mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-19 18:42:06 -05:00
5e459fe07a
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@2655 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
60 lines
1.5 KiB
Fortran
60 lines
1.5 KiB
Fortran
subroutine sync9(ss,tstep,f0a,df3,ntol,nfqso,sync,fpk,ccfred)
|
|
|
|
parameter (NSMAX=22000) !Max length of saved spectra
|
|
real ss(184,NSMAX)
|
|
real ccfred(NSMAX)
|
|
|
|
integer ii0(16)
|
|
integer ii(16) !Locations of sync half-symbols
|
|
data ii/1,11,21,31,41,51,61,77,89,101,113,125,137,149,161,169/
|
|
integer isync(85) !Sync vector for half-symbols
|
|
data isync/ &
|
|
1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1,0,0,0,0, &
|
|
1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,1,0, &
|
|
0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0, &
|
|
0,0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0, &
|
|
1,0,0,0,1/
|
|
|
|
ia=1
|
|
ib=min(1000,nint(1000.0/df3))
|
|
|
|
if(ntol.lt.1000) then
|
|
ia=nint((nfqso-1000-ntol)/df3)
|
|
ib=nint((nfqso-1000+ntol)/df3)
|
|
if(ia.lt.1) ia=1
|
|
if(ib.gt.NSMAX) ib=NSMAX
|
|
endif
|
|
print*,ia,ib,df3*ia+1000,df3*ib+1000
|
|
|
|
sbest=0.
|
|
lagmax=2.5/tstep + 0.9999
|
|
ccfred=0.
|
|
|
|
do i=ia,ib
|
|
smax=0.
|
|
do lag=-lagmax,lagmax
|
|
sum=0.
|
|
do j=1,16
|
|
k=ii(j) + lag
|
|
if(k.ge.1) sum=sum + ss(k,i)
|
|
enddo
|
|
if(sum.gt.smax) then
|
|
smax=sum
|
|
ipk=i
|
|
lagpk=lag
|
|
endif
|
|
enddo
|
|
if(smax.gt.sbest) then
|
|
sbest=smax
|
|
ipkbest=ipk
|
|
lagpkbest=lagpk
|
|
endif
|
|
ccfred(i)=smax
|
|
enddo
|
|
|
|
fpk=f0a + (ipkbest-1)*df3
|
|
sync=sbest
|
|
|
|
return
|
|
end subroutine sync9
|