WSJT-X/lib/softsym.f90
Joe Taylor 9ba06408b2 Temporary code, to aid with a series of tests of the JT9 decoder.
This commit will serve as a benchmark for comparison with new code to
be written.


git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@3266 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
2013-05-14 14:29:01 +00:00

40 lines
1016 B
Fortran

subroutine softsym(c0,npts8,nsps8,newdat,fpk,syncpk,snrdb,xdt,freq,drift, &
i1SoftSymbols)
! Compute the soft symbols
complex c0(0:npts8-1)
complex c2(0:4096-1)
complex c3(0:4096-1)
complex c5(0:4096-1)
real a(3)
integer*1 i1SoftSymbolsScrambled(207)
integer*1 i1SoftSymbols(207)
include 'jt9sync.f90'
nspsd=16
ndown=nsps8/nspsd
! Mix, low-pass filter, and downsample to 16 samples per symbol
call downsam9(c0,npts8,nsps8,newdat,nspsd,fpk,c2,nz2)
call peakdt9(c2,nz2,nsps8,nspsd,c3,nz3,xdt) !Find DT
fsample=1500.0/ndown
a=0.
call afc9(c3,nz3,fsample,a,syncpk) !Find deltaF, fDot, fDDot
call twkfreq(c3,c5,nz3,fsample,a) !Correct for deltaF, fDot, fDDot
! Compute soft symbols (in scrambled order)
call symspec2(c5,nz3,nsps8,nspsd,fsample,snrdb,i1SoftSymbolsScrambled)
! Remove interleaving
call interleave9(i1SoftSymbolsScrambled,-1,i1SoftSymbols)
freq=fpk - a(1)
drift=-2.0*a(2)
return
end subroutine softsym