mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-09-17 10:46:33 -04:00
a9623703b3
changes on the C++ side. Basically works except that Tx audio has incorrect DT and audio is truncated at the end. Also, command line decoding using JT9 is not as sensitive as decoding from within WSJT-X.
17 lines
945 B
Fortran
17 lines
945 B
Fortran
! FT4
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! LDPC(174,91) code, four 4x4 Costas arrays for Sync
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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) !Sync and data symbols (103)
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parameter (NN2=NS+ND+2) !Total channel symbols (105)
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parameter (NSPS=576) !Samples per symbol at 12000 S/s
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parameter (NZ=NSPS*NN) !Sync and Data samples (59328)
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parameter (NZ2=NSPS*NN2) !Total samples in shaped waveform (60480)
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parameter (NMAX=21*3456) !Samples in iwave (72576)
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parameter (NFFT1=2304, 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=18) !Downsample factor
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