mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-01 16:13:57 -04:00
6b6700321a
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6963 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
197 lines
4.4 KiB
Fortran
197 lines
4.4 KiB
Fortran
subroutine detectmsk32(cbig,n,mycall,hiscall,lines,nmessages,nutc,ntol,t00)
|
|
use timer_module, only: timer
|
|
|
|
parameter (NSPM=192, NPTS=3*NSPM, MAXSTEPS=7500, NFFT=3*NSPM, MAXCAND=5,NWIN=15*NSPM)
|
|
character*4 rpt(0:63)
|
|
character*6 mycall,hiscall
|
|
character*6 mycall0,hiscall0
|
|
character*22 msg,msgsent,msgreceived,allmessages(32)
|
|
character*80 lines(100)
|
|
complex cbig(n)
|
|
! complex cdat(0:NWIN-1)
|
|
complex cdat(0:n-1)
|
|
complex ctmp(NPTS)
|
|
! complex c(0:NWIN-1)
|
|
complex c(0:n-1)
|
|
complex cmsg(0:NSPM-1,0:63)
|
|
complex z
|
|
integer iloc(1)
|
|
integer ipk0(1)
|
|
integer indices(MAXSTEPS)
|
|
integer itone(144)
|
|
logical ismask(NFFT)
|
|
real a(3)
|
|
real detmet(-2:MAXSTEPS+3)
|
|
real detfer(MAXSTEPS)
|
|
real ferrs(MAXCAND)
|
|
real f2(64)
|
|
real peak(64)
|
|
real pp(12)
|
|
real p0(0:NSPM-1)
|
|
real p(0:NSPM-1)
|
|
real rcw(12)
|
|
real snrs(MAXCAND)
|
|
real s0(0:63)
|
|
real times(MAXCAND)
|
|
real tonespec(NFFT)
|
|
real*8 dt, df, fs, pi, twopi
|
|
logical first
|
|
equivalence (ipk0,ipk)
|
|
data first/.true./
|
|
save df,first,cb,cbr,fs,nhashes,pi,twopi,dt,rcw,pp,nmatchedfilter,cmsg,rpt,mycall0,hiscall0
|
|
|
|
if(first) then
|
|
nmatchedfilter=1
|
|
! define half-sine pulse and raised-cosine edge window
|
|
pi=4d0*datan(1d0)
|
|
twopi=8d0*datan(1d0)
|
|
fs=12000.0
|
|
dt=1.0/fs
|
|
df=fs/NFFT
|
|
|
|
do i=1,12
|
|
angle=(i-1)*pi/12.0
|
|
pp(i)=sin(angle)
|
|
rcw(i)=(1-cos(angle))/2
|
|
enddo
|
|
|
|
do i=0,30
|
|
if( i.lt.5 ) then
|
|
write(rpt(i),'(a1,i2.2,a1)') '-',abs(i-5)
|
|
write(rpt(i+31),'(a2,i2.2,a1)') 'R-',abs(i-5)
|
|
else
|
|
write(rpt(i),'(a1,i2.2,a1)') '+',i-5
|
|
write(rpt(i+31),'(a2,i2.2,a1)') 'R+',i-5
|
|
endif
|
|
enddo
|
|
rpt(62)='RRR '
|
|
rpt(63)='73 '
|
|
|
|
mycall0=' '
|
|
hiscall0=' '
|
|
first=.false.
|
|
endif
|
|
|
|
if(mycall .ne. mycall0 .or. hiscall .ne. hiscall0 ) then
|
|
freq=1500.0
|
|
nsym=32
|
|
dphi0=twopi*(freq-500)/12000.0
|
|
dphi1=twopi*(freq+500)/12000.0
|
|
do i=0,63
|
|
msg='<'//trim(mycall)//' '//trim(hiscall)//'> '//rpt(i)
|
|
call genmsk32(msg,msgsent,0,itone,itype)
|
|
phi=0.0
|
|
indx=0
|
|
nreps=1
|
|
do jrep=1,nreps
|
|
do isym=1,nsym
|
|
if( itone(isym) .eq. 0 ) then
|
|
dphi=dphi0
|
|
else
|
|
dphi=dphi1
|
|
endif
|
|
do j=1,6
|
|
cmsg(indx,i)=cmplx(cos(phi),sin(phi));
|
|
indx=indx+1
|
|
phi=mod(phi+dphi,twopi)
|
|
enddo
|
|
enddo
|
|
enddo
|
|
enddo
|
|
mycall0=mycall
|
|
hiscall0=hiscall
|
|
endif
|
|
|
|
cdat(0:n-1)=cbig
|
|
sbest=0.0
|
|
ibest=-1
|
|
do imsg=0,63
|
|
do idf=0,0
|
|
if( idf.eq.0 ) then
|
|
delf=0.0
|
|
else if( mod(idf,2).eq.1 ) then
|
|
delf=10*(idf+1)/2
|
|
else
|
|
delf=-10*idf/2
|
|
endif
|
|
a(1)=-delf
|
|
a(2:3)=0.
|
|
call twkfreq(cdat,c,n,12000.0,a)
|
|
smax=0.
|
|
p=0.
|
|
fac=1.0/192
|
|
do j=0,n-NSPM-1,2
|
|
z=fac*dot_product(c(j:j+NSPM-1),cmsg(0:NSPM-1,imsg))
|
|
s=real(z)**2 + aimag(z)**2
|
|
k=mod(j,NSPM)
|
|
p(k)=p(k)+s
|
|
if( s.gt.smax) then
|
|
smax=s
|
|
jpk=j
|
|
if( smax.gt.sbest) then
|
|
sbest=smax
|
|
p0=p
|
|
ibest=imsg
|
|
f0=1500+delf
|
|
endif
|
|
endif
|
|
enddo ! time loop
|
|
s0(imsg)=smax
|
|
enddo ! frequency loop
|
|
enddo ! message loop
|
|
|
|
ipk0=maxloc(p0)
|
|
ps=0.
|
|
sq=0.
|
|
ns=0
|
|
pmax=0.
|
|
do i=0,NSPM-1,2
|
|
j=ipk-i
|
|
if(j.gt.96) j=j-192
|
|
if(j.lt.-96) j=j+192
|
|
if(abs(j).gt.4) then
|
|
ps=ps+p0(i)
|
|
sq=sq+p0(i)**2
|
|
ns=ns+1
|
|
endif
|
|
enddo
|
|
avep=ps/ns
|
|
rmsp=sqrt(sq/ns-avep*avep)
|
|
p0=(p0-avep)/rmsp
|
|
p1=maxval(p0)
|
|
|
|
! do i=0,NSPM-1,2
|
|
! write(14,1030) i,i/12000.0,p0(i)
|
|
!1030 format(i5,f10.6,f10.3)
|
|
! enddo
|
|
|
|
ave=(sum(s0)-sbest)/63
|
|
s0=s0-ave
|
|
s1=sbest-ave
|
|
s2=0.
|
|
do i=0,63
|
|
if(i.ne.ibest .and. s0(i).gt.s2) s2=s0(i)
|
|
! write(15,1020) i,idf,jpk/12000.0,s0(i)
|
|
!1020 format(2i6,2f10.2)
|
|
enddo
|
|
|
|
r1=s1/s2
|
|
r2=r1+p1
|
|
msg=" "
|
|
! write(*,'(i6.6,3f7.1,i5,2x,a22)') nutc,r1,p1,r2,ibest
|
|
nmessages=0
|
|
lines=char(0)
|
|
if(r2.gt.7.0) then
|
|
t0=0.0
|
|
nsnr=0.0
|
|
msgreceived=' '
|
|
nrxrpt=iand(ibest,63)
|
|
nmessages=1
|
|
write(msgreceived,'(a1,a,1x,a,a1,1x,a4)') "<",trim(mycall), &
|
|
trim(hiscall),">",rpt(nrxrpt)
|
|
write(lines(nmessages),1021) nutc,nsnr,t0,nint(f0),msgreceived
|
|
1021 format(i6.6,i4,f5.1,i5,' & ',a22)
|
|
endif
|
|
return
|
|
end subroutine detectmsk32
|