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138 lines
4.3 KiB
Fortran
138 lines
4.3 KiB
Fortran
subroutine qra_loops(c00,npts2,nsps,mode,mode64,nsubmode,nFadingModel, &
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ndepth,nc1,nc2,ng2,naptype,jpk0,xdt,f0,width,snr2,irc,dat4)
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use packjt
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use timer_module, only: timer
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parameter (LN=2176*63) !LN=LL*NN; LL = 64*(mode64+2)
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character*37 decoded
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complex c00(0:npts2-1) !Analytic representation of dd(), 6000 Hz
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complex ,allocatable :: c0(:) !Ditto, with freq shift
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real a(3) !twkfreq params f,f1,f2
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real s3(LN) !Symbol spectra
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real s3avg(LN) !Averaged symbol spectra
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integer dat4(12),dat4x(12) !Decoded message (as 12 integers)
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integer nap(0:11) !AP return codes
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data nap/0,2,3,2,3,4,2,3,6,4,6,6/,nsave/0/
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save nsave,s3avg
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allocate(c0(0:npts2-1))
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irc=-99
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s3lim=20.
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ibwmax=11
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if(mode64.le.4) ibwmax=9
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ibwmin=ibwmax
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idtmax=3
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call qra_params(ndepth,maxaptype,idfmax,idtmax,ibwmin,ibwmax,maxdist)
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LL=64*(mode64+2)
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NN=63
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napmin=99
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ncall=0
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do iavg=0,1
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if(iavg.eq.1) then
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idfmax=1
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idtmax=1
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endif
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do idf=1,idfmax
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ndf=idf/2
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if(mod(idf,2).eq.0) ndf=-ndf
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a=0.
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a(1)=-(f0+0.4*ndf)
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call twkfreq(c00,c0,npts2,6000.0,a)
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do idt=1,idtmax
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ndt=idt/2
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if(iavg.eq.0) then
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if(mod(idt,2).eq.0) ndt=-ndt
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jpk=jpk0 + 240*ndt !240/6000 = 0.04 s = tsym/32
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if(jpk.lt.0) jpk=0
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call timer('spec64 ',0)
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call spec64(c0,nsps,mode,mode64,jpk,s3,LL,NN)
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call timer('spec64 ',1)
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call pctile(s3,LL*NN,40,base)
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s3=s3/base
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where(s3(1:LL*NN)>s3lim) s3(1:LL*NN)=s3lim
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else
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s3(1:LL*NN)=s3avg(1:LL*NN)
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endif
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do ibw=ibwmax,ibwmin,-2
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ndist=ndf**2 + ndt**2 + ((ibwmax-ibw)/2)**2
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if(ndist.gt.maxdist) cycle
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b90=1.728**ibw
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if(b90.gt.230.0) cycle
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if(b90.lt.0.15*width) exit
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ncall=ncall+1
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call timer('qra64_de',0)
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call qra64_dec(s3,nc1,nc2,ng2,naptype,0,nSubmode,b90, &
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nFadingModel,dat4,snr2,irc)
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call timer('qra64_de',1)
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if(irc.eq.0) go to 200
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if(irc.gt.0) call badmsg(irc,dat4,nc1,nc2,ng2)
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iirc=max(0,min(irc,11))
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if(irc.gt.0 .and. nap(iirc).lt.napmin) then
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dat4x=dat4
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b90x=b90
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snr2x=snr2
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napmin=nap(iirc)
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irckeep=irc
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xdtkeep=jpk/6000.0 - 1.0
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f0keep=-a(1)
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idfkeep=idf
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idtkeep=idt
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ibwkeep=ibw
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ndistx=ndist
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go to 100 !###
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endif
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enddo ! ibw (b90 loop)
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!### if(iand(ndepth,3).lt.3 .and. irc.ge.0) go to 100
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enddo ! idt (DT loop)
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enddo ! idf (f0 loop)
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! if(iavg.eq.0 .and. abs(jpk0-4320).le.1300) then
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if(iavg.eq.0) then
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a=0.
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a(1)=-f0
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call twkfreq(c00,c0,npts2,6000.0,a)
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jpk=3000 !### These definitions need work ###
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! if(nsps.ge.3600) jpk=4080 !###
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if(nsps.ge.3600) jpk=6000 !###
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call spec64(c0,nsps,mode,mode64,jpk,s3,LL,NN)
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call pctile(s3,LL*NN,40,base)
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s3=s3/base
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where(s3(1:LL*NN)>s3lim) s3(1:LL*NN)=s3lim
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s3avg(1:LL*NN)=s3avg(1:LL*NN)+s3(1:LL*NN)
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nsave=nsave+1
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endif
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if(iavg.eq.0 .and. nsave.lt.2) exit
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enddo ! iavg
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100 if(napmin.ne.99) then
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dat4=dat4x
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b90=b90x
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snr2=snr2x
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irc=irckeep
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xdt=xdtkeep
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f0=f0keep
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idt=idtkeep
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idf=idfkeep
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ibw=ibwkeep
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ndist=ndistx
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endif
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200 if(mode.eq.65 .and. nsps.eq.7200/2) xdt=xdt+0.4 !### Empirical -- WHY ??? ###
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if(irc.ge.0) then
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navg=nsave
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if(iavg.eq.0) navg=0
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!### For tests only:
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open(53,file='fort.53',status='unknown',position='append')
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call unpackmsg(dat4,decoded) !Unpack the user message
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write(53,3053) idf,idt,ibw,b90,xdt,f0,snr2,ndist,irc,navg,decoded(1:22)
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3053 format(3i5,f7.1,f7.2,2f7.1,3i4,2x,a22)
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close(53)
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!###
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nsave=0
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s3avg=0.
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irc=irc + 100*navg
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endif
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return
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end subroutine qra_loops
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