mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-17 17:42:02 -05:00
102 lines
2.3 KiB
Fortran
102 lines
2.3 KiB
Fortran
subroutine msk144sync(cdat,nframes,ntol,delf,navmask,npeaks,fc,fest, &
|
|
npklocs,nsuccess,xmax,c)
|
|
|
|
!$ use omp_lib
|
|
|
|
parameter (NSPM=864)
|
|
complex cdat(NSPM*nframes)
|
|
complex cdat2(NSPM*nframes,8)
|
|
complex c(NSPM) !Coherently averaged complex data
|
|
complex cs(NSPM,8)
|
|
complex cb(42) !Complex waveform for sync word
|
|
|
|
integer s8(8)
|
|
integer iloc(1)
|
|
integer npklocs(npeaks)
|
|
integer navmask(nframes) ! defines which frames to average
|
|
|
|
real cbi(42),cbq(42)
|
|
real pkamps(npeaks)
|
|
real xcc(0:NSPM-1)
|
|
real xccs(0:NSPM-1,8)
|
|
real xm(8)
|
|
real bf(8)
|
|
real pp(12) !Half-sine pulse shape
|
|
logical first
|
|
data first/.true./
|
|
data s8/0,1,1,1,0,0,1,0/
|
|
save first,cb,fs,pi,twopi,dt,s8,pp
|
|
|
|
if(first) then
|
|
pi=4.0*atan(1.0)
|
|
twopi=8.0*atan(1.0)
|
|
fs=12000.0
|
|
dt=1.0/fs
|
|
|
|
do i=1,12 !Define half-sine pulse
|
|
angle=(i-1)*pi/12.0
|
|
pp(i)=sin(angle)
|
|
enddo
|
|
|
|
! Define the sync word waveforms
|
|
s8=2*s8-1
|
|
cbq(1:6)=pp(7:12)*s8(1)
|
|
cbq(7:18)=pp*s8(3)
|
|
cbq(19:30)=pp*s8(5)
|
|
cbq(31:42)=pp*s8(7)
|
|
cbi(1:12)=pp*s8(2)
|
|
cbi(13:24)=pp*s8(4)
|
|
cbi(25:36)=pp*s8(6)
|
|
cbi(37:42)=pp(1:6)*s8(8)
|
|
cb=cmplx(cbi,cbq)
|
|
|
|
first=.false.
|
|
endif
|
|
|
|
nfreqs=2*nint(ntol/delf) + 1
|
|
xm=0.0
|
|
bf=0.0
|
|
nthreads=1
|
|
!$ nthreads=min(4,int(OMP_GET_MAX_THREADS(),4))
|
|
nstep=nfreqs/nthreads
|
|
|
|
!$OMP PARALLEL NUM_THREADS(nthreads) PRIVATE(id,if1,if2)
|
|
id=1
|
|
!$ id=OMP_GET_THREAD_NUM() + 1 !Thread id = 1,2,...
|
|
if1=-nint(ntol/delf) + (id-1)*nstep
|
|
if2=if1+nstep-1
|
|
if(id.eq.nthreads) if2=nint(ntol/delf)
|
|
call msk144_freq_search(cdat,fc,if1,if2,delf,nframes,navmask,cb, &
|
|
cdat2(1,id),xm(id),bf(id),cs(1,id),xccs(1,id))
|
|
!$OMP END PARALLEL
|
|
|
|
xmax=xm(1)
|
|
fest=fc+bf(1)
|
|
c=cs(1:NSPM,1)
|
|
xcc=xccs(0:NSPM-1,1)
|
|
if(nthreads.gt.1) then
|
|
do i=2,nthreads
|
|
if(xm(i).gt.xmax) then
|
|
xmax=xm(i)
|
|
fest=fc+bf(i)
|
|
c=cs(1:NSPM,i)
|
|
xcc=xccs(0:NSPM-1,i)
|
|
endif
|
|
enddo
|
|
endif
|
|
|
|
! Find npeaks largest peaks
|
|
do ipk=1,npeaks
|
|
iloc=maxloc(xcc)
|
|
ic2=iloc(1)
|
|
npklocs(ipk)=ic2
|
|
pkamps(ipk)=xcc(ic2-1)
|
|
xcc(max(0,ic2-7):min(NSPM-1,ic2+7))=0.0
|
|
enddo
|
|
|
|
nsuccess=0
|
|
if(xmax.ge.1.3) nsuccess=1
|
|
|
|
return
|
|
end subroutine msk144sync
|