WSJT-X/lib/fsk4hf/ft8_params.f90

11 lines
659 B
Fortran

! 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)