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https://github.com/saitohirga/WSJT-X.git
synced 2024-11-25 05:38:46 -05:00
Add a standalone FT8 decoder, for testing.
This commit is contained in:
Joe Taylor
parent
ef84d60f98
commit
95599a7153
@ -452,6 +452,8 @@ set (wsjt_FSRCS
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lib/ft8/ft8b.f90
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lib/ft8/ft8code.f90
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lib/ft8/ft8_downsample.f90
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lib/ft8.f90
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lib/ft8dec.f90
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lib/ft8/ft8sim.f90
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lib/gen4.f90
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lib/gen65.f90
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@ -1245,6 +1247,9 @@ target_link_libraries (jt65 wsjt_fort wsjt_cxx)
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add_executable (ft8code lib/ft8/ft8code.f90 wsjtx.rc)
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target_link_libraries (ft8code wsjt_fort wsjt_cxx)
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add_executable (ft8 lib/ft8.f90 wsjtx.rc)
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target_link_libraries (ft8 wsjt_fort wsjt_cxx)
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add_executable (ft8sim lib/ft8/ft8sim.f90 wsjtx.rc)
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target_link_libraries (ft8sim wsjt_fort wsjt_cxx)
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49
lib/ft8.f90
Normal file
49
lib/ft8.f90
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@ -0,0 +1,49 @@
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program ft8
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integer*2 iwave(15*12000)
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logical lft8apon,lapcqonly,nagain,newdat
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character*12 mycall12,hiscall12
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character*6 hisgrid6
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character arg*8,infile*80
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integer ihdr(11)
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nargs=iargc()
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if(nargs.lt.3) then
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print*,'Usage: ft8 nfa nfb ndepth infile'
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print*,'Example: ft8 200 4000 3 181201_180315.wav'
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go to 999
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endif
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call getarg(1,arg)
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read(arg,*) nfa
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call getarg(2,arg)
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read(arg,*) nfb
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call getarg(3,arg)
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read(arg,*) ndepth
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nfiles=nargs-3
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nQSOProgress=0
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nfqso=1500
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nftx=0
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newdat=.true.
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nutc=0
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ncontest=0
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nagain=.false.
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lft8apon=.false.
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lapcqonly=.false.
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napwid=75
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mycall12='K1ABC'
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hiscall12='W9XYZ'
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hisgrid6='EN37wb'
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do ifile=1,nfiles
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call getarg(3+ifile,infile)
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open(10,file=infile,status='old',access='stream')
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read(10) ihdr,iwave
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close(10)
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call ft8dec(iwave,nQSOProgress,nfqso,nftx,newdat, &
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nutc,nfa,nfb,ndepth,ncontest,nagain,lft8apon,lapcqonly, &
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napwid,mycall12,hiscall12,hisgrid6)
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enddo
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999 end program ft8
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111
lib/ft8dec.f90
Normal file
111
lib/ft8dec.f90
Normal file
@ -0,0 +1,111 @@
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subroutine ft8dec(iwave,nQSOProgress,nfqso,nftx,newdat, &
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nutc,nfa,nfb,ndepth,ncontest,nagain,lft8apon,lapcqonly, &
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napwid,mycall12,hiscall12,hisgrid6)
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! use wavhdr
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use timer_module, only: timer
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include 'ft8/ft8_params.f90'
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! type(hdr) h
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parameter (MAXCAND=300)
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real s(NH1,NHSYM)
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real sbase(NH1)
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real candidate(3,MAXCAND)
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real dd(15*12000)
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logical, intent(in) :: lft8apon,lapcqonly,nagain
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logical newdat,lsubtract,ldupe
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character*12 mycall12,hiscall12,mycall12_0
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character*6 hisgrid6
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integer*2 iwave(15*12000)
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integer apsym2(58)
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character datetime*13,msg37*37
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! character message*22
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character*37 allmessages(100)
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integer allsnrs(100)
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data mycall12_0/'dummy'/
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save s,dd,mycall12_0
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if(mycall12.ne.mycall12_0) then
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mycall12_0=mycall12
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endif
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write(datetime,1001) nutc !### TEMPORARY ###
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1001 format("000000_",i6.6)
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call ft8apset(mycall12,hiscall12,apsym2)
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dd=iwave
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ndecodes=0
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allmessages=' '
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allsnrs=0
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ifa=nfa
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ifb=nfb
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if(nagain) then
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ifa=nfqso-10
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ifb=nfqso+10
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endif
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! For now:
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! ndepth=1: no subtraction, 1 pass, belief propagation only
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! ndepth=2: subtraction, 3 passes, belief propagation only
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! ndepth=3: subtraction, 3 passes, bp+osd
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if(ndepth.eq.1) npass=1
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if(ndepth.ge.2) npass=3
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do ipass=1,npass
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newdat=.true. ! Is this a problem? I hijacked newdat.
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syncmin=1.5
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if(ipass.eq.1) then
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lsubtract=.true.
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if(ndepth.eq.1) lsubtract=.false.
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elseif(ipass.eq.2) then
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n2=ndecodes
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if(ndecodes.eq.0) cycle
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lsubtract=.true.
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elseif(ipass.eq.3) then
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if((ndecodes-n2).eq.0) cycle
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lsubtract=.false.
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endif
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call timer('sync8 ',0)
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maxc=MAXCAND
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call sync8(dd,ifa,ifb,syncmin,nfqso,maxc,s,candidate, &
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ncand,sbase)
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call timer('sync8 ',1)
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do icand=1,ncand
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sync=candidate(3,icand)
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f1=candidate(1,icand)
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xdt=candidate(2,icand)
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xbase=10.0**(0.1*(sbase(nint(f1/3.125))-40.0))
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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,nQSOProgress,nfqso,nftx,ndepth,lft8apon, &
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lapcqonly,napwid,lsubtract,nagain,ncontest,iaptype,mycall12, &
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hiscall12,sync,f1,xdt,xbase,apsym2,nharderrors,dmin, &
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nbadcrc,iappass,iera,msg37,xsnr)
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call timer('ft8b ',1)
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nsnr=nint(xsnr)
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xdt=xdt-0.5
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hd=nharderrors+dmin
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if(nbadcrc.eq.0) then
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ldupe=.false.
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do id=1,ndecodes
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if(msg37.eq.allmessages(id).and.nsnr.le.allsnrs(id)) ldupe=.true.
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enddo
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if(.not.ldupe) then
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ndecodes=ndecodes+1
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allmessages(ndecodes)=msg37
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allsnrs(ndecodes)=nsnr
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endif
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! write(81,1004) nutc,ncand,icand,ipass,iaptype,iappass, &
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! nharderrors,dmin,hd,min(sync,999.0),nint(xsnr), &
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! xdt,nint(f1),msg37
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!1004 format(i6.6,2i4,3i2,i3,3f6.1,i4,f6.2,i5,2x,a37)
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! flush(81)
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if(.not.ldupe) then
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qual=1.0-(nharderrors+dmin)/60.0 ! scale qual to [0.0,1.0]
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write(*,1010) min(sync,999.0),nsnr,xdt,nint(f1), &
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iaptype,qual,msg37
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1010 format(f5.1,i4,f5.2,i5,i3,f5.1,1x,a37)
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endif
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endif
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enddo
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enddo
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return
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end subroutine ft8dec
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