mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-27 14:48:46 -05:00
jt9 now working up to sync detection.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@2627 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Joe Taylor
parent
aa23a8ea33
commit
10b21aa152
@ -3,6 +3,8 @@ program jt9
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! Decoder for JT9. Can run stand-alone, reading data from *.wav files;
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! or as the back end of wsjt-x, with data placed in a shared memory region.
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! NB: For unknown reason, ***MUST*** be compiled by g95 with -O0 !!!
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character*80 arg,infile
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parameter (NMAX=1800*12000) !Total sample intervals per 30 minutes
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parameter (NDMAX=1800*1500) !Sample intervals at 1500 Hz rate
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@ -12,7 +14,8 @@ program jt9
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logical*1 lstrong(0:1023)
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integer*2 id2
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complex c0
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common/jt8com/id2(NMAX),ss(184,NSMAX),savg(NSMAX),c0(NDMAX),nutc,junk(20)
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common/jt8com/id2(NMAX),ss(184,NSMAX),savg(NSMAX),c0(NDMAX), &
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nutc,npts8,junk(20)
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common/tracer/limtrace,lu
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nargs=iargc()
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@ -31,6 +34,7 @@ program jt9
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go to 999
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endif
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read(arg,*) ntrperiod
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ifile1=2
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limtrace=0
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lu=12
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@ -64,6 +68,7 @@ program jt9
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if(nsps.eq.0) stop 'Error: bad TRprtiod'
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kstep=nsps/2
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tstep=kstep/12000.0
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k=0
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nhsym0=-999
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npts=(60*ntrperiod-6)*12000
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@ -82,8 +87,8 @@ program jt9
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if(nhsym.ge.1 .and. nhsym.ne.nhsym0) then
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! Emit signal readyForFFT
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call timer('symspec ',0)
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call symspecx(k,ntrperiod,nsps,ndiskdat,nb,nbslider,pxdb,s,df3, &
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ihsym,nzap,slimit,lstrong)
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call symspecx(k,ntrperiod,nsps,ndiskdat,nb,nbslider,pxdb, &
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s,f0a,df3,ihsym,nzap,slimit,lstrong)
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call timer('symspec ',1)
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nhsym0=nhsym
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if(ihsym.ge.184) go to 10
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@ -92,9 +97,21 @@ program jt9
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10 continue
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do i=0,512
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if(lstrong(i)) print*,'Strong signal at ',12000.0*i/1024.0
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enddo
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nz=1000.0/df3
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do i=1,nz
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freq=f0a + (i-1)*df3
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write(78,3001) i,freq,savg(i)
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3001 format(i8,2f12.3)
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enddo
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print*,npts8,npts8/1500.0
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nutc=nutc0
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nstandalone=1
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call sync9(ss,df3)
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call sync9(ss,tstep,f0a,df3)
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! call decode0(dd,ss,savg,nstandalone,nfsample)
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enddo
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@ -7,7 +7,7 @@ program jt9sim
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integer*2 iwave !Generated waveform (no noise)
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real*8 f0,f,dt,twopi,phi,dphi,baud,fspan
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character msg*22,msg0*22,message*22,msgsent*22,arg*8,fname*11
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integer*4 d6(85)
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integer*4 itone(85)
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integer*4 mettab(0:255,0:1)
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integer*4 t0(13) !72-bit message as 6-bit words
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@ -64,15 +64,15 @@ program jt9sim
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if(minutes.eq.2) nsps=15360
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if(minutes.eq.5) nsps=40960
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if(minutes.eq.10) nsps=82944
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if(minutes.eq.30) nsps=250880
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if(minutes.eq.30) nsps=252000
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if(nsps.eq.0) stop 'Bad value for minutes.'
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ihdr=0 !Temporary ###
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open(12,file='msgs.txt',status='old')
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! Get the metric table
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bias=0.37
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scale=10 !Optimize?
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bias=0.37 !To be optimized, in decoder program
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scale=10 ! ... ditto ...
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open(19,file='met8.21',status='old')
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do i=0,255
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@ -87,7 +87,7 @@ program jt9sim
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'---------------------------------------------------')
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do ifile=1,nfiles
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nmin=(ifile-1)*minutes
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nmin=(ifile-1)*2*minutes
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ihr=nmin/60
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imin=mod(nmin,60)
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write(fname,1002) ihr,imin !Create the output filenames
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@ -103,7 +103,7 @@ program jt9sim
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endif
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if(msg0.ne.' ') then
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call genjt9(message,minutes,msgsent,d6)
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call genjt9(message,minutes,msgsent,itone)
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endif
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rewind 12
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@ -112,14 +112,14 @@ program jt9sim
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if(msg0.eq.' ') then
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read(12,1004) message
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1004 format(a22)
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call genjt9(message,minutes,msgsent,d6)
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call genjt9(message,minutes,msgsent,itone)
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endif
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f=f0
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if(nsigs.gt.1) f=f0 - 0.5d0*fspan + fspan*(isig-1.d0)/(nsigs-1.d0)
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snrdbx=snrdb
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! if(snrdb.ge.-1.0) snrdbx=-15.0 - 15.0*(isig-1.0)/nsigs
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sig=sqrt(2500.0/12000.0) * 10.0**(0.05*snrdbx)
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sig=sqrt(2500.0/6000.0) * 10.0**(0.05*snrdbx)
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write(*,1020) ifile,isig,f,snrdbx,msgsent
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1020 format(i3,i4,f10.3,f7.1,2x,a22)
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@ -127,7 +127,7 @@ program jt9sim
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baud=12000.0/nsps
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k=12000 !Start at t = 1 s
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do isym=1,85
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freq=f + d6(isym)*baud
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freq=f + itone(isym)*baud
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dphi=twopi*freq*dt
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do i=1,nsps
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phi=phi + dphi
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@ -135,7 +135,7 @@ program jt9sim
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if(phi.gt.twopi) phi=phi-twopi
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xphi=phi
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k=k+1
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dat(k)=dat(k) + sig*sin(xphi)
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dat(k)=dat(k) + sig*sin(xphi) !Use lookup table for i*2 sin(x) ?
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enddo
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enddo
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enddo
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@ -147,12 +147,12 @@ program jt9sim
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write(10) ihdr,iwave(1:npts)
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close(10)
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! We're done! Now decode the data in d6, as a test.
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! We're done! Now decode the data in itone, as a test.
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j=0
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do i=1,85
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if(isync(i).eq.1) cycle
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j=j+1
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t5(j)=d6(i)-1
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t5(j)=itone(i)-1
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enddo
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call graycode(t5,69,-1,t4)
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@ -1,4 +1,4 @@
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subroutine symspecx(k,ntrperiod,nsps,ndiskdat,nb,nbslider,pxdb,s,df3, &
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subroutine symspecx(k,ntrperiod,nsps,ndiskdat,nb,nbslider,pxdb,s,f0a,df3, &
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ihsym,nzap,slimit,lstrong)
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! Input:
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@ -34,10 +34,11 @@ subroutine symspecx(k,ntrperiod,nsps,ndiskdat,nb,nbslider,pxdb,s,df3, &
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complex cx(MAXFFT3)
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complex cx00(NFFT1)
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complex cx0(0:1023),cx1(0:1023)
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logical*1 lstrong(0:1023)
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logical*1 lstrong(0:1023) !Should be (0:512)
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integer*2 id2
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complex c0
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common/jt8com/id2(NMAX),ss(184,NSMAX),savg(NSMAX),c0(NDMAX),nutc,junk(20)
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common/jt8com/id2(NMAX),ss(184,NSMAX),savg(NSMAX),c0(NDMAX), &
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nutc,npts8,junk(20)
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equivalence (x2,cx2)
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data rms/999.0/,k0/99999999/,ntrperiod0/0/,nfft3z/0/
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save
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@ -90,18 +91,20 @@ subroutine symspecx(k,ntrperiod,nsps,ndiskdat,nb,nbslider,pxdb,s,df3, &
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do i=1,NFFT1
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x0(i)=fac*id2(k1+i)
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enddo
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! call timf2x(k,NFFT1,nwindow,nb,peaklimit,faclim,x0,x1, &
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! slimit,lstrong,px,nzap)
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x1=x0 !###
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call timf2x(x0,k,NFFT1,nwindow,nb,peaklimit,faclim,x1, &
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slimit,lstrong,px,nzap)
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! x1=x0
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x2=x1
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call four2a(x2,NFFT2,1,-1,0) !Second forward FFT, r2c
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i0=nint(1000.0/df2) + 1
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i0=nint(1000.0/df2)
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f0a=i0*df2
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cx2a(1:NFFT2A/2)=cx2(i0:NFFT2A/2+i0-1)
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cx2a(NFFT2A/2+1:NFFT2A)=cx2(i0-1-NFFT2A/2:i0-1)
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call four2a(cx2a,NFFT2A,1,1,1)
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c0(k8+1:k8+NFFT2A)=cx2a
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npts8=k8+NFFT2A
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!### Test for gliches at multiples of 128
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! if(k8.lt.1000) then
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@ -139,19 +142,5 @@ subroutine symspecx(k,ntrperiod,nsps,ndiskdat,nb,nbslider,pxdb,s,df3, &
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s(i)=sx
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enddo
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if(ihsym.eq.168) then
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do i=1,iz
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write(71,3001) i,i*df3,savg(i),10.0*log10(savg(i))
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3001 format(i8,3f12.3)
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enddo
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i0=673
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do j=1,ihsym
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write(72,3002) j,(ss(j,i),i=i0,i0+8)
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3002 format(i3,9f8.3)
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enddo
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endif
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999 return
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end subroutine symspecx
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@ -1,4 +1,4 @@
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subroutine sync9(ss,df3)
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subroutine sync9(ss,tstep,f0a,df3)
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parameter (NSMAX=22000) !Max length of saved spectra
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real ss(184,NSMAX)
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@ -24,7 +24,7 @@ subroutine sync9(ss,df3)
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nz=1000.0/df3
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smax=0.
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lagmax=10
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lagmax=2.5/tstep + 0.9999
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do n=1,nz
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do lag=-lagmax,lagmax
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sum=0.
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@ -35,21 +35,25 @@ subroutine sync9(ss,df3)
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if(sum.gt.smax) then
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smax=sum
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npk=n
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lagpk=lag
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endif
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enddo
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enddo
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print*,'npk:',npk
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n=npk
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freq=f0a + (npk-1)*df3
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write(*,1010) lagpk,npk,freq
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1010 format('lagpk:',i4,' npk:',i6,' freq:',f8.2)
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do lag=-lagmax,lagmax
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sum=0.
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do i=1,16
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k=ii(i) + lag
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if(k.ge.1) sum=sum + ss(k,n)
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if(k.ge.1) sum=sum + ss(k,npk)
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enddo
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write(*,3000) lag,sum
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3000 format(i3,f12.3)
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! write(73,3000) lag,sum
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!3000 format(i3,f12.3)
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enddo
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flush(73)
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return
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end subroutine sync9
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@ -1,13 +1,15 @@
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subroutine timf2(k,nfft,nwindow,nb,peaklimit,faclim,cx0,cx1, &
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subroutine timf2x(x0,k,nfft,nwindow,nb,peaklimit,faclim,x1, &
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slimit,lstrong,px,nzap)
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! Sequential processing of time-domain I/Q data, using Linrad-like
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! "first FFT" and "first backward FFT".
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! "first FFT" and "first backward FFT", treating frequencies with
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! strong signals differently. Noise blanking is applied to weak
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! signals only.
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! cx0 - complex input data
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! x0 - real input data
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! nfft - length of FFTs
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! nwindow - 0 for no window, 2 for sin^2 window
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! cx1 - output data
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! x1 - real output data
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! Non-windowed processing means no overlap, so kstep=nfft.
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! Sin^2 window has 50% overlap, kstep=nfft/2.
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@ -19,19 +21,21 @@ subroutine timf2(k,nfft,nwindow,nb,peaklimit,faclim,cx0,cx1, &
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parameter (MAXFFT=1024,MAXNH=MAXFFT/2)
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parameter (MAXSIGS=100)
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complex cx0(0:nfft-1),cx1(0:nfft-1)
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real x0(0:nfft-1),x1(0:nfft-1)
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real x(0:MAXFFT-1),xw(0:MAXFFT-1),xs(0:MAXFFT-1)
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real xwov(0:MAXNH-1),xsov(0:MAXNH-1)
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complex cx(0:MAXFFT-1),cxt(0:MAXFFT-1)
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complex cxs(0:MAXFFT-1),covxs(0:MAXNH-1) !Strong X signals
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complex cxw(0:MAXFFT-1),covxw(0:MAXNH-1) !Weak X signals
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complex cxs(0:MAXFFT-1) !Strong signals
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complex cxw(0:MAXFFT-1) !Weak signals
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real*4 w(0:MAXFFT-1)
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real*4 s(0:MAXFFT-1),stmp(0:MAXFFT-1)
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logical*1 lstrong(0:MAXFFT-1),lprev
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real*4 s(0:MAXNH),stmp(0:MAXNH)
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logical*1 lstrong(0:MAXNH),lprev
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integer ia(MAXSIGS),ib(MAXSIGS)
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complex h,u,v
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logical first
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equivalence (x,cx),(xw,cxw),(xs,cxs)
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data first/.true./
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data k0/99999999/
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save w,covxs,covxw,s,ntc,ntot,nh,kstep,fac,first,k0
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save w,xsov,xwov,s,ntc,ntot,nh,kstep,fac,first,k0
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if(first) then
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pi=4.0*atan(1.0)
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@ -50,30 +54,28 @@ subroutine timf2(k,nfft,nwindow,nb,peaklimit,faclim,cx0,cx1, &
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endif
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if(k.lt.k0) then
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covxs=0.
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covxw=0.
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xsov=0.
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xwov=0.
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endif
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k0=k
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cx(0:nfft-1)=cx0
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if(nwindow.eq.2) cx(0:nfft-1)=w(0:nfft-1)*cx(0:nfft-1)
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call four2a(cx,nfft,1,1,1) !First forward FFT
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x(0:nfft-1)=x0
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if(nwindow.eq.2) x(0:nfft-1)=w(0:nfft-1)*x(0:nfft-1)
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call four2a(x,nfft,1,-1,0) !First forward FFT, r2c
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cxt(0:nh)=cx(0:nh)
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cxt(0:nfft-1)=cx(0:nfft-1)
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! Identify frequencies with strong signals, copy frequency-domain
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! data into array cs (strong) or cw (weak).
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! Identify frequencies with strong signals.
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ntot=ntot+1
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if(mod(ntot,128).eq.5) then
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call pctile(s,stmp,1024,50,xmedian)
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call pctile(s,stmp,nh,50,xmedian)
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slimit=faclim*xmedian
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endif
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if(ntc.lt.96000/nfft) ntc=ntc+1
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if(ntc.lt.12000/nfft) ntc=ntc+1
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uu=1.0/ntc
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smax=0.
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do i=0,nfft-1
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do i=0,nh
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p=real(cxt(i))**2 + aimag(cxt(i))**2
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s(i)=(1.0-uu)*s(i) + uu*p
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lstrong(i)=(s(i).gt.slimit)
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@ -84,7 +86,7 @@ subroutine timf2(k,nfft,nwindow,nb,peaklimit,faclim,cx0,cx1, &
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lprev=.false.
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iwid=1
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ib=-99
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do i=0,nfft-1
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do i=0,nh
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if(lstrong(i) .and. (.not.lprev)) then
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if(nsigs.lt.MAXSIGS) nsigs=nsigs+1
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ia(nsigs)=i-iwid
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@ -92,7 +94,7 @@ subroutine timf2(k,nfft,nwindow,nb,peaklimit,faclim,cx0,cx1, &
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endif
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if(.not.lstrong(i) .and. lprev) then
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ib(nsigs)=i-1+iwid
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if(ib(nsigs).gt.nfft-1) ib(nsigs)=nfft-1
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if(ib(nsigs).gt.nh) ib(nsigs)=nh
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endif
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lprev=lstrong(i)
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enddo
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@ -101,15 +103,16 @@ subroutine timf2(k,nfft,nwindow,nb,peaklimit,faclim,cx0,cx1, &
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do i=1,nsigs
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ja=ia(i)
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jb=ib(i)
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if(ja.lt.0 .or. ja.gt.nfft-1 .or. jb.lt.0 .or. jb.gt.nfft-1) then
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if(ja.lt.0 .or. ja.gt.nh .or. jb.lt.0 .or. jb.gt.nh) then
|
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cycle
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||||
endif
|
||||
if(jb.eq.-99) jb=ja + min(2*iwid,nfft-1)
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||||
if(jb.eq.-99) jb=ja + min(2*iwid,nh)
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||||
lstrong(ja:jb)=.true.
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||||
enddo
|
||||
endif
|
||||
|
||||
do i=0,nfft-1
|
||||
! Copy frequency-domain data into array cs (strong) or cw (weak).
|
||||
do i=0,nh
|
||||
if(lstrong(i)) then
|
||||
cxs(i)=fac*cxt(i)
|
||||
cxw(i)=0.
|
||||
@ -119,22 +122,22 @@ subroutine timf2(k,nfft,nwindow,nb,peaklimit,faclim,cx0,cx1, &
|
||||
endif
|
||||
enddo
|
||||
|
||||
call four2a(cxw,nfft,1,-1,1) !Transform weak and strong X
|
||||
call four2a(cxs,nfft,1,-1,1) !back to time domain, separately
|
||||
call four2a(cxw,nfft,1,1,-1) !Transform weak and strong back
|
||||
call four2a(cxs,nfft,1,1,-1) !to time domain, separately (c2r)
|
||||
|
||||
if(nwindow.eq.2) then
|
||||
cxw(0:nh-1)=cxw(0:nh-1)+covxw(0:nh-1) !Add previous segment's 2nd half
|
||||
covxw(0:nh-1)=cxw(nh:nfft-1) !Save 2nd half
|
||||
cxs(0:nh-1)=cxs(0:nh-1)+covxs(0:nh-1) !Ditto for strong signals
|
||||
covxs(0:nh-1)=cxs(nh:nfft-1)
|
||||
xw(0:nh-1)=xw(0:nh-1)+xwov(0:nh-1) !Add previous segment's 2nd half
|
||||
xwov(0:nh-1)=xw(nh:nfft-1) !Save 2nd half
|
||||
xs(0:nh-1)=xs(0:nh-1)+xsov(0:nh-1) !Ditto for strong signals
|
||||
xsov(0:nh-1)=xs(nh:nfft-1)
|
||||
endif
|
||||
|
||||
! Apply noise blanking to weak data
|
||||
if(nb.ne.0) then
|
||||
do i=0,kstep-1
|
||||
peak=abs(cxw(i))
|
||||
peak=abs(xw(i))
|
||||
if(peak.gt.peaklimit) then
|
||||
cxw(i)=0.
|
||||
xw(i)=0.
|
||||
nzap=nzap+1
|
||||
endif
|
||||
enddo
|
||||
@ -142,10 +145,10 @@ subroutine timf2(k,nfft,nwindow,nb,peaklimit,faclim,cx0,cx1, &
|
||||
|
||||
! Compute power levels from weak data only
|
||||
do i=0,kstep-1
|
||||
px=px + real(cxw(i))**2 + aimag(cxw(i))**2
|
||||
px=px + xw(i)*xw(i)
|
||||
enddo
|
||||
|
||||
cx1(0:kstep-1)=cxw(0:kstep-1) + cxs(0:kstep-1) !Recombine weak + strong
|
||||
x1(0:kstep-1)=xw(0:kstep-1) + xs(0:kstep-1) !Recombine weak + strong
|
||||
|
||||
return
|
||||
end subroutine timf2
|
||||
end subroutine timf2x
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
//------------------------------------------------------------ MainWindow
|
||||
//------------------------------------------------------------- MainWindow
|
||||
#include "mainwindow.h"
|
||||
#include "ui_mainwindow.h"
|
||||
#include "devsetup.h"
|
||||
|
||||
Loading…
Reference in New Issue
Block a user