2019-01-27 00:03:54 -05:00
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! FT4
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2019-01-30 12:22:41 -05:00
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! LDPC(174,91) code, four 4x4 Costas arrays for Sync
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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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2019-01-30 12:22:41 -05:00
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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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2019-01-27 00:03:54 -05:00
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parameter (NSPS=512) !Samples per symbol at 12000 S/s
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2019-01-30 12:22:41 -05:00
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parameter (NZ=NSPS*NN) !Sync and Data samples (52736)
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parameter (NZ2=NSPS*NN2) !Total samples in shaped waveform (53760)
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2019-04-18 15:16:39 -04:00
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parameter (NMAX=18*3456) !Samples in iwave
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2019-01-27 00:03:54 -05:00
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parameter (NFFT1=2048, NH1=NFFT1/2) !Length of FFTs for symbol spectra
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2019-02-02 17:29:17 -05:00
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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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2019-01-21 20:31:54 -05:00
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parameter (NDOWN=16) !Downsample factor
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