mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-02 00:23:57 -04:00
3430648727
As at ^/branches/wsjtx_exp@5271 git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@5272 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
107 lines
3.0 KiB
Fortran
107 lines
3.0 KiB
Fortran
subroutine jt65a(dd0,npts,newdat,nutc,nf1,nf2,nfqso,ntol,nsubmode, &
|
|
nagain,ndecoded)
|
|
|
|
! Process dd() data to find and decode JT65 signals.
|
|
|
|
parameter (NSZ=3413)
|
|
parameter (NZMAX=60*12000)
|
|
parameter (NFFT=8192)
|
|
real dd0(NZMAX)
|
|
real dd(NZMAX)
|
|
real*4 ss(322,NSZ)
|
|
real*4 savg(NSZ)
|
|
logical done(NSZ)
|
|
real a(5)
|
|
character decoded*22
|
|
common/decstats/num65,numbm,numkv,num9,numfano
|
|
save
|
|
|
|
dd=0.
|
|
tskip=2.0
|
|
nskip=12000*tskip
|
|
dd(1+nskip:npts+nskip)=dd0(1:npts)
|
|
npts=npts+nskip
|
|
|
|
if(newdat.ne.0) then
|
|
call timer('symsp65 ',0)
|
|
call symspec65(dd,npts,ss,nhsym,savg) !Get normalized symbol spectra
|
|
call timer('symsp65 ',1)
|
|
endif
|
|
|
|
df=12000.0/NFFT !df = 12000.0/16384 = 0.732 Hz
|
|
ftol=16.0 !Frequency tolerance (Hz)
|
|
mode65=2**nsubmode
|
|
done=.false.
|
|
freq0=-999.
|
|
|
|
do nqd=1,0,-1
|
|
if(nqd.eq.1) then !Quick decode, at fQSO
|
|
fa=nfqso - ntol
|
|
fb=nfqso + ntol
|
|
else !Wideband decode at all freqs
|
|
fa=nf1
|
|
fb=nf2
|
|
endif
|
|
ia=max(51,nint(fa/df))
|
|
ib=min(NSZ-51,nint(fb/df))
|
|
|
|
thresh0=1.5
|
|
|
|
do i=ia,ib !Search over freq range
|
|
freq=i*df
|
|
if(savg(i).lt.thresh0 .or. done(i)) cycle
|
|
|
|
call timer('ccf65 ',0)
|
|
call ccf65(ss(1,i),nhsym,savg(i),sync1,dt,flipk,syncshort,snr2,dt2)
|
|
call timer('ccf65 ',1)
|
|
|
|
ftest=abs(freq-freq0)
|
|
thresh1=1.0
|
|
if(nqd.eq.1 .and. ntol.le.100) thresh1=0.
|
|
if(sync1.lt.thresh1 .or. ftest.lt.ftol) cycle
|
|
|
|
nflip=nint(flipk)
|
|
call timer('decod65a',0)
|
|
call decode65a(dd,npts,newdat,nqd,freq,nflip,mode65,sync2,a,dt, &
|
|
nbmkv,nhist,decoded)
|
|
call timer('decod65a',1)
|
|
|
|
ftest=abs(freq+a(1)-freq0)
|
|
if(ftest.lt.ftol) cycle
|
|
|
|
if(decoded.ne.' ') then
|
|
ndecoded=1
|
|
nfreq=nint(freq+a(1))
|
|
ndrift=nint(2.0*a(2))
|
|
s2db=10.0*log10(sync2) - 32 !### empirical (was 40) ###
|
|
nsnr=nint(s2db)
|
|
if(nsnr.lt.-30) nsnr=-30
|
|
if(nsnr.gt.-1) nsnr=-1
|
|
dt=dt-tskip
|
|
if(nbmkv.eq.1) numbm=numbm+1
|
|
if(nbmkv.eq.2) numkv=numkv+1
|
|
|
|
! Serialize writes - see also decjt9.f90
|
|
|
|
!$omp critical(decode_results)
|
|
|
|
write(*,1010) nutc,nsnr,dt,nfreq,decoded
|
|
1010 format(i4.4,i4,f5.1,i5,1x,'#',1x,a22)
|
|
write(13,1012) nutc,nint(sync1),nsnr,dt,float(nfreq),ndrift, &
|
|
decoded,nbmkv
|
|
1012 format(i4.4,i4,i5,f6.1,f8.0,i4,3x,a22,' JT65',i4)
|
|
call flush(6)
|
|
call flush(13)
|
|
!$omp end critical(decode_results)
|
|
|
|
freq0=freq+a(1)
|
|
i2=min(NSZ,i+15) !### ??? ###
|
|
done(i:i2)=.true.
|
|
endif
|
|
enddo
|
|
if(nagain.eq.1) exit
|
|
enddo
|
|
|
|
return
|
|
end subroutine jt65a
|