mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-05 00:41:19 -05:00
15 lines
813 B
Fortran
15 lines
813 B
Fortran
! FT4 37.5 baud - 26.67 ms symbol duration
|
|
! LDPC (128,90) code
|
|
|
|
parameter (KK=90) !Information bits (77 + CRC13)
|
|
parameter (ND=64) !Data symbols
|
|
parameter (NS=12) !Sync symbols (12)
|
|
parameter (NN=NS+ND) !Total channel symbols (76)
|
|
parameter (NSPS=320) !Samples per symbol at 12000 S/s
|
|
parameter (NZ=NSPS*NN) !Samples in full 1.92 s waveform (23040)
|
|
parameter (NMAX=2.5*12000) !Samples in iwave (36,000)
|
|
parameter (NFFT1=640, NH1=NFFT1/2) !Length of FFTs for symbol spectra
|
|
parameter (NSTEP=NSPS/4) !Rough time-sync step size
|
|
parameter (NHSYM=NMAX/NSTEP-3) !Number of symbol spectra (1/4-sym steps)
|
|
parameter (NDOWN=16) !Downsample factor
|