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17 lines
995 B
Fortran
17 lines
995 B
Fortran
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! WSPR4
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! LDPC(174,74)/CRC24 code, four 4x4 Costas arrays for sync, ramp-up and ramp-down symbols
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parameter (KK=50) !Information bits (50 + CRC24)
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parameter (ND=87) !Data symbols
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parameter (NS=16) !Sync symbols
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parameter (NN=NS+ND) !Sync and data symbols (103)
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parameter (NN2=NS+ND+2) !Total channel symbols (105)
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parameter (NSPS=13312) !Samples per symbol at 12000 S/s
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parameter (NZ=NSPS*NN) !Sync and Data samples (1,397,136)
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parameter (NZ2=NSPS*NN2) !Total samples in shaped waveform (1,397,760)
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parameter (NMAX=408*3456) !Samples in iwave (1,410,048)
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parameter (NFFT1=4*NSPS, NH1=NFFT1/2) !Length of FFTs for symbol spectra
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parameter (NSTEP=NSPS) !Coarse time-sync step size
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parameter (NHSYM=(NMAX-NFFT1)/NSTEP) !Number of symbol spectra (1/4-sym steps)
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parameter (NDOWN=32) !Downsample factor
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