WSJT-X/lib/qra_loops.f90

138 lines
4.3 KiB
Fortran

subroutine qra_loops(c00,npts2,nsps,mode,mode64,nsubmode,nFadingModel, &
ndepth,nc1,nc2,ng2,naptype,jpk0,xdt,f0,width,snr2,irc,dat4)
use packjt
use timer_module, only: timer
parameter (LN=2176*63) !LN=LL*NN; LL = 64*(mode64+2)
character*37 decoded
complex c00(0:npts2-1) !Analytic representation of dd(), 6000 Hz
complex ,allocatable :: c0(:) !Ditto, with freq shift
real a(3) !twkfreq params f,f1,f2
real s3(LN) !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/,nsave/0/
save nsave,s3avg
allocate(c0(0:npts2-1))
irc=-99
s3lim=20.
ibwmax=11
if(mode64.le.4) ibwmax=9
ibwmin=ibwmax
idtmax=3
call qra_params(ndepth,maxaptype,idfmax,idtmax,ibwmin,ibwmax,maxdist)
LL=64*(mode64+2)
NN=63
napmin=99
ncall=0
do iavg=0,1
if(iavg.eq.1) then
idfmax=1
idtmax=1
endif
do idf=1,idfmax
ndf=idf/2
if(mod(idf,2).eq.0) ndf=-ndf
a=0.
a(1)=-(f0+0.4*ndf)
call twkfreq(c00,c0,npts2,6000.0,a)
do idt=1,idtmax
ndt=idt/2
if(iavg.eq.0) then
if(mod(idt,2).eq.0) ndt=-ndt
jpk=jpk0 + 240*ndt !240/6000 = 0.04 s = tsym/32
if(jpk.lt.0) jpk=0
call timer('spec64 ',0)
call spec64(c0,nsps,mode,mode64,jpk,s3,LL,NN)
call timer('spec64 ',1)
call pctile(s3,LL*NN,40,base)
s3=s3/base
where(s3(1:LL*NN)>s3lim) s3(1:LL*NN)=s3lim
else
s3(1:LL*NN)=s3avg(1:LL*NN)
endif
do ibw=ibwmax,ibwmin,-2
ndist=ndf**2 + ndt**2 + ((ibwmax-ibw)/2)**2
if(ndist.gt.maxdist) cycle
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
if(iavg.eq.0) then
a=0.
a(1)=-f0
call twkfreq(c00,c0,npts2,6000.0,a)
jpk=3000 !### These definitions need work ###
! if(nsps.ge.3600) jpk=4080 !###
if(nsps.ge.3600) jpk=6000 !###
call spec64(c0,nsps,mode,mode64,jpk,s3,LL,NN)
call pctile(s3,LL*NN,40,base)
s3=s3/base
where(s3(1:LL*NN)>s3lim) s3(1:LL*NN)=s3lim
s3avg(1:LL*NN)=s3avg(1:LL*NN)+s3(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
snr2=snr2x
irc=irckeep
xdt=xdtkeep
f0=f0keep
idt=idtkeep
idf=idfkeep
ibw=ibwkeep
ndist=ndistx
endif
200 if(mode.eq.65 .and. nsps.eq.7200/2) xdt=xdt+0.4 !### Empirical -- WHY ??? ###
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,navg,decoded(1:22)
3053 format(3i5,f7.1,f7.2,2f7.1,3i4,2x,a22)
close(53)
!###
nsave=0
s3avg=0.
irc=irc + 100*navg
endif
return
end subroutine qra_loops