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https://github.com/saitohirga/WSJT-X.git
synced 2025-05-28 04:12:32 -04:00
New sync66a subroutine for QRA66.
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Joe Taylor
parent
2846a6422a
commit
c91baddb2c
@ -577,7 +577,7 @@ set (wsjt_FSRCS
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lib/symspec65.f90
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lib/sync4.f90
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lib/sync64.f90
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lib/sync66.f90
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lib/sync66a.f90
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lib/sync65.f90
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lib/ft4/getcandidates4.f90
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lib/ft4/get_ft4_bitmetrics.f90
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@ -1327,6 +1327,9 @@ target_link_libraries (qra64sim wsjt_fort wsjt_cxx)
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add_executable (qra66sim lib/qra/qra66/qra66sim.f90 wsjtx.rc)
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target_link_libraries (qra66sim wsjt_fort wsjt_cxx)
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#add_executable (test_sync66 lib/test_sync66.f90 wsjtx.rc)
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#target_link_libraries (test_sync66 wsjt_fort wsjt_cxx)
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add_executable (jt49sim lib/jt49sim.f90 wsjtx.rc)
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target_link_libraries (jt49sim wsjt_fort wsjt_cxx)
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@ -119,30 +119,30 @@ contains
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c0(NFFT2/2+1:NFFT2)=0. !Zero the top half
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c0(0)=0.5*c0(0)
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call four2a(c0,nfft2,1,1,1) !Inverse c2c FFT
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call sync66(c0,f0,jpk,sync) !c0 is analytic signal at 6000 S/s
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xdt=jpk/6000.0 - 0.5
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! call sync66(c0,f0,jpk,sync) !c0 is analytic signal at 6000 S/s
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! write(*,3003) jpk,f0,sync
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!3003 format('A',i6,f8.2,f12.1)
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ntol=100
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call sync66a(iwave,15*12000,nsps,nfqso,ntol,xdt,f0)
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jpk=(xdt+0.5)*6000
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if(jpk.lt.0) jpk=0
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! Genie sync:
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! jpk=3600
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! xdt=jpk/6000.0 - 0.5
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! f0=1510
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! f0=1490
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a=0.
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a(1)=-(f0 + 1.5*baud)
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call twkfreq(c0,c0,85*NSPS,6000.0,a)
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! a(1)=-(f0 + 1.5*baud) !For sync66
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a(1)=-(f0 + 2.0*baud) !For sync66a
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call twkfreq(c0,c0,15*6000,6000.0,a)
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call spec66(c0(jpk:jpk+85*NSPS-1),s3)
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s3a=s3/maxval(s3)
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! do j=1,63
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! ipk=maxloc(s3a(-64:127,j))
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! write(54,3054) j,ipk(1)-65
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!3054 format(2i8)
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! do i=-64,127
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! write(53,3053) i,2*s3a(i,j)+j-1
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!3053 format(i8,f12.6)
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! enddo
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! enddo
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call pctile(s3a,192*63,40,base)
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s3a=s3a/base
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! print*,'A',maxval(s3a),ndepth,maxaptype,naptype
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s3lim=10.
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where(s3a(-64:127,1:63)>s3lim) s3a(-64:127,1:63)=s3lim
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@ -170,8 +170,6 @@ contains
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irc,qual,ntrperiod,fmid,w50)
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!###
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endif
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! write(*,3001) snr2,xdt,f0,decoded(1:22)
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!3001 format('B',f5.1,f6.2,f7.1,2x,a22)
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return
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end subroutine decode
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94
lib/sync66a.f90
Normal file
94
lib/sync66a.f90
Normal file
@ -0,0 +1,94 @@
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subroutine sync66a(iwave,nmax,nsps,nfqso,ntol,xdt,f0)
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parameter (NSTEP=4) !Quarter-symbol steps
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parameter (IZ=1600,JZ=352,NSPSMAX=1920)
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integer*2 iwave(0:nmax-1) !Raw data
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integer b11(11) !Barker 11 code
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integer ijpk(2) !Indices i and j at peak of sync_sig
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real s1(IZ,JZ) !Symbol spectra
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real x(JZ) !Work array; 2FSK sync modulation
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real sync(4*85) !sync vector
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real sync_sig(-64:64,-15:15)
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complex c0(0:NSPSMAX) !Complex spectrum of symbol
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data b11/1,1,1,0,0,0,1,0,0,1,0/ !Barker 11 code
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data sync(1)/99.0/
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save sync
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if(sync(1).eq.99.0) then
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sync=0.
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do k=1,22
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kk=k
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if(kk.gt.11) kk=k-11
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sync(16*k-15)=2.0*b11(kk) - 1.0
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enddo
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endif
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nfft=2*NSPS
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df=12000.0/nfft !3.125 Hz
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istep=nsps/NSTEP
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fac=1/32767.0
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do j=1,JZ !Compute symbol spectra
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ia=(j-1)*istep
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ib=ia+nsps-1
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k=-1
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do i=ia,ib,2
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xx=iwave(i)
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yy=iwave(i+1)
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k=k+1
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c0(k)=fac*cmplx(xx,yy)
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enddo
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c0(k+1:nfft/2)=0.
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call four2a(c0,nfft,1,-1,0) !r2c FFT
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do i=1,IZ
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s1(i,j)=real(c0(i))**2 + aimag(c0(i))**2
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enddo
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enddo
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i0=nint(nfqso/df)
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call pctile(s1(i0-64:i0+192,1:JZ),129*JZ,40,base)
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s1=s1/base
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s1max=20.0
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! Make this simpler: just add the 22 nonzero values.
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do j=1,JZ
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x(j)=maxval(s1(i0-64:i0+192,j))
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if(x(j).gt.s1max) s1(i0-64:i0+192,j)=s1(i0-64:i0+192,j)*s1max/x(j)
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enddo
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dt4=nsps/(NSTEP*12000.0)
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j0=0.5/dt4
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sync_sig=0.
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ia=min(64,nint(ntol/df))
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do i=-ia,ia
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x=s1(i0+2+i,:)-s1(i0+i,:)
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do lag=-15,15
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do n=1,4*85
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j=n+lag+11
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if(j.ge.1 .and. j.le.JZ) sync_sig(i,lag)=sync_sig(i,lag) + sync(n)*x(j)
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enddo
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enddo
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enddo
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ijpk=maxloc(sync_sig)
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ii=ijpk(1)-65
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jj=ijpk(2)-16
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! Use peakup() here?
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f0=nfqso + ii*df
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jdt=jj
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tsym=nsps/12000.0
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xdt=jdt*tsym/4.0
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! do i=-64,64
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! write(13,3013) nfqso+i*df,sync_sig(i,jj)
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!3013 format(2f12.3)
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! enddo
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! do j=-15,15
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! write(14,3014) j,j*dt4,sync_sig(ii,j)
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!3014 format(i5,2f12.3)
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! enddo
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return
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end subroutine sync66a
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