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Code cleanup and test ofFT8 decodes with erasures. Do not use on the air.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7879 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Joe Taylor
parent
230b10ab2f
commit
a8cba435d4
@ -390,7 +390,7 @@ contains
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end select
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end subroutine jt9_decoded
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subroutine ft8_decoded (this,sync,snr,dt,freq,nbadcrc,decoded)
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subroutine ft8_decoded (this,sync,snr,dt,freq,decoded)
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use ft8_decode
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implicit none
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@ -399,17 +399,14 @@ contains
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integer, intent(in) :: snr
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real, intent(in) :: dt
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real, intent(in) :: freq
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integer, intent(in) :: nbadcrc
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character(len=22), intent(in) :: decoded
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if(nbadcrc.eq.0) then
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write(*,1000) params%nutc,snr,dt,nint(freq),decoded
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1000 format(i6.6,i4,f5.1,i5,' ~ ',1x,a22)
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write(13,1002) params%nutc,nint(sync),snr,dt,freq,0,decoded
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1002 format(i6.6,i4,i5,f6.1,f8.0,i4,3x,a22,' FT8')
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call flush(6)
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call flush(13)
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endif
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write(*,1000) params%nutc,snr,dt,nint(freq),decoded
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1000 format(i6.6,i4,f5.1,i5,' ~ ',1x,a22)
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write(13,1002) params%nutc,nint(sync),snr,dt,freq,0,decoded
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1002 format(i6.6,i4,i5,f6.1,f8.0,i4,3x,a22,' FT8')
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call flush(6)
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call flush(13)
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select type(this)
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type is (counting_ft8_decoder)
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@ -1,5 +1,5 @@
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subroutine ft8b(dd0,newdat,nfqso,ndepth,lsubtract,icand,sync0,f1,xdt,apsym,nharderrors, &
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dmin,nbadcrc,iap,ipass,message,xsnr)
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subroutine ft8b(dd0,newdat,nfqso,ndepth,lsubtract,icand,sync0,f1,xdt, &
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apsym,nharderrors,dmin,nbadcrc,iap,ipass,iera,message,xsnr)
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use timer_module, only: timer
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include 'ft8_params.f90'
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@ -9,7 +9,7 @@ subroutine ft8b(dd0,newdat,nfqso,ndepth,lsubtract,icand,sync0,f1,xdt,apsym,nhard
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real a(5)
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real s1(0:7,ND),s2(0:7,NN)
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real ps(0:7)
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real rxdata(3*ND),llr(3*ND),llrap(3*ND) !Soft symbols
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real rxdata(3*ND),llr(3*ND),llr0(3*ND),llrap(3*ND) !Soft symbols
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real dd0(15*12000)
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integer*1 decoded(KK),apmask(3*ND),cw(3*ND)
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integer*1 msgbits(KK)
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@ -109,88 +109,100 @@ subroutine ft8b(dd0,newdat,nfqso,ndepth,lsubtract,icand,sync0,f1,xdt,apsym,nhard
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rxdata=rxdata/rxsig
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ss=0.84
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llr=2.0*rxdata/(ss*ss)
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llr0=llr
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apmag=4.0
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! do iap=0,1
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! nera=1
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nera=3
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! do iap=0,3
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do iap=0,0 !### Temporary ###
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if(iap.eq.0) then
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apmask=0
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apmask(160:162)=1
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llrap=llr
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llrap(160:162)=apmag*apsym(73:75)/ss
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elseif(iap.eq.1) then
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apmask=0
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apmask(88:115)=1 ! mycall
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apmask(144)=1 ! not free text
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apmask(160:162)=1 ! 3 extra bits
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llrap=0.0
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llrap(88:115)=apmag*apsym(1:28)/ss
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llrap(144)=-apmag/ss
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llrap(160:162)=apmag*apsym(73:75)/ss
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where(apmask.eq.0) llrap=llr
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elseif(iap.eq.2) then
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apmask=0
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apmask(88:115)=1 ! mycall
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apmask(116:143)=1 ! hiscall
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apmask(144)=1 ! not free text
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apmask(160:162)=1 ! 3 extra bits
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llrap=0.0
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llrap(88:143)=apmag*apsym(1:56)/ss
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llrap(144)=-apmag/ss
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llrap(160:162)=apmag*apsym(73:75)/ss
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where(apmask.eq.0) llrap=llr
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elseif(iap.eq.3) then
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apmask=0
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apmask(88:115)=1 ! mycall
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apmask(116:143)=1 ! hiscall
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apmask(144:154)=1 ! RRR or 73
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apmask(160:162)=1 ! 3 extra bits
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llrap=0.0
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llrap(88:143)=apmag*apsym(1:56)/ss
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llrap(144:154)=apmag*rr73/ss
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llrap(160:162)=apmag*apsym(73:75)/ss
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where(apmask.eq.0) llrap=llr
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endif
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cw=0
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call timer('bpd174 ',0)
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call bpdecode174(llrap,apmask,max_iterations,decoded,cw,nharderrors,niterations)
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call timer('bpd174 ',1)
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dmin=0.0
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if(ndepth.eq.3 .and. abs(nfqso-f1).lt.10.0 .and. nharderrors.lt.0) then
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call timer('osd174 ',0)
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call osd174(llrap,apmask,norder,decoded,cw,nharderrors,dmin)
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call timer('osd174 ',1)
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endif
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nbadcrc=1
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message=' '
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xsnr=-99.0
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if(count(cw.eq.0).eq.174) cycle !Reject the all-zero codeword
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do iera=1,nera
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llr=llr0
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nblank=0
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if(nera.eq.3 .and. iera.eq.1) nblank=48
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if(nera.eq.3 .and. iera.eq.2) nblank=24
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if(nera.eq.3 .and. iera.eq.3) nblank=0
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if(nblank.gt.0) llr(1:nblank)=0.
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if(iap.eq.0) then
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apmask=0
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apmask(160:162)=1
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llrap=llr
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llrap(160:162)=apmag*apsym(73:75)/ss
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elseif(iap.eq.1) then
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apmask=0
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apmask(88:115)=1 ! mycall
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apmask(144)=1 ! not free text
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apmask(160:162)=1 ! 3 extra bits
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llrap=0.0
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llrap(88:115)=apmag*apsym(1:28)/ss
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llrap(144)=-apmag/ss
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llrap(160:162)=apmag*apsym(73:75)/ss
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where(apmask.eq.0) llrap=llr
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elseif(iap.eq.2) then
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apmask=0
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apmask(88:115)=1 ! mycall
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apmask(116:143)=1 ! hiscall
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apmask(144)=1 ! not free text
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apmask(160:162)=1 ! 3 extra bits
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llrap=0.0
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llrap(88:143)=apmag*apsym(1:56)/ss
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llrap(144)=-apmag/ss
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llrap(160:162)=apmag*apsym(73:75)/ss
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where(apmask.eq.0) llrap=llr
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elseif(iap.eq.3) then
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apmask=0
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apmask(88:115)=1 ! mycall
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apmask(116:143)=1 ! hiscall
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apmask(144:154)=1 ! RRR or 73
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apmask(160:162)=1 ! 3 extra bits
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llrap=0.0
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llrap(88:143)=apmag*apsym(1:56)/ss
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llrap(144:154)=apmag*rr73/ss
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llrap(160:162)=apmag*apsym(73:75)/ss
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where(apmask.eq.0) llrap=llr
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endif
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cw=0
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call timer('bpd174 ',0)
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call bpdecode174(llrap,apmask,max_iterations,decoded,cw,nharderrors, &
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niterations)
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call timer('bpd174 ',1)
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dmin=0.0
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if(ndepth.eq.3 .and. abs(nfqso-f1).lt.10.0 .and. nharderrors.lt.0) then
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call timer('osd174 ',0)
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call osd174(llrap,apmask,norder,decoded,cw,nharderrors,dmin)
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call timer('osd174 ',1)
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endif
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nbadcrc=1
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message=' '
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xsnr=-99.0
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if(count(cw.eq.0).eq.174) cycle !Reject the all-zero codeword
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! if( nharderrors.ge.0 .and. dmin.le.30.0 .and. nharderrors .lt. 30) then
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!*** These thresholds should probably be dependent on nap
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if( nharderrors.ge.0 .and. dmin.le.50.0 .and. nharderrors .lt. 50) then
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call chkcrc12a(decoded,nbadcrc)
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else
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nharderrors=-1
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cycle
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endif
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if(nbadcrc.eq.0) then
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call extractmessage174(decoded,message,ncrcflag,recent_calls,nrecent)
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call genft8(message,msgsent,msgbits,itone)
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if(lsubtract) call subtractft8(dd0,itone,f1,xdt2)
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xsig=0.0
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xnoi=0.0
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do i=1,79
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xsig=xsig+s2(itone(i),i)**2
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ios=mod(itone(i)+4,7)
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xnoi=xnoi+s2(ios,i)**2
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if( nharderrors.ge.0 .and. dmin.le.50.0 .and. nharderrors .lt. 50) then
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call chkcrc12a(decoded,nbadcrc)
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else
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nharderrors=-1
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cycle
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endif
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if(nbadcrc.eq.0) then
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call extractmessage174(decoded,message,ncrcflag,recent_calls,nrecent)
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call genft8(message,msgsent,msgbits,itone)
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if(lsubtract) call subtractft8(dd0,itone,f1,xdt2)
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xsig=0.0
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xnoi=0.0
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do i=1,79
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xsig=xsig+s2(itone(i),i)**2
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ios=mod(itone(i)+4,7)
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xnoi=xnoi+s2(ios,i)**2
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enddo
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xsnr=0.001
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if(xnoi.gt.0 .and. xnoi.lt.xsig) xsnr=xsig/xnoi-1.0
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xsnr=10.0*log10(xsnr)-27.0
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if(xsnr .lt. -24.0) xsnr=-24.0
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exit
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endif
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enddo
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xsnr=0.001
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if( xnoi.gt.0 .and. xnoi.lt.xsig ) xsnr=xsig/xnoi-1.0
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xsnr=10.0*log10(xsnr)-27.0
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if( xsnr .lt. -24.0 ) xsnr=-24.0
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! write(50,3050) icand,sync0,f1,xdt,xsnr,nharderrors,niterations,dmin,iap,ipass,message
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!3050 format(i3,4f10.3,i5,i5,f10.3,i4,i4,2x,a22)
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return
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endif
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enddo
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return
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end subroutine ft8b
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@ -7,7 +7,7 @@ module ft8_decode
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end type ft8_decoder
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abstract interface
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subroutine ft8_decode_callback (this,sync,snr,dt,freq,nbadcrc,decoded)
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subroutine ft8_decode_callback (this,sync,snr,dt,freq,decoded)
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import ft8_decoder
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implicit none
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class(ft8_decoder), intent(inout) :: this
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@ -15,7 +15,6 @@ module ft8_decode
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integer, intent(in) :: snr
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real, intent(in) :: dt
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real, intent(in) :: freq
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integer, intent(in) :: nbadcrc
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character(len=22), intent(in) :: decoded
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end subroutine ft8_decode_callback
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end interface
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@ -77,13 +76,17 @@ contains
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xdt=candidate(2,icand)
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nsnr0=min(99,nint(10.0*log10(sync) - 25.5)) !### empirical ###
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call timer('ft8b ',0)
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call ft8b(dd,newdat,nfqso,ndepth,lsubtract,icand,sync,f1,xdt,apsym,nharderrors, &
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dmin,nbadcrc,iap,ipass,message,xsnr)
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call ft8b(dd,newdat,nfqso,ndepth,lsubtract,icand,sync,f1,xdt, &
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apsym,nharderrors,dmin,nbadcrc,iap,ipass,iera,message,xsnr)
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nsnr=xsnr
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xdt=xdt-0.6
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call timer('ft8b ',1)
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if (associated(this%callback)) call this%callback(sync,nsnr,xdt, &
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f1,nbadcrc,message)
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if(nbadcrc.eq.0 .and. associated(this%callback)) then
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call this%callback(sync,nsnr,xdt,f1,message)
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write(81,3081) ncand,icand,iera,nharderrors,ipass, &
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sync,f1,xdt,dmin,xsnr,message
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3081 format(2i5,i2,i3,i2,2f7.1,3f7.2,1x,a22)
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endif
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enddo
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! h=default_header(12000,NMAX)
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! open(10,file='subtract.wav',status='unknown',access='stream')
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