Joe Taylor
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0adcfc667f
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Add files for source encoding and decoding of 77-bit messages.
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2018-06-26 08:33:13 -04:00 |
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Steve Franke
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7684bd0e78
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Work toward a generalized sequence detector for nsymbols=1, 2, or 3. Works for nsymbol=3, but not yet for nsymbol=1, or 2.
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2018-06-25 17:01:34 -05:00 |
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Joe Taylor
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bd5aec3f31
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More tweaks to description of 77-bit message types.
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2018-06-23 15:15:10 -04:00 |
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Joe Taylor
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539ec3d465
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test
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2018-06-23 12:15:47 -04:00 |
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Joe Taylor
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35b53766cb
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Add info on 28-bit integers used for standard callsigns.
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2018-06-23 11:54:40 -04:00 |
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Joe Taylor
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7266d407ff
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Amended rules for 77-bit message types.
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2018-06-22 16:36:14 -04:00 |
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Steve Franke
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0f5759270e
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Added 2-symbol sequence detection for proof-of-concept tests.
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2018-06-22 11:20:28 -05:00 |
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Joe Taylor
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2edcebef40
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Further progress toward defining the 77-bit message types.
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2018-06-21 15:38:08 -04:00 |
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Joe Taylor
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96f3fa5810
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Add directory 77bit and its contents.
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2018-06-21 10:51:19 -04:00 |
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Joe Taylor
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2e947f4f2b
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Add files in .../lib/77bit.
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2018-06-21 10:50:03 -04:00 |
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Joe Taylor
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f8bb7f4477
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Implement a valid scheme for computing S/N in JT4 mode.
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2018-06-18 13:41:26 -04:00 |
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Steve Franke
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3f8c218ebe
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Make changes to ft8b_2.f90 to accommodate the new 77-bit in/out encoding/decoding routines. With these changes, WSJT-X decodes (174,91) frames.
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2018-06-17 12:11:32 -05:00 |
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Steve Franke
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1a31e5b2d6
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For (174,91) code, move CRC generation and testing into encode and decode routines. Make ldpcsim174_91.f90 work with the new encode/decode routines.
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2018-06-17 08:44:10 -05:00 |
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Steve Franke
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2cdb164446
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Move CRC13 creation into encode128_90.f90 and CRC checking into bpdecode128_90.f90.
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2018-06-16 16:42:02 -05:00 |
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Steve Franke
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e16e78790a
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Create chkcrc13a.f90. Should chkcrc12a, chkcrc13a, and chkcrc14a be combined into one routine?
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2018-06-16 09:04:51 -05:00 |
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Steve Franke
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c18338b83b
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Fix the calculation of symbol error probability.
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2018-06-16 09:03:32 -05:00 |
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Joe Taylor
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e588836997
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Add a description of the "Spec nn%" spinner on Wide Graph.
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2018-06-15 13:22:04 -04:00 |
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Steve Franke
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6846964170
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Add 'code b' - a better (128,90) code. Code b has irregular column weights - 80% weight 3 and 20% weight 4.
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2018-06-14 15:38:58 -05:00 |
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Joe Taylor
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e6f6dc9717
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Add to manual: must enable VHF features to use NA VHF Contest mode.
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2018-06-14 13:40:40 -04:00 |
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Joe Taylor
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b887919d3e
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Update .gitignore
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2018-06-14 11:32:20 -04:00 |
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Joe Taylor
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67b5c80e1a
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Update the contest ideas.
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2018-06-14 11:31:16 -04:00 |
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Steve Franke
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1aeaa1715b
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Fix up ldpcsim144 for comparisons with ldpcsim128_90.
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2018-06-14 09:59:49 -05:00 |
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Steve Franke
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5da3986f0a
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More work on (128,90) code. ldpcsim128_90 works now.
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2018-06-14 09:30:41 -05:00 |
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Joe Taylor
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0344c14f99
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Add the white paper digi-contest.txt.
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2018-06-14 10:14:30 -04:00 |
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Joe Taylor
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3705693dbd
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Add 50.323 and 144.174 as FT8 frequencies.
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2018-06-14 09:17:56 -04:00 |
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Joe Taylor
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1bf9f22760
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Deactivate the "not_GA" warning message at startup.
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2018-06-13 15:37:42 -04:00 |
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Steve Franke
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3ac119fb99
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Progress toward a working ldpc128_90 simulator. Compiles, but does not yet work.
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2018-06-13 11:34:00 -05:00 |
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Steve Franke
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41920af89a
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Add routines that will implement 77-bit messages for MSK144. Initial tests will use a (128,90) code.
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2018-06-13 09:40:04 -05:00 |
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Steve Franke
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9b63fe6ac7
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Fix a bug in ldpcsim144 so that nerrhisto.dat is calculated and printed.
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2018-06-12 16:00:06 -05:00 |
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Steve Franke
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a5837bd5c7
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AP decoding now works for type 2 frames. Also cleaned up and simplified AP implementation in ft8b_2.
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2018-06-11 15:10:44 -05:00 |
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Bill Somerville
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7ac0afc60b
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Docs for boost subtree maintenance
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2018-06-09 22:31:46 +01:00 |
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Bill Somerville
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5abe797e3c
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Merge commit '4ebe6417a5fce5f0994fc0c31bebf732be96a07c' as 'boost'
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2018-06-09 21:48:33 +01:00 |
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Bill Somerville
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4ebe6417a5
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Squashed 'boost/' content from commit b4feb19f2
git-subtree-dir: boost
git-subtree-split: b4feb19f287ee92d87a9624b5d36b7cf46aeadeb
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2018-06-09 21:48:32 +01:00 |
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Bill Somerville
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b5eabc6d6a
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Remove original svn vendor branch imported boost subtree in prep for git-subtree solution
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2018-06-09 21:47:03 +01:00 |
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Steve Franke
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6fe9e8f860
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Remove the need to re-order the parity-check matrix columns for compatibility with the generator matrix. Redefine the codeword to have the form [91 message bits|83 parity bits].
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2018-06-09 13:05:11 -05:00 |
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Steve Franke
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b03acdfce3
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Define a custom button labeled *Discard Measured* to replace the standard *Discard* button. This is being done to ensure that the button label is the same on different platforms. Update the documentation to reference the new Button name.
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2018-06-08 17:39:57 -05:00 |
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Steve Franke
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68beed88a7
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Change to Gray bit to symbol mapping for (174,91) messages.
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2018-06-08 16:21:21 -05:00 |
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Steve Franke
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a3d9cf8bcd
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Fix a bug that could cause all log-likelihoods to be NaN in some cases.
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2018-06-07 14:24:35 -05:00 |
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Steve Franke
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a0db6a8a08
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Disable AP passes for type 2 frames, for now. Write some diagnostics to lun 81.
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2018-06-07 11:40:25 -05:00 |
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Steve Franke
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b84602d059
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Zero the apsymbols for type 2 frames, for now.
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2018-06-06 11:28:44 -05:00 |
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Steve Franke
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a23e2b6f8b
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Fix a bug that caused some second-decoding-attempt log-likelihoods to become NaN.
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2018-06-06 11:21:00 -05:00 |
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Steve Franke
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badc639777
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Fix a bug in sync8d.f90. Switching between Costas arrays should work now.
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2018-06-06 10:59:49 -05:00 |
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Steve Franke
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48b60eab71
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Make two sync passes, one for each sync array. Label candidates with their type and decode accordingly.
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2018-06-05 16:44:52 -05:00 |
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Steve Franke
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772b1bd5fa
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ft8sim can now generate old (174,87) or new (174,91) frames. Frame type is selected using the itype command line parameter.
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2018-06-05 08:40:00 -05:00 |
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Steve Franke
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86a5ae6596
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costasxcorr is a Gnu Octave script that calculates the cross correlation between Costas arrays.
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2018-06-04 14:06:14 -05:00 |
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Steve Franke
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c4ee0a2b41
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Replace all references to code a with references to code c.
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2018-06-04 08:04:22 -05:00 |
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Steve Franke
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689711ff1f
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Add definitions for a new and improved (174,91) code - called code c
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2018-06-04 08:04:22 -05:00 |
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Steve Franke
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01a380084d
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Changes to make it easier to test different codes.
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2018-06-04 08:04:22 -05:00 |
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Steve Franke
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358081f280
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Changes necessary to build ldpcsim174_91.f90.
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2018-06-04 08:04:22 -05:00 |
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Steve Franke
|
87f5510999
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ldpcsim174_91 now works
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2018-06-04 08:04:22 -05:00 |
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