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6,631 Commits 6 Branches 107 Tags
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249 Commits

Author SHA1 Message Date
Steven Franke
390884268c Wholesale change from FST280 to FST240 2020-06-27 08:53:11 -05:00
Bill Somerville
451b6747b7
Spring cleaning 2020-06-03 15:27:49 +01:00
Steven Franke
3405687e89 Clean up in preparation for RC release. 2020-05-05 13:45:02 -05:00
Steven Franke
9b6dd092c5 Streamline decoding to use a single call to decode174_91. 2020-05-05 11:59:43 -05:00
Steven Franke
27b94e2cc7 Fix another bug. 2020-05-05 08:07:31 -05:00
Steven Franke
82e66f3251 Fix problems with ldpc174_91.f90 2020-05-05 08:05:58 -05:00
Steven Franke
093c403063 Implement coupled BP->OSD decoding for FT8/FT4. 2020-05-04 13:13:49 -05:00
Steven Franke
c3ba4178e6 Tweak the downsample filter bandwidth. 2020-05-04 13:09:05 -05:00
Steven Franke
b0ef40cb1d Add routines for ft4slow based on (280,101) code. 2020-05-02 08:10:35 -05:00
Steven Franke
e82edf2365 Generalize ft4slowsim and ft4sd to work with arbitrary modulation index. 2020-04-28 07:21:13 -05:00
Steven Franke
7804ab5fc6 A simple hard-decision bit-flip decoder for LDPC codes. 2020-04-26 14:44:02 -05:00
Steven Franke
73e2aa9573 Add routines needed to test (240,101) qso mode. 2020-04-26 14:34:09 -05:00
Steven Franke
c2bcb460e1 Remove temporary (174,101) qsp stuff and revert to (174,74) with wspr-type messages. 2020-04-26 14:30:24 -05:00
Steven Franke
a0f9ea0075 Add a (240,101) code. 2020-04-23 11:54:02 -05:00
Steven Franke
edeb756257 Work on (174,101) encoding and decoding for ft4slow. 2020-04-22 10:36:48 -05:00
Steven Franke
3085047a96 Add routines to create wave files for ft4slow. 2020-04-22 08:00:34 -05:00
Steven Franke
8da98fee1e Cleanup 2020-04-21 15:02:57 -05:00
Steven Franke
01d555c898 Add hybrid bp/osd decoder for (174,K) crc-aided code. 2020-04-21 13:46:43 -05:00
Steven Franke
529cc1bae1 Speed up wspr4d. 2020-04-21 13:44:24 -05:00
Steven Franke
03efe4d54a Add shift jittering to improve performance on fading channels. Not yet optimized for speed. 2020-04-20 08:37:58 -05:00
Steven Franke
14f6c27025 wspr4d cleanup. 2020-04-18 08:05:23 -05:00
Steven Franke
041d0bf1f4 Fix bpdecode174_74.f90 to work with revised crc24 routine. 2020-04-17 15:06:22 -05:00
Steven Franke
c2d60afcf9 Make ldpcsim174_101 work. 2020-04-17 14:37:48 -05:00
Steven Franke
fae81b6b67 Add routines necessary to support a crc24-aided (174,101) code. 2020-04-17 14:11:12 -05:00
Steven Franke
b670353bbd Cleanup and tweaks. 2020-04-16 08:55:17 -05:00
Steven Franke
4978f29e58 Add a new code. 2020-04-15 15:45:50 -05:00
Steven Franke
b8ff0941e8 Add wspr4d and support routines. Not yet working. 2020-04-15 15:45:07 -05:00
Steven Franke
c54f3b7e83 ldpcsim174_74: minor cleanup. 2020-04-15 07:59:57 -05:00
Steven Franke
7d52234371 Fix a bug in wspr4 signal generation. 2020-04-15 07:58:31 -05:00
Steven Franke
c5e2593979 Add routines necessary to generate simulated 'wspr4' wav files. 2020-04-14 10:34:00 -05:00
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