc6a5c59 Connect the FLow and FHigh limits for FST4 decoding. 2020-09-16 17:23:59 -04:00
Steven Franke 221ede2903 Remove some unused variables. 2020-09-14 13:07:07 -05:00
Steven Franke b49a90f530 Remove a redundant array. 2020-09-14 13:03:33 -05:00
Steven Franke 1b59d9dc8c Eliminate redundancies from the calculation of sequence correlations. 2020-09-14 12:42:32 -05:00
Steven Franke ca0804450b Remove some redundant code. 2020-09-14 09:07:45 -05:00
Steven Franke 3d8c8e3dd7 Merge branch 'develop' of bitbucket.org:k1jt/wsjtx into develop 2020-09-14 09:00:35 -05:00
Steven Franke 98d52e35ac Speed up FST4 decoding. 2020-09-14 09:00:30 -05:00
Joe Taylor a1baaebee9 Decoder should reject data with rms < 3.0 over first 15 seconds. 2020-09-12 13:46:09 -04:00
Joe Taylor 263675cac4 Fix an oddball result with i*2 numbers: abs(-32768)=-32768. 2020-09-12 09:00:39 -04:00
Steven Franke 71fdcd1119 Silence a compiler warning. 2020-09-10 16:11:07 -05:00
Steven Franke 2dcde590df Use widegraph limits for noise baseline fit. Limit signal search to within the widegraph limits. 2020-09-10 14:58:10 -05:00
Joe Taylor 47fcddcb50 Send nfa, nfb to fst4_decode(). 2020-09-10 14:59:52 -04:00
Joe Taylor 01a1688b32 FST4 and FST4W decoder: get freq range from nfqso and ntol; remove BCD submodes, i.e. hmod=2, 4, 8. 2020-09-05 13:14:40 -04:00
Joe Taylor f24d15b16e Eliminate the FST4/FST4W submodes with hmod > 1. 2020-09-04 15:15:30 -04:00
K9AN f066936043
Remove an unused variable from fst4_decode 2020-08-29 19:55:23 +01:00
Steven Franke 5ca81a6507
Use 3rd order polynomial fit to estimate the noise baseline. The 
polynomial fit is done over 400 Hz bandwidth for T/R periods longer
than 15s, and over approx. 600 Hz (10 times the signal bandwidth) for
T/R period of 15s.
 2020-08-29 19:55:23 +01:00
Steven Franke d82b9f5b0e
Speed up decoder by eliminating some complex multiples in sequence detection loop. Add timer calls for doppler spread calculation and sequence detection loop. 2020-08-29 19:55:22 +01:00
Steven Franke ecaca6af9f
Fix argument list in call to fet_fst4_bitmetrics.f90 2020-08-29 19:55:22 +01:00
Steven Franke b9328b96c9
Tweaks to update the diagnostics that are written to fort.21. 2020-08-29 19:55:22 +01:00
Steven Franke e02850ae5a
Streamline fst4_decode. Add timer for downsampling. 2020-08-29 19:55:22 +01:00
Steven Franke 782c779392
Reconfigure to optimize decoder for MF/LF (high coherence) channels. 2020-08-29 19:55:21 +01:00
Steven Franke 7cb5511ed0
Simplify some code in fst4_decode.f90 - no functional change. 2020-08-29 19:55:21 +01:00
Steven Franke bf06193c10
Add timer call for bit metric calculation. Improve some comments. Make fort.21 ntype parameter more informative. 2020-08-29 19:54:38 +01:00