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https://github.com/saitohirga/WSJT-X.git
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c0c7e5d563
Note to testers: see lines 100-105 in jt65a.f90. If you want to experiment with some of these parameters, one way is to uncomment lines 148-151 and look at output in "fort.79" after a decoding run. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6282 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
164 lines
5.1 KiB
Fortran
164 lines
5.1 KiB
Fortran
subroutine jt65a(dd0,npts,newdat,nutc,nf1,nf2,nfqso,ntol,nsubmode, &
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minsync,nagain,n2pass,nrobust,ntrials,naggressive,ndepth, &
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nexp_decode,ndecoded)
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! Process dd0() data to find and decode JT65 signals.
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parameter (NSZ=3413,NZMAX=60*12000)
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parameter (NFFT=1000)
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real dd0(NZMAX)
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real dd(NZMAX)
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real ss(322,NSZ)
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real savg(NSZ)
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real a(5)
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character*22 decoded,decoded0
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type candidate
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real freq
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real dt
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real sync
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end type candidate
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type(candidate) ca(300)
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type decode
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real freq
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real dt
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real sync
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character*22 decoded
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end type decode
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type(decode) dec(50)
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common/decstats/ntry65a,ntry65b,n65a,n65b,num9,numfano
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common/steve/thresh0
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common/test000/ncandidates,nhard_min,nsoft_min,nera_best,nsofter_min, &
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ntotal_min,ntry,nq1000,ntot !### TEST ONLY ###
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save
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dd=dd0
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ndecoded=0
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do ipass=1,n2pass ! 2-pass decoding loop
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newdat=1
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if(ipass.eq.1) then !first-pass parameters
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thresh0=2.5
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nsubtract=1
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elseif( ipass.eq.2 ) then !second-pass parameters
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thresh0=2.5
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nsubtract=0
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endif
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if(n2pass.lt.2) nsubtract=0
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! if(newdat.ne.0) then
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call timer('symsp65 ',0)
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ss=0.
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call symspec65(dd,npts,ss,nhsym,savg) !Get normalized symbol spectra
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call timer('symsp65 ',1)
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! endif
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nfa=nf1
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nfb=nf2
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! nfa=max(200,nfqso-ntol)
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! nfb=min(4000,nfqso+ntol)
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! nrobust = 0: use float ccf. Only if ncand>50 fall back to robust (1-bit) ccf
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! nrobust = 1: use only robust (1-bit) ccf
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ncand=0
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if(nrobust.eq.0) then
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call timer('sync65 ',0)
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call sync65(ss,nfa,nfb,nhsym,ca,ncand,0)
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call timer('sync65 ',1)
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endif
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if(ncand.gt.50) nrobust=1
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if(nrobust.eq.1) then
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ncand=0
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call timer('sync65 ',0)
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call sync65(ss,nfa,nfb,nhsym,ca,ncand,1)
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call timer('sync65 ',1)
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endif
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call fqso_first(nfqso,ntol,ca,ncand)
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nvec=ntrials
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if(ncand.gt.75) then
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! write(*,*) 'Pass ',ipass,' ncandidates too large ',ncand
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nvec=100
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endif
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df=12000.0/NFFT !df = 12000.0/8192 = 1.465 Hz
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mode65=2**nsubmode
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nflip=1 !### temporary ###
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nqd=0
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decoded0=""
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freq0=0.
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do icand=1,ncand
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freq=ca(icand)%freq
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dtx=ca(icand)%dt
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sync1=ca(icand)%sync
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if(ipass.eq.1) ntry65a=ntry65a + 1
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if(ipass.eq.2) ntry65b=ntry65b + 1
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call timer('decod65a',0)
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call decode65a(dd,npts,newdat,nqd,freq,nflip,mode65,nvec, &
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naggressive,ndepth,nexp_decode,sync2,a,dtx,nft,qual,nhist,decoded)
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call timer('decod65a',1)
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!### Suppress false decodes in crowded HF bands ###
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if(naggressive.eq.0 .and. ntrials.le.10000) then
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if(ntry.eq.ntrials .or. ncandidates.eq.100) then
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if(nhard_min.ge.42 .or. ntotal_min.ge.71) cycle
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endif
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endif
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if(decoded.eq.decoded0 .and. abs(freq-freq0).lt. 3.0 .and. &
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minsync.ge.0) cycle !Don't display dupes
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if(decoded.ne.' ' .or. minsync.lt.0) then
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if( nsubtract .eq. 1 ) then
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call timer('subtr65 ',0)
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call subtract65(dd,npts,freq,dtx)
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call timer('subtr65 ',1)
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endif
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nfreq=nint(freq+a(1))
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ndrift=nint(2.0*a(2))
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s2db=10.0*log10(sync2) - 35 !### empirical ###
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nsnr=nint(s2db)
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if(nsnr.lt.-30) nsnr=-30
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if(nsnr.gt.-1) nsnr=-1
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! Serialize writes - see also decjt9.f90
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!$omp critical(decode_results)
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ndupe=0 ! de-dedupe
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do i=1, ndecoded
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if(decoded==dec(i)%decoded) then
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ndupe=1
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exit
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endif
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enddo
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if(ndupe.ne.1 .or. minsync.lt.0) then
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if(ipass.eq.1) n65a=n65a + 1
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if(ipass.eq.2) n65b=n65b + 1
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ndecoded=ndecoded+1
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dec(ndecoded)%freq=freq+a(1)
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dec(ndecoded)%dt=dtx
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dec(ndecoded)%sync=sync2
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dec(ndecoded)%decoded=decoded
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nqual=qual
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! if(nqual.gt.10) nqual=10
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write(*,1010) nutc,nsnr,dtx-1.0,nfreq,decoded
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1010 format(i4.4,i4,f5.1,i5,1x,'#',1x,a22)
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write(13,1012) nutc,nint(sync1),nsnr,dtx-1.0,float(nfreq),ndrift, &
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decoded,nft
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1012 format(i4.4,i4,i5,f6.1,f8.0,i4,3x,a22,' JT65',i4)
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call flush(6)
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call flush(13)
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! write(79,3001) nutc,nint(sync1),nsnr,dtx-1.0,nfreq,ncandidates, &
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! nhard_min,ntotal_min,ntry,naggressive,nft,nqual,decoded
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!3001 format(i4.4,i3,i4,f6.2,i5,i7,i3,i4,i8,i3,i2,i5,1x,a22)
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! flush(79)
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endif
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decoded0=decoded
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freq0=freq
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if(decoded0.eq.' ') decoded0='*'
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!$omp end critical(decode_results)
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endif
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enddo !candidate loop
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if(ndecoded.lt.1) exit
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enddo !two-pass loop
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return
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end subroutine jt65a
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