mirror of https://github.com/saitohirga/WSJT-X.git
197 lines
4.4 KiB
Fortran
197 lines
4.4 KiB
Fortran
subroutine detectmsk32(cbig,n,mycall,hiscall,lines,nmessages,nutc,ntol,t00)
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use timer_module, only: timer
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parameter (NSPM=192, NPTS=3*NSPM, MAXSTEPS=7500, NFFT=3*NSPM, MAXCAND=5,NWIN=15*NSPM)
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character*4 rpt(0:63)
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character*6 mycall,hiscall
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character*6 mycall0,hiscall0
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character*22 msg,msgsent,msgreceived,allmessages(32)
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character*80 lines(100)
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complex cbig(n)
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! complex cdat(0:NWIN-1)
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complex cdat(0:n-1)
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complex ctmp(NPTS)
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! complex c(0:NWIN-1)
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complex c(0:n-1)
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complex cmsg(0:NSPM-1,0:63)
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complex z
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integer iloc(1)
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integer ipk0(1)
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integer indices(MAXSTEPS)
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integer itone(144)
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logical ismask(NFFT)
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real a(3)
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real detmet(-2:MAXSTEPS+3)
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real detfer(MAXSTEPS)
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real ferrs(MAXCAND)
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real f2(64)
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real peak(64)
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real pp(12)
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real p0(0:NSPM-1)
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real p(0:NSPM-1)
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real rcw(12)
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real snrs(MAXCAND)
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real s0(0:63)
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real times(MAXCAND)
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real tonespec(NFFT)
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real*8 dt, df, fs, pi, twopi
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logical first
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equivalence (ipk0,ipk)
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data first/.true./
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save df,first,cb,cbr,fs,nhashes,pi,twopi,dt,rcw,pp,nmatchedfilter,cmsg,rpt,mycall0,hiscall0
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if(first) then
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nmatchedfilter=1
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! define half-sine pulse and raised-cosine edge window
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pi=4d0*datan(1d0)
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twopi=8d0*datan(1d0)
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fs=12000.0
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dt=1.0/fs
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df=fs/NFFT
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do i=1,12
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angle=(i-1)*pi/12.0
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pp(i)=sin(angle)
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rcw(i)=(1-cos(angle))/2
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enddo
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do i=0,30
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if( i.lt.5 ) then
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write(rpt(i),'(a1,i2.2,a1)') '-',abs(i-5)
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write(rpt(i+31),'(a2,i2.2,a1)') 'R-',abs(i-5)
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else
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write(rpt(i),'(a1,i2.2,a1)') '+',i-5
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write(rpt(i+31),'(a2,i2.2,a1)') 'R+',i-5
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endif
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enddo
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rpt(62)='RRR '
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rpt(63)='73 '
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mycall0=' '
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hiscall0=' '
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first=.false.
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endif
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if(mycall .ne. mycall0 .or. hiscall .ne. hiscall0 ) then
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freq=1500.0
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nsym=32
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dphi0=twopi*(freq-500)/12000.0
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dphi1=twopi*(freq+500)/12000.0
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do i=0,63
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msg='<'//trim(mycall)//' '//trim(hiscall)//'> '//rpt(i)
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call genmsk32(msg,msgsent,0,itone,itype)
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phi=0.0
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indx=0
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nreps=1
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do jrep=1,nreps
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do isym=1,nsym
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if( itone(isym) .eq. 0 ) then
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dphi=dphi0
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else
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dphi=dphi1
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endif
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do j=1,6
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cmsg(indx,i)=cmplx(cos(phi),sin(phi));
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indx=indx+1
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phi=mod(phi+dphi,twopi)
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enddo
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enddo
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enddo
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enddo
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mycall0=mycall
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hiscall0=hiscall
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endif
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cdat(0:n-1)=cbig
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sbest=0.0
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ibest=-1
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do imsg=0,63
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do idf=0,0
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if( idf.eq.0 ) then
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delf=0.0
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else if( mod(idf,2).eq.1 ) then
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delf=10*(idf+1)/2
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else
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delf=-10*idf/2
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endif
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a(1)=-delf
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a(2:3)=0.
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call twkfreq(cdat,c,n,12000.0,a)
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smax=0.
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p=0.
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fac=1.0/192
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do j=0,n-NSPM-1,2
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z=fac*dot_product(c(j:j+NSPM-1),cmsg(0:NSPM-1,imsg))
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s=real(z)**2 + aimag(z)**2
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k=mod(j,NSPM)
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p(k)=p(k)+s
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if( s.gt.smax) then
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smax=s
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jpk=j
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if( smax.gt.sbest) then
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sbest=smax
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p0=p
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ibest=imsg
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f0=1500+delf
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endif
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endif
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enddo ! time loop
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s0(imsg)=smax
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enddo ! frequency loop
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enddo ! message loop
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ipk0=maxloc(p0)
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ps=0.
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sq=0.
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ns=0
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pmax=0.
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do i=0,NSPM-1,2
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j=ipk-i
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if(j.gt.96) j=j-192
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if(j.lt.-96) j=j+192
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if(abs(j).gt.4) then
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ps=ps+p0(i)
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sq=sq+p0(i)**2
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ns=ns+1
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endif
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enddo
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avep=ps/ns
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rmsp=sqrt(sq/ns-avep*avep)
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p0=(p0-avep)/rmsp
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p1=maxval(p0)
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! do i=0,NSPM-1,2
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! write(14,1030) i,i/12000.0,p0(i)
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!1030 format(i5,f10.6,f10.3)
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! enddo
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ave=(sum(s0)-sbest)/63
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s0=s0-ave
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s1=sbest-ave
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s2=0.
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do i=0,63
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if(i.ne.ibest .and. s0(i).gt.s2) s2=s0(i)
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! write(15,1020) i,idf,jpk/12000.0,s0(i)
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!1020 format(2i6,2f10.2)
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enddo
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r1=s1/s2
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r2=r1+p1
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msg=" "
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! write(*,'(i6.6,3f7.1,i5,2x,a22)') nutc,r1,p1,r2,ibest
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nmessages=0
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lines=char(0)
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if(r2.gt.7.0) then
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t0=0.0
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nsnr=0.0
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msgreceived=' '
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nrxrpt=iand(ibest,63)
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nmessages=1
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write(msgreceived,'(a1,a,1x,a,a1,1x,a4)') "<",trim(mycall), &
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trim(hiscall),">",rpt(nrxrpt)
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write(lines(nmessages),1021) nutc,nsnr,t0,nint(f0),msgreceived
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1021 format(i6.6,i4,f5.1,i5,' & ',a22)
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endif
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return
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end subroutine detectmsk32
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