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(8,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