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https://github.com/saitohirga/WSJT-X.git
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Improving the QRA sync-detect algorithm.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6843 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Joe Taylor
parent
82b8b99458
commit
e23017d9e3
@ -245,9 +245,14 @@ contains
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if(ft.ge.80) then
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nft=ft-100
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csync=':'
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write(*,1009) params%nutc,snr,dt,freq,csync,decoded,nft
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1009 format(i4.4,i4,f5.1,i5,1x,a2,1x,a22,i2)
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if(snr.eq.-30 .and. decoded.eq.' ') then
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csync=': '
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write(*,1009) params%nutc,snr,dt,freq,csync,decoded
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else
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csync=':*'
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write(*,1009) params%nutc,snr,dt,freq,csync,decoded,nft
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1009 format(i4.4,i4,f5.1,i5,1x,a2,1x,a22,i2)
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endif
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write(13,1011) params%nutc,nint(sync),snr,dt,float(freq),drift, &
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decoded,nft
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1011 format(i4.4,i4,i5,f6.2,f8.0,i4,3x,a22,' QRA65',i3)
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@ -99,10 +99,8 @@ contains
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if(nsubmode.ge.100) then
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! This is QRA65 mode
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! print*,'A',nsubmode,nsubmode,nsubmode
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call qra02(dd,nf1,nf2,nfqso,ntol,mycall,sync,nsnr,dtx,nfreq,decoded,nft)
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! print*,'Z',sync,nft,decoded
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if(sync.lt.12.8) go to 900 !### Temporary ###
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! if(sync.lt.12.8) go to 900 !### Temporary ###
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if (associated(this%callback)) then
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ndrift=0
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nflip=1
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@ -9,8 +9,7 @@ subroutine qra02(dd,nf1,nf2,nfqso,ntol,mycall_12,sync,nsnr,dtx,nfreq, &
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integer icos7(0:6)
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integer ipk(1)
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integer jpk(1)
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! integer dat4(12)
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integer dat4(120)
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integer dat4(12)
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real dd(60*12000)
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real s(NZ)
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real savg(NZ)
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@ -24,10 +23,14 @@ subroutine qra02(dd,nf1,nf2,nfqso,ntol,mycall_12,sync,nsnr,dtx,nfreq, &
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common/qra65com/ss(NZ,194),s3(0:63,1:63),ccf(NZ,0:25)
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save
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! rewind 73
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! rewind 74
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! rewind 75
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! rewind 76
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! print*,'B',nf1,nf2,nfqso,ntol
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decoded=' '
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nft=100
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nsnr=-30
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nsps=6912
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istep=nsps/2
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nsteps=52*12000/istep - 2
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@ -51,10 +54,6 @@ subroutine qra02(dd,nf1,nf2,nfqso,ntol,mycall_12,sync,nsnr,dtx,nfreq, &
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call pctile(savg,NZ,45,base)
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savg=savg/base - 1.0
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ss=ss/base
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! do i=1,NZ
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! write(73,1010) i*df,savg(i),i
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!1010 format(2f10.3,i8)
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! enddo
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fa=max(nf1,nfqso-ntol)
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fb=min(nf2,nfqso+ntol)
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@ -84,6 +83,31 @@ subroutine qra02(dd,nf1,nf2,nfqso,ntol,mycall_12,sync,nsnr,dtx,nfreq, &
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enddo
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enddo
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if0=nint(f0/df)
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nfreq=nint(f0)
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blue(0:25)=ccf(if0,0:25)
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jpk=maxloc(blue)
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xpk=jpk(1) + 1.0
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call slope(blue,26,xpk)
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! Insist on at least 10 correct hard decisions in the 21 Costas bins.
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nhard=0
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do n=0,6
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ipk=maxloc(ss(i0:i0+63,1+j0+2*n)) - 1
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i=abs(ipk(1)-2*icos7(n))
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if(i.le.1) nhard=nhard+1
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ipk=maxloc(ss(i0:i0+63,1+j0+2*n+78)) - 1
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i=abs(ipk(1)-2*icos7(n))
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if(i.le.1) nhard=nhard+1
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ipk=maxloc(ss(i0:i0+63,1+j0+2*n+154)) - 1
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i=abs(ipk(1)-2*icos7(n))
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if(i.le.1) nhard=nhard+1
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enddo
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! print*,'a',nhard,nhard,nhard
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if(nhard.lt.6) go to 900
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do i=0,63
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k=i0 + 2*i
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jj=j0+13
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@ -94,55 +118,12 @@ subroutine qra02(dd,nf1,nf2,nfqso,ntol,mycall_12,sync,nsnr,dtx,nfreq, &
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enddo
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enddo
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do j=1,63
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do i=0,63
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n=0.25*s3(i,j)
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if(n.lt.0) n=0
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if(n.gt.5) n=5
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zplot(i)=mark(n)
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enddo
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ipk=maxloc(s3(0:63,j))
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! write(76,3001) j,zplot,ipk(1)-1
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!3001 format(i2,1x,'|',64a1,'|',i4)
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enddo
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if0=nint(f0/df)
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nfreq=nint(f0)
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blue(0:25)=ccf(if0,0:25)
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jpk=maxloc(blue)
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xpk=jpk(1) + 1.0
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call slope(blue,26,xpk)
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! do j=0,25
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! tsec=j*istep/12000.0
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! write(74,1020) tsec,blue(j)
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!1020 format(f5.2,i3,10f7.1)
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! enddo
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! do i=ia,ib
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! f=i*df
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! write(75,1030) f,red(i)
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!1030 format(2f10.2)
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! enddo
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! flush(74)
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! flush(75)
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! flush(76)
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decoded=' '
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nft=100
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nsnr=-30
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if(sync.gt.1.0) nsnr=nint(10.0*log10(sync) - 38.0)
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if(sync.lt.12.8) go to 900 !### Temporary ###
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! print*,'A',sync,nsnr
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if(sync.gt.1.0) nsnr=nint(10.0*log10(sync) - 39.0)
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! if(sync.lt.12.8) go to 900 !### Temporary ###
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mycall=mycall_12(1:6) !### May need fixing ###
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call packcall(mycall,nmycall,ltext)
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! write(77,3002) s3
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!3002 format(f10.3)
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! flush(77)
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! print*,'a',sync,dtx,base
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call qra65_dec(s3,nmycall,dat4,irc) !Attempt decoding
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! print*,'z',sync,dtx,nfreq
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if(irc.ge.0) then
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call unpackmsg(dat4,decoded) !Unpack the user message
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call fmtmsg(decoded,iz)
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