Steven Franke
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b0ef40cb1d
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Add routines for ft4slow based on (280,101) code.
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2020-05-02 08:10:35 -05:00 |
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Steven Franke
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e82edf2365
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Generalize ft4slowsim and ft4sd to work with arbitrary modulation index.
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2020-04-28 07:21:13 -05:00 |
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Steven Franke
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7804ab5fc6
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A simple hard-decision bit-flip decoder for LDPC codes.
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2020-04-26 14:44:02 -05:00 |
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Steven Franke
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73e2aa9573
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Add routines needed to test (240,101) qso mode.
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2020-04-26 14:34:09 -05:00 |
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Steven Franke
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c2bcb460e1
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Remove temporary (174,101) qsp stuff and revert to (174,74) with wspr-type messages.
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2020-04-26 14:30:24 -05:00 |
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Steven Franke
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a0f9ea0075
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Add a (240,101) code.
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2020-04-23 11:54:02 -05:00 |
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Steven Franke
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edeb756257
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Work on (174,101) encoding and decoding for ft4slow.
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2020-04-22 10:36:48 -05:00 |
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Steven Franke
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3085047a96
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Add routines to create wave files for ft4slow.
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2020-04-22 08:00:34 -05:00 |
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Steven Franke
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8da98fee1e
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Cleanup
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2020-04-21 15:02:57 -05:00 |
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Steven Franke
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01d555c898
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Add hybrid bp/osd decoder for (174,K) crc-aided code.
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2020-04-21 13:46:43 -05:00 |
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Steven Franke
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529cc1bae1
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Speed up wspr4d.
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2020-04-21 13:44:24 -05:00 |
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Steven Franke
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03efe4d54a
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Add shift jittering to improve performance on fading channels. Not yet optimized for speed.
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2020-04-20 08:37:58 -05:00 |
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Steven Franke
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14f6c27025
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wspr4d cleanup.
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2020-04-18 08:05:23 -05:00 |
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Steven Franke
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041d0bf1f4
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Fix bpdecode174_74.f90 to work with revised crc24 routine.
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2020-04-17 15:06:22 -05:00 |
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Steven Franke
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c2d60afcf9
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Make ldpcsim174_101 work.
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2020-04-17 14:37:48 -05:00 |
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Steven Franke
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fae81b6b67
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Add routines necessary to support a crc24-aided (174,101) code.
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2020-04-17 14:11:12 -05:00 |
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Steven Franke
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b670353bbd
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Cleanup and tweaks.
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2020-04-16 08:55:17 -05:00 |
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Steven Franke
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4978f29e58
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Add a new code.
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2020-04-15 15:45:50 -05:00 |
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Steven Franke
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b8ff0941e8
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Add wspr4d and support routines. Not yet working.
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2020-04-15 15:45:07 -05:00 |
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Steven Franke
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c54f3b7e83
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ldpcsim174_74: minor cleanup.
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2020-04-15 07:59:57 -05:00 |
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Steven Franke
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7d52234371
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Fix a bug in wspr4 signal generation.
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2020-04-15 07:58:31 -05:00 |
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Steven Franke
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c5e2593979
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Add routines necessary to generate simulated 'wspr4' wav files.
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2020-04-14 10:34:00 -05:00 |
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Joe Taylor
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e82b9ffa38
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Allow entry and decoding of WSPR-format message in ldpcsim174_74.
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2020-04-13 15:43:34 -04:00 |
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Steven Franke
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65fa6aed6c
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Add a new (174,74) LDPC code (regular, column weight 3) and supporting files.
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2020-04-13 10:23:02 -05:00 |
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Steven Franke
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e972fbbfec
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Change sync word to 4 concatenated 4x4 Costas arrays. Tweaks to optimize sync efficiency.
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2020-04-07 13:18:41 -05:00 |
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Steven Franke
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1044342245
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Use Joe's sync vector.
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2020-04-05 14:40:19 -05:00 |
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Steven Franke
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583f9d2f0e
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Comment out a debug write statement.
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2020-04-03 10:39:51 -05:00 |
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Steven Franke
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cf5a69d25b
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Updates and additions to wsprcpm files.
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2020-04-03 10:27:43 -05:00 |
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Steven Franke
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0f2793dcbe
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Update calls to bpdecode174_91.
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2020-03-17 12:18:10 -05:00 |
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Steven Franke
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cf07d478ac
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Some repairs and tweaks to development-related programs in fsk4hf directory.
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2020-02-09 16:13:52 -06:00 |
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Steven Franke
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e9160f3c2f
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Make ldpcsim174_91 work again. Scale SNR2500 assuming coherent BPSK, same Eb as FT8.
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2020-02-08 14:49:21 -06:00 |
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Steve Franke
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66e3f11fba
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Add ft4 files in lib/ft4.
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2019-01-25 16:01:34 -06:00 |
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Steve Franke
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3bdbf19d1d
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Make ft4sim and ft4d work.
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2019-01-22 11:01:28 -06:00 |
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Steve Franke
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b4639b77d0
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Fix CMakeLists.txt so that ft2_decode still builds. Fix a bug in ft4d - sync now seems to work.
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2019-01-21 19:52:13 -06:00 |
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Steve Franke
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f2dc394c84
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Add ft4 files; ft4sim works, ft4d is work in progress.
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2019-01-21 19:31:54 -06:00 |
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Steve Franke
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f447fe49e1
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Fix some indexing problems. Create subroutine ft2_gfsk_iwave.f90 for use with ft2.exe. Needs testing.
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2019-01-17 15:25:06 -06:00 |
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Steve Franke
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7701516b43
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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.
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2019-01-17 14:01:40 -06:00 |
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Bill Somerville
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074914d607
|
Fix merge issues
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2019-01-16 20:55:01 +00:00 |
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Steve Franke
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348e7c8ad5
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In principle, ft2d can now decode multiple signals. Not yet tested.
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2019-01-13 15:44:16 -06:00 |
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Steve Franke
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1fb89929a9
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Make ft2d slightly more robust. Still very rough.
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2019-01-13 10:58:35 -06:00 |
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Steve Franke
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cf1fe6c3d6
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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.
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2019-01-12 13:28:10 -06:00 |
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Steve Franke
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f63f0301eb
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Tweak some decoder parameters for better performance.
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2019-01-10 10:35:09 -06:00 |
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Steve Franke
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e0658f183f
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Add simulator (ft2sim.f90) and decoder (ft2d.f90) for experimental medium-fast mode.
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2019-01-10 10:20:31 -06:00 |
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Steve Franke
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87b97039b6
|
Remove a small bias in Watterson channel simulator channel amplitude.
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2018-10-25 16:39:17 -05:00 |
|
Steve Franke
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9657617cdc
|
Merge branch 'integrate-77bit' into develop
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2018-09-13 15:24:33 -05:00 |
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Steve Franke
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642540ff8f
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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.
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2018-09-12 15:06:26 -05:00 |
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Steve Franke
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629d061e30
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Move a couple of simulation files to fsk4hf, which will eventually be excluded from releases.
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2018-09-12 13:46:40 -05:00 |
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Steve Franke
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af7feaf65a
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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.
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2018-09-10 17:01:50 -05:00 |
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Steve Franke
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0c60db50d3
|
Experimental -o option for wsprd uses ordered-statistics decoder. Decodes are accepted only if the callsign exists in the hashtable.
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2018-09-09 20:30:23 -05:00 |
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Steve Franke
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fa1822bb4a
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Trying to re-implement osd for wspr.
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2018-09-08 16:50:15 -05:00 |
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