Basic message averaging implemented for QRA65.

lib/qra_loops.f90

@@ -9,9 +9,12 @@ subroutine qra_loops(c00,npts2,mode,mode64,nsubmode,nFadingModel,      &
   complex c0(0:720000)             !Ditto, with freq shift
   real a(3)                        !twkfreq params f,f1,f2
   real s3(LN)                      !Symbol spectra
+  real s3a(LN)                     !Saved symbol spectra
+  real s3avg(LN)                   !Averaged symbol spectra
   integer dat4(12),dat4x(12)       !Decoded message (as 12 integers)
   integer nap(0:11)                !AP return codes
-  data nap/0,2,3,2,3,4,2,3,6,4,6,6/
+  data nap/0,2,3,2,3,4,2,3,6,4,6,6/,nsave/0/
+  save nsave,s3avg
 
   irc=-99
   s3lim=20.
@@ -30,56 +33,72 @@ subroutine qra_loops(c00,npts2,mode,mode64,nsubmode,nFadingModel,      &
   if(ndepth.eq.2) maxdist=10
   if(ndepth.eq.3) maxdist=30
 
-  do idf=1,idfmax
+  do iavg=0,1
-     ndf=idf/2
+     if(iavg.eq.1) then
-     if(mod(idf,2).eq.0) ndf=-ndf
+        idfmax=1
-     a=0.
+        idtmax=1
-     a(1)=-(f0+0.4*ndf)
+     endif
-     call twkfreq(c00,c0,npts2,6000.0,a)
+     do idf=1,idfmax
-     do idt=1,idtmax
+        ndf=idf/2
-        ndt=idt/2
+        if(mod(idf,2).eq.0) ndf=-ndf
-        if(mod(idt,2).eq.0) ndt=-ndt
+        a=0.
-        jpk=jpk0 + 240*ndt                  !240/6000 = 0.04 s = tsym/32
+        a(1)=-(f0+0.4*ndf)
-        if(jpk.lt.0) jpk=0
+        call twkfreq(c00,c0,npts2,6000.0,a)
-        call timer('spec64  ',0)
+        do idt=1,idtmax
-        call spec64(c0,nsps,mode,jpk,s3,LL,NN)
+           ndt=idt/2
-        call timer('spec64  ',1)
+           if(iavg.eq.0) then
-        call pctile(s3,LL*NN,40,base)
+              if(mod(idt,2).eq.0) ndt=-ndt
-        s3=s3/base
+              jpk=jpk0 + 240*ndt                  !240/6000 = 0.04 s = tsym/32
-        where(s3(1:LL*NN)>s3lim) s3(1:LL*NN)=s3lim
+              if(jpk.lt.0) jpk=0
-        do ibw=ibwmax,ibwmin,-2
+              call timer('spec64  ',0)
-           ndist=ndf**2 + ndt**2 + ((ibwmax-ibw)/2)**2
+              call spec64(c0,nsps,mode,jpk,s3,LL,NN)
-           if(ndist.gt.maxdist) cycle
+              call timer('spec64  ',1)
-           b90=1.728**ibw
+              call pctile(s3,LL*NN,40,base)
-           if(b90.gt.230.0) cycle
+              s3=s3/base
-           if(b90.lt.0.15*width) exit
+              where(s3(1:LL*NN)>s3lim) s3(1:LL*NN)=s3lim
-           ncall=ncall+1
+              if(iavg.eq.0 .and. idf.eq.1 .and. idt.eq.1) s3a(1:LL*NN)=s3(1:LL*NN)
-           call timer('qra64_de',0)
+           else
-           call qra64_dec(s3,nc1,nc2,ng2,naptype,0,nSubmode,b90,      &
+              s3(1:LL*NN)=s3avg(1:LL*NN)
-                nFadingModel,dat4,snr2,irc)
-           call timer('qra64_de',1)
-           if(irc.eq.0) go to 200
-           if(irc.gt.0) call badmsg(irc,dat4,nc1,nc2,ng2)
-           iirc=max(0,min(irc,11))
-           if(irc.gt.0 .and. nap(iirc).lt.napmin) then
-              dat4x=dat4
-              b90x=b90
-              snr2x=snr2
-              napmin=nap(iirc)
-              irckeep=irc
-              xdtkeep=jpk/6000.0 - 1.0
-              f0keep=-a(1)
-              idfkeep=idf
-              idtkeep=idt
-              ibwkeep=ibw
-              ndistx=ndist
-              go to 100   !###
            endif
-        enddo  ! ibw (b90 loop)
+           do ibw=ibwmax,ibwmin,-2
-!###        if(iand(ndepth,3).lt.3 .and. irc.ge.0) go to 100
+              ndist=ndf**2 + ndt**2 + ((ibwmax-ibw)/2)**2
-     enddo  ! idt (DT loop)
+              if(ndist.gt.maxdist) cycle
-  enddo  ! idf (f0 loop)
+              b90=1.728**ibw
-
+              if(b90.gt.230.0) cycle
+              if(b90.lt.0.15*width) exit
+              ncall=ncall+1
+              call timer('qra64_de',0)
+              call qra64_dec(s3,nc1,nc2,ng2,naptype,0,nSubmode,b90,      &
+                   nFadingModel,dat4,snr2,irc)
+              call timer('qra64_de',1)
+              if(irc.eq.0) go to 200
+              if(irc.gt.0) call badmsg(irc,dat4,nc1,nc2,ng2)
+              iirc=max(0,min(irc,11))
+              if(irc.gt.0 .and. nap(iirc).lt.napmin) then
+                 dat4x=dat4
+                 b90x=b90
+                 snr2x=snr2
+                 napmin=nap(iirc)
+                 irckeep=irc
+                 xdtkeep=jpk/6000.0 - 1.0
+                 f0keep=-a(1)
+                 idfkeep=idf
+                 idtkeep=idt
+                 ibwkeep=ibw
+                 ndistx=ndist
+                 go to 100   !###
+              endif
+           enddo  ! ibw (b90 loop)
+           !###        if(iand(ndepth,3).lt.3 .and. irc.ge.0) go to 100
+        enddo  ! idt (DT loop)
+     enddo  ! idf (f0 loop)
+     if(iavg.eq.0 .and. abs(jpk0-4320).le.1300) then
+        s3avg(1:LL*NN)=s3avg(1:LL*NN)+s3a(1:LL*NN)
+        nsave=nsave+1
+     endif
+     if(iavg.eq.0 .and. nsave.lt.2) exit
+  enddo  ! iavg 
+  
 100 if(napmin.ne.99) then
      dat4=dat4x
      b90=b90x
@@ -95,14 +114,18 @@ subroutine qra_loops(c00,npts2,mode,mode64,nsubmode,nFadingModel,      &
 
 200 if(mode.eq.65) xdt=xdt+0.4        !### Empirical -- WHY ??? ###
 
-!### For tests only:
   if(irc.ge.0) then
+     navg=nsave
+     if(iavg.eq.0) navg=0
+     !### For tests only:
      open(53,file='fort.53',status='unknown',position='append')
      call unpackmsg(dat4,decoded)               !Unpack the user message
-     write(53,3053) idf,idt,ibw,b90,xdt,f0,snr2,ndist,irc,decoded(1:22)
+     write(53,3053) idf,idt,ibw,b90,xdt,f0,snr2,ndist,irc,navg,decoded(1:22)
-3053 format(3i5,f7.1,f7.2,2f7.1,2i5,2x,a22)
+3053 format(3i5,f7.1,f7.2,2f7.1,3i4,2x,a22)
      close(53)
+     !###  
+     nsave=0
+     s3avg=0.
   endif
-!###  
   return
 end subroutine qra_loops