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https://github.com/saitohirga/WSJT-X.git
synced 2024-11-25 13:48:42 -05:00
More work on K=50 decoding.
This commit is contained in:
Steven Franke
Bill Somerville
parent
65ff3ce05e
commit
fc3e24f696
@ -68,8 +68,9 @@ contains
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integer mcq(29),mrrr(19),m73(19),mrr73(19)
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logical badsync,unpk77_success,single_decode
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logical first,nohiscall,lwspr,ex,wcalls_exists,donocrcdecode
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logical new_callsign
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logical first,nohiscall,lwspr
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logical new_callsign,plotspec_exists,wcalls_exists,do_nocrc_decode
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logical decdata_exists
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integer*2 iwave(30*60*12000)
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@ -234,15 +235,15 @@ contains
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if(ndepth.eq.3) then
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nblock=4
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jittermax=2
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donocrcdecode=.true.
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do_nocrc_decode=.true.
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elseif(ndepth.eq.2) then
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nblock=4
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jittermax=2
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donocrcdecode=.false.
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do_nocrc_decode=.false.
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elseif(ndepth.eq.1) then
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nblock=4
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jittermax=0
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donocrcdecode=.false.
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do_nocrc_decode=.false.
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endif
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ndropmax=1
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@ -479,52 +480,24 @@ contains
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write(c77,'(77i1)') mod(message101(1:77)+rvec,2)
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call unpack77(c77,1,msg,unpk77_success)
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elseif(iwspr.eq.1) then
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iaptype=0
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if( donocrcdecode ) then
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maxosd=1
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call timer('d240_74 ',0)
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Keff=50
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norder=4
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call decode240_74(llr,Keff,maxosd,norder,apmask,message74,cw, &
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ntype,nharderrors,dmin)
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call timer('d240_74 ',1)
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if(count(cw.eq.1).eq.0) then
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nharderrors=-nharderrors
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cycle
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endif
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write(c77,'(50i1)') message74(1:50)
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c77(51:77)='000000000000000000000110000'
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call unpack77(c77,1,msg,unpk77_success)
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if(unpk77_success) then
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unpk77_success=.false.
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do i=1,nwcalls
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if(index(msg,trim(wcalls(i))).gt.0) then
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unpk77_success=.true.
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iaptype=8
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endif
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enddo
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endif
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! First try decoding with Keff=64
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maxosd=2
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call timer('d240_74 ',0)
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Keff=64
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norder=3
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call decode240_74(llr,Keff,maxosd,norder,apmask,message74,cw, &
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ntype,nharderrors,dmin)
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call timer('d240_74 ',1)
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if(nharderrors.lt.0) goto 3465
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if(count(cw.eq.1).eq.0) then
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nharderrors=-nharderrors
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cycle
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endif
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if(.not. unpk77_success) then
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maxosd=2
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call timer('d240_74 ',0)
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Keff=64
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norder=3
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call decode240_74(llr,Keff,maxosd,norder,apmask,message74,cw, &
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ntype,nharderrors,dmin)
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call timer('d240_74 ',1)
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if(nharderrors.lt.0) cycle
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if(count(cw.eq.1).eq.0) then
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nharderrors=-nharderrors
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cycle
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endif
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write(c77,'(50i1)') message74(1:50)
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c77(51:77)='000000000000000000000110000'
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call unpack77(c77,1,msg,unpk77_success)
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endif
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if(unpk77_success.and.Keff.eq.64) then
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write(c77,'(50i1)') message74(1:50)
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c77(51:77)='000000000000000000000110000'
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call unpack77(c77,1,msg,unpk77_success)
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if(unpk77_success) then
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! If decode was obtained with Keff=64, save call/grid in fst4w_calls.txt if not there already.
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i1=index(msg,' ')
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i2=i1+index(msg(i1+1:),' ')
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wpart=trim(msg(1:i2))
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@ -545,6 +518,36 @@ contains
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endif
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endif
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endif
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3465 continue
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! If no decode then try Keff=50
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iaptype=0
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if( .not. unpk77_success .and. do_nocrc_decode ) then
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maxosd=1
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call timer('d240_74 ',0)
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Keff=50
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norder=4
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call decode240_74(llr,Keff,maxosd,norder,apmask,message74,cw, &
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ntype,nharderrors,dmin)
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call timer('d240_74 ',1)
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if(count(cw.eq.1).eq.0) then
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nharderrors=-nharderrors
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cycle
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endif
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write(c77,'(50i1)') message74(1:50)
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c77(51:77)='000000000000000000000110000'
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call unpack77(c77,1,msg,unpk77_success)
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! No CRC in this mode, so only accept the decode if call/grid have been seen before
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if(unpk77_success) then
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unpk77_success=.false.
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do i=1,nwcalls
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if(index(msg,trim(wcalls(i))).gt.0) then
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unpk77_success=.true.
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endif
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enddo
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endif
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endif
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endif
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if(nharderrors .ge.0 .and. unpk77_success) then
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@ -561,10 +564,10 @@ contains
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else
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call get_fst4_tones_from_bits(message74,itone,1)
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endif
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inquire(file='plotspec',exist=ex)
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inquire(file='plotspec',exist=plotspec_exists)
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fmid=-999.0
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call timer('dopsprd ',0)
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if(ex) then
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if(plotspec_exists) then
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call dopspread(itone,iwave,nsps,nmax,ndown,hmod, &
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isbest,fc_synced,fmid,w50)
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endif
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@ -586,13 +589,13 @@ contains
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endif
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nsnr=nint(xsnr)
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qual=0.0
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if(iaptype.eq.8) qual=1.
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fsig=fc_synced - 1.5*baud
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if(ex) then
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inquire(file='decdata',exist=decdata_exists)
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if(decdata_exists) then
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write(21,3021) nutc,icand,itry,nsyncoh,iaptype, &
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ijitter,ntype,nsync_qual,nharderrors,dmin, &
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ijitter,ntype,Keff,nsync_qual,nharderrors,dmin, &
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sync,xsnr,xdt,fsig,w50,trim(msg)
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3021 format(i6.6,6i3,2i4,f6.1,f7.2,f6.1,f6.2,f7.1,f7.3,1x,a)
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3021 format(i6.6,6i3,3i4,f6.1,f9.2,f6.1,f6.2,f7.1,f7.3,1x,a)
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flush(21)
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endif
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call this%callback(nutc,smax1,nsnr,xdt,fsig,msg, &
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@ -604,6 +607,7 @@ contains
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enddo ! istart jitter
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800 enddo !candidate list
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enddo ! noise blanker loop
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if(new_callsign) then ! re-write the fst4w_calls.txt file
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open(42,file=trim(data_dir)//'/fst4w_calls.txt',status='unknown')
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do i=1,nwcalls
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@ -611,6 +615,7 @@ contains
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enddo
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close(42)
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endif
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900 return
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end subroutine decode
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