Added routine "chkss2" to test sync vector for sanity before attenpting

Fano decode.


git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@3270 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

lib/Makefile.MinGW

@@ -33,7 +33,7 @@ OBJS1 = pctile.o graycode.o sort.o ssort.o \
 	fil3.o redsync.o decoder.o grid2n.o n2grid.o timer.o \
 	softsym.o getlags.o afc9.o fchisq.o twkfreq.o downsam9.o \
 	peakdt9.o symspec2.o stdmsg.o morse.o azdist.o geodist.o \
-	rig_control.o fillcom.o
+	rig_control.o fillcom.o chkss2.o zplot9.o
 
 libjt9.a: $(OBJS1)
 	ar cr libjt9.a $(OBJS1) 

lib/chkss2.f90

@@ -0,0 +1,23 @@
+subroutine chkss2(ss2,schk)
+
+  real ss2(0:8,85)
+  real s(0:8,85)
+  real s1(0:5)
+  include 'jt9sync.f90'
+
+  ave=sum(ss2)/(9*85)
+  s=ss2/ave-1.0
+
+!  call zplot9(s)
+  s1=0.
+  do lag=0,5
+     do i=1,16
+        j=ii(i)+lag
+        if(j.le.85) s1(lag)=s1(lag) + s(0,j)
+     enddo
+  enddo
+  schk=s1(0)/16.0
+
+  return
+end subroutine chkss2
+

lib/decoder.f90

@@ -126,41 +126,45 @@ subroutine decoder(ss,c0,nstandalone)
            call timer('softsym ',0)
            fpk=1000.0 + df3*(i-1)
            call softsym(c0,npts8,nsps8,newdat,fpk,syncpk,snrdb,xdt,freq,   &
-                drift,i1SoftSymbols)
-
+                drift,schk,i1SoftSymbols)
            call timer('softsym ',1)
 
-           call timer('decode9 ',0)
-           call decode9(i1SoftSymbols,limit,nlim,msg)
-           call timer('decode9 ',1)
+           if(schk.ge.3.0) then
 
-           sync=(syncpk+1)/4.0
-           if(sync.lt.0.0 .or. snrdb.lt.dblim-2.0) sync=0.0
-           nsync=sync
-           if(nsync.gt.10) nsync=10
-           nsnr=nint(snrdb)
-           ndrift=nint(drift/df3)
+              call timer('decode9 ',0)
+              call decode9(i1SoftSymbols,limit,nlim,msg)
+              call timer('decode9 ',1)
 
-           write(38,3002) nutc,nsnr,i,freq,ccfred(i),nlim,msg
-3002       format(i4.4,i5,i6,2f8.1,i9,2x,a22)
+              sync=(syncpk+1)/4.0
+              if(sync.lt.0.0 .or. snrdb.lt.dblim-2.0) sync=0.0
+              nsync=sync
+              if(nsync.gt.10) nsync=10
+              nsnr=nint(snrdb)
+              ndrift=nint(drift/df3)
+              
+              write(38,3002) nutc,nsnr,i,freq,ccfred(i),schk,nlim,msg
+3002          format(i4.4,i5,i6,f8.1,2f6.1,i9,2x,a22)
 
-           if(msg.ne.'                      ') then
-              if(nqd.eq.0) ndecodes0=ndecodes0+1
-              if(nqd.eq.1) ndecodes1=ndecodes1+1
-
-              write(*,fmt) nutc,nsync,nsnr,xdt,freq,ndrift,msg
-              write(13,fmt) nutc,nsync,nsnr,xdt,freq,ndrift,msg
+              if(msg.ne.'                      ') then
+                 if(nqd.eq.0) ndecodes0=ndecodes0+1
+                 if(nqd.eq.1) ndecodes1=ndecodes1+1
+                 
+                 write(*,fmt) nutc,nsync,nsnr,xdt,freq,ndrift,msg
+                 write(13,fmt) nutc,nsync,nsnr,xdt,freq,ndrift,msg
 !              write(14,1014) nutc,nsync,nsnr,xdt,freq,ndrift,ccfred(i),nlim,msg
 !1014          format(i4.4,i4,i5,f6.1,f8.0,i4,f9.1,i9,3x,a22)
 
-              iaa=max(1,i-3)
-              ibb=min(NSMAX,i+11)
-              fgood=f
-              nsynced=1
-              ndecoded=1
-              ccfok(iaa:ibb)=.false.
-              done(iaa:ibb)=.true.              
-              call flush(6)
+                 iaa=max(1,i-1)
+                 ibb=min(NSMAX,i+22)
+                 fgood=f
+                 nsynced=1
+                 ndecoded=1
+                 ccfok(iaa:ibb)=.false.
+                 done(iaa:ibb)=.true.              
+                 call flush(6)
+              endif
+           else
+              write(38,3002) nutc,-99,i,freq,ccfred(i),schk,0
            endif
         endif
      enddo

lib/softsym.f90

@@ -1,5 +1,5 @@
 subroutine softsym(c0,npts8,nsps8,newdat,fpk,syncpk,snrdb,xdt,freq,drift,   &
-     i1SoftSymbols)
+     schk,i1SoftSymbols)
 
 ! Compute the soft symbols
 
@@ -23,17 +23,18 @@ subroutine softsym(c0,npts8,nsps8,newdat,fpk,syncpk,snrdb,xdt,freq,drift,   &
   fsample=1500.0/ndown
   a=0.
   call afc9(c3,nz3,fsample,a,syncpk)  !Find deltaF, fDot, fDDot
+  freq=fpk - a(1)
+  drift=-2.0*a(2)
 
   call twkfreq(c3,c5,nz3,fsample,a)   !Correct for deltaF, fDot, fDDot
 
 ! Compute soft symbols (in scrambled order)
-  call symspec2(c5,nz3,nsps8,nspsd,fsample,snrdb,i1SoftSymbolsScrambled)
+  call symspec2(c5,nz3,nsps8,nspsd,fsample,freq,drift,snrdb,schk,      &
+       i1SoftSymbolsScrambled)
+  if(snrdb.lt.-99.0) return
 
 ! Remove interleaving
   call interleave9(i1SoftSymbolsScrambled,-1,i1SoftSymbols)
-  
-  freq=fpk - a(1)
-  drift=-2.0*a(2)
 
   return
 end subroutine softsym

lib/symspec2.f90

@@ -1,4 +1,5 @@
-subroutine symspec2(c5,nz3,nsps8,nspsd,fsample,snrdb,i1SoftSymbolsScrambled)
+subroutine symspec2(c5,nz3,nsps8,nspsd,fsample,freq,drift,snrdb,schk,    &
+     i1SoftSymbolsScrambled)
 
 ! Compute soft symbols from the final downsampled data
 
@@ -33,6 +34,11 @@ subroutine symspec2(c5,nz3,nsps8,nspsd,fsample,snrdb,i1SoftSymbolsScrambled)
      enddo
   enddo
 
+!###
+!  write(30) freq,drift,ss2
+!  call flush(30)
+  call chkss2(ss2,schk)
+  if(schk.lt.3.0) go to 900
 !###
   ss=0.
   sig=0.
@@ -81,5 +87,5 @@ subroutine symspec2(c5,nz3,nsps8,nspsd,fsample,snrdb,i1SoftSymbolsScrambled)
      enddo
   enddo
 
-  return
+900 return
 end subroutine symspec2

lib/zplot9.f90

@@ -0,0 +1,29 @@
+subroutine zplot9(s)
+
+  real s(0:8,85)
+  character*1 line(85),mark(0:6)
+  data mark/' ',' ','.','-','+','X','$'/
+  include 'jt9sync.f90'
+
+  do j=8,0,-1
+     do i=1,85
+        n=(s(j,i))
+        if(n.lt.0) n=0
+        if(n.gt.6) n=6
+        line(i)=mark(n)
+     enddo
+     write(32,1010) j,line
+1010 format(i1,1x,85a1)
+  enddo
+  do i=1,85
+     line(i)=' '
+     if(isync(i).eq.1) line(i)='@'
+  enddo
+  write(32,1015)
+1015 format(87('-'))
+  write(32,1020) line
+1020 format(2x,85a1)
+  write(32,1015)
+
+  return
+end subroutine zplot9

mainwindow.cpp

@@ -1,4 +1,4 @@
-//-------------------------------------------------------------- MainWindow
+//------------------------------------------------------------- MainWindow
 #include "mainwindow.h"
 #include "ui_mainwindow.h"
 #include "devsetup.h"