2019-01-27 00:03:54 -05:00
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! FT4
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! LDPC (174,91) code
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2019-01-21 20:31:54 -05:00
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2019-01-27 00:03:54 -05:00
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parameter (KK=91) !Information bits (77 + CRC14)
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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) !Total channel symbols (103)
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parameter (NSPS=512) !Samples per symbol at 12000 S/s
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parameter (NZ=NSPS*NN) !Samples in full 4.395 s message frame (52736)
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parameter (NMAX=5.0*12000) !Samples in iwave (60,000)
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parameter (NFFT1=2048, NH1=NFFT1/2) !Length of FFTs for symbol spectra
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2019-01-25 17:01:34 -05:00
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parameter (NSTEP=NSPS/4) !Coarse time-sync step size
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2019-01-21 20:31:54 -05:00
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parameter (NHSYM=NMAX/NSTEP-3) !Number of symbol spectra (1/4-sym steps)
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parameter (NDOWN=16) !Downsample factor
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