37 lines
2.8 KiB
Fortran
37 lines
2.8 KiB
Fortran
!parameter (NSPS=480) !Samples per symbol at 12000 S/s
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!parameter (NTXDUR=5) !TX Duration in Seconds
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!parameter (NDOWNSPS=16) !Downsampled samples per symbol
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!parameter (AZ=6.0) !Near dupe sync spacing
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!parameter (NDD=136) !Downconverted FFT Bins - 100 Bins
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!parameter (JZ=62) !Sync Search Space over +/- 2.5s relative to 0.5s TX start time. 2.48 = 62/4/(12000/1920) ?
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parameter (NSPS=384, NTXDUR=4, NDOWNSPS=12, NDD=125, JZ=250) ! 250 Hz 31.25 baud 60 wpm -18.0dB (1.0Eb/N0) 2.52s
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! parameter (NSPS=384, NTXDUR=5, NDOWNSPS=12, NDD=125, JZ=116) ! 250 Hz 31.25 baud 48 wpm -18.0dB (1.0Eb/N0) 2.52s
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! parameter (NSPS=480, NTXDUR=5, NDOWNSPS=12, NDD=125, JZ=116) ! 200 Hz 25 baud 48 wpm -19.0dB (1.0Eb/N0) 3.16s
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! parameter (NSPS=480, NTXDUR=6, NDOWNSPS=20, NDD=150, JZ=116) ! 200 Hz 25 baud 40 wpm -19.0dB (1.0Eb/N0) 3.16s
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! parameter (NSPS=500, NTXDUR=6, NDOWNSPS=20, NDD=144, JZ=116) ! 192 Hz 24 baud 40 wpm -19.4dB (1.0Eb/N0) 3.29s
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! parameter (NSPS=600, NTXDUR=6, NDOWNSPS=24, NDD=120, JZ=172) ! 160 Hz 20 baud 40 wpm -20.0dB (1.0Eb/N0) 3.95s
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! parameter (NSPS=768, NTXDUR=8, NDOWNSPS=24, NDD=125, JZ=116) ! 125 Hz 15.625 baud 32 wpm -21.0dB (1.0Eb/N0) 5.05s
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! parameter (NSPS=800, NTXDUR=8, NDOWNSPS=24, NDD=100, JZ=116) ! 120 Hz 15 baud 32 wpm -21.2dB (1.0Eb/N0) 5.26s
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! parameter (NSPS=960, NTXDUR=8, NDOWNSPS=24, NDD=100, JZ=116) ! 100 Hz 12.50 baud 32 wpm -22.0dB (1.0Eb/N0) 5.92s
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! parameter (NSPS=1200, NTXDUR=10, NDOWNSPS=20, NDD=100, JZ=116) ! 80 Hz 10 baud 24 wpm -23.0dB (1.0Eb/N0) 7.90s
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! parameter (NSPS=1920, NTXDUR=15, NDOWNSPS=32, NDD=100, JZ=116) ! 50 Hz 6.250 baud 16 wpm -25.0dB (1.0Eb/N0) 12.64s
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! parameter (NSPS=4000, NTXDUR=30, NDOWNSPS=40, NDD=90, JZ=116) ! 24 Hz 3 baud 8 wpm -28.2dB (1.0Eb/N0) 26.33s
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parameter (AZ=12000.0/(1.0*NSPS)*0.8d0) !Dedupe overlap in Hz
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parameter (ASTART=0.1) !Start delay in seconds
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parameter (ASYNCMIN=1.5) !Minimum Sync
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parameter (KK=87) !Information bits (75 + CRC12)
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parameter (ND=58) !Data symbols
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parameter (NS=21) !Sync symbols (3 @ Costas 7x7)
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parameter (NN=NS+ND) !Total channel symbols (79)
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parameter (NZ=NSPS*NN) !Samples in full 15 s waveform (151,680)
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parameter (NMAX=NTXDUR*12000) !Samples in iwave (180,000)
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parameter (NFFT1=2*NSPS, NH1=NFFT1/2) !Length of FFTs for symbol spectra
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parameter (NSTEP=NSPS/4) !Rough time-sync step size
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parameter (NHSYM=NMAX/NSTEP-3) !Number of symbol spectra (1/4-sym steps)
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parameter (NDOWN=NSPS/NDOWNSPS) !Downsample factor to 32 samples per symbol
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parameter (NQSYMBOL=NDOWNSPS/4) !Downsample factor of a quarter symbol
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