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5,728 Commits 5 Branches 98 Tags 208 MiB
e82b9ffa38
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219 Commits

Author SHA1 Message Date
Joe Taylor
e82b9ffa38 Allow entry and decoding of WSPR-format message in ldpcsim174_74. 2020-04-13 15:43:34 -04:00
Steven Franke
65fa6aed6c Add a new (174,74) LDPC code (regular, column weight 3) and supporting files. 2020-04-13 10:23:02 -05:00
Steven Franke
e972fbbfec Change sync word to 4 concatenated 4x4 Costas arrays. Tweaks to optimize sync efficiency. 2020-04-07 13:18:41 -05:00
Steven Franke
1044342245 Use Joe's sync vector. 2020-04-05 14:40:19 -05:00
Steven Franke
583f9d2f0e Comment out a debug write statement. 2020-04-03 10:39:51 -05:00
Steven Franke
cf5a69d25b Updates and additions to wsprcpm files. 2020-04-03 10:27:43 -05:00
Steven Franke
0f2793dcbe Update calls to bpdecode174_91. 2020-03-17 12:18:10 -05:00
Steven Franke
cf07d478ac Some repairs and tweaks to development-related programs in fsk4hf directory. 2020-02-09 16:13:52 -06:00
Steven Franke
e9160f3c2f Make ldpcsim174_91 work again. Scale SNR2500 assuming coherent BPSK, same Eb as FT8. 2020-02-08 14:49:21 -06:00
Steve Franke
66e3f11fba Add ft4 files in lib/ft4. 2019-01-25 16:01:34 -06:00
Steve Franke
3bdbf19d1d Make ft4sim and ft4d work. 2019-01-22 11:01:28 -06:00
Steve Franke
b4639b77d0 Fix CMakeLists.txt so that ft2_decode still builds. Fix a bug in ft4d - sync now seems to work. 2019-01-21 19:52:13 -06:00
Steve Franke
f2dc394c84 Add ft4 files; ft4sim works, ft4d is work in progress. 2019-01-21 19:31:54 -06:00
Steve Franke
f447fe49e1 Fix some indexing problems. Create subroutine ft2_gfsk_iwave.f90 for use with ft2.exe. Needs testing. 2019-01-17 15:25:06 -06:00
Steve Franke
7701516b43 ft2sim now creates a GFSK waveform with BT=1.0. It also adds raised cosine ramp up and down at the beginning and end of the transmission. 2019-01-17 14:01:40 -06:00
Bill Somerville
074914d607 Fix merge issues 2019-01-16 20:55:01 +00:00
Steve Franke
348e7c8ad5 In principle, ft2d can now decode multiple signals. Not yet tested. 2019-01-13 15:44:16 -06:00
Steve Franke
1fb89929a9 Make ft2d slightly more robust. Still very rough. 2019-01-13 10:58:35 -06:00
Steve Franke
cf1fe6c3d6 More work on FT2. New frame format is 16sync + 128codeword. Data chunk is assumed to be 2.5s long. A rudimentary sync routine is implemented which finds the single strongest signal. 2019-01-12 13:28:10 -06:00
Steve Franke
f63f0301eb Tweak some decoder parameters for better performance. 2019-01-10 10:35:09 -06:00
Steve Franke
e0658f183f Add simulator (ft2sim.f90) and decoder (ft2d.f90) for experimental medium-fast mode. 2019-01-10 10:20:31 -06:00
Steve Franke
87b97039b6 Remove a small bias in Watterson channel simulator channel amplitude. 2018-10-25 16:39:17 -05:00
Steve Franke
9657617cdc Merge branch 'integrate-77bit' into develop 2018-09-13 15:24:33 -05:00
Steve Franke
642540ff8f unpack77 now returns logical variable unpk77_success, which will be .false. if there is something obviously wrong with the message. Still to do: set the flag if the unpacked message contains CQ in an implausible place. 2018-09-12 15:06:26 -05:00
Steve Franke
629d061e30 Move a couple of simulation files to fsk4hf, which will eventually be excluded from releases. 2018-09-12 13:46:40 -05:00
Steve Franke
af7feaf65a No need to examine every entry in the hash table. Just calculate the hash of OSD-produced callsigns and see if they are in the table. Add OSD decoding to the deep setting for wspr decoding. 2018-09-10 17:01:50 -05:00
Steve Franke
0c60db50d3 Experimental -o option for wsprd uses ordered-statistics decoder. Decodes are accepted only if the callsign exists in the hashtable. 2018-09-09 20:30:23 -05:00
Steve Franke
fa1822bb4a Trying to re-implement osd for wspr. 2018-09-08 16:50:15 -05:00
Joe Taylor
14385611be Code cleanup related to "bcontest". Auto-seq now OK for new NA VHF Contest messages. 2018-07-11 10:13:42 -04:00
Joe Taylor
d95d2df5b6 Old-style "NA VHF Contest" mode removed from all Fortran routines. 2018-07-10 15:09:42 -04:00
Steve Franke
48b60eab71 Make two sync passes, one for each sync array. Label candidates with their type and decode accordingly. 2018-06-05 16:44:52 -05:00
Steve Franke
86a5ae6596 costasxcorr is a Gnu Octave script that calculates the cross correlation between Costas arrays. 2018-06-04 14:06:14 -05:00
Steve Franke
c4ee0a2b41 Replace all references to code a with references to code c. 2018-06-04 08:04:22 -05:00
Steve Franke
689711ff1f Add definitions for a new and improved (174,91) code - called code c 2018-06-04 08:04:22 -05:00
Steve Franke
01a380084d Changes to make it easier to test different codes. 2018-06-04 08:04:22 -05:00
Steve Franke
358081f280 Changes necessary to build ldpcsim174_91.f90. 2018-06-04 08:04:22 -05:00
Steve Franke
87f5510999 ldpcsim174_91 now works 2018-06-04 08:04:22 -05:00
Steve Franke
84c153f9a9 Really add the new encoder and decoders. 2018-06-04 08:04:22 -05:00
Steve Franke
7a228d8f7d Starting to implement a (174,91) code. 2018-06-04 08:04:22 -05:00
Steve Franke
aeee9b62bb Hack CMakeLists.txt so that repo will build. 
Modify CMakeLists.txt so that wspr5sim, wspr5d build.
 2018-06-04 08:04:22 -05:00
Steven Franke
75111eef66 Bring some simulation tools up to date. 
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8664 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2018-05-18 15:04:15 +00:00
Joe Taylor
70768618b8 Correct typo in a comment. 
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8663 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2018-05-17 18:32:11 +00:00
Steven Franke
8149fe24be More work on block detection for dpsk. 
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8644 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2018-04-28 22:18:19 +00:00
Steven Franke
cfcec4d02f Add a rudimentary decoder for dpsk test mode. Hardwired sync only so far. 
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8637 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2018-04-24 16:37:29 +00:00
Steven Franke
bd0d414365 More work on a simulator for dpsk with root-raised-cosine pulses. 
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8632 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2018-04-22 19:51:31 +00:00
Steven Franke
92a45a68c6 More work on dpsk simulator. 
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8611 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2018-04-13 00:26:47 +00:00
Steven Franke
8772a101dc Add some development routines. 
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8604 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2018-04-08 17:07:08 +00:00
Steven Franke
1f9d73963b Update wsprcpm simulator and decoder. 
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8603 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2018-04-03 14:55:55 +00:00
Steven Franke
67a41a9f1d Add some simulation tools for binary cpm with sequence detection. 
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8586 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2018-03-22 14:21:39 +00:00
Steven Franke
2786c20ba2 Add support for a rate 1/3 (204,68) code. 
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8585 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2018-03-22 14:20:07 +00:00