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07edcb67e0
Fano decode. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@3270 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
41 lines
1.1 KiB
Fortran
41 lines
1.1 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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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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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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if(snrdb.lt.-99.0) return
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! Remove interleaving
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call interleave9(i1SoftSymbolsScrambled,-1,i1SoftSymbols)
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return
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end subroutine softsym
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