mirror of https://github.com/saitohirga/WSJT-X.git
50 lines
1.2 KiB
Fortran
50 lines
1.2 KiB
Fortran
subroutine softsym(c0,npts8,nsps8,newdat,fpk,syncpk,snrdb,xdt,freq,drift, &
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schk,i1SoftSymbols)
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! Compute the soft symbols
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complex c0(0:npts8-1)
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complex c2(0:4096-1)
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complex c3(0:4096-1)
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complex c5(0:4096-1)
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real a(3)
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integer*1 i1SoftSymbolsScrambled(207)
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integer*1 i1SoftSymbols(207)
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include 'jt9sync.f90'
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data freq0/-999.0/,drift0/-999.0/
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save freq0,drift0
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nspsd=16
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ndown=nsps8/nspsd
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! Mix, low-pass filter, and downsample to 16 samples per symbol
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call downsam9(c0,npts8,nsps8,newdat,nspsd,fpk,c2,nz2)
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call peakdt9(c2,nz2,nsps8,nspsd,c3,nz3,xdt) !Find DT
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fsample=1500.0/ndown
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a=0.
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call afc9(c3,nz3,fsample,a,syncpk) !Find deltaF, fDot, fDDot
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freq=fpk - a(1)
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drift=-2.0*a(2)
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if(abs(freq-freq0).lt.0.1 .and. abs(drift-drift0).lt.0.1) then
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schk=0.
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go to 999
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endif
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freq0=freq
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drift0=drift
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newdat=0
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call twkfreq(c3,c5,nz3,fsample,a) !Correct for deltaF, fDot, fDDot
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! Compute soft symbols (in scrambled order)
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call symspec2(c5,nz3,nsps8,nspsd,fsample,freq,drift,snrdb,schk, &
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i1SoftSymbolsScrambled)
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! Remove interleaving
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call interleave9(i1SoftSymbolsScrambled,-1,i1SoftSymbols)
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999 return
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end subroutine softsym
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