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Merge branch 'release-2.1.0' of bitbucket.org:k1jt/wsjtx into release-2.1.0

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Joe Taylor 2019-03-28 13:21:02 -04:00
commit 67b9f327a5
2 changed files with 24 additions and 15 deletions
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2
lib/ft4/ft4d.f90
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@ -11,7 +11,7 @@ program ft4d
character*4 cqstr
real*8 fMHz
integer ihdr(11)
integer*2 iwave(180000) !15*12000
integer*2 iwave(240000) !20*12000
fs=12000.0/NDOWN !Sample rate
dt=1/fs !Sample interval after downsample (s)

37
lib/ft4/getcandidates4.f90
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@ -27,7 +27,7 @@ subroutine getcandidates4(id,fa,fb,syncmin,nfqso,maxcand,savg,candidate, &
! Compute symbol spectra, stepping by NSTEP steps.
savg=0.
tstep=NSTEP/12000.0
df=12000.0/NFFT1 !5.86 Hz
df=12000.0/NFFT1
fac=1.0/300.0
do j=1,NHSYM
ia=(j-1)*NSTEP + 1
@ -55,22 +55,31 @@ subroutine getcandidates4(id,fa,fb,syncmin,nfqso,maxcand,savg,candidate, &
indx=0
call indexx(savsm(n300:n2500),np,indx)
xn=savsm(nfa+indx(nint(0.3*np)))
savsm=savsm/xn
ncand=0
if(xn.le.1.e-8) return
savsm=savsm/xn
! call ft4_baseline(savg,nfa,nfb,sbase)
! savsm=savsm/sbase
f_offset = -1.5*12000/512
do i=nfa+1,nfb-1
if(savsm(i).ge.savsm(i-1) .and. savsm(i).ge.savsm(i+1) .and. savsm(i).ge.syncmin) then
! del=0.5*(savsm(i-1)-savsm(i+1))/(savsm(i-1)-2*savsm(i)+savsm(i+1))
del=0.
fpeak=(i+del)*df+f_offset
speak=savsm(i) - 0.25*(savsm(i-1)-savsm(i+1))*del
ncand=ncand+1
candidate(1,ncand)=fpeak
candidate(2,ncand)=-99.99
candidate(3,ncand)=speak
if(ncand.eq.maxcand) exit
endif
if(savsm(i).ge.savsm(i-1) .and. savsm(i).ge.savsm(i+1) .and. &
savsm(i).ge.syncmin) then
den=savsm(i-1)-2*savsm(i)+savsm(i+1)
del=0.
if(den.ne.0.0) del=0.5*(savsm(i-1)-savsm(i+1))/den
fpeak=(i+del)*df+f_offset
speak=savsm(i) - 0.25*(savsm(i-1)-savsm(i+1))*del
ncand=ncand+1
if(ncand.gt.maxcand) then
ncand=maxcand
exit
endif
candidate(1,ncand)=fpeak
candidate(2,ncand)=-99.99
candidate(3,ncand)=speak
if(ncand.eq.maxcand) exit
endif
enddo
return