WSJT-X/lib/fsk4hf/ft8_params.f90

! LDPC (174,87) code
parameter (KK=87)                     !Information bits (75 + CRC12)
parameter (ND=58)                     !Data symbols
parameter (NS=21)                     !Sync symbols (3 @ Costas 7x7)
parameter (NN=NS+ND)                  !Total channel symbols (79)
parameter (NSPS=2048)                 !Samples per symbol at 12000 S/s
parameter (NZ=NSPS*NN)                !Samples in full 15 s waveform (161,792)
parameter (NMAX=15*12000)             !Samples in iwave (180,000)
parameter (NFFT1=2*NSPS, NH1=NFFT1/2) !Length of FFTs for symbol spectra
parameter (NHSYM=2*NMAX/NH1-1)        !Number of symbol spectra (1/2-symbol steps)
First bare-bones decoder for FT8. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7716 ab8295b8-cf94-4d9e-aec4-7959e3be5d79 2017-06-14 20:21:01 +00:00			`! LDPC (174,87) code`
			`parameter (KK=87) !Information bits (75 + CRC12)`
			`parameter (ND=58) !Data symbols`
Some test routines. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7712 ab8295b8-cf94-4d9e-aec4-7959e3be5d79 2017-06-13 19:42:45 +00:00			`parameter (NS=21) !Sync symbols (3 @ Costas 7x7)`
Various tweaks to test routines. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7720 ab8295b8-cf94-4d9e-aec4-7959e3be5d79 2017-06-15 14:58:59 +00:00			`parameter (NN=NS+ND) !Total channel symbols (79)`
Some test routines. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7712 ab8295b8-cf94-4d9e-aec4-7959e3be5d79 2017-06-13 19:42:45 +00:00			`parameter (NSPS=2048) !Samples per symbol at 12000 S/s`
First bare-bones decoder for FT8. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7716 ab8295b8-cf94-4d9e-aec4-7959e3be5d79 2017-06-14 20:21:01 +00:00			`parameter (NZ=NSPS*NN) !Samples in full 15 s waveform (161,792)`
Some test routines. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7712 ab8295b8-cf94-4d9e-aec4-7959e3be5d79 2017-06-13 19:42:45 +00:00			`parameter (NMAX=15*12000) !Samples in iwave (180,000)`
First bare-bones decoder for FT8. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7716 ab8295b8-cf94-4d9e-aec4-7959e3be5d79 2017-06-14 20:21:01 +00:00			`parameter (NFFT1=2*NSPS, NH1=NFFT1/2) !Length of FFTs for symbol spectra`
Use complex signal for fine sync and symbol demod. Lower sync threshold. Improved SNR estimate. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7757 ab8295b8-cf94-4d9e-aec4-7959e3be5d79 2017-07-01 13:08:30 +00:00			`parameter (NHSYM=2*NMAX/NH1-1) !Number of symbol spectra (1/2-symbol steps)`