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Allow up to 500 pre-candidates.

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This commit is contained in:
Steven Franke 2020-03-09 14:03:53 -05:00
parent d57b84be27
commit cf5aab0088
1 changed files with 15 additions and 9 deletions
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24
lib/ft8/sync8.f90
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@ -2,6 +2,7 @@ subroutine sync8(dd,nfa,nfb,syncmin,nfqso,maxcand,s,candidate, &
ncand,sbase)
include 'ft8_params.f90'
parameter (MAXPRECAND=500)
! Search over +/- 2.5s relative to 0.5s TX start time.
parameter (JZ=62)
complex cx(0:NH1)
@ -11,7 +12,7 @@ subroutine sync8(dd,nfa,nfb,syncmin,nfqso,maxcand,s,candidate, &
real x(NFFT1)
real sync2d(NH1,-JZ:JZ)
real red(NH1)
real candidate0(3,maxcand)
real candidate0(3,MAXPRECAND)
real candidate(3,maxcand)
real dd(NMAX)
integer jpeak(NH1)
@ -100,9 +101,9 @@ subroutine sync8(dd,nfa,nfb,syncmin,nfqso,maxcand,s,candidate, &
base=red(ibase)
red=red/base
do i=1,min(maxcand,iz)
do i=1,min(MAXPRECAND,iz)
n=ia + indx(iz+1-i) - 1
if(red(n).lt.syncmin.or.isnan(red(n)).or.k.eq.maxcand) exit
if(red(n).lt.syncmin.or.isnan(red(n)).or.k.eq.MAXPRECAND) exit
k=k+1
candidate0(1,k)=n*df
candidate0(2,k)=(jpeak(n)-0.5)*tstep
@ -110,9 +111,8 @@ subroutine sync8(dd,nfa,nfb,syncmin,nfqso,maxcand,s,candidate, &
enddo
ncand=k
! Put nfqso at top of list, and save only the best of near-dupe freqs.
! Save only the best of near-dupe freqs.
do i=1,ncand
if(abs(candidate0(1,i)-nfqso).lt.10.0) candidate0(1,i)=-candidate0(1,i)
if(i.ge.2) then
do j=1,i-1
fdiff=abs(candidate0(1,i))-abs(candidate0(1,j))
@ -123,22 +123,28 @@ subroutine sync8(dd,nfa,nfb,syncmin,nfqso,maxcand,s,candidate, &
enddo
endif
enddo
fac=20.0/maxval(s)
s=fac*s
! Sort by sync
call indexx(candidate0(3,1:ncand),ncand,indx)
! Sort by frequency
! call indexx(candidate0(1,1:ncand),ncand,indx)
! Place candidates within 10 Hz of nfqso at the top of the list
k=1
do i=1,ncand
if( abs( candidate0(1,i)-nfqso ).le.10.0 .and. candidate0(3,i).ge.syncmin ) then
candidate(1:3,k)=candidate0(1:3,i)
candidate0(3,i)=0.0
k=k+1
endif
enddo
do i=ncand,1,-1
! do i=1,ncand
j=indx(i)
if( candidate0(3,j) .ge. syncmin ) then
candidate(2:3,k)=candidate0(2:3,j)
candidate(1,k)=abs(candidate0(1,j))
k=k+1
if(k.gt.maxcand) exit
endif
enddo
ncand=k-1