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https://github.com/saitohirga/WSJT-X.git
synced 2024-11-25 13:48:42 -05:00
Merge branch 'develop' of bitbucket.org:k1jt/wsjtx into develop
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commit
38bac5e335
@ -209,7 +209,7 @@ subroutine extract(s3,nadd,mode65,ntrials,naggressive,ndepth,nflip, &
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tmp(i)=correct(64-i)
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enddo
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correct(1:63)=tmp(1:63)
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call interleave63(correct,63,1)
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call interleave63(correct,1)
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call graycode65(correct,63,1)
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call unpackmsg(dat4,decoded) !Unpack the user message
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ncount=0
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@ -9,7 +9,7 @@ subroutine filt8(f0,nslots,width,wave)
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equivalence (x,cx)
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x=wave
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call four2a(x,NFFT,1,-1,0) !r2c
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call four2a(cx,NFFT,1,-1,0) !r2c
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df=12000.0/NFFT
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fa=f0 - 0.5*6.25
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fb=f0 + 7.5*6.25 + (nslots-1)*60.0
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@ -418,7 +418,7 @@ subroutine ft8b(dd0,newdat,nQSOProgress,nfqso,nftx,ndepth,nzhsym,lapon, &
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endif
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nbadcrc=0 ! If we get this far: valid codeword, valid (i3,n3), nonquirky message.
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call get_ft8_tones_from_77bits(message77,itone)
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if(lsubtract) call subtractft8(dd0,itone,f1,xdt)
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if(lsubtract) call subtractft8(dd0,itone,f1,xdt,.false.)
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! write(21,3001) nzhsym,npasses,nqsoprogress,ipass,iaptype,lsubtract, &
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! f1,xdt,msg37(1:22); flush(21)
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!3001 format(5i3,L3,f7.1,f7.2,2x,a22)
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@ -1,4 +1,4 @@
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subroutine subtractft8(dd,itone,f0,dt)
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subroutine subtractft8(dd0,itone,f0,dt,ldt)
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! Subtract an ft8 signal
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!
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@ -7,60 +7,98 @@ subroutine subtractft8(dd,itone,f0,dt)
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! Complex amp : cfilt(t) = LPF[ dd(t)*CONJG(cref(t)) ]
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! Subtract : dd(t) = dd(t) - 2*REAL{cref*cfilt}
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use timer_module, only: timer
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parameter (NMAX=15*12000,NFRAME=1920*79)
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parameter (NFFT=NMAX,NFILT=1400)
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real*4 dd(NMAX), window(-NFILT/2:NFILT/2), xjunk
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complex cref,camp,cfilt,cw
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parameter (NFFT=NMAX,NFILT=2800)
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real dd(NMAX),dd0(NMAX)
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real window(-NFILT/2:NFILT/2)
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real x(NFFT+2)
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complex cx(0:NFFT/2)
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complex cref,camp,cfilt,cw,z
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integer itone(79)
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logical first
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logical first,ldt
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data first/.true./
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common/heap8/cref(NFRAME),camp(NMAX),cfilt(NMAX),cw(NMAX),xjunk(NFRAME)
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save first
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common/heap8/cref(NFRAME),camp(NMAX),cfilt(NMAX),cw(NMAX)
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equivalence (x,cx)
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save first,/heap8/
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nstart=dt*12000+1
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nsym=79
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nsps=1920
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fs=12000.0
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icmplx=1
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bt=2.0
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call gen_ft8wave(itone,nsym,nsps,bt,fs,f0,cref,xjunk,icmplx,NFRAME)
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camp=0.
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do i=1,nframe
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id=nstart-1+i
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if(id.ge.1.and.id.le.NMAX) camp(i)=dd(id)*conjg(cref(i))
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enddo
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if(first) then
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! Create and normalize the filter
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if(first) then ! Create and normalize the filter
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pi=4.0*atan(1.0)
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fac=1.0/float(nfft)
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sum=0.0
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sumw=0.0
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do j=-NFILT/2,NFILT/2
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window(j)=cos(pi*j/NFILT)**2
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sum=sum+window(j)
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sumw=sumw+window(j)
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enddo
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cw=0.
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cw(1:NFILT+1)=window/sum
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cw(1:NFILT+1)=window/sumw
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cw=cshift(cw,NFILT/2+1)
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call four2a(cw,nfft,1,-1,1)
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cw=cw*fac
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first=.false.
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endif
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cfilt=0.0
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cfilt(1:nframe)=camp(1:nframe)
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call four2a(cfilt,nfft,1,-1,1)
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cfilt(1:nfft)=cfilt(1:nfft)*cw(1:nfft)
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call four2a(cfilt,nfft,1,1,1)
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! Generate complex reference waveform
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call gen_ft8wave(itone,79,1920,2.0,12000.0,f0,cref,xjunk,1,NFRAME)
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! Subtract the reconstructed signal
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do i=1,nframe
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j=nstart+i-1
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if(j.ge.1 .and. j.le.NMAX) dd(j)=dd(j)-2*REAL(cfilt(i)*cref(i))
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enddo
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if(ldt) then !Are we refining DT ?
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sqa=sqf(-300)
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sqb=sqf(300)
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endif
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sq0=sqf(0) !Do the subtraction with idt=0
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if(ldt) then
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call peakup(sqa,sq0,sqb,dx)
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if(abs(dx).gt.1.0) return !No acceptable minimum: do not subtract
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i1=nint(300.0*dx) !First approximation of best idt
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sqa=sqf(i1-60)
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sqb=sqf(i1+60)
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sq0=sqf(i1)
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call peakup(sqa,sq0,sqb,dx)
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if(abs(dx).gt.1.0) return !No acceptable minimum: do not subtract
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i2=nint(60.0*dx) + i1 !Best estimate of idt
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sq0=sqf(i2) !Do the subtraction with idt=i2
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endif
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dd0=dd !Return dd0 with this signal subtracted
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return
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end subroutine subtractft8
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contains
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real function sqf(idt) !Internal function: all variables accessible
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nstart=dt*12000+1 + idt
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camp=0.
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dd=dd0
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do i=1,nframe
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j=nstart-1+i
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if(j.ge.1.and.j.le.NMAX) camp(i)=dd(j)*conjg(cref(i))
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enddo
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cfilt(1:nframe)=camp(1:nframe)
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cfilt(nframe+1:)=0.0
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call four2a(cfilt,nfft,1,-1,1)
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cfilt(1:nfft)=cfilt(1:nfft)*cw(1:nfft)
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call four2a(cfilt,nfft,1,1,1)
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x=0.
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do i=1,nframe
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j=nstart+i-1
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if(j.ge.1 .and. j.le.NMAX) then
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z=cfilt(i)*cref(i)
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dd(j)=dd(j)-2.0*real(z) !Subtract the reconstructed signal
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x(i)=dd(j)
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endif
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enddo
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sqq=0.
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if(ldt) then
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call four2a(cx,NFFT,1,-1,0) !Forward FFT, r2c
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df=12000.0/NFFT
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ia=(f0-1.5*6.25)/df
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ib=(f0+8.5*6.25)/df
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do i=ia,ib
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sqq=sqq + real(cx(i))*real(cx(i)) + aimag(cx(i))*aimag(cx(i))
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enddo
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endif
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sqf=sqq
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return
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end function sqf
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end subroutine subtractft8
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@ -77,7 +77,7 @@ contains
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endif
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if(nzhsym.eq.50 .and. ndec_early.ge.1) then
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do i=1,ndec_early
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call subtractft8(dd,itone_save(1,i),f1_save(i),xdt_save(i))
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call subtractft8(dd,itone_save(1,i),f1_save(i),xdt_save(i),.true.)
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enddo
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endif
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ifa=nfa
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@ -11,7 +11,7 @@ subroutine lpf1(dd,jz,dat,jz2)
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fac=1.0/float(NFFT1)
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x(1:jz)=fac*dd(1:jz)
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x(jz+1:NFFT1)=0.0
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call four2a(x,NFFT1,1,-1,0) !Forwarxd FFT, r2c
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call four2a(cx,NFFT1,1,-1,0) !Forwarxd FFT, r2c
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cx(NFFT2/2:)=0.0
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! df=11025.0/NFFT1
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@ -40,7 +40,7 @@ subroutine refspectrum(id2,bclear,brefspec,buseref,fname)
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if(brefspec) then
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x(0:NH-1)=0.001*id2(1:NH)
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x(NH:NFFT-1)=0.0
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call four2a(x,NFFT,1,-1,0) !r2c FFT
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call four2a(cx,NFFT,1,-1,0) !r2c FFT
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do i=1,NH
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s(i)=s(i) + real(cx(i))**2 + aimag(cx(i))**2
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@ -134,7 +134,7 @@ subroutine refspectrum(id2,bclear,brefspec,buseref,fname)
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! Make the filter causal for overlap and add.
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cx(0)=0.0
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cx(1:NH)=fil(1:NH)/NFFT
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call four2a(x,NFFT,1,1,-1)
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call four2a(cx,NFFT,1,1,-1)
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x=cshift(x,-400)
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x(800:NH)=0.0
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call four2a(cx,NFFT,1,-1,0)
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@ -146,7 +146,7 @@ subroutine refspectrum(id2,bclear,brefspec,buseref,fname)
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x(0:NH-1)=id2(1:NH)
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x(NH:NFFT-1)=0.0
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x=x/NFFT
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call four2a(x,NFFT,1,-1,0)
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call four2a(cx,NFFT,1,-1,0)
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cx=cfil*cx
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call four2a(cx,NFFT,1,1,-1)
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x(0:NH-1)=x(0:NH-1)+xs
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@ -59,7 +59,7 @@ subroutine timf2(x0,k,nfft,nwindow,nb,peaklimit,x1, &
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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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call four2a(cx,nfft,1,-1,0) !First forward FFT, r2c
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cxt(0:nh)=cx(0:nh)
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! Identify frequencies with strong signals.
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@ -14,7 +14,7 @@ subroutine wav11(d2,npts,dd)
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jz=min(NZ12,npts)
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x(1:jz)=d2(1:jz)
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x(jz+1:)=0.0
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call four2a(x,nfft1,1,-1,0) !Forward FFT, r2c
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call four2a(cx,nfft1,1,-1,0) !Forward FFT, r2c
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df=12000.0/NFFT1
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ia=5000.0/df
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cx(ia:)=0.0
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@ -34,7 +34,7 @@ subroutine wav12(d2,d1,npts,nbitsam2)
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x(1:jz)=d2(1:jz)
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x(jz+1:)=0.0
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call four2a(x,nfft1,1,-1,0) !Forwarxd FFT, r2c
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call four2a(cx,nfft1,1,-1,0) !Forwarxd FFT, r2c
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cx(nfft1/2:)=0.0
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call four2a(cx,nfft2,1,1,-1) !Inverse FFT, c2r
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